1.37.0 Beta 1

[SVN r49441]

build/Jamfile.v2

@@ -0,0 +1,94 @@
+# Copyright David Abrahams 2001-2006. Distributed under the Boost
+# Software License, Version 1.0. (See accompanying
+# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import os ;
+import modules ;
+
+import python ;
+
+if ! [ python.configured ] && ! ( --without-python in  [ modules.peek : ARGV ] )
+{
+    # Attempt default configuration of python
+    import toolset : using ;
+    using python ;
+    
+    if ! [ python.configured ]
+    {
+        ECHO "WARNING: No python installation configured and autoconfiguration" ; 
+        ECHO "         failed.  See http://www.boost.org/libs/python/doc/building.html" ;
+        ECHO "         for configuration instructions or pass --without-python to" ;
+        ECHO "         suppress this message and silently skip all Boost.Python targets" ;
+    }
+}
+
+project boost/python
+  : source-location ../src
+  ;
+
+rule cond ( test ? : yes * : no * ) { if $(test) { return $(yes) ; } else { return $(no) ; } }
+rule unless ( test ? : yes * : no * ) { if ! $(test) { return $(yes) ; } else { return $(no) ; } }
+
+lib boost_python
+    : # sources
+    numeric.cpp
+    list.cpp
+    long.cpp
+    dict.cpp
+    tuple.cpp
+    str.cpp
+    slice.cpp
+
+    converter/from_python.cpp
+    converter/registry.cpp
+    converter/type_id.cpp
+    object/enum.cpp
+    object/class.cpp
+    object/function.cpp
+    object/inheritance.cpp
+    object/life_support.cpp
+    object/pickle_support.cpp
+    errors.cpp
+    module.cpp
+    converter/builtin_converters.cpp
+    converter/arg_to_python_base.cpp
+    object/iterator.cpp
+    object/stl_iterator.cpp
+    object_protocol.cpp
+    object_operators.cpp
+    wrapper.cpp
+    import.cpp
+    exec.cpp
+    object/function_doc_signature.cpp
+    :   # requirements
+        <link>static:<define>BOOST_PYTHON_STATIC_LIB 
+        <define>BOOST_PYTHON_SOURCE
+      
+        # On Windows, all code using Python has to link to the Python
+        # import library.
+        #
+        # On *nix we never link libboost_python to libpython.  When
+        # extending Python, all Python symbols are provided by the
+        # Python interpreter executable.  When embedding Python, the
+        # client executable is expected to explicitly link to
+        # /python//python (the target representing libpython) itself.
+        #
+        # python_for_extensions is a target defined by Boost.Build to
+        # provide the Python include paths, and on Windows, the Python
+        # import library, as usage requirements.
+        [ cond [ python.configured ] : <library>/python//python_for_extensions ]
+        
+        # we prevent building when there is no python available
+        # as it's not possible anyway, and to cause dependents to
+        # fail to build
+        [ unless [ python.configured ] : <build>no ]
+
+        <python-debugging>on:<define>BOOST_DEBUG_PYTHON
+    :   # default build
+        <link>shared
+    :   # usage requirements
+        <link>static:<define>BOOST_PYTHON_STATIC_LIB
+        <python-debugging>on:<define>BOOST_DEBUG_PYTHON
+    ;
+
+boost-install boost_python ;

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build/como.mak

@@ -1,51 +0,0 @@
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build/test/test.dsp

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build/tru64.mak

@@ -1,51 +0,0 @@
-#
-# Tested with:
-# Compaq C++ V6.2-024 for Digital UNIX V5.0 (Rev. 910)
-#
-# Python 1.5.2 was installed without any customizations.
-# boost_all.zip vers. 1.18.1 was unpacked using unzip -aa and not modified.
-# STLport-4.1b3 was unpacked using unzip -aa and not modified.
-#
-# Initial version 2000-10-20: Ralf W. Grosse-Kunstleve, rwgk@cci.lbl.gov
-#
-
-PYINC= /usr/local/include/python1.5
-BOOSTINC= /usr/local/boost_1_18_1
-STLPORTINC= /usr/local/STLport-4.1b3/stlport
-STLPORTOPTS= \
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- -D__STL_NO_NEW_C_HEADERS \
- -D_RWSTD_COMPILE_INSTANTIATE=1
-
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-         $(STDOPTS) $(WARNOPTS)
-
-LD= cxx
-LDOPTS= -shared -expect_unresolved '*'
-
-OBJ = extclass.o functions.o init_function.o module.o newtypes.o \
-      objects.o py.o subclass.o
-
-.SUFFIXES: .o .cpp
-
-all: demo.so hello.so
-
-demo.so: $(OBJ) extclass_demo.o
-	$(LD) $(LDOPTS) $(OBJ) extclass_demo.o -o demo.so
-
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-.cpp.o:
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-	rm -rf cxx_repository
-	rm -f *.pyc

doc/Jamfile

@@ -0,0 +1,23 @@
+# Copyright David Abrahams 2006. Distributed under the Boost
+# Software License, Version 1.0. (See accompanying
+# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+import docutils ;
+
+import path ;
+sources = building.rst ;
+bases = $(sources:S=) ;
+  
+# This is a path relative to the html/ subdirectory where the
+# generated output will eventually be moved.
+stylesheet = "--stylesheet=../../../rst.css" ;
+
+for local b in $(bases)
+{
+    html $(b) : $(b).rst : 
+      
+    <docutils-html>"-gdt --source-url="./$(b).rst" --link-stylesheet --traceback --trim-footnote-reference-space --footnote-references=superscript "$(stylesheet)
+  ;
+}
+
+alias htmls : $(bases) ;
+stage . : $(bases) ;

doc/PyConDC_2003/bpl.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="refresh" content="0; URL=http://www.boost-consulting.com/writing/bpl.html">
+
+    <title>Loading: &ldquo;Building Hybrid Systems With Boost.Python&rdquo;</title>
+  </head>
+
+  <body>
+    Loading...; if nothing happens, please go to <a href= "http://www.boost-consulting.com/writing/bpl.html">http://www.boost-consulting.com/writing/bpl.html</a>.
+  </body>
+</html>
+

doc/PyConDC_2003/bpl.txt

@@ -0,0 +1,5 @@
+.. Copyright David Abrahams 2006. Distributed under the Boost
+.. Software License, Version 1.0. (See accompanying
+.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+This file has been moved to http://www.boost-consulting.com/writing/bpl.txt.

doc/PyConDC_2003/bpl_mods.txt

@@ -0,0 +1,912 @@
+Copyright David Abrahams 2006. Distributed under the Boost
+Software License, Version 1.0. (See accompanying
+file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+.. This is a comment. Note how any initial comments are moved by
+   transforms to after the document title, subtitle, and docinfo.
+
+.. Need intro and conclusion
+.. Exposing classes
+    .. Constructors
+    .. Overloading
+    .. Properties and data members
+    .. Inheritance
+    .. Operators and Special Functions
+    .. Virtual Functions
+.. Call Policies
+
+++++++++++++++++++++++++++++++++++++++++++++++
+ Introducing Boost.Python (Extended Abstract)
+++++++++++++++++++++++++++++++++++++++++++++++
+
+
+.. bibliographic fields (which also require a transform):
+
+:Author: David Abrahams
+:Address: 45 Walnut Street
+          Somerville, MA 02143
+:Contact: dave@boost-consulting.com
+:organization: `Boost Consulting`_
+:date: $Date$
+:status: This is a "work in progress"
+:version: 1
+:copyright: Copyright David Abrahams 2002. All rights reserved
+
+:Dedication:
+
+    For my girlfriend, wife, and partner Luann
+
+:abstract:
+
+    This paper describes the Boost.Python library, a system for
+    C++/Python interoperability.
+
+.. meta::
+   :keywords: Boost,python,Boost.Python,C++
+   :description lang=en: C++/Python interoperability with Boost.Python
+
+.. contents:: Table of Contents
+.. section-numbering::
+
+
+.. _`Boost Consulting`: http://www.boost-consulting.com
+
+==============
+ Introduction
+==============
+
+Python and C++ are in many ways as different as two languages could
+be: while C++ is usually compiled to machine-code, Python is
+interpreted.  Python's dynamic type system is often cited as the
+foundation of its flexibility, while in C++ static typing is the
+cornerstone of its efficiency. C++ has an intricate and difficult
+meta-language to support compile-time polymorphism, while Python is
+a uniform language with convenient runtime polymorphism.
+
+Yet for many programmers, these very differences mean that Python and
+C++ complement one another perfectly.  Performance bottlenecks in
+Python programs can be rewritten in C++ for maximal speed, and
+authors of powerful C++ libraries choose Python as a middleware
+language for its flexible system integration capabilities.
+Furthermore, the surface differences mask some strong similarities:
+
+* 'C'-family control structures (if, while, for...)
+
+* Support for object-orientation, functional programming, and generic
+  programming (these are both *multi-paradigm* programming languages.)
+
+* Comprehensive operator overloading facilities, recognizing the
+  importance of syntactic variability for readability and
+  expressivity.
+
+* High-level concepts such as collections and iterators.
+
+* High-level encapsulation facilities (C++: namespaces, Python: modules)
+  to support the design of re-usable libraries.
+
+* Exception-handling for effective management of error conditions.
+
+* C++ idioms in common use, such as handle/body classes and
+  reference-counted smart pointers mirror Python reference semantics.
+
+Python provides a rich 'C' API for writers of 'C' extension modules.
+Unfortunately, using this API directly for exposing C++ type and
+function interfaces to Python is much more tedious than it should be.
+This is mainly due to the limitations of the 'C' language.  Compared to
+C++ and Python, 'C' has only very rudimentary abstraction facilities.
+Support for exception-handling is completely missing. One important
+undesirable consequence is that 'C' extension module writers are
+required to manually manage Python reference counts. Another unpleasant
+consequence is a very high degree of repetition of similar code in 'C'
+extension modules. Of course highly redundant code does not only cause
+frustration for the module writer, but is also very difficult to
+maintain.
+
+The limitations of the 'C' API have lead to the development of a
+variety of wrapping systems. SWIG_ is probably the most popular package
+for the integration of C/C++ and Python. A more recent development is
+the SIP_ package, which is specifically designed for interfacing Python
+with the Qt_ graphical user interface library. Both SWIG and SIP
+introduce a new specialized language for defining the inter-language
+bindings. Of course being able to use a specialized language has
+advantages, but having to deal with three different languages (Python,
+C/C++ and the interface language) also introduces practical and mental
+difficulties. The CXX_ package demonstrates an interesting alternative.
+It shows that at least some parts of Python's 'C' API can be wrapped
+and presented through a much more user-friendly C++ interface. However,
+unlike SWIG and SIP, CXX does not include support for wrapping C++
+classes as new Python types. CXX is also no longer actively developed.
+
+In some respects Boost.Python combines ideas from SWIG and SIP with
+ideas from CXX. Like SWIG and SIP, Boost.Python is a system for
+wrapping C++ classes as new Python "built-in" types, and C/C++
+functions as Python functions. Like CXX, Boost.Python presents Python's
+'C' API through a C++ interface. Boost.Python goes beyond the scope of
+other systems with the unique support for C++ virtual functions that
+are overrideable in Python, support for organizing extensions as Python
+packages with a central registry for inter-language type conversions,
+and a convenient mechanism for tying into Python's serialization engine
+(pickle). Importantly, all this is achieved without introducing a new
+syntax. Boost.Python leverages the power of C++ meta-programming
+techniques to introspect about the C++ type system, and presents a
+simple, IDL-like C++ interface for exposing C/C++ code in extension
+modules. Boost.Python is a pure C++ library, the inter-language
+bindings are defined in pure C++, and other than a C++ compiler only
+Python itself is required to get started with Boost.Python. Last but
+not least, Boost.Python is an unrestricted open source library. There
+are no strings attached even for commercial applications.
+
+.. _SWIG: http://www.swig.org/
+.. _SIP: http://www.riverbankcomputing.co.uk/sip/index.php
+.. _Qt: http://www.trolltech.com/
+.. _CXX: http://cxx.sourceforge.net/
+
+===========================
+ Boost.Python Design Goals 
+===========================
+
+The primary goal of Boost.Python is to allow users to expose C++
+classes and functions to Python using nothing more than a C++
+compiler.  In broad strokes, the user experience should be one of
+directly manipulating C++ objects from Python.
+
+However, it's also important not to translate all interfaces *too*
+literally: the idioms of each language must be respected.  For
+example, though C++ and Python both have an iterator concept, they are
+expressed very differently.  Boost.Python has to be able to bridge the
+interface gap.
+
+It must be possible to insulate Python users from crashes resulting
+from trivial misuses of C++ interfaces, such as accessing
+already-deleted objects.  By the same token the library should
+insulate C++ users from low-level Python 'C' API, replacing
+error-prone 'C' interfaces like manual reference-count management and
+raw ``PyObject`` pointers with more-robust alternatives.
+
+Support for component-based development is crucial, so that C++ types
+exposed in one extension module can be passed to functions exposed in
+another without loss of crucial information like C++ inheritance
+relationships.
+
+Finally, all wrapping must be *non-intrusive*, without modifying or
+even seeing the original C++ source code.  Existing C++ libraries have
+to be wrappable by third parties who only have access to header files
+and binaries.
+
+==========================
+ Hello Boost.Python World
+==========================
+
+And now for a preview of Boost.Python, and how it improves on the raw
+facilities offered by Python. Here's a function we might want to
+expose::
+
+    char const* greet(unsigned x)
+    {
+       static char const* const msgs[] = { "hello", "Boost.Python", "world!" };
+
+       if (x > 2) 
+           throw std::range_error("greet: index out of range");
+
+       return msgs[x];
+    }
+
+To wrap this function in standard C++ using the Python 'C' API, we'd
+need something like this::
+
+    extern "C" // all Python interactions use 'C' linkage and calling convention
+    {
+        // Wrapper to handle argument/result conversion and checking
+        PyObject* greet_wrap(PyObject* args, PyObject * keywords)
+        {
+             int x;
+             if (PyArg_ParseTuple(args, "i", &x))    // extract/check arguments
+             {
+                 char const* result = greet(x);      // invoke wrapped function
+                 return PyString_FromString(result); // convert result to Python
+             }
+             return 0;                               // error occurred
+        }
+
+        // Table of wrapped functions to be exposed by the module
+        static PyMethodDef methods[] = {
+            { "greet", greet_wrap, METH_VARARGS, "return one of 3 parts of a greeting" }
+            , { NULL, NULL, 0, NULL } // sentinel
+        };
+
+        // module initialization function
+        DL_EXPORT init_hello()
+        {
+            (void) Py_InitModule("hello", methods); // add the methods to the module
+        }
+    }
+
+Now here's the wrapping code we'd use to expose it with Boost.Python::
+
+    #include <boost/python.hpp>
+    using namespace boost::python;
+    BOOST_PYTHON_MODULE(hello)
+    {
+        def("greet", greet, "return one of 3 parts of a greeting");
+    }
+
+and here it is in action::
+
+    >>> import hello
+    >>> for x in range(3):
+    ...     print hello.greet(x)
+    ...
+    hello
+    Boost.Python
+    world!
+
+Aside from the fact that the 'C' API version is much more verbose than
+the BPL one, it's worth noting that it doesn't handle a few things
+correctly:
+
+* The original function accepts an unsigned integer, and the Python
+  'C' API only gives us a way of extracting signed integers. The
+  Boost.Python version will raise a Python exception if we try to pass
+  a negative number to ``hello.greet``, but the other one will proceed
+  to do whatever the C++ implementation does when converting an
+  negative integer to unsigned (usually wrapping to some very large
+  number), and pass the incorrect translation on to the wrapped
+  function.
+
+* That brings us to the second problem: if the C++ ``greet()``
+  function is called with a number greater than 2, it will throw an
+  exception.  Typically, if a C++ exception propagates across the
+  boundary with code generated by a 'C' compiler, it will cause a
+  crash.  As you can see in the first version, there's no C++
+  scaffolding there to prevent this from happening.  Functions wrapped
+  by Boost.Python automatically include an exception-handling layer
+  which protects Python users by translating unhandled C++ exceptions
+  into a corresponding Python exception.
+
+* A slightly more-subtle limitation is that the argument conversion
+  used in the Python 'C' API case can only get that integer ``x`` in
+  *one way*.  PyArg_ParseTuple can't convert Python ``long`` objects
+  (arbitrary-precision integers) which happen to fit in an ``unsigned
+  int`` but not in a ``signed long``, nor will it ever handle a
+  wrapped C++ class with a user-defined implicit ``operator unsigned
+  int()`` conversion.  The BPL's dynamic type conversion registry
+  allows users to add arbitrary conversion methods.
+
+==================
+ Library Overview
+==================
+
+This section outlines some of the library's major features.  Except as
+necessary to avoid confusion, details of library implementation are
+omitted.
+
+-------------------------------------------
+ The fundamental type-conversion mechanism
+-------------------------------------------
+
+XXX This needs to be rewritten.
+
+Every argument of every wrapped function requires some kind of
+extraction code to convert it from Python to C++.  Likewise, the
+function return value has to be converted from C++ to Python.
+Appropriate Python exceptions must be raised if the conversion fails.
+Argument and return types are part of the function's type, and much of
+this tedium can be relieved if the wrapping system can extract that
+information through  introspection.
+
+Passing a wrapped C++ derived class instance to a C++ function
+accepting a pointer or reference to a base class requires knowledge of
+the inheritance relationship and how to translate the address of a base
+class into that of a derived class.
+
+------------------
+ Exposing Classes
+------------------
+
+C++ classes and structs are exposed with a similarly-terse interface.
+Given::
+
+    struct World
+    {
+        void set(std::string msg) { this->msg = msg; }
+        std::string greet() { return msg; }
+        std::string msg;
+    };
+
+The following code will expose it in our extension module::
+    
+    #include <boost/python.hpp>
+    BOOST_PYTHON_MODULE(hello)
+    {
+        class_<World>("World")
+            .def("greet", &World::greet)
+            .def("set", &World::set)
+        ;
+    }
+
+Although this code has a certain pythonic familiarity, people
+sometimes find the syntax bit confusing because it doesn't look like
+most of the C++ code they're used to. All the same, this is just
+standard C++.  Because of their flexible syntax and operator
+overloading, C++ and Python are great for defining domain-specific
+(sub)languages
+(DSLs), and that's what we've done in BPL.  To break it down::
+
+    class_<World>("World")
+
+constructs an unnamed object of type ``class_<World>`` and passes
+``"World"`` to its constructor.  This creates a new-style Python class
+called ``World`` in the extension module, and associates it with the
+C++ type ``World`` in the BPL type conversion registry.  We might have
+also written::
+
+    class_<World> w("World");
+
+but that would've been more verbose, since we'd have to name ``w``
+again to invoke its ``def()`` member function::
+
+        w.def("greet", &World::greet)
+
+There's nothing special about the location of the dot for member
+access in the original example: C++ allows any amount of whitespace on
+either side of a token, and placing the dot at the beginning of each
+line allows us to chain as many successive calls to member functions
+as we like with a uniform syntax.  The other key fact that allows
+chaining is that ``class_<>`` member functions all return a reference
+to ``*this``.
+
+So the example is equivalent to::
+
+    class_<World> w("World");
+    w.def("greet", &World::greet);
+    w.def("set", &World::set);
+
+It's occasionally useful to be able to break down the components of a
+Boost.Python class wrapper in this way, but the rest of this paper
+will tend to stick to the terse syntax.
+
+For completeness, here's the wrapped class in use:
+
+>>> import hello
+>>> planet = hello.World()
+>>> planet.set('howdy')
+>>> planet.greet()
+'howdy'
+
+Constructors
+============
+
+Since our ``World`` class is just a plain ``struct``, it has an
+implicit no-argument (nullary) constructor.  Boost.Python exposes the
+nullary constructor by default, which is why we were able to write:
+
+>>> planet = hello.World()
+
+However, well-designed classes in any language may require constructor
+arguments in order to establish their invariants.  Unlike Python,
+where ``__init__`` is just a specially-named method, In C++
+constructors cannot be handled like ordinary member functions.  In
+particular, we can't take their address: ``&World::World`` is an
+error.  The library provides a different interface for specifying
+constructors.  Given::
+
+    struct World
+    {
+        World(std::string msg); // added constructor
+        ...
+
+we can modify our wrapping code as follows::
+
+    class_<World>("World", init<std::string>())
+        ...
+
+of course, a C++ class may have additional constructors, and we can
+expose those as well by passing more instances of ``init<...>`` to
+``def()``::
+
+    class_<World>("World", init<std::string>())
+        .def(init<double, double>())
+        ...
+
+Boost.Python allows wrapped functions, member functions, and
+constructors to be overloaded to mirror C++ overloading.
+
+Data Members and Properties
+===========================
+
+Any publicly-accessible data members in a C++ class can be easily
+exposed as either ``readonly`` or ``readwrite`` attributes::
+
+    class_<World>("World", init<std::string>())
+        .def_readonly("msg", &World::msg)
+        ...
+
+and can be used directly in Python:
+
+>>> planet = hello.World('howdy')
+>>> planet.msg
+'howdy'
+
+This does *not* result in adding attributes to the ``World`` instance
+``__dict__``, which can result in substantial memory savings when
+wrapping large data structures.  In fact, no instance ``__dict__``
+will be created at all unless attributes are explicitly added from
+Python.  BPL owes this capability to the new Python 2.2 type system,
+in particular the descriptor interface and ``property`` type.
+
+In C++, publicly-accessible data members are considered a sign of poor
+design because they break encapsulation, and style guides usually
+dictate the use of "getter" and "setter" functions instead.  In
+Python, however, ``__getattr__``, ``__setattr__``, and since 2.2,
+``property`` mean that attribute access is just one more
+well-encapsulated syntactic tool at the programmer's disposal.  BPL
+bridges this idiomatic gap by making Python ``property`` creation
+directly available to users.  So if ``msg`` were private, we could
+still expose it as attribute in Python as follows::
+
+    class_<World>("World", init<std::string>())
+        .add_property("msg", &World::greet, &World::set)
+        ...
+
+The example above mirrors the familiar usage of properties in Python
+2.2+:
+
+>>> class World(object):
+...     __init__(self, msg):
+...         self.__msg = msg
+...     def greet(self):
+...         return self.__msg
+...     def set(self, msg):
+...         self.__msg = msg
+...     msg = property(greet, set)
+
+Operators and Special Functions
+===============================
+
+The ability to write arithmetic operators for user-defined types that
+C++ and Python both allow the definition of has been a major factor in
+the popularity of both languages for scientific computing.  The
+success of packages like NumPy attests to the power of exposing
+operators in extension modules.  In this example we'll wrap a class
+representing a position in a large file::
+
+    class FilePos { /*...*/ };
+
+    // Linear offset
+    FilePos     operator+(FilePos, int);
+    FilePos     operator+(int, FilePos);
+    FilePos     operator-(FilePos, int);
+    
+    // Distance between two FilePos objects
+    int         operator-(FilePos, FilePos);
+
+    // Offset with assignment
+    FilePos&    operator+=(FilePos&, int);
+    FilePos&    operator-=(FilePos&, int);
+
+    // Comparison
+    bool        operator<(FilePos, FilePos);
+
+The wrapping code looks like this::
+
+    class_<FilePos>("FilePos")
+        .def(self + int())     // __add__
+        .def(int() + self)     // __radd__
+        .def(self - int())     // __sub__
+
+        .def(self - self)      // __sub__
+
+        .def(self += int())    // __iadd__
+        .def(self -= int())    // __isub__
+
+        .def(self < self);     // __lt__
+        ;
+
+The magic is performed using a simplified application of "expression
+templates" [VELD1995]_, a technique originally developed by for
+optimization of high-performance matrix algebra expressions.  The
+essence is that instead of performing the computation immediately,
+operators are overloaded to construct a type *representing* the
+computation.  In matrix algebra, dramatic optimizations are often
+available when the structure of an entire expression can be taken into
+account, rather than processing each operation "greedily".
+Boost.Python uses the same technique to build an appropriate Python
+callable object based on an expression involving ``self``, which is
+then added to the class.
+
+Inheritance
+===========
+
+C++ inheritance relationships can be represented to Boost.Python by adding
+an optional ``bases<...>`` argument to the ``class_<...>`` template
+parameter list as follows::
+
+     class_<Derived, bases<Base1,Base2> >("Derived")
+          ...
+
+This has two effects:  
+
+1. When the ``class_<...>`` is created, Python type objects
+   corresponding to ``Base1`` and ``Base2`` are looked up in the BPL
+   registry, and are used as bases for the new Python ``Derived`` type
+   object [#mi]_, so methods exposed for the Python ``Base1`` and
+   ``Base2`` types are automatically members of the ``Derived`` type.
+   Because the registry is global, this works correctly even if
+   ``Derived`` is exposed in a different module from either of its
+   bases.
+
+2. C++ conversions from ``Derived`` to its bases are added to the
+   Boost.Python registry.  Thus wrapped C++ methods expecting (a
+   pointer or reference to) an object of either base type can be
+   called with an object wrapping a ``Derived`` instance.  Wrapped
+   member functions of class ``T`` are treated as though they have an
+   implicit first argument of ``T&``, so these conversions are
+   necessary to allow the base class methods to be called for derived
+   objects.
+
+Of course it's possible to derive new Python classes from wrapped C++
+class instances.  Because Boost.Python uses the new-style class
+system, that works very much as for the Python built-in types.  There
+is one significant detail in which it differs: the built-in types
+generally establish their invariants in their ``__new__`` function, so
+that derived classes do not need to call ``__init__`` on the base
+class before invoking its methods :
+
+>>> class L(list):
+...      def __init__(self):
+...          pass
+...
+>>> L().reverse()
+>>> 
+
+Because C++ object construction is a one-step operation, C++ instance
+data cannot be constructed until the arguments are available, in the
+``__init__`` function:
+
+>>> class D(SomeBPLClass):
+...      def __init__(self):
+...          pass
+...
+>>> D().some_bpl_method()
+Traceback (most recent call last):
+  File "<stdin>", line 1, in ?
+TypeError: bad argument type for built-in operation
+
+This happened because Boost.Python couldn't find instance data of type
+``SomeBPLClass`` within the ``D`` instance; ``D``'s ``__init__``
+function masked construction of the base class.  It could be corrected
+by either removing ``D``'s ``__init__`` function or having it call
+``SomeBPLClass.__init__(...)`` explicitly.
+
+Virtual Functions
+=================
+
+Deriving new types in Python from extension classes is not very
+interesting unless they can be used polymorphically from C++.  In
+other words, Python method implementations should appear to override
+the implementation of C++ virtual functions when called *through base
+class pointers/references from C++*.  Since the only way to alter the
+behavior of a virtual function is to override it in a derived class,
+the user must build a special derived class to dispatch a polymorphic
+class' virtual functions::
+
+    //
+    // interface to wrap:
+    //
+    class Base
+    {
+     public:
+        virtual int f(std::string x) { return 42; }
+        virtual ~Base();
+    };
+
+    int calls_f(Base const& b, std::string x) { return b.f(x); }
+
+    //
+    // Wrapping Code
+    //
+
+    // Dispatcher class
+    struct BaseWrap : Base
+    {
+        // Store a pointer to the Python object
+        BaseWrap(PyObject* self_) : self(self_) {}
+        PyObject* self;
+
+        // Default implementation, for when f is not overridden
+        int f_default(std::string x) { return this->Base::f(x); }
+        // Dispatch implementation
+        int f(std::string x) { return call_method<int>(self, "f", x); }
+    };
+
+    ...
+        def("calls_f", calls_f);
+        class_<Base, BaseWrap>("Base")
+            .def("f", &Base::f, &BaseWrap::f_default)
+            ;
+
+Now here's some Python code which demonstrates:
+
+>>> class Derived(Base):
+...     def f(self, s):
+...          return len(s)
+...
+>>> calls_f(Base(), 'foo')
+42
+>>> calls_f(Derived(), 'forty-two')
+9
+
+Things to notice about the dispatcher class:
+
+* The key element which allows overriding in Python is the
+  ``call_method`` invocation, which uses the same global type
+  conversion registry as the C++ function wrapping does to convert its
+  arguments from C++ to Python and its return type from Python to C++.
+
+* Any constructor signatures you wish to wrap must be replicated with
+  an initial ``PyObject*`` argument
+
+* The dispatcher must store this argument so that it can be used to
+  invoke ``call_method``
+
+* The ``f_default`` member function is needed when the function being
+  exposed is not pure virtual; there's no other way ``Base::f`` can be
+  called on an object of type ``BaseWrap``, since it overrides ``f``.
+
+Admittedly, this formula is tedious to repeat, especially on a project
+with many polymorphic classes; that it is necessary reflects
+limitations in C++'s compile-time reflection capabilities.  Several
+efforts are underway to write front-ends for Boost.Python which can
+generate these dispatchers (and other wrapping code) automatically.
+If these are successful it will mark a move away from wrapping
+everything directly in pure C++ for many of our users.
+
+---------------
+ Serialization
+---------------
+
+*Serialization* is the process of converting objects in memory to a
+form that can be stored on disk or sent over a network connection. The
+serialized object (most often a plain string) can be retrieved and
+converted back to the original object. A good serialization system will
+automatically convert entire object hierarchies. Python's standard
+``pickle`` module is such a system.  It leverages the language's strong
+runtime introspection facilities for serializing practically arbitrary
+user-defined objects. With a few simple and unintrusive provisions this
+powerful machinery can be extended to also work for wrapped C++ objects.
+Here is an example::
+
+    #include <string>
+
+    struct World
+    {
+        World(std::string a_msg) : msg(a_msg) {}
+        std::string greet() const { return msg; }
+        std::string msg;
+    };
+
+    #include <boost/python.hpp>
+    using namespace boost::python;
+
+    struct World_picklers : pickle_suite
+    {
+      static tuple
+      getinitargs(World const& w) { return make_tuple(w.greet()); }
+    };
+
+    BOOST_PYTHON_MODULE(hello)
+    {
+        class_<World>("World", init<std::string>())
+            .def("greet", &World::greet)
+            .def_pickle(World_picklers())
+        ;
+    }
+
+Now let's create a ``World`` object and put it to rest on disk::
+
+    >>> import hello
+    >>> import pickle
+    >>> a_world = hello.World("howdy")
+    >>> pickle.dump(a_world, open("my_world", "w"))
+
+In a potentially *different script* on a potentially *different
+computer* with a potentially *different operating system*::
+
+    >>> import pickle
+    >>> resurrected_world = pickle.load(open("my_world", "r"))
+    >>> resurrected_world.greet()
+    'howdy'
+
+Of course the ``cPickle`` module can also be used for faster
+processing.
+
+Boost.Python's ``pickle_suite`` fully supports the ``pickle`` protocol
+defined in the standard Python documentation. There is a one-to-one
+correspondence between the standard pickling methods (``__getinitargs__``,
+``__getstate__``, ``__setstate__``) and the functions defined by the
+user in the class derived from ``pickle_suite`` (``getinitargs``,
+``getstate``, ``setstate``). The ``class_::def_pickle()`` member function
+is used to establish the Python bindings for all user-defined functions
+simultaneously. Correct signatures for these functions are enforced at
+compile time. Non-sensical combinations of the three pickle functions
+are also rejected at compile time. These measures are designed to
+help the user in avoiding obvious errors.
+
+Enabling serialization of more complex C++ objects requires a little
+more work than is shown in the example above. Fortunately the
+``object`` interface (see next section) greatly helps in keeping the
+code manageable.
+
+------------------
+ Object interface
+------------------
+
+Experienced extension module authors will be familiar with the 'C' view
+of Python objects, the ubiquitous ``PyObject*``. Most if not all Python
+'C' API functions involve ``PyObject*`` as arguments or return type.  A
+major complication is the raw reference counting interface presented to
+the 'C' programmer. E.g. some API functions return *new references* and
+others return *borrowed references*. It is up to the extension module
+writer to properly increment and decrement reference counts.  This
+quickly becomes cumbersome and error prone, especially if there are
+multiple execution paths.
+
+Boost.Python provides a type ``object`` which is essentially a high
+level wrapper around ``PyObject*``. ``object`` automates reference
+counting as much as possible. It also provides the facilities for
+converting arbitrary C++ types to Python objects and vice versa.
+This significantly reduces the learning effort for prospective
+extension module writers.
+
+Creating an ``object`` from any other type is extremely simple::
+
+    object o(3);
+
+``object`` has templated interactions with all other types, with
+automatic to-python conversions. It happens so naturally that it's
+easily overlooked.
+
+The ``extract<T>`` class template can be used to convert Python objects
+to C++ types::
+
+    double x = extract<double>(o);
+
+All registered user-defined conversions are automatically accessible
+through the ``object`` interface. With reference to the ``World`` class
+defined in previous examples::
+
+    object as_python_object(World("howdy"));
+    World back_as_c_plus_plus_object = extract<World>(as_python_object);
+
+If a C++ type cannot be converted to a Python object an appropriate
+exception is thrown at runtime.  Similarly, an appropriate exception is
+thrown if a C++ type cannot be extracted from a Python object.
+``extract<T>`` provides facilities for avoiding exceptions if this is
+desired.
+
+The ``object::attr()`` member function is available for accessing
+and manipulating attributes of Python objects. For example::
+
+    object planet(World());
+    planet.attr("set")("howdy");
+
+``planet.attr("set")`` returns a callable ``object``.  ``"howdy"`` is
+converted to a Python string object which is then passed as an argument
+to the ``set`` method.
+
+The ``object`` type is accompanied by a set of derived types
+that mirror the Python built-in types such as ``list``, ``dict``,
+``tuple``, etc. as much as possible. This enables convenient
+manipulation of these high-level types from C++::
+
+    dict d;
+    d["some"] = "thing";
+    d["lucky_number"] = 13;
+    list l = d.keys();
+
+This almost looks and works like regular Python code, but it is pure C++.
+
+=================
+ Thinking hybrid
+=================
+
+For many applications runtime performance considerations are very
+important. This is particularly true for most scientific applications.
+Often the performance considerations dictate the use of a compiled
+language for the core algorithms. Traditionally the decision to use a
+particular programming language is an exclusive one. Because of the
+practical and mental difficulties of combining different languages many
+systems are written in just one language. This is quite unfortunate
+because the price payed for runtime performance is typically a
+significant overhead due to static typing. For example, our experience
+shows that developing maintainable C++ code is typically much more
+time-consuming and requires much more hard-earned working experience
+than developing useful Python code. A related observation is that many
+compiled packages are augmented by some type of rudimentary scripting
+layer. These ad hoc solutions clearly show that many times a compiled
+language alone does not get the job done. On the other hand it is also
+clear that a pure Python implementation is too slow for numerically
+intensive production code.
+
+Boost.Python enables us to *think hybrid* when developing new
+applications. Python can be used for rapidly prototyping a
+new application. Python's ease of use and the large pool of standard
+libraries give us a head start on the way to a first working system. If
+necessary, the working procedure can be used to discover the
+rate-limiting algorithms. To maximize performance these can be
+reimplemented in C++, together with the Boost.Python bindings needed to
+tie them back into the existing higher-level procedure.
+
+Of course, this *top-down* approach is less attractive if it is clear
+from the start that many algorithms will eventually have to be
+implemented in a compiled language. Fortunately Boost.Python also
+enables us to pursue a *bottom-up* approach. We have used this approach
+very successfully in the development of a toolbox for scientific
+applications (scitbx) that we will describe elsewhere. The toolbox
+started out mainly as a library of C++ classes with Boost.Python
+bindings, and for a while the growth was mainly concentrated on the C++
+parts. However, as the toolbox is becoming more complete, more and more
+newly added functionality can be implemented in Python. We expect this
+trend to continue, as illustrated qualitatively in this figure:
+
+.. image:: python_cpp_mix.png
+
+This figure shows the ratio of newly added C++ and Python code over
+time as new algorithms are implemented. We expect this ratio to level
+out near 70% Python. The increasing ability to solve new problems
+mostly with the easy-to-use Python language rather than a necessarily
+more arcane statically typed language is the return on the investment
+of learning how to use Boost.Python. The ability to solve some problems
+entirely using only Python will enable a larger group of people to
+participate in the rapid development of new applications.
+
+=============
+ Conclusions
+=============
+
+The examples in this paper illustrate that Boost.Python enables
+seamless interoperability between C++ and Python. Importantly, this is
+achieved without introducing a third syntax: the Python/C++ interface
+definitions are written in pure C++. This avoids any problems with
+parsing the C++ code to be interfaced to Python, yet the interface
+definitions are concise and maintainable. Freed from most of the
+development-time penalties of crossing a language boundary, software
+designers can take full advantage of two rich and complimentary
+language environments. In practice it turns out that some things are
+very difficult to do with pure Python/C (e.g. an efficient array
+library with an intuitive interface in the compiled language) and
+others are very difficult to do with pure C++ (e.g. serialization).
+If one has the luxury of being able to design a software system as a
+hybrid system from the ground up there are many new ways of avoiding
+road blocks in one language or the other.
+
+.. I'm not ready to give up on all of this quite yet
+
+.. Perhaps one day we'll have a language with the simplicity and
+   expressive power of Python and the compile-time muscle of C++.  Being
+   able to take advantage of all of these facilities without paying the
+   mental and development-time penalties of crossing a language barrier
+   would bring enormous benefits.  Until then, interoperability tools
+   like Boost.Python can help lower the barrier and make the benefits of
+   both languages more accessible to both communities.
+
+===========
+ Footnotes
+===========
+
+.. [#mi] For hard-core new-style class/extension module writers it is
+   worth noting that the normal requirement that all extension classes
+   with data form a layout-compatible single-inheritance chain is
+   lifted for Boost.Python extension classes.  Clearly, either
+   ``Base1`` or ``Base2`` has to occupy a different offset in the
+   ``Derived`` class instance.  This is possible because the wrapped
+   part of BPL extension class instances is never assumed to have a
+   fixed offset within the wrapper.
+
+===========
+ Citations
+===========
+
+.. [VELD1995] T. Veldhuizen, "Expression Templates," C++ Report,
+   Vol. 7 No. 5 June 1995, pp. 26-31.
+   http://osl.iu.edu/~tveldhui/papers/Expression-Templates/exprtmpl.html

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doc/boost.css

@@ -0,0 +1,63 @@
+/* Copyright David Abrahams 2006. Distributed under the Boost
+   Software License, Version 1.0. (See accompanying 
+   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+*/
+H1
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+}
+.index
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@@ -1,44 +1,636 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      Building an Extension Module
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="center"
-        src="../../../c++boost.gif" alt= "c++boost.gif (8819 bytes)">Building an Extension Module
-      </h1>
-      <p>
-         Right now, the only supported configuration is one in which the BPL
-         source files are statically linked with the source for your extension
-         module. You may first build them into a library and link it with your
-         extension module source, but the effect is the same as compiling all
-         the source files together. Some users have successfully built the
-         sources into a shared library, and support for a shared library
-         build is planned, but not yet implemented. The BPL source files are:
-<blockquote>
-<pre>
-<a href="../../../libs/python/src/extension_class.cpp">extclass.cpp</a>
-<a href="../../../libs/python/src/functions.cpp">functions.cpp</a>
-<a href="../../../libs/python/src/init_function.cpp">init_function.cpp</a>
-<a href="../../../libs/python/src/module_builder.cpp">module.cpp</a>
-<a href="../../../libs/python/src/types.cpp">newtypes.cpp</a>
-<a href="../../../libs/python/src/objects.cpp">objects.cpp</a>
-<a href="../../../libs/python/src/conversions.cpp">py.cpp</a>
-<a href="../../../libs/python/src/classes.cpp">subclass.cpp</a>
-         </pre>
-         </blockquote>
-               <p>
-         Next: <a href="enums.html">Enums</a>
-         Previous: <a href="under-the-hood.html">A Peek Under the Hood</a>
-         Up: <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided ``as
-        is'' without express or implied warranty, and with no claim as to
-        its suitability for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+<meta name="generator" content="Docutils 0.5: http://docutils.sourceforge.net/" />
+<title>Boost C++ Libraries: Boost.Python Build and Test HOWTO</title>
+<link rel="stylesheet" href="../../../rst.css" type="text/css" />
+</head>
+<body>
+<div class="document" id="logo-boost-python-build-and-test-howto">
+<h1 class="title"><a class="reference external" href="../index.html"><img alt="Boost C++ Libraries:" class="boost-logo" src="../../../boost.png" /></a> Boost.Python Build and Test HOWTO</h1>
 
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at -->
+<!-- http://www.boost.org/LICENSE_1_0.txt) -->
+<div class="contents sidebar small topic" id="contents">
+<p class="topic-title first">Contents</p>
+<ul class="auto-toc simple">
+<li><a class="reference internal" href="#requirements" id="id25">1&nbsp;&nbsp;&nbsp;Requirements</a></li>
+<li><a class="reference internal" href="#background" id="id26">2&nbsp;&nbsp;&nbsp;Background</a></li>
+<li><a class="reference internal" href="#no-install-quickstart" id="id27">3&nbsp;&nbsp;&nbsp;No-Install Quickstart</a><ul class="auto-toc">
+<li><a class="reference internal" href="#basic-procedure" id="id28">3.1&nbsp;&nbsp;&nbsp;Basic Procedure</a></li>
+<li><a class="reference internal" href="#in-case-of-trouble" id="id29">3.2&nbsp;&nbsp;&nbsp;In Case of Trouble</a></li>
+<li><a class="reference internal" href="#in-case-everything-seemed-to-work" id="id30">3.3&nbsp;&nbsp;&nbsp;In Case Everything Seemed to Work</a></li>
+<li><a class="reference internal" href="#modifying-the-example-project" id="id31">3.4&nbsp;&nbsp;&nbsp;Modifying the Example Project</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#installing-boost-python-on-your-system" id="id32">4&nbsp;&nbsp;&nbsp;Installing Boost.Python on your System</a></li>
+<li><a class="reference internal" href="#configuring-boost-build" id="id33">5&nbsp;&nbsp;&nbsp;Configuring Boost.Build</a><ul class="auto-toc">
+<li><a class="reference internal" href="#python-configuration-parameters" id="id34">5.1&nbsp;&nbsp;&nbsp;Python Configuration Parameters</a></li>
+<li><a class="reference internal" href="#examples" id="id35">5.2&nbsp;&nbsp;&nbsp;Examples</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#choosing-a-boost-python-library-binary" id="id36">6&nbsp;&nbsp;&nbsp;Choosing a Boost.Python Library Binary</a><ul class="auto-toc">
+<li><a class="reference internal" href="#the-dynamic-binary" id="id37">6.1&nbsp;&nbsp;&nbsp;The Dynamic Binary</a></li>
+<li><a class="reference internal" href="#the-static-binary" id="id38">6.2&nbsp;&nbsp;&nbsp;The Static Binary</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#include-issues" id="id39">7&nbsp;&nbsp;&nbsp;<tt class="docutils literal"><span class="pre">#include</span></tt> Issues</a></li>
+<li><a class="reference internal" href="#python-debugging-builds" id="id40">8&nbsp;&nbsp;&nbsp;Python Debugging Builds</a></li>
+<li><a class="reference internal" href="#testing-boost-python" id="id41">9&nbsp;&nbsp;&nbsp;Testing Boost.Python</a></li>
+<li><a class="reference internal" href="#notes-for-mingw-and-cygwin-with-mno-cygwin-gcc-users" id="id42">10&nbsp;&nbsp;&nbsp;Notes for MinGW (and Cygwin with -mno-cygwin) GCC Users</a></li>
+</ul>
+</div>
+<div class="section" id="requirements">
+<h1><a class="toc-backref" href="#id25">1&nbsp;&nbsp;&nbsp;Requirements</a></h1>
+<p>Boost.Python requires <a class="reference external" href="http://www.python.org/2.2">Python 2.2</a><a class="footnote-reference" href="#id22" id="id2"><sup>1</sup></a> <em>or</em> <a class="reference external" href="http://www.python.org"><em>newer</em></a>.</p>
+</div>
+<div class="section" id="background">
+<h1><a class="toc-backref" href="#id26">2&nbsp;&nbsp;&nbsp;Background</a></h1>
+<p>There are two basic models for combining C++ and Python:</p>
+<ul class="simple">
+<li><a class="reference external" href="http://www.python.org/doc/current/ext/intro.html">extending</a>, in which the end-user launches the Python interpreter
+executable and imports Python “extension modules” written in C++.
+Think of taking a library written in C++ and giving it a Python
+interface so Python programmers can use it.  From Python, these
+modules look just like regular Python modules.</li>
+<li><a class="reference external" href="http://www.python.org/doc/current/ext/embedding.html">embedding</a>, in which the end-user launches a program written
+in C++ that in turn invokes the Python interpreter as a library
+subroutine.  Think of adding scriptability to an existing
+application.</li>
+</ul>
+<p>The key distinction between extending and embedding is the location
+of the C++ <tt class="docutils literal"><span class="pre">main()</span></tt> function: in the Python interpreter executable,
+or in some other program, respectively.  Note that even when
+embedding Python in another program, <a class="reference external" href="http://www.python.org/doc/current/ext/extending-with-embedding.html">extension modules are often
+the best way to make C/C++ functionality accessible to Python
+code</a>, so the use of extension modules is really at the heart of
+both models.</p>
+<p>Except in rare cases, extension modules are built as
+dynamically-loaded libraries with a single entry point, which means
+you can change them without rebuilding either the other extension
+modules or the executable containing <tt class="docutils literal"><span class="pre">main()</span></tt>.</p>
+</div>
+<div class="section" id="no-install-quickstart">
+<span id="quickstart"></span><h1><a class="toc-backref" href="#id27">3&nbsp;&nbsp;&nbsp;No-Install Quickstart</a></h1>
+<p>There is no need to “install Boost” in order to get started using
+Boost.Python.  These instructions use <a class="reference external" href="../../../tools/build/index.html">Boost.Build</a> projects,
+which will build those binaries as soon as they're needed.  Your
+first tests may take a little longer while you wait for
+Boost.Python to build, but doing things this way will save you from
+worrying about build intricacies like which library binaries to use
+for a specific compiler configuration and figuring out the right
+compiler options to use yourself.</p>
+<!-- .. raw:: html
+
+<div style="width:50%"> -->
+<div class="note">
+<p class="first admonition-title">Note</p>
+<p>Of course it's possible to use other build systems to
+build Boost.Python and its extensions, but they are not
+officially supported by Boost.  Moreover <strong>99% of all “I can't
+build Boost.Python” problems come from trying to use another
+build system</strong> without first following these instructions.</p>
+<p>If you want to use another system anyway, we suggest that you
+follow these instructions, and then invoke <tt class="docutils literal"><span class="pre">bjam</span></tt> with the</p>
+<pre class="literal-block">
+<tt class="docutils literal"><span class="pre">-a</span> <span class="pre">-o</span></tt><em>filename</em>
+</pre>
+<p class="last">options to dump the build commands it executes to a file, so
+you can see what your alternate build system needs to do.</p>
+</div>
+<!-- .. raw:: html
+
+</div> -->
+<div class="section" id="basic-procedure">
+<h2><a class="toc-backref" href="#id28">3.1&nbsp;&nbsp;&nbsp;Basic Procedure</a></h2>
+<ol class="arabic">
+<li><p class="first">Get Boost; see sections 1 and 2 [<a class="reference external" href="../../../more/getting_started/unix-variants.html#get-boost">Unix/Linux</a>, <a class="reference external" href="../../../more/getting_started/windows.html#get-boost">Windows</a>] of the
+Boost <a class="reference external" href="../../../more/getting_started/index.html">Getting Started Guide</a>.</p>
+</li>
+<li><p class="first">Get the <tt class="docutils literal"><span class="pre">bjam</span></tt> build driver.  See section 5 [<a class="reference external" href="../../../more/getting_started/unix-variants.html#prepare-to-use-a-boost-library-binary">Unix/Linux</a>,
+<a class="reference external" href="../../../more/getting_started/windows.html#prepare-to-use-a-boost-library-binary">Windows</a>] of the Boost <a class="reference external" href="../../../more/getting_started/index.html">Getting Started Guide</a>.</p>
+</li>
+<li><p class="first">cd into the <tt class="docutils literal"><span class="pre">libs/python/example/quickstart/</span></tt> directory of your
+Boost installation, which contains a small example project.</p>
+</li>
+<li><p class="first">Invoke <tt class="docutils literal"><span class="pre">bjam</span></tt>.  Replace the “<tt class="docutils literal"><span class="pre">stage</span></tt>“ argument from the
+example invocation from section 5 of the <a class="reference external" href="../../../more/getting_started/index.html">Getting Started
+Guide</a> with “<tt class="docutils literal"><span class="pre">test</span></tt>,“ to build all the test targets.  Also add
+the argument “<tt class="docutils literal"><span class="pre">--verbose-test</span></tt>” to see the output generated by
+the tests when they are run.</p>
+<p>On Windows, your <tt class="docutils literal"><span class="pre">bjam</span></tt> invocation might look something like:</p>
+<pre class="literal-block">
+C:\boost_1_34_0\…\quickstart&gt; <strong>bjam toolset=msvc --verbose-test test</strong>
+</pre>
+<p>and on Unix variants, perhaps,</p>
+<pre class="literal-block">
+~/boost_1_34_0/…/quickstart$ <strong>bjam toolset=gcc --verbose-test test</strong>
+</pre>
+</li>
+</ol>
+<div class="admonition-note-to-windows-users admonition">
+<p class="first admonition-title">Note to Windows Users</p>
+<p class="last">For the sake of concision, the rest of this guide will use
+unix-style forward slashes in pathnames instead of the
+backslashes with which you may be more familiar.  The forward
+slashes should work everywhere except in <a class="reference external" href="../../../more/getting_started/windows.html#command-prompt">Command Prompt</a>
+windows, where you should use backslashes.</p>
+</div>
+<p>If you followed this procedure successfully, you will have built an
+extension module called <tt class="docutils literal"><span class="pre">extending</span></tt> and tested it by running a
+Python script called <tt class="docutils literal"><span class="pre">test_extending.py</span></tt>.  You will also have
+built and run a simple application called <tt class="docutils literal"><span class="pre">embedding</span></tt> that embeds
+python.</p>
+</div>
+<div class="section" id="in-case-of-trouble">
+<h2><a class="toc-backref" href="#id29">3.2&nbsp;&nbsp;&nbsp;In Case of Trouble</a></h2>
+<p>If you're seeing lots of compiler and/or linker error messages,
+it's probably because Boost.Build is having trouble finding your
+Python installation.  You might want to pass the
+<tt class="docutils literal"><span class="pre">--debug-configuration</span></tt> option to <tt class="docutils literal"><span class="pre">bjam</span></tt> the first few times
+you invoke it, to make sure that Boost.Build is correctly locating
+all the parts of your Python installation.  If it isn't, consider
+<a class="reference internal" href="#configuring-boost-build">Configuring Boost.Build</a> as detailed below.</p>
+<p>If you're still having trouble, Someone on one of the following
+mailing lists may be able to help:</p>
+<ul class="simple">
+<li>The <a class="reference external" href="http://www.boost.org/more/mailing_lists.htm#jamboost">Boost.Build mailing list</a> for issues related to Boost.Build</li>
+<li>The Python <a class="reference external" href="http://www.boost.org/more/mailing_lists.htm#cplussig">C++ Sig</a> for issues specifically related to Boost.Python</li>
+</ul>
+</div>
+<div class="section" id="in-case-everything-seemed-to-work">
+<h2><a class="toc-backref" href="#id30">3.3&nbsp;&nbsp;&nbsp;In Case Everything Seemed to Work</a></h2>
+<p>Rejoice!  If you're new to Boost.Python, at this point it might be
+a good idea to ignore build issues for a while and concentrate on
+learning the library by going through the <a class="reference external" href="tutorial/index.html">tutorial</a> and perhaps
+some of the <a class="reference external" href="v2/reference.html">reference documentation</a>, trying out what you've
+learned about the API by modifying the quickstart project.</p>
+</div>
+<div class="section" id="modifying-the-example-project">
+<h2><a class="toc-backref" href="#id31">3.4&nbsp;&nbsp;&nbsp;Modifying the Example Project</a></h2>
+<p>If you're content to keep your extension module forever in one
+source file called <a class="reference external" href="../example/quickstart/extending.cpp"><tt class="docutils literal"><span class="pre">extending.cpp</span></tt></a>, inside your Boost
+distribution, and import it forever as <tt class="docutils literal"><span class="pre">extending</span></tt>, then you can
+stop here.  However, it's likely that you will want to make a few
+changes.  There are a few things you can do without having to learn
+<a class="reference external" href="../../../tools/build/index.html">Boost.Build</a> in depth.</p>
+<p>The project you just built is specified in two files in the current
+directory: <a class="reference external" href="../example/quickstart/boost-build.jam"><tt class="docutils literal"><span class="pre">boost-build.jam</span></tt></a>, which tells <tt class="docutils literal"><span class="pre">bjam</span></tt> where it can
+find the interpreted code of the Boost build system, and
+<a class="reference external" href="../example/quickstart/Jamroot"><tt class="docutils literal"><span class="pre">Jamroot</span></tt></a>, which describes the targets you just built.  These
+files are heavily commented, so they should be easy to modify.
+Take care, however, to preserve whitespace.  Punctuation such as
+<tt class="docutils literal"><span class="pre">;</span></tt> will not be recognized as intended by <tt class="docutils literal"><span class="pre">bjam</span></tt> if it is not
+surrounded by whitespace.</p>
+<div class="section" id="relocate-the-project">
+<h3>Relocate the Project</h3>
+<p>You'll probably want to copy this project elsewhere so you can
+change it without modifying your Boost distribution.  To do that,
+simply</p>
+<ol class="loweralpha simple">
+<li>copy the entire <tt class="docutils literal"><span class="pre">libs/python/example/quickstart/</span></tt> directory
+into a new directory.</li>
+<li>In the new copies of <a class="reference external" href="../example/quickstart/boost-build.jam"><tt class="docutils literal"><span class="pre">boost-build.jam</span></tt></a> and <a class="reference external" href="../example/quickstart/Jamroot"><tt class="docutils literal"><span class="pre">Jamroot</span></tt></a>, locate
+the relative path near the top of the file that is clearly
+marked by a comment, and edit that path so that it refers to the
+same directory your Boost distribution as it referred to when
+the file was in its original location in the
+<tt class="docutils literal"><span class="pre">libs/python/example/quickstart/</span></tt> directory.</li>
+</ol>
+<p>For example, if you moved the project from
+<tt class="docutils literal"><span class="pre">/home/dave/boost_1_34_0/libs/python/example/quickstart</span></tt> to
+<tt class="docutils literal"><span class="pre">/home/dave/my-project</span></tt>, you could change the first path in
+<a class="reference external" href="../example/quickstart/boost-build.jam"><tt class="docutils literal"><span class="pre">boost-build.jam</span></tt></a> from</p>
+<pre class="literal-block">
+<strong>../../../..</strong>/tools/build/v2
+</pre>
+<p>to</p>
+<pre class="literal-block">
+<strong>/home/dave/boost_1_34_0</strong>/tools/build/v2
+</pre>
+<p>and change the first path in <a class="reference external" href="../example/quickstart/Jamroot"><tt class="docutils literal"><span class="pre">Jamroot</span></tt></a> from</p>
+<pre class="literal-block">
+<strong>../../../..</strong>
+</pre>
+<p>to</p>
+<pre class="literal-block">
+<strong>/home/dave/boost_1_34_0</strong>
+</pre>
+</div>
+<div class="section" id="add-new-or-change-names-of-existing-source-files">
+<h3>Add New or Change Names of Existing Source Files</h3>
+<p>The names of additional source files involved in building your
+extension module or embedding application can be listed in
+<a class="reference external" href="../example/quickstart/Jamroot"><tt class="docutils literal"><span class="pre">Jamroot</span></tt></a> right alongside <tt class="docutils literal"><span class="pre">extending.cpp</span></tt> or <tt class="docutils literal"><span class="pre">embedding.cpp</span></tt>
+respectively.  Just be sure to leave whitespace around each
+filename:</p>
+<pre class="literal-block">
+… file1.cpp file2.cpp file3.cpp …
+</pre>
+<p>Naturally, if you want to change the name of a source file you can
+tell Boost.Build about it by editing the name in <a class="reference external" href="../example/quickstart/Jamroot"><tt class="docutils literal"><span class="pre">Jamroot</span></tt></a>.</p>
+</div>
+<div class="section" id="change-the-name-of-your-extension-module">
+<h3>Change the Name of your Extension Module</h3>
+<p>The name of the extension module is determined by two things:</p>
+<ol class="arabic simple">
+<li>the name in <a class="reference external" href="../example/quickstart/Jamroot"><tt class="docutils literal"><span class="pre">Jamroot</span></tt></a> immediately following <tt class="docutils literal"><span class="pre">python-extension</span></tt>, and</li>
+<li>the name passed to <tt class="docutils literal"><span class="pre">BOOST_PYTHON_MODULE</span></tt> in <a class="reference external" href="../example/quickstart/extending.cpp"><tt class="docutils literal"><span class="pre">extending.cpp</span></tt></a>.</li>
+</ol>
+<p>To change the name of the extension module from <tt class="docutils literal"><span class="pre">extending</span></tt> to
+<tt class="docutils literal"><span class="pre">hello</span></tt>, you'd edit <a class="reference external" href="../example/quickstart/Jamroot"><tt class="docutils literal"><span class="pre">Jamroot</span></tt></a>, changing</p>
+<pre class="literal-block">
+python-extension <strong>extending</strong> : extending.cpp ;
+</pre>
+<p>to</p>
+<pre class="literal-block">
+python-extension <strong>hello</strong> : extending.cpp ;
+</pre>
+<p>and you'd edit extending.cpp, changing</p>
+<pre class="literal-block">
+BOOST_PYTHON_MODULE(<strong>extending</strong>)
+</pre>
+<p>to</p>
+<pre class="literal-block">
+BOOST_PYTHON_MODULE(<strong>hello</strong>)
+</pre>
+</div>
+</div>
+</div>
+<div class="section" id="installing-boost-python-on-your-system">
+<h1><a class="toc-backref" href="#id32">4&nbsp;&nbsp;&nbsp;Installing Boost.Python on your System</a></h1>
+<p>Since Boost.Python is a separately-compiled (as opposed to
+<a class="reference external" href="../../../more/getting_started/windows.html#header-only-libraries">header-only</a>) library, its user relies on the services of a
+Boost.Python library binary.</p>
+<p>If you need a regular installation of the Boost.Python library
+binaries on your system, the Boost <a class="reference external" href="../../../more/getting_started/index.html">Getting Started Guide</a> will
+walk you through the steps of creating one.  If building binaries
+from source, you might want to supply the <tt class="docutils literal"><span class="pre">--with-python</span></tt>
+argument to <tt class="docutils literal"><span class="pre">bjam</span></tt> (or the <tt class="docutils literal"><span class="pre">--with-libraries=python</span></tt> argument
+to <tt class="docutils literal"><span class="pre">configure</span></tt>), so only the Boost.Python binary will be built,
+rather than all the Boost binaries.</p>
+</div>
+<div class="section" id="configuring-boost-build">
+<h1><a class="toc-backref" href="#id33">5&nbsp;&nbsp;&nbsp;Configuring Boost.Build</a></h1>
+<p>As described in the <a class="reference external" href="http://www.boost.orgdoc/html/bbv2/advanced.html#bbv2.advanced.configuration">Boost.Build reference manual</a>, a file called
+<tt class="docutils literal"><span class="pre">user-config.jam</span></tt> in your home directory<a class="footnote-reference" href="#home-dir" id="id11"><sup>6</sup></a> is used to
+specify the tools and libraries available to the build system. You
+may need to create or edit <tt class="docutils literal"><span class="pre">user-config.jam</span></tt> to tell Boost.Build
+how to invoke Python, <tt class="docutils literal"><span class="pre">#include</span></tt> its headers, and link with its
+libraries.</p>
+<div class="admonition-users-of-unix-variant-oses admonition">
+<p class="first admonition-title">Users of Unix-Variant OSes</p>
+<p class="last">If you are using a unix-variant OS and you ran Boost's
+<tt class="docutils literal"><span class="pre">configure</span></tt> script, it may have generated a
+<tt class="docutils literal"><span class="pre">user-config.jam</span></tt> for you.<a class="footnote-reference" href="#overwrite" id="id13"><sup>4</sup></a> If your <tt class="docutils literal"><span class="pre">configure</span></tt>/<tt class="docutils literal"><span class="pre">make</span></tt> sequence was successful and Boost.Python binaries
+were built, your <tt class="docutils literal"><span class="pre">user-config.jam</span></tt> file is probably already
+correct.</p>
+</div>
+<p>If you have one fairly “standard” python installation for your
+platform, you might not need to do anything special to describe it.  If
+you haven't configured python in <tt class="docutils literal"><span class="pre">user-config.jam</span></tt> (and you don't
+specify <tt class="docutils literal"><span class="pre">--without-python</span></tt> on the Boost.Build command line),
+Boost.Build will automatically execute the equivalent of</p>
+<pre class="literal-block">
+import toolset : using ;
+using python ;
+</pre>
+<p>which automatically looks for Python in the most likely places.
+However, that only happens when using the Boost.Python project file
+(e.g. when referred to by another project as in the <a class="reference internal" href="#quickstart">quickstart</a>
+method).  If instead you are linking against separately-compiled
+Boost.Python binaries, you should set up a <tt class="docutils literal"><span class="pre">user-config.jam</span></tt> file
+with at least the minimal incantation above.</p>
+<div class="section" id="python-configuration-parameters">
+<h2><a class="toc-backref" href="#id34">5.1&nbsp;&nbsp;&nbsp;Python Configuration Parameters</a></h2>
+<p>If you have several versions of Python installed, or Python is
+installed in an unusual way, you may want to supply any or all of
+the following optional parameters to <tt class="docutils literal"><span class="pre">using</span> <span class="pre">python</span></tt>.</p>
+<dl class="docutils">
+<dt>version</dt>
+<dd>the version of Python to use.  Should be in Major.Minor
+format, for example, <tt class="docutils literal"><span class="pre">2.3</span></tt>.  Do not include the subminor
+version (i.e. <em>not</em> <tt class="docutils literal"><span class="pre">2.5.1</span></tt>).  If you have multiple Python
+versions installed, the version will usually be the only
+configuration argument required.</dd>
+<dt>cmd-or-prefix</dt>
+<dd>preferably, a command that invokes a Python interpreter.
+Alternatively, the installation prefix for Python libraries and
+header files.  Only use the alternative formulation if there is
+no appropriate Python executable available.</dd>
+<dt>includes</dt>
+<dd>the <tt class="docutils literal"><span class="pre">#include</span></tt> paths for Python headers.  Normally the correct
+path(s) will be automatically deduced from <tt class="docutils literal"><span class="pre">version</span></tt> and/or
+<tt class="docutils literal"><span class="pre">cmd-or-prefix</span></tt>.</dd>
+<dt>libraries</dt>
+<dd>the path to Python library binaries.  On MacOS/Darwin,
+you can also pass the path of the Python framework.  Normally the
+correct path(s) will be automatically deduced from <tt class="docutils literal"><span class="pre">version</span></tt>
+and/or <tt class="docutils literal"><span class="pre">cmd-or-prefix</span></tt>.</dd>
+<dt>condition</dt>
+<dd>if specified, should be a set of Boost.Build
+properties that are matched against the build configuration when
+Boost.Build selects a Python configuration to use.  See examples
+below for details.</dd>
+<dt>extension-suffix</dt>
+<dd>A string to append to the name of extension
+modules before the true filename extension.  You almost certainly
+don't need to use this.  Usually this suffix is only used when
+targeting a Windows debug build of Python, and will be set
+automatically for you based on the value of the
+<a class="reference internal" href="#python-debugging"><tt class="docutils literal"><span class="pre">&lt;python-debugging&gt;</span></tt></a> feature.  However, at least one Linux
+distribution (Ubuntu Feisty Fawn) has a specially configured
+<a class="reference external" href="https://wiki.ubuntu.com/PyDbgBuilds">python-dbg</a> package that claims to use such a suffix.</dd>
+</dl>
+</div>
+<div class="section" id="examples">
+<h2><a class="toc-backref" href="#id35">5.2&nbsp;&nbsp;&nbsp;Examples</a></h2>
+<p>Note that in the examples below, case and <em>especially whitespace</em> are
+significant.</p>
+<ul>
+<li><p class="first">If you have both python 2.5 and python 2.4 installed,
+<tt class="docutils literal"><span class="pre">user-config.jam</span></tt> might contain:</p>
+<pre class="literal-block">
+using python : 2.5 ;  # Make both versions of Python available
+
+using python : 2.4 ;  # To build with python 2.4, add python=2.4
+                      # to your command line.
+</pre>
+<p>The first version configured (2.5) becomes the default.  To build
+against python 2.4, add <tt class="docutils literal"><span class="pre">python=2.4</span></tt> to the <tt class="docutils literal"><span class="pre">bjam</span></tt> command line.</p>
+</li>
+<li><p class="first">If you have python installed in an unusual location, you might
+supply the path to the interpreter in the <tt class="docutils literal"><span class="pre">cmd-or-prefix</span></tt>
+parameter:</p>
+<pre class="literal-block">
+using python : : /usr/local/python-2.6-beta/bin/python ;
+</pre>
+</li>
+<li><p class="first">If you have a separate build of Python for use with a particular
+toolset, you might supply that toolset in the <tt class="docutils literal"><span class="pre">condition</span></tt>
+parameter:</p>
+<pre class="literal-block">
+using python ;  # use for most toolsets
+
+# Use with Intel C++ toolset
+using python
+     : # version
+     : c:\\Devel\\Python-2.5-IntelBuild\\PCBuild\\python # cmd-or-prefix
+     : # includes
+     : # libraries
+     : &lt;toolset&gt;intel # condition
+     ;
+</pre>
+</li>
+<li><p class="first">If you have downloaded the Python sources and built both the
+normal and the “<a class="reference internal" href="#id19">python debugging</a>” builds from source on
+Windows, you might see:</p>
+<pre class="literal-block">
+using python : 2.5 : C:\\src\\Python-2.5\\PCBuild\\python ;
+using python : 2.5 : C:\\src\\Python-2.5\\PCBuild\\python_d
+  : # includes
+  : # libs
+  : &lt;python-debugging&gt;on ;
+</pre>
+</li>
+<li><p class="first">You can set up your user-config.jam so a bjam built under Windows
+can build/test both Windows and <a class="reference external" href="http://cygwin.com">Cygwin</a> python extensions.  Just pass
+<tt class="docutils literal"><span class="pre">&lt;target-os&gt;cygwin</span></tt> in the <tt class="docutils literal"><span class="pre">condition</span></tt> parameter
+for the cygwin python installation:</p>
+<pre class="literal-block">
+# windows installation
+using python ;
+
+# cygwin installation
+using python : : c:\\cygwin\\bin\\python2.5 : : : &lt;target-os&gt;cygwin ;
+</pre>
+<p>when you put target-os=cygwin in your build request, it should build
+with the cygwin version of python:<a class="footnote-reference" href="#flavor" id="id15"><sup>5</sup></a></p>
+<blockquote>
+<p>bjam target-os=cygwin toolset=gcc</p>
+</blockquote>
+<p>This is supposed to work the other way, too (targeting windows
+python with a <a class="reference external" href="http://cygwin.com">Cygwin</a> bjam) but it seems as though the support in
+Boost.Build's toolsets for building that way is broken at the
+time of this writing.</p>
+</li>
+<li><p class="first">Note that because of <a class="reference external" href="http://zigzag.cs.msu.su/boost.build/wiki/AlternativeSelection">the way Boost.Build currently selects target
+alternatives</a>, you might have be very explicit in your build
+requests.  For example, given:</p>
+<pre class="literal-block">
+using python : 2.5 ; # a regular windows build
+using python : 2.4 : : : : &lt;target-os&gt;cygwin ;
+</pre>
+<p>building with</p>
+<pre class="literal-block">
+bjam target-os=cygwin
+</pre>
+<p>will yield an error.  Instead, you'll need to write:</p>
+<pre class="literal-block">
+bjam target-os=cygwin/python=2.4
+</pre>
+</li>
+</ul>
+</div>
+</div>
+<div class="section" id="choosing-a-boost-python-library-binary">
+<h1><a class="toc-backref" href="#id36">6&nbsp;&nbsp;&nbsp;Choosing a Boost.Python Library Binary</a></h1>
+<p>If—instead of letting Boost.Build construct and link with the right
+libraries automatically—you choose to use a pre-built Boost.Python
+library, you'll need to think about which one to link with.  The
+Boost.Python binary comes in both static and dynamic flavors.  Take
+care to choose the right flavor for your application.<a class="footnote-reference" href="#naming" id="id17"><sup>2</sup></a></p>
+<div class="section" id="the-dynamic-binary">
+<h2><a class="toc-backref" href="#id37">6.1&nbsp;&nbsp;&nbsp;The Dynamic Binary</a></h2>
+<p>The dynamic library is the safest and most-versatile choice:</p>
+<ul class="simple">
+<li>A single copy of the library code is used by all extension
+modules built with a given toolset.<a class="footnote-reference" href="#toolset-specific" id="id18"><sup>3</sup></a></li>
+<li>The library contains a type conversion registry.  Because one
+registry is shared among all extension modules, instances of a
+class exposed to Python in one dynamically-loaded extension
+module can be passed to functions exposed in another such module.</li>
+</ul>
+</div>
+<div class="section" id="the-static-binary">
+<h2><a class="toc-backref" href="#id38">6.2&nbsp;&nbsp;&nbsp;The Static Binary</a></h2>
+<p>It might be appropriate to use the static Boost.Python library in
+any of the following cases:</p>
+<ul class="simple">
+<li>You are <a class="reference external" href="http://www.python.org/doc/current/ext/intro.html">extending</a> python and the types exposed in your
+dynamically-loaded extension module don't need to be used by any
+other Boost.Python extension modules, and you don't care if the
+core library code is duplicated among them.</li>
+<li>You are <a class="reference external" href="http://www.python.org/doc/current/ext/embedding.html">embedding</a> python in your application and either:<ul>
+<li>You are targeting a Unix variant OS other than MacOS or AIX,
+where the dynamically-loaded extension modules can “see” the
+Boost.Python library symbols that are part of the executable.</li>
+<li>Or, you have statically linked some Boost.Python extension
+modules into your application and you don't care if any
+dynamically-loaded Boost.Python extension modules are able to
+use the types exposed by your statically-linked extension
+modules (and vice-versa).</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<div class="section" id="include-issues">
+<h1><a class="toc-backref" href="#id39">7&nbsp;&nbsp;&nbsp;<tt class="docutils literal"><span class="pre">#include</span></tt> Issues</a></h1>
+<ol class="arabic simple">
+<li>If you should ever have occasion to <tt class="docutils literal"><span class="pre">#include</span> <span class="pre">&quot;python.h&quot;</span></tt>
+directly in a translation unit of a program using Boost.Python,
+use <tt class="docutils literal"><span class="pre">#include</span> <span class="pre">&quot;boost/python/detail/wrap_python.hpp&quot;</span></tt> instead.
+It handles several issues necessary for use with Boost.Python,
+one of which is mentioned in the next section.</li>
+<li>Be sure not to <tt class="docutils literal"><span class="pre">#include</span></tt> any system headers before
+<tt class="docutils literal"><span class="pre">wrap_python.hpp</span></tt>.  This restriction is actually imposed by
+Python, or more properly, by Python's interaction with your
+operating system.  See
+<a class="reference external" href="http://docs.python.org/ext/simpleExample.html">http://docs.python.org/ext/simpleExample.html</a> for details.</li>
+</ol>
+</div>
+<div class="section" id="python-debugging-builds">
+<span id="id19"></span><span id="python-debugging"></span><h1><a class="toc-backref" href="#id40">8&nbsp;&nbsp;&nbsp;Python Debugging Builds</a></h1>
+<p>Python can be built in a special “python debugging” configuration
+that adds extra checks and instrumentation that can be very useful
+for developers of extension modules.  The data structures used by
+the debugging configuration contain additional members, so <strong>a
+Python executable built with python debugging enabled cannot be
+used with an extension module or library compiled without it, and
+vice-versa.</strong></p>
+<p>Since pre-built “python debugging” versions of the Python
+executable and libraries are not supplied with most distributions
+of Python,<a class="footnote-reference" href="#get-debug-build" id="id20"><sup>7</sup></a> and we didn't want to force our users
+to build them, Boost.Build does not automatically enable python
+debugging in its <tt class="docutils literal"><span class="pre">debug</span></tt> build variant (which is the default).
+Instead there is a special build property called
+<tt class="docutils literal"><span class="pre">python-debugging</span></tt> that, when used as a build property, will
+define the right preprocessor symbols and select the right
+libraries to link with.</p>
+<p>On unix-variant platforms, the debugging versions of Python's data
+structures will only be used if the symbol <tt class="docutils literal"><span class="pre">Py_DEBUG</span></tt> is defined.
+On many windows compilers, when extension modules are built with
+the preprocessor symbol <tt class="docutils literal"><span class="pre">_DEBUG</span></tt>, Python defaults to force
+linking with a special debugging version of the Python DLL.  Since
+that symbol is very commonly used even when Python is not present,
+Boost.Python temporarily undefines _DEBUG when Python.h
+is #included from <tt class="docutils literal"><span class="pre">boost/python/detail/wrap_python.hpp</span></tt> - unless
+<tt class="docutils literal"><span class="pre">BOOST_DEBUG_PYTHON</span></tt> is defined.  The upshot is that if you want
+“python debugging”and you aren't using Boost.Build, you should make
+sure <tt class="docutils literal"><span class="pre">BOOST_DEBUG_PYTHON</span></tt> is defined, or python debugging will be
+suppressed.</p>
+</div>
+<div class="section" id="testing-boost-python">
+<h1><a class="toc-backref" href="#id41">9&nbsp;&nbsp;&nbsp;Testing Boost.Python</a></h1>
+<p>To run the full test suite for Boost.Python, invoke <tt class="docutils literal"><span class="pre">bjam</span></tt> in the
+<tt class="docutils literal"><span class="pre">libs/python/test</span></tt> subdirectory of your Boost distribution.</p>
+</div>
+<div class="section" id="notes-for-mingw-and-cygwin-with-mno-cygwin-gcc-users">
+<h1><a class="toc-backref" href="#id42">10&nbsp;&nbsp;&nbsp;Notes for MinGW (and Cygwin with -mno-cygwin) GCC Users</a></h1>
+<p>If you are using a version of Python prior to 2.4.1 with a MinGW
+prior to 3.0.0 (with binutils-2.13.90-20030111-1), you will need to
+create a MinGW-compatible version of the Python library; the one
+shipped with Python will only work with a Microsoft-compatible
+linker. Follow the instructions in the “Non-Microsoft” section of
+the “Building Extensions: Tips And Tricks” chapter in <a class="reference external" href="http://www.python.org/doc/current/inst/index.html">Installing
+Python Modules</a> to create <tt class="docutils literal"><span class="pre">libpythonXX.a</span></tt>, where <tt class="docutils literal"><span class="pre">XX</span></tt>
+corresponds to the major and minor version numbers of your Python
+installation.</p>
+<hr class="docutils" />
+<table class="docutils footnote" frame="void" id="id22" rules="none">
+<colgroup><col class="label" /><col /></colgroup>
+<tbody valign="top">
+<tr><td class="label"><a class="fn-backref" href="#id2">[1]</a></td><td>Note that although we tested earlier versions of
+Boost.Python with Python 2.2, and we don't <em>think</em> we've done
+anything to break compatibility, this release of Boost.Python
+may not have been tested with versions of Python earlier than
+2.4, so we're not 100% sure that python 2.2 and 2.3 are
+supported.</td></tr>
+</tbody>
+</table>
+<table class="docutils footnote" frame="void" id="naming" rules="none">
+<colgroup><col class="label" /><col /></colgroup>
+<tbody valign="top">
+<tr><td class="label"><a class="fn-backref" href="#id17">[2]</a></td><td><p class="first">Information about how to identify the
+static and dynamic builds of Boost.Python:</p>
+<ul class="simple">
+<li><a class="reference external" href="../../../more/getting_started/windows.html#library-naming">on Windows</a></li>
+<li><a class="reference external" href="../../../more/getting_started/unix-variants.html#library-naming">on Unix variants</a></li>
+</ul>
+</td></tr>
+</tbody>
+</table>
+<table class="docutils footnote" frame="void" id="toolset-specific" rules="none">
+<colgroup><col class="label" /><col /></colgroup>
+<tbody valign="top">
+<tr><td class="label"><a class="fn-backref" href="#id18">[3]</a></td><td>Because of the way most *nix platforms
+share symbols among dynamically-loaded objects, I'm not certain
+that extension modules built with different compiler toolsets
+will always use different copies of the Boost.Python library
+when loaded into the same Python instance.  Not using different
+libraries could be a good thing if the compilers have compatible
+ABIs, because extension modules built with the two libraries
+would be interoperable.  Otherwise, it could spell disaster,
+since an extension module and the Boost.Python library would
+have different ideas of such things as class layout. I would
+appreciate someone doing the experiment to find out what
+happens.</td></tr>
+</tbody>
+</table>
+<table class="docutils footnote" frame="void" id="overwrite" rules="none">
+<colgroup><col class="label" /><col /></colgroup>
+<tbody valign="top">
+<tr><td class="label"><a class="fn-backref" href="#id13">[4]</a></td><td><tt class="docutils literal"><span class="pre">configure</span></tt> overwrites the existing
+<tt class="docutils literal"><span class="pre">user-config.jam</span></tt> in your home directory
+(if any) after making a backup of the old version.</td></tr>
+</tbody>
+</table>
+<table class="docutils footnote" frame="void" id="flavor" rules="none">
+<colgroup><col class="label" /><col /></colgroup>
+<tbody valign="top">
+<tr><td class="label"><a class="fn-backref" href="#id15">[5]</a></td><td>Note that the <tt class="docutils literal"><span class="pre">&lt;target-os&gt;cygwin</span></tt> feature is
+different from the <tt class="docutils literal"><span class="pre">&lt;flavor&gt;cygwin</span></tt> subfeature of the <tt class="docutils literal"><span class="pre">gcc</span></tt>
+toolset, and you might need handle both explicitly if you also
+have a MinGW GCC installed.</td></tr>
+</tbody>
+</table>
+<table class="docutils footnote" frame="void" id="home-dir" rules="none">
+<colgroup><col class="label" /><col /></colgroup>
+<tbody valign="top">
+<tr><td class="label"><a class="fn-backref" href="#id11">[6]</a></td><td><p class="first">Windows users, your home directory can be
+found by typing:</p>
+<pre class="literal-block">
+ECHO %HOMEDRIVE%%HOMEPATH%
+</pre>
+<p class="last">into a <a class="reference external" href="../../../more/getting_started/windows.html#command-prompt">command prompt</a> window.</p>
+</td></tr>
+</tbody>
+</table>
+<table class="docutils footnote" frame="void" id="get-debug-build" rules="none">
+<colgroup><col class="label" /><col /></colgroup>
+<tbody valign="top">
+<tr><td class="label"><a class="fn-backref" href="#id20">[7]</a></td><td>On Unix and similar platforms, a debugging
+python and associated libraries are built by adding
+<tt class="docutils literal"><span class="pre">--with-pydebug</span></tt> when configuring the Python build. On
+Windows, the debugging version of Python is generated by
+the &quot;Win32 Debug&quot; target of the Visual Studio project in the
+PCBuild subdirectory of a full Python source code distribution.
+</td></tr>
+</tbody>
+</table>
+</div>
+</div>
+<div class="footer">
+<hr class="footer" />
+<a class="reference external" href="./building.rst">View document source</a>.
+Generated on: 2007-07-02 13:46 UTC.
+Generated by <a class="reference external" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference external" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
+
+</div>
+</body>
+</html>

doc/building.rst

@@ -0,0 +1,680 @@
+.. Copyright David Abrahams 2006. Distributed under the Boost
+.. Software License, Version 1.0. (See accompanying
+.. file LICENSE_1_0.txt or copy at
+.. http://www.boost.org/LICENSE_1_0.txt)
+
+==============================================
+ |(logo)|__ Boost.Python Build and Test HOWTO
+==============================================
+
+.. |(logo)| image:: ../../../boost.png
+   :alt: Boost C++ Libraries:
+   :class: boost-logo
+
+__ ../index.html
+
+
+.. section-numbering::
+   :depth: 2
+
+.. contents:: Contents
+   :depth: 2
+   :class: sidebar small
+
+.. |newer| replace:: *newer*
+
+Requirements
+============
+
+Boost.Python requires `Python 2.2`_ [#2.2]_ *or* |newer|__.  
+
+.. _Python 2.2: http://www.python.org/2.2
+__ http://www.python.org
+
+Background
+==========
+
+There are two basic models for combining C++ and Python:
+
+- extending_, in which the end-user launches the Python interpreter
+  executable and imports Python “extension modules” written in C++.
+  Think of taking a library written in C++ and giving it a Python
+  interface so Python programmers can use it.  From Python, these
+  modules look just like regular Python modules.
+
+- embedding_, in which the end-user launches a program written
+  in C++ that in turn invokes the Python interpreter as a library
+  subroutine.  Think of adding scriptability to an existing
+  application.
+
+.. _extending: http://www.python.org/doc/current/ext/intro.html
+.. _embedding: http://www.python.org/doc/current/ext/embedding.html
+
+The key distinction between extending and embedding is the location
+of the C++ ``main()`` function: in the Python interpreter executable,
+or in some other program, respectively.  Note that even when
+embedding Python in another program, `extension modules are often
+the best way to make C/C++ functionality accessible to Python
+code`__, so the use of extension modules is really at the heart of
+both models.
+
+__ http://www.python.org/doc/current/ext/extending-with-embedding.html
+
+Except in rare cases, extension modules are built as
+dynamically-loaded libraries with a single entry point, which means
+you can change them without rebuilding either the other extension
+modules or the executable containing ``main()``.
+
+.. _quickstart:
+
+No-Install Quickstart
+=====================
+
+There is no need to “install Boost” in order to get started using
+Boost.Python.  These instructions use Boost.Build_ projects,
+which will build those binaries as soon as they're needed.  Your
+first tests may take a little longer while you wait for
+Boost.Python to build, but doing things this way will save you from
+worrying about build intricacies like which library binaries to use
+for a specific compiler configuration and figuring out the right
+compiler options to use yourself.
+
+.. .. raw:: html
+
+   <div style="width:50%">
+
+.. Note:: Of course it's possible to use other build systems to
+   build Boost.Python and its extensions, but they are not
+   officially supported by Boost.  Moreover **99% of all “I can't
+   build Boost.Python” problems come from trying to use another
+   build system** without first following these instructions.
+
+   If you want to use another system anyway, we suggest that you
+   follow these instructions, and then invoke ``bjam`` with the
+
+   .. parsed-literal::
+
+     ``-a -o``\ *filename* 
+
+   options to dump the build commands it executes to a file, so
+   you can see what your alternate build system needs to do.
+
+.. .. raw:: html
+ 
+   </div>
+
+.. _Boost.Build: ../../../tools/build/index.html
+
+Basic Procedure
+---------------
+
+1. Get Boost; see sections 1 and 2 [`Unix/Linux`__, `Windows`__\ ] of the
+   Boost `Getting Started Guide`_.
+
+   __ ../../../more/getting_started/unix-variants.html#get-boost
+   __ ../../../more/getting_started/windows.html#get-boost
+
+2. Get the ``bjam`` build driver.  See section 5 [`Unix/Linux`__,
+   `Windows`__\ ] of the Boost `Getting Started Guide`_.
+
+   __ ../../../more/getting_started/unix-variants.html#prepare-to-use-a-boost-library-binary
+   __ ../../../more/getting_started/windows.html#prepare-to-use-a-boost-library-binary
+
+
+3. cd into the ``libs/python/example/quickstart/`` directory of your
+   Boost installation, which contains a small example project.
+
+4. Invoke ``bjam``.  Replace the “\ ``stage``\ “ argument from the
+   example invocation from section 5 of the `Getting Started
+   Guide`_ with “\ ``test``\ ,“ to build all the test targets.  Also add
+   the argument “\ ``--verbose-test``\ ” to see the output generated by
+   the tests when they are run.
+
+   On Windows, your ``bjam`` invocation might look something like:
+
+   .. parsed-literal::
+
+     C:\\boost_1_34_0\\…\\quickstart> **bjam toolset=msvc --verbose-test test**
+
+   and on Unix variants, perhaps,
+
+   .. parsed-literal::
+
+     ~/boost_1_34_0/…/quickstart$ **bjam toolset=gcc --verbose-test test**
+
+.. Admonition:: Note to Windows Users
+
+   For the sake of concision, the rest of this guide will use
+   unix-style forward slashes in pathnames instead of the
+   backslashes with which you may be more familiar.  The forward
+   slashes should work everywhere except in `Command Prompt`_
+   windows, where you should use backslashes.
+
+   .. _Command Prompt: ../../../more/getting_started/windows.html#command-prompt
+
+If you followed this procedure successfully, you will have built an
+extension module called ``extending`` and tested it by running a
+Python script called ``test_extending.py``.  You will also have
+built and run a simple application called ``embedding`` that embeds
+python.
+
+.. _Getting Started Guide: ../../../more/getting_started/index.html
+
+In Case of Trouble
+------------------
+
+If you're seeing lots of compiler and/or linker error messages,
+it's probably because Boost.Build is having trouble finding your
+Python installation.  You might want to pass the
+``--debug-configuration`` option to ``bjam`` the first few times
+you invoke it, to make sure that Boost.Build is correctly locating
+all the parts of your Python installation.  If it isn't, consider
+`Configuring Boost.Build`_ as detailed below.
+
+If you're still having trouble, Someone on one of the following
+mailing lists may be able to help:
+
+* The `Boost.Build mailing list`__ for issues related to Boost.Build
+* The Python `C++ Sig`__ for issues specifically related to Boost.Python
+
+__ http://www.boost.org/more/mailing_lists.htm#jamboost
+__ http://www.boost.org/more/mailing_lists.htm#cplussig
+
+In Case Everything Seemed to Work
+---------------------------------
+
+Rejoice!  If you're new to Boost.Python, at this point it might be
+a good idea to ignore build issues for a while and concentrate on
+learning the library by going through the tutorial_ and perhaps
+some of the `reference documentation`_, trying out what you've
+learned about the API by modifying the quickstart project.
+
+.. _reference documentation: v2/reference.html
+.. _tutorial: tutorial/index.html
+
+Modifying the Example Project
+-----------------------------
+
+If you're content to keep your extension module forever in one
+source file called |extending.cpp|_, inside your Boost
+distribution, and import it forever as ``extending``, then you can
+stop here.  However, it's likely that you will want to make a few
+changes.  There are a few things you can do without having to learn
+Boost.Build_ in depth.
+
+The project you just built is specified in two files in the current
+directory: |boost-build.jam|_, which tells ``bjam`` where it can
+find the interpreted code of the Boost build system, and
+|Jamroot|_, which describes the targets you just built.  These
+files are heavily commented, so they should be easy to modify.
+Take care, however, to preserve whitespace.  Punctuation such as
+``;`` will not be recognized as intended by ``bjam`` if it is not
+surrounded by whitespace.
+
+.. |boost-build.jam| replace:: ``boost-build.jam``
+.. _boost-build.jam: ../example/quickstart/boost-build.jam
+
+.. |Jamroot| replace:: ``Jamroot``
+.. _Jamroot: ../example/quickstart/Jamroot
+
+.. |extending.cpp| replace:: ``extending.cpp``
+.. _extending.cpp: ../example/quickstart/extending.cpp
+
+Relocate the Project
+....................
+
+You'll probably want to copy this project elsewhere so you can
+change it without modifying your Boost distribution.  To do that,
+simply
+
+a. copy the entire ``libs/python/example/quickstart/`` directory
+   into a new directory.
+
+b. In the new copies of |boost-build.jam|_ and |Jamroot|_, locate
+   the relative path near the top of the file that is clearly
+   marked by a comment, and edit that path so that it refers to the
+   same directory your Boost distribution as it referred to when
+   the file was in its original location in the
+   ``libs/python/example/quickstart/`` directory.
+
+For example, if you moved the project from
+``/home/dave/boost_1_34_0/libs/python/example/quickstart`` to
+``/home/dave/my-project``, you could change the first path in
+|boost-build.jam|_ from
+
+.. parsed-literal::
+
+  **../../../..**\ /tools/build/v2
+
+to
+
+.. parsed-literal::
+
+  **/home/dave/boost_1_34_0**\ /tools/build/v2
+
+and change the first path in |Jamroot|_ from
+
+.. parsed-literal::
+
+  **../../../..**
+
+to
+
+.. parsed-literal::
+
+  **/home/dave/boost_1_34_0**
+
+Add New or Change Names of Existing Source Files
+................................................
+
+The names of additional source files involved in building your
+extension module or embedding application can be listed in
+|Jamroot|_ right alongside ``extending.cpp`` or ``embedding.cpp``
+respectively.  Just be sure to leave whitespace around each
+filename::
+
+  … file1.cpp file2.cpp file3.cpp …
+
+Naturally, if you want to change the name of a source file you can
+tell Boost.Build about it by editing the name in |Jamroot|_.
+
+Change the Name of your Extension Module
+........................................
+
+The name of the extension module is determined by two things:
+
+1. the name in |Jamroot|_ immediately following ``python-extension``, and 
+2. the name passed to ``BOOST_PYTHON_MODULE`` in |extending.cpp|_.
+
+To change the name of the extension module from ``extending`` to
+``hello``, you'd edit |Jamroot|_, changing
+
+.. parsed-literal::
+
+  python-extension **extending** : extending.cpp ;
+
+to
+
+.. parsed-literal::
+
+  python-extension **hello** : extending.cpp ;
+
+and you'd edit extending.cpp, changing
+
+.. parsed-literal::
+
+  BOOST_PYTHON_MODULE(\ **extending**\ )
+
+to
+
+.. parsed-literal::
+
+  BOOST_PYTHON_MODULE(\ **hello**\ )
+
+Installing Boost.Python on your System
+======================================
+
+Since Boost.Python is a separately-compiled (as opposed to
+`header-only`_) library, its user relies on the services of a
+Boost.Python library binary.  
+
+.. _header-only: ../../../more/getting_started/windows.html#header-only-libraries
+
+If you need a regular installation of the Boost.Python library
+binaries on your system, the Boost `Getting Started Guide`_ will
+walk you through the steps of creating one.  If building binaries
+from source, you might want to supply the ``--with-python``
+argument to ``bjam`` (or the ``--with-libraries=python`` argument
+to ``configure``), so only the Boost.Python binary will be built,
+rather than all the Boost binaries.
+
+
+Configuring Boost.Build
+=======================
+
+As described in the `Boost.Build reference manual`__, a file called
+``user-config.jam`` in your home directory [#home-dir]_ is used to
+specify the tools and libraries available to the build system. You
+may need to create or edit ``user-config.jam`` to tell Boost.Build
+how to invoke Python, ``#include`` its headers, and link with its
+libraries.
+
+__ http://www.boost.orgdoc/html/bbv2/advanced.html#bbv2.advanced.configuration
+
+.. Admonition:: Users of Unix-Variant OSes
+
+   If you are using a unix-variant OS and you ran Boost's
+   ``configure`` script, it may have generated a
+   ``user-config.jam`` for you. [#overwrite]_ If your ``configure``\
+   /\ ``make`` sequence was successful and Boost.Python binaries
+   were built, your ``user-config.jam`` file is probably already
+   correct.
+
+If you have one fairly “standard” python installation for your
+platform, you might not need to do anything special to describe it.  If
+you haven't configured python in ``user-config.jam`` (and you don't
+specify ``--without-python`` on the Boost.Build command line),
+Boost.Build will automatically execute the equivalent of ::
+
+  import toolset : using ; 
+  using python ;
+
+which automatically looks for Python in the most likely places.
+However, that only happens when using the Boost.Python project file
+(e.g. when referred to by another project as in the quickstart_
+method).  If instead you are linking against separately-compiled
+Boost.Python binaries, you should set up a ``user-config.jam`` file
+with at least the minimal incantation above.
+
+Python Configuration Parameters
+-------------------------------
+
+If you have several versions of Python installed, or Python is
+installed in an unusual way, you may want to supply any or all of
+the following optional parameters to ``using python``.
+
+version
+  the version of Python to use.  Should be in Major.Minor
+  format, for example, ``2.3``.  Do not include the subminor
+  version (i.e. *not* ``2.5.1``).  If you have multiple Python
+  versions installed, the version will usually be the only
+  configuration argument required.
+
+cmd-or-prefix
+  preferably, a command that invokes a Python interpreter.
+  Alternatively, the installation prefix for Python libraries and
+  header files.  Only use the alternative formulation if there is
+  no appropriate Python executable available.
+
+includes
+  the ``#include`` paths for Python headers.  Normally the correct
+  path(s) will be automatically deduced from ``version`` and/or
+  ``cmd-or-prefix``.  
+
+libraries
+  the path to Python library binaries.  On MacOS/Darwin,
+  you can also pass the path of the Python framework.  Normally the
+  correct path(s) will be automatically deduced from ``version``
+  and/or ``cmd-or-prefix``. 
+
+condition
+  if specified, should be a set of Boost.Build
+  properties that are matched against the build configuration when
+  Boost.Build selects a Python configuration to use.  See examples
+  below for details.
+
+extension-suffix
+  A string to append to the name of extension
+  modules before the true filename extension.  You almost certainly
+  don't need to use this.  Usually this suffix is only used when
+  targeting a Windows debug build of Python, and will be set
+  automatically for you based on the value of the
+  |python-debugging|_ feature.  However, at least one Linux
+  distribution (Ubuntu Feisty Fawn) has a specially configured
+  `python-dbg`__ package that claims to use such a suffix.
+
+.. |python-debugging| replace:: ``<python-debugging>``
+
+__ https://wiki.ubuntu.com/PyDbgBuilds
+
+
+Examples
+--------
+
+Note that in the examples below, case and *especially whitespace* are
+significant.
+
+- If you have both python 2.5 and python 2.4 installed,
+  ``user-config.jam`` might contain::
+  
+    using python : 2.5 ;  # Make both versions of Python available 
+
+    using python : 2.4 ;  # To build with python 2.4, add python=2.4 
+                          # to your command line.
+
+  The first version configured (2.5) becomes the default.  To build
+  against python 2.4, add ``python=2.4`` to the ``bjam`` command line.
+
+- If you have python installed in an unusual location, you might
+  supply the path to the interpreter in the ``cmd-or-prefix``
+  parameter::
+
+    using python : : /usr/local/python-2.6-beta/bin/python ;
+
+- If you have a separate build of Python for use with a particular
+  toolset, you might supply that toolset in the ``condition``
+  parameter::
+
+    using python ;  # use for most toolsets
+    
+    # Use with Intel C++ toolset
+    using python 
+         : # version
+         : c:\\Devel\\Python-2.5-IntelBuild\\PCBuild\\python # cmd-or-prefix
+         : # includes
+         : # libraries
+         : <toolset>intel # condition
+         ;
+
+
+- If you have downloaded the Python sources and built both the
+  normal and the “\ `python debugging`_\ ” builds from source on
+  Windows, you might see::
+
+    using python : 2.5 : C:\\src\\Python-2.5\\PCBuild\\python ;
+    using python : 2.5 : C:\\src\\Python-2.5\\PCBuild\\python_d
+      : # includes
+      : # libs
+      : <python-debugging>on ;
+
+- You can set up your user-config.jam so a bjam built under Windows 
+  can build/test both Windows and Cygwin_ python extensions.  Just pass
+  ``<target-os>cygwin`` in the ``condition`` parameter
+  for the cygwin python installation::
+
+    # windows installation
+    using python ;
+
+    # cygwin installation
+    using python : : c:\\cygwin\\bin\\python2.5 : : : <target-os>cygwin ;
+
+  when you put target-os=cygwin in your build request, it should build
+  with the cygwin version of python: [#flavor]_
+
+    bjam target-os=cygwin toolset=gcc 
+
+  This is supposed to work the other way, too (targeting windows
+  python with a Cygwin_ bjam) but it seems as though the support in
+  Boost.Build's toolsets for building that way is broken at the
+  time of this writing.
+
+- Note that because of `the way Boost.Build currently selects target
+  alternatives`__, you might have be very explicit in your build
+  requests.  For example, given::
+
+    using python : 2.5 ; # a regular windows build
+    using python : 2.4 : : : : <target-os>cygwin ;
+
+  building with ::
+
+    bjam target-os=cygwin
+
+  will yield an error.  Instead, you'll need to write::
+
+    bjam target-os=cygwin/python=2.4
+
+.. _Cygwin: http://cygwin.com
+
+__ http://zigzag.cs.msu.su/boost.build/wiki/AlternativeSelection
+
+Choosing a Boost.Python Library Binary
+======================================
+
+If—instead of letting Boost.Build construct and link with the right
+libraries automatically—you choose to use a pre-built Boost.Python
+library, you'll need to think about which one to link with.  The
+Boost.Python binary comes in both static and dynamic flavors.  Take
+care to choose the right flavor for your application. [#naming]_
+
+The Dynamic Binary
+------------------
+
+The dynamic library is the safest and most-versatile choice:
+
+- A single copy of the library code is used by all extension
+  modules built with a given toolset. [#toolset-specific]_
+
+- The library contains a type conversion registry.  Because one
+  registry is shared among all extension modules, instances of a
+  class exposed to Python in one dynamically-loaded extension
+  module can be passed to functions exposed in another such module.
+
+The Static Binary
+-----------------
+
+It might be appropriate to use the static Boost.Python library in
+any of the following cases:
+
+- You are extending_ python and the types exposed in your
+  dynamically-loaded extension module don't need to be used by any
+  other Boost.Python extension modules, and you don't care if the
+  core library code is duplicated among them.
+
+- You are embedding_ python in your application and either:
+
+  - You are targeting a Unix variant OS other than MacOS or AIX,
+    where the dynamically-loaded extension modules can “see” the
+    Boost.Python library symbols that are part of the executable.
+
+  - Or, you have statically linked some Boost.Python extension
+    modules into your application and you don't care if any
+    dynamically-loaded Boost.Python extension modules are able to
+    use the types exposed by your statically-linked extension
+    modules (and vice-versa).
+
+``#include`` Issues
+===================
+
+1. If you should ever have occasion to ``#include "python.h"``
+   directly in a translation unit of a program using Boost.Python,
+   use ``#include "boost/python/detail/wrap_python.hpp"`` instead.
+   It handles several issues necessary for use with Boost.Python,
+   one of which is mentioned in the next section.
+
+2. Be sure not to ``#include`` any system headers before
+   ``wrap_python.hpp``.  This restriction is actually imposed by
+   Python, or more properly, by Python's interaction with your
+   operating system.  See
+   http://docs.python.org/ext/simpleExample.html for details.
+
+.. _python-debugging:
+.. _python debugging:
+
+Python Debugging Builds
+=======================
+
+Python can be built in a special “python debugging” configuration
+that adds extra checks and instrumentation that can be very useful
+for developers of extension modules.  The data structures used by
+the debugging configuration contain additional members, so **a
+Python executable built with python debugging enabled cannot be
+used with an extension module or library compiled without it, and
+vice-versa.**
+
+Since pre-built “python debugging” versions of the Python
+executable and libraries are not supplied with most distributions
+of Python, [#get-debug-build]_ and we didn't want to force our users
+to build them, Boost.Build does not automatically enable python
+debugging in its ``debug`` build variant (which is the default).
+Instead there is a special build property called
+``python-debugging`` that, when used as a build property, will
+define the right preprocessor symbols and select the right
+libraries to link with.
+
+On unix-variant platforms, the debugging versions of Python's data
+structures will only be used if the symbol ``Py_DEBUG`` is defined.
+On many windows compilers, when extension modules are built with
+the preprocessor symbol ``_DEBUG``, Python defaults to force
+linking with a special debugging version of the Python DLL.  Since
+that symbol is very commonly used even when Python is not present,
+Boost.Python temporarily undefines _DEBUG when Python.h
+is #included from ``boost/python/detail/wrap_python.hpp`` - unless
+``BOOST_DEBUG_PYTHON`` is defined.  The upshot is that if you want
+“python debugging”and you aren't using Boost.Build, you should make
+sure ``BOOST_DEBUG_PYTHON`` is defined, or python debugging will be
+suppressed.
+
+Testing Boost.Python
+====================
+
+To run the full test suite for Boost.Python, invoke ``bjam`` in the
+``libs/python/test`` subdirectory of your Boost distribution.
+
+Notes for MinGW (and Cygwin with -mno-cygwin) GCC Users
+=======================================================
+
+If you are using a version of Python prior to 2.4.1 with a MinGW
+prior to 3.0.0 (with binutils-2.13.90-20030111-1), you will need to
+create a MinGW-compatible version of the Python library; the one
+shipped with Python will only work with a Microsoft-compatible
+linker. Follow the instructions in the “Non-Microsoft” section of
+the “Building Extensions: Tips And Tricks” chapter in `Installing
+Python Modules`__ to create ``libpythonXX.a``, where ``XX``
+corresponds to the major and minor version numbers of your Python
+installation.
+
+__ http://www.python.org/doc/current/inst/index.html
+
+-----------------------------
+
+.. [#2.2] Note that although we tested earlier versions of
+   Boost.Python with Python 2.2, and we don't *think* we've done
+   anything to break compatibility, this release of Boost.Python
+   may not have been tested with versions of Python earlier than
+   2.4, so we're not 100% sure that python 2.2 and 2.3 are
+   supported.
+
+.. [#naming] Information about how to identify the
+   static and dynamic builds of Boost.Python:
+
+   * `on Windows`__
+   * `on Unix variants`__
+
+   __ ../../../more/getting_started/windows.html#library-naming
+   __ ../../../more/getting_started/unix-variants.html#library-naming
+
+.. [#toolset-specific] Because of the way most \*nix platforms
+   share symbols among dynamically-loaded objects, I'm not certain
+   that extension modules built with different compiler toolsets
+   will always use different copies of the Boost.Python library
+   when loaded into the same Python instance.  Not using different
+   libraries could be a good thing if the compilers have compatible
+   ABIs, because extension modules built with the two libraries
+   would be interoperable.  Otherwise, it could spell disaster,
+   since an extension module and the Boost.Python library would
+   have different ideas of such things as class layout. I would
+   appreciate someone doing the experiment to find out what
+   happens.
+
+.. [#overwrite] ``configure`` overwrites the existing
+   ``user-config.jam`` in your home directory
+   (if any) after making a backup of the old version.
+
+.. [#flavor] Note that the ``<target-os>cygwin`` feature is
+   different from the ``<flavor>cygwin`` subfeature of the ``gcc``
+   toolset, and you might need handle both explicitly if you also
+   have a MinGW GCC installed.
+
+.. [#home-dir] Windows users, your home directory can be
+   found by typing::
+
+     ECHO %HOMEDRIVE%%HOMEPATH%
+
+   into a `command prompt`_ window.
+
+.. [#get-debug-build] On Unix and similar platforms, a debugging
+   python and associated libraries are built by adding
+   ``--with-pydebug`` when configuring the Python build. On
+   Windows, the debugging version of Python is generated by
+   the "Win32 Debug" target of the Visual Studio project in the
+   PCBuild subdirectory of a full Python source code distribution.

doc/comparisons.html

@@ -1,220 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      Comparisons with Other Systems
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="center"
-        src="../../../c++boost.gif" alt= "c++boost.gif (8819 bytes)">Comparisons with
-        Other Systems
-      </h1>
-      
-      <h2>CXX</h2>
-      <p>
-        Like BPL, <a href="http://cxx.sourceforge.net/">CXX</a> attempts to
-        provide a C++-oriented interface to Python. In most cases, as with the
-        boost library, it relieves the user from worrying about
-        reference-counts. Both libraries automatically convert thrown C++
-        exceptions into Python exceptions. As far as I can tell, CXX has no
-        support for subclassing C++ extension types in Python. An even
-        more significant difference is that a user's C++ code is still basically
-        ``dealing with Python objects'', though they are wrapped in
-        C++ classes. This means such jobs as argument parsing and conversion are
-        still left to be done explicitly by the user.
-
-     <p>
-        CXX claims to interoperate well with the C++ Standard Library
-        (a.k.a. STL) by providing iterators into Python Lists and Dictionaries,
-        but the claim is unfortunately unsupportable. The problem is that in
-        general, access to Python sequence and mapping elements through
-        iterators requires the use of proxy objects as the return value of
-        iterator dereference operations. This usage conflicts with the basic
-        ForwardIterator requirements in <a
-        href="http://anubis.dkuug.dk/jtc1/sc22/open/n2356/lib-iterators.html#lib.forward.iterators">
-        section 24.1.3 of the standard</a> (dereferencing must produce a
-        reference). Although you may be able to use these iterators with some
-        operations in some standard library implementations, it is neither
-        guaranteed to work nor portable.
-
-      <p>
-        As far as I can tell, CXX enables one to write what is essentially
-        idiomatic Python code in C++, manipulating Python objects through the
-        same fully-generic interfaces we use in Python. While you're hardly programming directly to the ``bare
-        metal'' with CXX, it basically presents a ``C++-ized''
-        version of the Python 'C' API.
-
-      <p>
-        <a href="mailto:dubois1@llnl.gov">Paul F. Dubois</a>, the original
-        author of CXX, has told me that what I've described is only half of the
-        picture with CXX, but I never understood his explanation well-enough to
-        fill in the other half. Here is his response to the commentary above:
-
-<blockquote>
-``My intention with CXX was not to do what you are doing. It was to enable a
-person to write an extension directly in C++ rather than C. I figured others had
-the wrapping business covered. I thought maybe CXX would provide an easier
-target language for those making wrappers, but I never explored
-that.''<br><i>-<a href="mailto:dubois1@llnl.gov">Paul Dubois</a></i>
-</blockquote>
-
-      <h2>SWIG</h2>
-      <p>
-        <a href= "http://www.swig.org/">SWIG</a> is an impressively mature tool
-        for exporting an existing ANSI 'C' interface into various scripting
-        languages. Swig relies on a parser to read your source code and produce
-        additional source code files which can be compiled into a Python (or
-        Perl or Tcl) extension module. It has been successfully used to create
-        many Python extension modules. Like BPL, SWIG is trying to allow an
-        existing interface to be wrapped with little or no change to the
-        existing code. The documentation says ``SWIG parses a form of ANSI C
-        syntax that has been extended with a number of special directives. As a
-        result, interfaces are usually built by grabbing a header file and
-        tweaking it a little bit.'' For C++ interfaces, the tweaking has often
-        proven to amount to more than just a little bit. One user
-        writes:
-
-        <blockquote> ``The problem with swig (when I used it) is that it
-        couldnt handle templates, didnt do func overloading properly etc.  For
-        ANSI C libraries this was fine.  But for usual C++ code this was a
-        problem.  Simple things work.  But for anything very complicated (or
-        realistic), one had to write code by hand.  I believe BPL doesn't have
-        this problem[<a href="#sic">sic</a>]...  IMHO overloaded functions are very important to
-        wrap correctly.''<br><i>-Prabhu Ramachandran</i>
-        </blockquote>
-        
-      <p>
-        By contrast, BPL doesn't attempt to parse C++ - the problem is simply
-        too complex to do correctly. <a name="sic">Technically</a>, one does
-        write code by hand to use BPL. The goal, however, has been to make
-        that code nearly as simple as listing the names of the classes and
-        member functions you want to expose in Python.
-
-      <h2>SIP</h2> 
-      <p>
-        <a
-        href="http://www.thekompany.com/projects/pykde/background.php3?dhtml_ok=1">SIP</a>
-        is a system similar to SWIG, though seemingly more
-        C++-oriented. The author says that like BPL, SIP supports overriding
-        extension class member functions in Python subclasses. It appears to
-        have been designed specifically to directly support some features of
-        PyQt/PyKDE, which is its primary client. Documentation is almost
-        entirely missing at the time of this writing, so a detailed comparison
-        is difficult.
-
-      <h2>ILU</h2>
-      <p>
-        <a
-        href="http://www.cl.cam.ac.uk/Research/Rainbow/projects/origami/ilu-1.8-manual">ILU</a>
-        is a very ambitious project which tries to describe a module's interface
-        (types and functions) in terms of an <a
-        href="http://www.cl.cam.ac.uk/Research/Rainbow/projects/origami/ilu-1.8-manual/manual_2.html">Interface
-        Specification Language</a> (ISL) so that it can be uniformly interfaced
-        to a wide range of computer languages, including Common Lisp, C++, C,
-        Modula-3, and Python. ILU can parse the ISL to generate a C++ language
-        header file describing the interface, of which the user is expected to
-        provide an implementation. Unlike BPL, this means that the system
-        imposes implementation details on your C++ code at the deepest level. It
-        is worth noting that some of the C++ names generated by ILU are supposed
-        to be reserved to the C++ implementation. It is unclear from the
-        documentation whether ILU supports overriding C++ virtual functions in Python.
-        
-      <h2>GRAD</h2>
-      <p>
-      <a
-      href="http://www.python.org/workshops/1996-11/papers/GRAD/html/GRADcover.html">GRAD</a>
-      is another very ambitious project aimed at generating Python wrappers for
-      interfaces written in ``legacy languages'', among which C++ is the first one
-      implemented. Like SWIG, it aims to parse source code and automatically
-      generate wrappers, though it appears to take a more sophisticated approach
-      to parsing in general and C++ in particular, so it should do a much better
-      job with C++. It appears to support function overloading. The
-      documentation is missing a lot of information I'd like to see, so it is
-      difficult to give an accurate and fair assessment. I am left with the
-      following questions:
-<ul>
-<li>Does it support overriding of virtual functions?
-<li>What about overriding private or protected virtual functions (the documentation indicates
-that only public interfaces are supported)?
-<li>Which C++ language constructs are supportd?
-<li>Does it support implicit conversions between wrapped C++ classes that have
-an inheritance relationship?
-<li>Does it support smart pointers?
-</ul>
-      <p>
-        Anyone in the possession of the answers to these questions will earn my
-        gratitude for a write-up <code>;-)</code>
-
-      <h2>Zope ExtensionClasses</h2>
-      <p>
-         <a href="http:http://www.digicool.com/releases/ExtensionClass">
-        ExtensionClasses in Zope</a> use the same underlying mechanism as BPL
-        to support subclassing of extension types in Python, including
-        multiple-inheritance. Both systems support pickling/unpickling of
-        extension class instances in very similar ways. Both systems rely on the
-        same ``<a
-        href="http://www.python.org/workshops/1994-11/BuiltInClasses/Welcome.html">Don
-        Beaudry Hack</a>'' that also inspired Don's MESS System.
-      <p>
-        The major differences are:
-      <ul>
-        <li>
-          BPL lifts the burden on the user to parse and convert function
-          argument types. Zope provides no such facility.
-        <li>
-          BPL lifts the burden on the user to maintain Python
-          reference-counts.
-        <li>
-          BPL supports function overloading; Zope does not.
-        <li>
-          BPL supplies a simple mechanism for exposing read-only and
-          read/write access to data members of the wrapped C++ type as Python
-          attributes.
-        <li>
-          Writing a Zope ExtensionClass is significantly more complex than
-          exposing a C++ class to python using BPL (mostly a summary of the
-          previous 4 items). <a href= 
-          "http://www.digicool.com/releases/ExtensionClass/MultiMapping.html">A
-          Zope Example</a> illustrates the differences.
-        <li>
-          Zope's ExtensionClasses are specifically motivated by ``the need for a
-          C-based persistence mechanism''. BPL's are motivated by the desire
-          to simply reflect a C++ API into Python with as little modification as
-          possible.
-        <li>
-          The following Zope restriction does not apply to BPL: ``At most one
-          base extension direct or indirect super class may define C data
-          members. If an extension subclass inherits from multiple base
-          extension classes, then all but one must be mix-in classes that
-          provide extension methods but no data.''
-        <li>
-          Zope requires use of the somewhat funky inheritedAttribute (search for
-          ``inheritedAttribute'' on <a
-          href="http://www.digicool.com/releases/ExtensionClass">this page</a>)
-          method to access base class methods. In BPL, base class methods can
-          be accessed in the usual way by writing
-          ``<code>BaseClass.method</code>''.
-        <li>
-          Zope supplies some creative but esoteric idioms such as <a href= 
-          "http://www.digicool.com/releases/ExtensionClass/Acquisition.html">
-          Acquisition</a>. No specific support for this is built into BPL.
-        <li>
-          Zope's ComputedAttribute support is designed to be used from Python.
-          <a href="special.html#getter_setter">The analogous feature of
-          BPL</a> can be used from C++ or Python. The feature is arguably
-          easier to use in BPL.
-      </ul>
-      <p>
-        Next: <a href="example1.html">A Simple Example Using BPL</a>
-        Previous: <a href="extending.html">A Brief Introduction to writing Python Extension Modules</a>
-        Up: <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided ``as is'' without
-        express or implied warranty, and with no claim as to its suitability
-        for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/data_structures.txt

@@ -1,192 +0,0 @@
-Given a real Python class 'A', a wrapped C++ class 'B', and this definition:
-
-    class C(A, B):
-        def __init__(self):
-            B.__init__(self)
-            self.x = 1
-        ...
-
-    c = C()
-
-this diagram describes the internal structure of an instance of 'C', including
-its inheritance relationships. Note that ExtensionClass<B> is derived from
-Class<ExtensionInstance>, and is in fact identical for all intents and purposes.
-
-                                           MetaClass<ExtensionInstance>
-                 +---------+              +---------+                  
-types.ClassType: |         |              |         |                  
-                 |         |              |         |                  
-                 |         |              |         |                  
-                 +---------+              +---------+                    
-                   ^                         ^   ^
-     PyClassObject |       ExtensionClass<B> |   |
- A: +------------+ |   B: +------------+     |   |
-    |  ob_type  -+-+      |   ob_type -+-----+   |
-    |            |   ()<--+- __bases__ |         |
-    |            |        |  __dict__ -+->{...}  |
-    |            |   'B'<-+- __name__  |         |
-    +------------+        +------------+         |
-         ^                      ^                |
-         |                      |                |
-         +-----+  +-------------+                |
-               |  |                              |
-               |  |     Class<ExtensionInstance> |
-               |  | C: +------------+            |
-               |  |    |   ob_type -+------------+
-        tuple:(*, *)<--+- __bases__ |           
-                       |  __dict__ -+->{__module__, <methods, etc.>}
-                 'C' <-+- __name__  |
-                       +------------+        
-                             ^           (in case of inheritance from more than one   
-                             |            extension class, this vector would contain  
-             +---------------+            a pointer to an instance holder for the data
-             |                            of each corresponding C++ class)            
-             |     ExtensionInstance                
-             | c: +---------------------+   std::vector<InstanceHolderBase> 
-             +----+- __class__          |  +---+--  
-                  |  m_wrapped_objects -+->| * | ...
-        {'x': 1}<-+- __dict__           |  +-|-+--   
-                  +---------------------+    |    InstanceValueHolder<B>                  
-                                             |   +--------------------------------+
-                                             +-->| (contains a C++ instance of B) |
-                                                 +--------------------------------+
-
-
-
-
-
-
-In our inheritance test cases in extclass_demo.cpp/test_extclass.py, we have the
-following C++ inheritance hierarchy:
-
-               +-----+          +----+
-               |  A1 |          | A2 |
-               +-----+          +----+
-                ^ ^ ^            ^  ^  
-                | | |            |  |
-          +-----+ | +---------+-----+
-          |       |           |  |
-          |       +---+----------+
-   .......!......     |       |
-   : A_callback :   +-+--+  +-+--+
-   :............:   | B1 |  | B2 |
-                    +----+  +----+
-                      ^
-                      |
-              +-------+---------+
-              |                 |
-            +-+-+         ......!.......
-            | C |         : B_callback :
-            +---+         :............:
-
-
-A_callback and B_callback are used as part of the wrapping mechanism but not
-represented in Python. C is also not represented in Python but is delivered
-there polymorphically through a smart pointer.
-
-This is the data structure in Python.
-
-       ExtensionClass<A1>
-  A1: +------------+                
- ()<--+- __bases__ |                                                
-      |  __dict__ -+->{...}                                         
-      +------------+                                                
-        ^                 
-        |          ExtensionInstance                                              
-        |     a1: +---------------------+   vec     InstanceValueHolder<A1,A_callback> 
-        +---------+- __class__          |  +---+   +---------------------+ 
-        |         |  m_wrapped_objects -+->| *-+-->| contains A_callback | 
-        |         +---------------------+  +---+   +---------------------+              
-        |   
-        |          ExtensionInstance                                              
-        | pa1_a1: +---------------------+   vec     InstancePtrHolder<auto_ptr<A1>,A1>
-        +---------+- __class__          |  +---+   +---+ 
-        |         |  m_wrapped_objects -+->| *-+-->| *-+-+   A1    
-        |         +---------------------+  +---+   +---+ |  +---+
-        |                                                +->|   |
-        |          ExtensionInstance                        +---+ 
-        | pb1_a1: +---------------------+   vec     InstancePtrHolder<auto_ptr<A1>,A1>
-        +---------+- __class__          |  +---+   +---+                 
-        |         |  m_wrapped_objects -+->| *-+-->| *-+-+   B1           
-        |         +---------------------+  +---+   +---+ |  +---+        
-        |                                                +->|   |                            
-        |          ExtensionInstance                        +---+                       
-        | pb2_a1: +---------------------+   vec     InstancePtrHolder<auto_ptr<A1>,A1>
-        +---------+- __class__          |  +---+   +---+                 
-        |         |  m_wrapped_objects -+->| *-+-->| *-+-+   B2                   
-        |         +---------------------+  +---+   +---+ |  +---+        
-        |                                                +->|   | 
-        |                                                   +---+                       
-        |       ExtensionClass<A1>                                                          
-        |  A2: +------------+                                                               
-        | ()<--+- __bases__ |                                                               
-        |      |  __dict__ -+->{...}                                                        
-        |      +------------+                                                               
-        |           ^                                                                       
-        |           |  ExtensionInstance                                                    
-        |       a2: | +---------------------+   vec     InstanceValueHolder<A2>             
-        |           +-+- __class__          |  +---+   +-------------+                      
-        |           | |  m_wrapped_objects -+->| *-+-->| contains A2 |                      
-        |           | +---------------------+  +---+   +-------------+                      
-        |           |                                                                       
-        |           |  ExtensionInstance                                                    
-        |   pa2_a2: | +---------------------+   vec     InstancePtrHolder<auto_ptr<A2>,A2>  
-        |           +-+- __class__          |  +---+   +---+                                
-        |           | |  m_wrapped_objects -+->| *-+-->| *-+-+   A2                         
-        |           | +---------------------+  +---+   +---+ |  +---+                       
-        |           |                                        +->|   |                       
-        |           |  ExtensionInstance                        +---+                       
-        |   pb1_a2: | +---------------------+   vec     InstancePtrHolder<auto_ptr<A2>,A2>  
-        |           +-+- __class__          |  +---+   +---+                                
-        |           | |  m_wrapped_objects -+->| *-+-->| *-+-+   B1                         
-        |           | +---------------------+  +---+   +---+ |  +---+                       
-        |           |                                        +->|   |                       
-        |           |                                           +---+                       
-        |           |                                                                       
-        |           +---------------+------------------------------+                             
-        |                           |                              |                             
- +------+-------------------------+-|----------------------------+ |                             
- |                                | |                            | |                             
- |       Class<ExtensionInstance> | |      ExtensionClass<B1>    | |      ExtensionClass<B1>     
- | DA1: +------------+            | | B1: +------------+         | | B2: +------------+          
-(*,)<---+- __bases__ |           (*,*)<---+- __bases__ |        (*,*)<---+- __bases__ |          
-        |  __dict__ -+->{...}             |  __dict__ -+->{...}          |  __dict__ -+->{...}   
-        +------------+                    +------------+                 +------------+          
-              ^                                ^                                    ^ 
-              |        ExtensionInstance       |                                    |       
-              |  da1: +---------------------+  |    vec     InstanceValueHolder<A1,A_callback>  
-              +-------+- __class__          |  |   +---+   +---------------------+  |          
-                      |  m_wrapped_objects -+--|-->| *-+-->| contains A_callback |  |          
-                      +---------------------+  |   +---+   +---------------------+  |          
-        +--------------------------------------+                                    |
-        |  ExtensionInstance                                                        |
-    b1: | +---------------------+   vec     InstanceValueHolder<B1,B_callback>      |
-        +-+- __class__          |  +---+   +---------------------+                  |
-        | |  m_wrapped_objects -+->| *-+-->| contains B_callback |                  |
-        | +---------------------+  +---+   +---------------------+                  |
-        |                                                                           |
-        |  ExtensionInstance                                                        |
-pb1_b1: | +---------------------+   vec     InstancePtrHolder<auto_ptr<B1>,B1>      |
-        +-+- __class__          |  +---+   +---+                                    |
-        | |  m_wrapped_objects -+->| *-+-->| *-+-+   B1                             |
-        | +---------------------+  +---+   +---+ |  +---+                           |
-        |                                        +->|   |                           |
-        |  ExtensionInstance                        +---+                           |
- pc_b1: | +---------------------+   vec     InstancePtrHolder<auto_ptr<B1>,B1>      |
-        +-+- __class__          |  +---+   +---+                                    |
-        | |  m_wrapped_objects -+->| *-+-->| *-+-+   C                              |
-        | +---------------------+  +---+   +---+ |  +---+                           |
-        |                                        +->|   |                           |
-        |                                           +---+                           |
-        |                                                                           |
-        |       Class<ExtensionInstance>    +---------------------------------------+
-        | DB1: +------------+               |  ExtensionInstance                                                    
-       (*,)<---+- __bases__ |           a2: | +---------------------+   vec     InstanceValueHolder<A2> 
-               |  __dict__ -+->{...}        +-+- __class__          |  +---+   +-------------+                      
-               +------------+                 |  m_wrapped_objects -+->| *-+-->| contains A2 |                      
-                     ^                        +---------------------+  +---+   +-------------+                      
-                     |  ExtensionInstance      
-                db1: | +---------------------+    vec     InstanceValueHolder<B1,B_callback>  
-                     +-+- __class__          |   +---+   +----------------------+ 
-                       |  m_wrapped_objects -+-->| *-+-->| contains B1_callback |              
-                       +---------------------+   +---+   +----------------------+              

doc/enums.html

@@ -1,103 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      Wrapping enums
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="center"
-        src="../../../c++boost.gif" alt= "c++boost.gif (8819 bytes)">Wrapping enums
-      </h1>
-
-<p>Because there is in general no way to deduce that a value of arbitrary type T
-is an enumeration constant, the Boost Python Library cannot automatically
-convert enum values to and from Python. To handle this case, you need to decide
-how you want the enum to show up in Python (since Python doesn't have
-enums). Once you have done that, you can write some simple
-<code>from_python()</code> and <code>to_python()</code> functions.
-
-<p>If you are satisfied with a Python int as a way to represent your enum
-values, we provide a shorthand for these functions. You just need to
-instantiate <code>boost::python::enum_as_int_converters&lt;EnumType&gt;</code> where
-<code>EnumType</code> is your enumerated type. There are two convenient ways to do this:
-
-<ol>
-<li><blockquote>
-<pre>
-   ...
-} // close my_namespace
-// drop into namespace python and explicitly instantiate
-BOOST_PYTHON_BEGIN_CONVERSION_NAMESPACE // this is a gcc 2.95.2 bug workaround
-  template class enum_as_int_converters<extclass_demo::EnumOwner::enum_type>;
-BOOST_PYTHON_END_CONVERSION_NAMESPACE
-namespace my_namespace { // re-open my_namespace
-   ...
-</pre>
-</blockquote>
-<li><blockquote><pre>
-// instantiate as base class in any namespace
-struct EnumTypeConverters
-    : boost::python::enum_as_int_converters&lt;EnumType&gt;
-{
-};
-</blockquote></pre>
-</ol>
-
-<p>Either of the above is equivalent to the following declarations:
-<blockquote><pre>
-BOOST_PYTHON_BEGIN_CONVERSION_NAMESPACE // this is a gcc 2.95.2 bug workaround
-
-  MyEnumType from_python(PyObject* x, boost::python::type&lt;MyEnumType&gt;)
-  {
-      return static_cast&lt;MyEnum&gt;(
-        from_python(x, boost::python::type&lt;long&gt;()));
-  }
-
-  MyEnumType from_python(PyObject* x, boost::python::type&lt;const MyEnumType&amp;&gt;)
-  {
-      return static_cast&lt;MyEnum&gt;(
-        from_python(x, boost::python::type&lt;long&gt;()));
-  }
-
-  PyObject* to_python(MyEnumType x)
-  {
-      return to_python(static_cast&lt;long&gt;(x));
-  }
-BOOST_PYTHON_END_CONVERSION_NAMESPACE
-</pre></blockquote>
-
-<p>This technique defines the conversions of
-<code>MyEnumType</code> in terms of the conversions for the built-in
- <code>long</code> type.
-
-You may also want to add a bunch of lines like this to your module
-initialization:
-
-<blockquote><pre>
-mymodule.add(boost::python::to_python(enum_value_1), "enum_value_1");
-mymodule.add(boost::python::to_python(enum_value_2), "enum_value_2");
-...
-</pre></blockquote>
-
-You can also add these to an extension class definition, if your enum happens to
-be local to a class and you want the analogous interface in Python:
-
-<blockquote><pre>
-my_class.add(boost::python::to_python(enum_value_1), "enum_value_1");
-my_class.add(boost::python::to_python(enum_value_2), "enum_value_2");
-...
-</pre></blockquote>
-               <p>
-         Next: <a href="pointers.html">Pointers</a>
-         Previous: <a href="building.html">Building an Extension Module</a>
-         Up: <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided ``as
-        is'' without express or implied warranty, and with no claim as to
-        its suitability for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/example1.html

@@ -1,130 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      A Simple Example
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" src="../../../c++boost.gif" alt=
-        "c++boost.gif (8819 bytes)">
-      </h1>
-      <h1>
-         A Simple Example
-      </h1>
-      <p>
-         Suppose we have the following C++ API which we want to expose in
-        Python:
-      <blockquote>
-<pre>
-#include &lt;string&gt;
-
-namespace hello {
-  class world
-  {
-   public:
-      world(int);
-      ~world();
-      std::string greet() const { return "hi, world"; }
-    ...
-  };
-  std::size_t length(const world&amp; x) { return std::strlen(x.greet()); }
-}
-
-</pre>
-      </blockquote>
-      <p>
-         Here is the C++ code for a python module called <code>hello</code>
-        which exposes the API using:
-      <blockquote>
-<pre>
-#include &lt;boost/python/class_builder.hpp&gt;
-// Python requires an exported function called init&lt;module-name&gt; in every
-// extension module. This is where we build the module contents.
-extern "C"
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-void inithello()
-{
-    try
-    {
-       // create an object representing this extension module
-       boost::python::module_builder m("hello");
-       // Create the Python type object for our extension class
-       boost::python::class_builder&lt;hello::world&gt; world_class(m, "world");
-       // Add the __init__ function
-       world_class.def(boost::python::constructor&lt;int&gt;());
-       // Add a regular member function
-       world_class.def(&amp;hello::world::get, "get");
-       // Add a regular function to the module
-       m.def(hello::length, "length");
-    }
-    catch(...)
-    {
-       boost::python::handle_exception();    // Deal with the exception for Python
-    }
-}
-// Win32 DLL boilerplate
-#if defined(_WIN32)
-#include &lt;windows.h&gt;
-extern "C" BOOL WINAPI DllMain(HINSTANCE, DWORD, LPVOID)
-{
-    return 1;
-}
-#endif // _WIN32
-</pre>
-      </blockquote>
-      <p>
-         That's it! If we build this shared library and put it on our <code>
-        PYTHONPATH</code> we can now access our C++ class and function from
-        Python.
-      <blockquote>
-<pre>
-&gt;&gt;&gt; import hello
-&gt;&gt;&gt; hi_world = hello.world(3)
-&gt;&gt;&gt; hi_world.greet()
-'hi, world'
-&gt;&gt;&gt; hello.length(hi_world)
-9
-</pre>
-      </blockquote>
-      <p>
-         We can even make a subclass of <code>hello.world</code>:
-      <blockquote>
-<pre>
-&gt;&gt;&gt; class my_subclass(hello.world):
-...     def greet(self):
-...         return 'hello, world'
-...
-&gt;&gt;&gt; y = my_subclass(4)
-&gt;&gt;&gt; y.greet()
-'hello, world'
-</pre>
-      </blockquote>
-      <p>
-         Pretty cool! You can't do that with an ordinary Python extension type!
-      <blockquote>
-<pre>
-&gt;&gt;&gt; hello.length(y)
-9
-</pre>
-      </blockquote>
-      <p>
-         Of course, you may now have a slightly empty feeling in the pit of
-        your little pythonic stomach. Perhaps you feel your subclass deserves
-        to have a <code>length()</code> of <code>12</code>? If so, <a href= 
-        "overriding.html">read on</a>...
-      <p>
-        Next: <a href="overriding.html">Overridable virtual functions</a>
-         Previous: <a href="comparisons.html">Comparisons with other systems</a>  Up:
-        <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided "as is" without
-        express or implied warranty, and with no claim as to its suitability
-        for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/extending.html

@@ -1,73 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
-    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
-    <title>
-      A Brief Introduction to writing Python extension modules
-    </title>
-    <h1>
-      <img src="../../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="center"
-      width="277" height="86">
-    </h1>
-    <h1>
-      A Brief Introduction to writing Python extension modules
-    </h1>
-    <p>
-      Interfacing any language to Python involves building a module which can
-      be loaded by the Python interpreter, but which isn't written in Python.
-      This is known as an <em>extension module</em>. Many of the <a href= 
-      "http://www.python.org/doc/current/lib/lib.html">built-in Python
-      libraries</a> are constructed in 'C' this way; Python even supplies its
-      <a href="http://www.python.org/doc/current/lib/types.html">fundamental
-      types</a> using the same mechanism. An extension module can be statically
-      linked with the Python interpreter, but it more commonly resides in a
-      shared library or DLL.
-    <p>
-      As you can see from <a href= 
-      "http://www.python.org/doc/current/ext/ext.html"> The Python Extending
-      and Embedding Tutorial</a>, writing an extension module normally means
-      worrying about
-    <ul>
-      <li>
-        <a href="http://www.python.org/doc/current/ext/refcounts.html">
-        maintaining reference counts</a>
-      <li>
-        <a href="http://www.python.org/doc/current/ext/callingPython.html"> how
-        to call back into Python</a>
-      <li>
-        <a href="http://www.python.org/doc/current/ext/parseTuple.html">
-        function argument parsing and typechecking</a>
-    </ul>
-    This last item typically occupies a great deal of code in an extension
-    module. Remember that Python is a completely dynamic language. A callable
-    object receives its arguments in a tuple; it is up to that object to extract
-    those arguments from the tuple, check their types, and raise appropriate
-    exceptions. There are numerous other tedious details that need to be
-    managed; too many to mention here. The Boost Python Library is designed to
-    lift most of that burden.<br>
-    <br>
-     
-    <p>
-      Another obstacle that most people run into eventually when extending
-      Python is that there's no way to make a true Python class in an extension
-      module. The typical solution is to create a new Python type in the
-      extension module, and then write an additional module in 100% Python. The
-      Python module defines a Python class which dispatches to an instance of
-      the extension type, which it contains. This allows users to write
-      subclasses of the class in the Python module, almost as though they were
-      sublcassing the extension type. Aside from being tedious, it's not really
-      the same as having a true class, because there's no way for the user to
-      override a method of the extension type which is called from the
-      extension module. BPL solves this problem by taking advantage of <a
-      href="http://www.python.org/doc/essays/metaclasses/">Python's metaclass
-      feature</a> to provide objects which look, walk, and hiss almost exactly
-      like regular Python classes. BPL classes are actually cleaner than
-      Python classes in some subtle ways; a more detailed discussion will
-      follow (someday).</p>
-    <p>Next: <a href="comparisons.html">Comparisons with Other Systems</a> Up: <a
-    href="index.html">Top</a> </p>
-    <p>
-      &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-      sell and distribute this document is granted provided this copyright
-      notice appears in all copies. This document is provided "as is" without
-      express or implied warranty, and with no claim as to its suitability for
-      any purpose.</p>
-

doc/index.html

@@ -1,160 +1,184 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
-    <title>
-      The Boost Python Library (BPL)
-    </title>
-    <h1>
-       <img src="../../../c++boost.gif" alt="c++boost.gif (8819 bytes)" width="277"
-      align="center" height="86">The Boost Python Library (BPL)
-    </h1>
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 
-<h2>Synopsis</h2>
-    <p>
-      Use the Boost Python Library to quickly and easily export a C++ library to <a
-      href="http://www.pythonlabs.com/pub/www.python.org">Python</a> such that the Python interface is
-      very similar to the C++ interface. It is designed to be minimally
-      intrusive on your C++ design. In most cases, you should not have to alter
-      your C++ classes in any way in order to use them with BPL. The system
-      <em>should</em> simply ``reflect'' your C++ classes and functions into
-      Python. The major features of BPL include support for:
-<ul>
-<li><a href="inheritance.html">Subclassing extension types in Python</a>
-<li><a href="overriding.html">Overriding virtual functions in Python</a>
-<li><a href="overloading.html">[Member] function Overloading</a>
-<li><a href="special.html#numeric_auto">Automatic wrapping of numeric operators</a>
-</ul>
-among others.
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../../../boost.css">
+
+    <title>Boost.Python</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center">Boost.Python</h1>
+
+          <h2 align="center">Index</h2>
+        </td>
 
 
-<h2>Supported Platforms</h2>
-<p>BPL has been tested in the following configurations:
+        <td align="right">
 
-<ul>
-<li>Against Python 1.5.2 using the following compiler/library: 
+          <form method="get" action="http://www.google.com/custom">
+            <p>
+              <span id= "search-choice">
+                Search
+                <select name="hq" id="hq">
+                  <option label="All Documentation" value=
+                          "site:www.boost.org inurl:www.boost.org/libs/python/doc">
+                    All Documentation
+                  </option>
+                  <option label="Tutorial" value=
+                          "site:www.boost.org inurl:www.boost.org/libs/python/doc/tutorial">
+                    Tutorial
+                  </option>
+                  <option label="Reference" value=
+                          "site:www.boost.org inurl:www.boost.org/libs/python/doc/v2">
+                    Reference
+                  </option>
+              </select>
+                <br>
+             </span> 
 
-  <ul>
-  <li><a
-  href="http://msdn.microsoft.com/vstudio/sp/vs6sp4/dnldoverview.asp">MSVC++6sp4</a> 
+              <span id="search-text">
+                <input type="text" name="q" id="q" size="31" maxlength="255" alt="Search Text" />
+              </span> 
 
-  <li><a
-  href="http://msdn.microsoft.com/vstudio/sp/vs6sp4/dnldoverview.asp">MSVC++6sp4</a>/<a
-  href="http://www.stlport.org">STLport 4.0</a> 
+              <br>
+              <span id= "google">
+                <a href= "http://www.google.com/search"> 
+                  <img src="../../../more/google_logo_25wht.gif" alt="Google" border="0" /></a>Powered
+              </span> 
 
-  <li><a href="http://gcc.gnu.org/">GCC 2.95.2</a> [by <a href="mailto:koethe@informatik.uni-hamburg.de">Ullrich
-  Koethe</a>]
+              <span id="go">
+                <input type="image" name="search" src="../../../more/space.gif" alt="Search" id="search-button" />
+              </span> 
 
-  <li><a href="http://gcc.gnu.org/">GCC 2.95.2</a>/<a href="http://www.stlport.org">STLport 4.0</a>
+              <br>
+              <input type="hidden" name="cof" value= "LW:277;L:http://www.boost.org/boost.png;LH:86;AH:center;GL:0;S:http://www.boost.org;AWFID:9b83d16ce652ed5a;" />
+              <input type="hidden" name="sa" value= "Google Search" /> 
+              <input type="hidden" name= "domains" value= "www.boost.org;mail.python.org" /></p>
+          </form>
 
-  <li>Compaq C++ V6.2-024 for Digital UNIX V5.0 Rev. 910 (an <a
-  href="http://www.edg.com/">EDG</a>-based compiler) with <a
-  href="http://www.stlport.org/beta.html">STLport-4.1b3</a> [by <a
-  href="mailto:rwgk@cci.lbl.gov">Ralf W. Grosse-Kunstleve</a>] 
+        </td>
+      </tr>
+<tr>
 
-  <li>An upcoming release of <a href="http://www.metrowerks.com/products/windows/">Metrowerks CodeWarrior
-        Pro6 for Windows</a> (the first release has a bug that's fatal to BPL)
-  </ul>
-<br>
-<li>Against Python 2.0 using the following compiler/library combinations:
-<ul>
-  <li><a
-  href="http://msdn.microsoft.com/vstudio/sp/vs6sp4/dnldoverview.asp">MSVC++6sp4</a> [by
-  <a href="mailto:aleaxit@yahoo.com">Alex Martelli</a>]
-</ul>
-</ul>
+      </tr>
+    </table>
+    <hr>
 
-<h2>Credits</h2>
-<ul>
-      <li><a href="../../../people/dave_abrahams.htm">David Abrahams</a> originated
-      and wrote the library.
 
-      <li><a href="mailto:koethe@informatik.uni-hamburg.de">Ullrich Koethe</a>
-      had independently developed a similar system. When he discovered BPL,
-      he generously contributed countless hours of coding and much insight into
-      improving it. He is responsible for an early version of the support for <a
-      href="overloading.html">function overloading</a> and wrote the support for
-      <a href="inheritance.html#implicit_conversion">reflecting C++ inheritance
-      relationships</a>. He has helped to improve error-reporting from both
-      Python and C++, and has designed an extremely easy-to-use way of 
-      exposing <a href="special.html#numeric">numeric operators</a>, including
-      a way to avoid explicit coercion by means of overloading.
+    <h2>Synopsis</h2>
+    Welcome to version 2 of <b>Boost.Python</b>, a C++ library which enables
+    seamless interoperability between C++ and the <a href=
+    "http://www.python.org">Python</a> programming language. The new version
+    has been rewritten from the ground up, with a more convenient and
+    flexible interface, and many new capabilities, including support for: 
 
-      <li>The members of the boost mailing list and the Python community
-      supplied invaluable early feedback. In particular, Ron Clarke, Mark Evans,
-      Anton Gluck, Ralf W. Grosse-Kunstleve, Chuck Ingold, Prabhu Ramachandran,
-      and Barry Scott took the brave step of trying to use BPL while it was
-      still in early stages of development.
+    <ul>
+      <li>References and Pointers</li>
 
-      <li>The development of BPL wouldn't have been
-      possible without the generous support of <a href="http://www.dragonsys.com/">Dragon Systems/Lernout and
-      Hauspie, Inc</a> who supported its development as an open-source project.
-</ul>
+      <li>Globally Registered Type Coercions</li>
 
-    <h2>Table of Contents</h2>
+      <li>Automatic Cross-Module Type Conversions</li>
 
-    <ol>
-      <li><a href="extending.html">A Brief Introduction to writing Python
-        extension modules</a>
+      <li>Efficient Function Overloading</li>
 
-      <li><a href="comparisons.html">Comparisons between BPL and other
-        systems for extending Python</a>
+      <li>C++ to Python Exception Translation</li>
 
-      <li><a href="example1.html">A Simple Example</a>
+      <li>Default Arguments</li>
 
-      <li><a href="overriding.html">Overridable Virtual Functions</a>
+      <li>Keyword Arguments</li>
 
-      <li><a href="overloading.html">Function Overloading</a>
+      <li>Manipulating Python objects in C++</li>
 
-      <li><a href="inheritance.html">Inheritance</a>
+      <li>Exporting C++ Iterators as Python Iterators</li>
 
-      <li><a href="special.html">Special Method and Operator Support</a>
+      <li>Documentation Strings</li>
+    </ul>
+    The development of these features was funded in part by grants to <a
+    href="http://www.boost-consulting.com">Boost Consulting</a> from the <a
+    href="http://www.llnl.gov/">Lawrence Livermore National Laboratories</a>
+    and by the <a href="http://cci.lbl.gov/">Computational Crystallography
+    Initiative</a> at Lawrence Berkeley National Laboratories. 
 
-      <li><a href="under-the-hood.html">A Peek Under the Hood</a>
+    <hr>
 
-      <li><a href="building.html">Building an Extension Module</a>
+    <h2>Contents</h2>
 
-      <li>Advanced Topics
+    <dl class="index">
+      <dt><a href="tutorial/index.html">Tutorial Introduction</a></dt>
 
-        <ol>
-          <li>Pickling
+      <dt><a href="building.html">Building and Testing</a></dt>
 
-          <li>class_builder&lt;&gt;
+      <dt><a href="v2/reference.html">Reference Manual</a></dt>
 
-          <li><a href="enums.html">enums</a>
+      <dt>Suites:</dt>
+        <dd>
+          <ul>
+            <li><a href="v2/pickle.html">Pickle</a></li>
+            <li><a href="v2/indexing.html">Indexing</a></li>
+          </ul>
+        </dd>
 
-          <li>References
+      <dt><a href="v2/configuration.html">Configuration Information</a></dt>
 
-          <li><a href="pointers.html">Pointers and Smart Pointers</a>
+      <dt><a href="v2/platforms.html">Known Working Platforms and
+      Compilers</a></dt>
 
-          <li>Built-in Python Types
+      <dt><a href="v2/definitions.html">Definitions</a></dt>
 
-          <li>Other Extension Types
+      <dt><a href="projects.html">Projects using Boost.Python</a></dt>
 
-          <li>Templates
-          
-          <li><a href="data_structures.txt">Internal Data Structures</a>
-        </ol>
-          
-</ol>  
+      <dt><a href="support.html">Support Resources</a></dt>
+
+      <dt><a href="v2/faq.html">Frequently Asked Questions (FAQs)</a></dt>
+      
+      <dt><a href="http://www.language-binding.net/pyplusplus/pyplusplus.html">Py++ Boost.Python code generator</a></dt>
+
+      <dt><a href="../pyste/index.html">Pyste Boost.Python code generator (no longer maintained)</a></dt>
+
+      <dt><a href="internals.html">Internals Documentation</a></dt>
+
+      <dt><a href="news.html">News/Change Log</a></dt>
  
-    <p>
-      Documentation is a major ongoing project; assistance is greatly
-      appreciated! In the meantime, useful examples of every BPL feature should
-      be evident in the regression test files <code>test/comprehensive.[<a
-      href="../test/comprehensive.py">py</a>/<a
-      href="../test/comprehensive.hpp">hpp</a>/<a
-      href="../test/comprehensive.cpp">cpp</a>]</code>
+      <dt><a href="../todo.html">TODO list</a></dt>
 
-    <p>
-       Questions should be directed to <a href= 
-      "http://www.egroups.com/list/boost">the boost mailing list</a>.
+     <dt><a href="v2/progress_reports.html">LLNL Progress Reports</a></dt>
 
-    <p>
-       &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-      sell and distribute this document is granted provided this copyright
-      notice appears in all copies. This document is provided ``as is'' without
-      express or implied warranty, and with no claim as to its suitability for
-      any purpose.
-    <p>
-       Updated: Nov 26, 2000
+      <dt><a href="v2/acknowledgments.html">Acknowledgments</a></dt>
+    </dl>
+    <hr>
+
+    <h2>Articles</h2>
+
+      &quot;<a href="PyConDC_2003/bpl.html">Building Hybrid
+      Systems With Boost Python</a>&quot;, by Dave Abrahams and Ralf
+      W. Grosse-Kunstleve (<a href="PyConDC_2003/bpl.pdf">PDF</a>)
+
+    <hr>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     26 August, 2003
+    <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+    Abrahams</a> 2002-2003.</i></p>
+  </body>
+</html>
 

doc/inheritance.html

@@ -1,169 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      Inheritance
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="center"
-        src="../../../c++boost.gif" alt= "c++boost.gif (8819 bytes)">Inheritance
-      </h1>
-
-<h2>Inheritance in Python</h2>
-
-      <p>
-         BPL extension classes support single and multiple-inheritance in
-         Python, just like regular Python classes. You can arbitrarily mix
-         built-in Python classes with extension classes in a derived class'
-         tuple of bases. Whenever a BPL extension class is among the bases for a
-         new class in Python, the result is an extension class:
-<blockquote>
-<pre>
-&gt;&gt;&gt; class MyPythonClass:
-...     def f(): return 'MyPythonClass.f()'
-...
-&gt;&gt;&gt; import my_extension_module
-&gt;&gt;&gt; class Derived(my_extension_module.MyExtensionClass, MyPythonClass):
-...     '''This is an extension class'''
-...     pass
-...
-&gt;&gt;&gt; x = Derived()
-&gt;&gt;&gt; x.f()
-'MyPythonClass.f()'
-&gt;&gt;&gt; x.g()
-'MyExtensionClass.g()'
-</pre>
-</blockquote>
-
-<h2><a name="implicit_conversion">Reflecting C++ Inheritance Relationships</a></h2>
-      <p>
-        BPL also allows us to represent C++ inheritance relationships so that
-        wrapped derived classes may be passed where values, pointers, or
-        references to a base class are expected as arguments. The
-        <code>declare_base</code> member function of
-        <code>class_builder&lt;&gt;</code> is used to establish the relationship
-        between base and derived classes:
-
-<blockquote>
-<pre>
-#include &lt;memory&gt; // for std::auto_ptr&lt;&gt;
-
-struct Base {
-    virtual ~Base() {}
-    virtual const char* name() const { return "Base"; }
-};
-
-struct Derived : Base {
-    Derived() : x(-1) {}
-    virtual const char* name() const { return "Derived"; }
-    int x;
-};
-
-std::auto_ptr&lt;Base&gt; derived_as_base() {
-    return std::auto_ptr&lt;Base&gt;(new Derived);
-}
-
-const char* get_name(const Base& b) {
-    return b.name();
-}
-
-int get_derived_x(const Derived& d) {
-    return d.x;
-}
-    <hr>
-#include &lt;boost/python/class_builder.hpp&gt;
-
-// namespace alias for code brevity
-namespace python = boost::python;
-
-extern "C"
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-void initmy_module()
-{
-    try
-    {
-       python::module_builder my_module("my_module");
-
-       python::class_builder&lt;Base&gt; base_class(my_module, "Base");
-       base_class.def(python::constructor&lt;void&gt;());
-
-       python::class_builder&lt;Derived&gt; derived_class(my_module, "Derived");
-       derived_class.def(python::constructor&lt;void&gt;());
-       <b>// Establish the inheritance relationship between Base and Derived
-       derived_class.declare_base(base_class);</b>
-
-       my_module.def(derived_as_base, "derived_as_base");
-       my_module.def(get_name, "get_name");
-       my_module.def(get_derived_x, "get_derived_x");
-    }
-    catch(...)
-    {
-       python::handle_exception();    // Deal with the exception for Python
-    }
-}
-</pre>
-</blockquote>
-
-<p>
-   Then, in Python:
-<blockquote>
-<pre>
-&gt;&gt;&gt; from my_module import *
-&gt;&gt;&gt; base = Base()
-&gt;&gt;&gt; derived = Derived()
-&gt;&gt;&gt; get_name(base)
-'Base'
-</pre><i>objects of wrapped class Derived may be passed where Base is expected</i><pre>
-&gt;&gt;&gt; get_name(derived) 
-'Derived'
-</pre><i>objects of wrapped class Derived can be passed where Derived is 
-expected but where type information has been lost.</i><pre>
-&gt;&gt;&gt; get_derived_x(derived_as_base()) 
--1
-</pre>
-</blockquote>
-
-<h2>Inheritance Without Virtual Functions</h2>
-
-<p>
-  If for some reason your base class has no virtual functions but you still want
-  to represent the inheritance relationship between base and derived classes,
-  pass the special symbol <code>boost::python::without_downcast</code> as the 2nd parameter
-  to <code>declare_base</code>:
-
-<blockquote>
-<pre>
-struct Base2 {};
-struct Derived2 { int f(); };
-<hr>
-   ...
-   python::class_builder&lt;Base&gt; base2_class(my_module, "Base2");
-   base2_class.def(python::constructor&lt;void&gt;());
-
-   python::class_builder&lt;Derived2&gt; derived2_class(my_module, "Derived2");
-   derived2_class.def(python::constructor&lt;void&gt;());
-   derived_class.declare_base(base_class, <b>python::without_downcast</b>);
-</pre>
-</blockquote>
-
-<p>This approach will allow <code>Derived2</code> objects to be passed where
- <code>Base2</code> is expected, but does not attempt to implicitly convert (downcast)
- smart-pointers to <code>Base2</code> into <code>Derived2</code> pointers,
- references, or values.
-
-      <p>
-         Next: <a href="special.html">Special Method and Operator Support</a>
-         Previous: <a href="overloading.html">Function Overloading</a>
-         Up: <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided "as is" without
-        express or implied warranty, and with no claim as to its suitability
-        for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/internals.html

@@ -0,0 +1,186 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+<meta name="generator" content="Docutils 0.3.0: http://docutils.sourceforge.net/" />
+<title>Boost.Python Internals Boost</title>
+<link rel="stylesheet" href="../../../rst.css" type="text/css" />
+</head>
+<body>
+<div class="document" id="boost-python-internals-logo">
+<h1 class="title"><a class="reference" href="index.html">Boost.Python</a> Internals <a class="reference" href="../../../index.htm"><img alt="Boost" src="../../../boost.png" /></a></h1>
+<div class="section" id="a-conversation-between-brett-calcott-and-david-abrahams">
+<h1><a name="a-conversation-between-brett-calcott-and-david-abrahams">A conversation between Brett Calcott and David Abrahams</a></h1>
+<table class="field-list" frame="void" rules="none">
+<col class="field-name" />
+<col class="field-body" />
+<tbody valign="top">
+<tr class="field"><th class="field-name">copyright:</th><td class="field-body">Copyright David Abrahams and Brett Calcott 2003. See
+accompanying <a class="reference" href="../../../LICENSE_1_0.txt">license</a> for terms of use.</td>
+</tr>
+</tbody>
+</table>
+<p>In both of these cases, I'm quite capable of reading code - but the
+thing I don't get from scanning the source is a sense of the
+architecture, both structurally, and temporally (er, I mean in what
+order things go on).</p>
+<ol class="arabic">
+<li><p class="first">What happens when you do the following:</p>
+<pre class="literal-block">
+struct boring {};
+...etc...
+class_&lt;boring&gt;(&quot;boring&quot;)
+    ;
+</pre>
+</li>
+</ol>
+<p>There seems to be a fair bit going on.</p>
+<blockquote>
+<ul class="simple">
+<li>Python needs a new ClassType to be registered.</li>
+<li>We need to construct a new type that can hold our boring struct.</li>
+<li>Inward and outward converters need to be registered for the type.</li>
+</ul>
+</blockquote>
+<p>Can you gesture in the general direction where these things are done?</p>
+<blockquote>
+<p>I only have time for a &quot;off-the-top-of-my-head&quot; answer at the moment;
+I suggest you step through the code with a debugger after reading this
+to see how it works, fill in details, and make sure I didn't forget
+anything.</p>
+<blockquote>
+<p>A new (Python) subclass of Boost.Python.Instance (see
+libs/python/src/object/class.cpp) is created by invoking
+Boost.Python.class, the metatype:</p>
+<pre class="literal-block">
+&gt;&gt;&gt; boring = Boost.Python.class(
+...     'boring'
+...   , bases_tuple       # in this case, just ()
+...   , { 
+...         '__module__' : module_name
+...       , '__doc__' : doc_string # optional
+...     }
+... )
+</pre>
+<p>A handle to this object is stuck in the m_class_object field
+of the registration associated with <tt class="literal"><span class="pre">typeid(boring)</span></tt>.  The
+registry will keep that object alive forever, even if you
+wipe out the 'boring' attribute of the extension module
+(probably not a good thing).</p>
+<p>Because you didn't specify <tt class="literal"><span class="pre">class&lt;boring,</span> <span class="pre">non_copyable,</span>
+<span class="pre">...&gt;</span></tt>, a to-python converter for boring is registered which
+copies its argument into a value_holder held by the the
+Python boring object.</p>
+<p>Because you didn't specify <tt class="literal"><span class="pre">class&lt;boring</span> <span class="pre">...&gt;(no_init)</span></tt>,
+an <tt class="literal"><span class="pre">__init__</span></tt> function object is added to the class
+dictionary which default-constructs a boring in a
+value_holder (because you didn't specify some smart pointer
+or derived wrapper class as a holder) held by the Python
+boring object.</p>
+<p><tt class="literal"><span class="pre">register_class_from_python</span></tt> is used to register a
+from-python converter for <tt class="literal"><span class="pre">shared_ptr&lt;boring&gt;</span></tt>.
+<tt class="literal"><span class="pre">boost::shared_ptr</span></tt>s are special among smart pointers
+because their Deleter argument can be made to manage the
+whole Python object, not just the C++ object it contains, no
+matter how the C++ object is held.</p>
+<p>If there were any <tt class="literal"><span class="pre">bases&lt;&gt;</span></tt>, we'd also be registering the
+relationship between these base classes and boring in the
+up/down cast graph (<tt class="literal"><span class="pre">inheritance.[hpp/cpp]</span></tt>).</p>
+<p>In earlier versions of the code, we'd be registering lvalue
+from-python converters for the class here, but now
+from-python conversion for wrapped classes is handled as a
+special case, before consulting the registry, if the source
+Python object's metaclass is the Boost.Python metaclass.</p>
+<p>Hmm, that from-python converter probably ought to be handled
+the way class converters are, with no explicit conversions
+registered.</p>
+</blockquote>
+</blockquote>
+<ol class="arabic" start="2">
+<li><p class="first">Can you give a brief overview of the data structures that are
+present in the registry</p>
+<blockquote>
+<p>The registry is simple: it's just a map from typeid -&gt;
+registration (see boost/python/converter/registrations.hpp).
+<tt class="literal"><span class="pre">lvalue_chain</span></tt> and <tt class="literal"><span class="pre">rvalue_chain</span></tt> are simple endogenous
+linked lists.</p>
+<p>If you want to know more, just ask.</p>
+<p>If you want to know about the cast graph, ask me something specific in
+a separate message.</p>
+</blockquote>
+<p>and an overview of the process that happens as a type makes its
+way from c++ to python and back again.</p>
+</li>
+</ol>
+<blockquote>
+<p>Big subject.  I suggest some background reading: look for relevant
+info in the LLNL progress reports and the messages they link to.
+Also,</p>
+<blockquote>
+<p><a class="reference" href="http://mail.python.org/pipermail/c++-sig/2002-May/001023.html">http://mail.python.org/pipermail/c++-sig/2002-May/001023.html</a></p>
+<p><a class="reference" href="http://mail.python.org/pipermail/c++-sig/2002-December/003115.html">http://mail.python.org/pipermail/c++-sig/2002-December/003115.html</a></p>
+<p><a class="reference" href="http://aspn.activestate.com/ASPN/Mail/Message/1280898">http://aspn.activestate.com/ASPN/Mail/Message/1280898</a></p>
+<p><a class="reference" href="http://mail.python.org/pipermail/c++-sig/2002-July/001755.html">http://mail.python.org/pipermail/c++-sig/2002-July/001755.html</a></p>
+</blockquote>
+<p>from c++ to python:</p>
+<blockquote>
+<p>It depends on the type and the call policies in use or, for
+<tt class="literal"><span class="pre">call&lt;&gt;(...)</span></tt>, <tt class="literal"><span class="pre">call_method&lt;&gt;(...)</span></tt>, or <tt class="literal"><span class="pre">object(...)</span></tt>, if
+<tt class="literal"><span class="pre">ref</span></tt> or <tt class="literal"><span class="pre">ptr</span></tt> is used.  There are also two basic
+categories to to-python conversion, &quot;return value&quot; conversion
+(for Python-&gt;C++ calls) and &quot;argument&quot; conversion (for
+C++-&gt;Python calls and explicit <tt class="literal"><span class="pre">object()</span></tt> conversions).  The
+behavior of these two categories differs subtly in various ways
+whose details I forget at the moment.  You can probably find
+the answers in the above references, and certainly in the code.</p>
+<p>The &quot;default&quot; case is by-value (copying) conversion, which uses
+to_python_value as a to-python converter.</p>
+<blockquote>
+<p>Since there can sensibly be only one way to convert any type
+to python (disregarding the idea of scoped registries for the
+moment), it makes sense that to-python conversions can be
+handled by specializing a template.  If the type is one of
+the types handled by a built-in conversion
+(builtin_converters.hpp), the corresponding template
+specialization of to_python_value gets used.</p>
+<p>Otherwise, to_python_value uses the <tt class="literal"><span class="pre">m_to_python</span></tt>
+function in the registration for the C++ type.</p>
+</blockquote>
+<p>Other conversions, like by-reference conversions, are only
+available for wrapped classes, and are requested explicitly by
+using <tt class="literal"><span class="pre">ref(...)</span></tt>, <tt class="literal"><span class="pre">ptr(...)</span></tt>, or by specifying different
+CallPolicies for a call, which can cause a different to-python
+converter to be used.  These conversions are never registered
+anywhere, though they do need to use the registration to find
+the Python class corresponding to the C++ type being referred
+to.  They just build a new Python instance and stick the
+appropriate Holder instance in it.</p>
+</blockquote>
+<p>from python to C++:</p>
+<blockquote>
+<p>Once again I think there is a distinction between &quot;return value&quot;
+and &quot;argument&quot; conversions, and I forget exactly what that is.</p>
+<p>What happens depends on whether an lvalue conversion is needed
+(see <a class="reference" href="http://mail.python.org/pipermail/c++-sig/2002-May/001023.html">http://mail.python.org/pipermail/c++-sig/2002-May/001023.html</a>)
+All lvalue conversions are also registered in a type's rvalue
+conversion chain, since when an rvalue will do, an lvalue is
+certainly good enough.</p>
+<p>An lvalue conversion can be done in one step (just get me the
+pointer to the object - it can be <tt class="literal"><span class="pre">NULL</span></tt> if no conversion is
+possible) while an rvalue conversion requires two steps to
+support wrapped function overloading and multiple converters for
+a given C++ target type: first tell me if a conversion is
+possible, then construct the converted object as a second step.</p>
+</blockquote>
+</blockquote>
+</div>
+</div>
+<hr class="footer"/>
+<div class="footer">
+<a class="reference" href="internals.rst">View document source</a>.
+Generated on: 2003-09-12 14:51 UTC.
+Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
+</div>
+</body>
+</html>

doc/internals.rst

@@ -0,0 +1,182 @@
+===================================
+ Boost.Python_ Internals |(logo)|__
+===================================
+
+.. |(logo)| image:: ../../../boost.png
+   :alt: Boost
+   :class: boost-logo
+
+__ ../../../index.htm
+
+.. _`Boost.Python`: index.html
+
+.. _license: ../../../LICENSE_1_0.txt
+
+
+-------------------------------------------------------
+A conversation between Brett Calcott and David Abrahams
+-------------------------------------------------------
+
+:copyright: Copyright David Abrahams and Brett Calcott 2003. See
+            accompanying license_ for terms of use.
+
+In both of these cases, I'm quite capable of reading code - but the
+thing I don't get from scanning the source is a sense of the
+architecture, both structurally, and temporally (er, I mean in what
+order things go on).
+
+1) What happens when you do the following::
+
+     struct boring {};
+     ...etc...
+     class_<boring>("boring")
+         ;
+
+There seems to be a fair bit going on.
+
+ - Python needs a new ClassType to be registered.
+ - We need to construct a new type that can hold our boring struct.
+ - Inward and outward converters need to be registered for the type.
+
+Can you gesture in the general direction where these things are done?
+
+  I only have time for a "off-the-top-of-my-head" answer at the moment;
+  I suggest you step through the code with a debugger after reading this
+  to see how it works, fill in details, and make sure I didn't forget
+  anything.
+
+          A new (Python) subclass of Boost.Python.Instance (see
+          libs/python/src/object/class.cpp) is created by invoking
+          Boost.Python.class, the metatype::
+
+                >>> boring = Boost.Python.class(
+                ...     'boring'
+                ...   , bases_tuple       # in this case, just ()
+                ...   , { 
+                ...         '__module__' : module_name
+                ...       , '__doc__' : doc_string # optional
+                ...     }
+                ... )
+
+          A handle to this object is stuck in the m_class_object field
+          of the registration associated with ``typeid(boring)``.  The
+          registry will keep that object alive forever, even if you
+          wipe out the 'boring' attribute of the extension module
+          (probably not a good thing).
+
+          Because you didn't specify ``class<boring, non_copyable,
+          ...>``, a to-python converter for boring is registered which
+          copies its argument into a value_holder held by the the
+          Python boring object.
+
+          Because you didn't specify ``class<boring ...>(no_init)``,
+          an ``__init__`` function object is added to the class
+          dictionary which default-constructs a boring in a
+          value_holder (because you didn't specify some smart pointer
+          or derived wrapper class as a holder) held by the Python
+          boring object.
+
+          ``register_class_from_python`` is used to register a
+          from-python converter for ``shared_ptr<boring>``.
+          ``boost::shared_ptr``\ s are special among smart pointers
+          because their Deleter argument can be made to manage the
+          whole Python object, not just the C++ object it contains, no
+          matter how the C++ object is held.
+
+          If there were any ``bases<>``, we'd also be registering the
+          relationship between these base classes and boring in the
+          up/down cast graph (``inheritance.[hpp/cpp]``).
+
+          In earlier versions of the code, we'd be registering lvalue
+          from-python converters for the class here, but now
+          from-python conversion for wrapped classes is handled as a
+          special case, before consulting the registry, if the source
+          Python object's metaclass is the Boost.Python metaclass.
+
+          Hmm, that from-python converter probably ought to be handled
+          the way class converters are, with no explicit conversions
+          registered.
+
+2) Can you give a brief overview of the data structures that are
+   present in the registry
+
+        The registry is simple: it's just a map from typeid ->
+        registration (see boost/python/converter/registrations.hpp).
+        ``lvalue_chain`` and ``rvalue_chain`` are simple endogenous
+        linked lists.
+
+        If you want to know more, just ask.
+
+        If you want to know about the cast graph, ask me something specific in
+        a separate message.
+
+   and an overview of the process that happens as a type makes its
+   way from c++ to python and back again.
+
+  Big subject.  I suggest some background reading: look for relevant
+  info in the LLNL progress reports and the messages they link to.
+  Also, 
+
+        http://mail.python.org/pipermail/c++-sig/2002-May/001023.html
+
+        http://mail.python.org/pipermail/c++-sig/2002-December/003115.html
+
+        http://aspn.activestate.com/ASPN/Mail/Message/1280898
+
+        http://mail.python.org/pipermail/c++-sig/2002-July/001755.html
+
+  from c++ to python:
+
+       It depends on the type and the call policies in use or, for
+       ``call<>(...)``, ``call_method<>(...)``, or ``object(...)``, if
+       ``ref`` or ``ptr`` is used.  There are also two basic
+       categories to to-python conversion, "return value" conversion
+       (for Python->C++ calls) and "argument" conversion (for
+       C++->Python calls and explicit ``object()`` conversions).  The
+       behavior of these two categories differs subtly in various ways
+       whose details I forget at the moment.  You can probably find
+       the answers in the above references, and certainly in the code.
+
+       The "default" case is by-value (copying) conversion, which uses
+       to_python_value as a to-python converter.
+
+           Since there can sensibly be only one way to convert any type
+           to python (disregarding the idea of scoped registries for the
+           moment), it makes sense that to-python conversions can be
+           handled by specializing a template.  If the type is one of
+           the types handled by a built-in conversion
+           (builtin_converters.hpp), the corresponding template
+           specialization of to_python_value gets used.
+
+           Otherwise, to_python_value uses the ``m_to_python``
+           function in the registration for the C++ type.
+
+       Other conversions, like by-reference conversions, are only
+       available for wrapped classes, and are requested explicitly by
+       using ``ref(...)``, ``ptr(...)``, or by specifying different
+       CallPolicies for a call, which can cause a different to-python
+       converter to be used.  These conversions are never registered
+       anywhere, though they do need to use the registration to find
+       the Python class corresponding to the C++ type being referred
+       to.  They just build a new Python instance and stick the
+       appropriate Holder instance in it.
+
+
+  from python to C++:
+
+       Once again I think there is a distinction between "return value"
+       and "argument" conversions, and I forget exactly what that is.
+
+       What happens depends on whether an lvalue conversion is needed
+       (see http://mail.python.org/pipermail/c++-sig/2002-May/001023.html)
+       All lvalue conversions are also registered in a type's rvalue
+       conversion chain, since when an rvalue will do, an lvalue is
+       certainly good enough.
+
+       An lvalue conversion can be done in one step (just get me the
+       pointer to the object - it can be ``NULL`` if no conversion is
+       possible) while an rvalue conversion requires two steps to
+       support wrapped function overloading and multiple converters for
+       a given C++ target type: first tell me if a conversion is
+       possible, then construct the converted object as a second step.
+

doc/news.html

@@ -0,0 +1,335 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+  <meta name="generator" content=
+  "HTML Tidy for Cygwin (vers 1st September 2004), see www.w3.org">
+  <meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
+  <link rel="stylesheet" type="text/css" href="boost.css">
+
+  <title>Boost.Python - News/Change Log</title>
+</head>
+
+<body link="#0000FF" vlink="#800080">
+  <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+  "header">
+    <tr>
+      <td valign="top" width="300">
+        <h3><a href="../../../index.htm"><img height="86" width="277" alt=
+        "C++ Boost" src="../../../boost.png" border="0"></a></h3>
+      </td>
+
+      <td valign="top">
+        <h1 align="center"><a href="index.html">Boost.Python</a></h1>
+
+        <h2 align="center">News/Change Log</h2>
+      </td>
+    </tr>
+  </table>
+  <hr>
+
+  <dl class="page-index">
+    <dt>Current SVN</dt>
+
+    <dd>
+      <ul>
+        <li>Pythonic signatures are now automatically appended to the
+        docstrings.
+
+        <li>Use <a href="v2/docstring_options.html"
+        ><code>docstring_options.hpp</code></a> header 
+        control the content of docstrings.
+	
+	<li>This new feature increases the size of the modules by about 14%.
+        If this is not acceptable it can be turned off by defining the macro
+        BOOST_PYTHON_NO_PY_SIGNATURES. Modules compiled with and without the macro
+        defined are compatible.
+        </li>
+	<li> If BOOST_PYTHON_NO_PY_SIGNATURES is undefined, this version defines the 
+        macro BOOST_PYTHON_SUPPORTS_PY_SIGNATURES. This allows writing code that will compile
+        with older version of Boost.Python (see <a href="v2/pytype_function.html#examples">here</a>).
+        </li>
+	<li>By defining BOOST_PYTHON_PY_SIGNATURES_PROPER_INIT_SELF_TYPE, and at a cost
+        of another 14% size increase, proper pythonic type is generated for the "self"
+        parameter of the __init__ methods.
+        </li>
+        
+        <li> To support this new feature changes were made to the 
+        <a href="v2/to_python_converter.html"><code>to_python_converter.hpp</code></a>, 
+        <a href="v2/default_call_policies.html"><code>default_call_policies</code></a>,
+        <a href="v2/ResultConverter.html"><code>ResultConverter</code></a>,
+        <a href="v2/CallPolicies.html"><code>CallPolicies</code></a> and some others.
+        Efforts were made not to have interface breaking changes. 
+        </li>
+
+      </ul>
+    </dd>
+
+    <dt>12 May 2007 - 1.34.0 release</dt>
+
+    <dd>
+      <ul>
+        <li>C++ signatures are now automatically appended to the
+        docstrings.
+
+        <li>New <a href="v2/docstring_options.html"
+        ><code>docstring_options.hpp</code></a> header to
+        control the content of docstrings.
+
+        <li>Support for converting <code>void*</code> to/from python,
+        with <code><a
+        href="v2/opaque.html">opaque_pointer_converter</a></code>
+        as the return value policy.  Thanks to Niall Douglas for the
+        initial patch.
+      </ul>
+    </dd>
+
+    <dt>19 October 2005 - 1.33.1 release</dt>
+
+    <dd>
+      <ul>
+        <li><code>wrapper&lt;T&gt;</code> can now be used as expected with a
+        held type of <i>some-smart-pointer</i><code>&lt;T&gt;</code></li>
+
+        <li>The build now assumes Python 2.4 by default, rather than 2.2</li>
+
+        <li>Support Python that's built without Unicode support</li>
+
+        <li>Support for wrapping classes with overloaded address-of
+        (<code>&amp;</code>) operators</li>
+      </ul>
+    </dd>
+
+    <dt>14 August 2005 - 1.33 release</dt>
+
+    <dd>
+      <ul>
+        <li>Support for docstrings on nonstatic properties.</li>
+
+        <li>We now export the client-provided docstrings for
+        <code>init&lt;optional&lt;&gt; &gt;</code> and
+        <i>XXX</i><code>_FUNCTION_OVERLOADS()</code> for only the last
+        overload.</li>
+
+        <li>Fixed some support for Embedded VC++ 4</li>
+
+        <li>Better support for rvalue from-python conversions of shared_ptr:
+        always return a pointer that holds the owning python object *unless*
+        the python object contains a NULL shared_ptr holder of the right
+        type.</li>
+
+        <li>Support for exposing <code>vector&lt;T*&gt;</code> with the
+        indexing suite.</li>
+
+        <li>Support for GCC-3.3 on MacOS.</li>
+
+        <li>updated visual studio project build file to include two new files
+        (slice.cpp and wrapper.cpp)</li>
+
+        <li>Added search feature to the index page.</li>
+
+        <li>Numerous fixes to the tutorial</li>
+
+        <li>Numerous workarounds for MSVC 6 and 7, GCC 2.96, and EDG
+        2.45</li>
+      </ul>
+    </dd>
+
+    <dt>11 March 2005</dt>
+
+    <dd>
+      <ul>
+        <li>Added a hack that will fool PyDoc into working with Boost.Python,
+        thanks to Nick Rasmussen</li>
+      </ul>
+    </dd>
+
+    <dt>19 November 2004 - 1.32 release</dt>
+
+    <dd>
+      <ul>
+        <li>Updated to use the Boost Software License.</li>
+
+        <li>A new, <a href=
+        "tutorial/doc/html/python/exposing.html#python.class_virtual_functions">
+        better method of wrapping classes with virtual functions</a> has been
+        implemented.</li>
+
+        <li>Support for upcoming GCC symbol export control features have been
+        folded in, thanks to Niall Douglas.</li>
+
+        <li>Improved support for <code>std::auto_ptr</code>-like types.</li>
+
+        <li>The Visual C++ bug that makes top-level <i>cv-qualification</i>
+        of function parameter types part of the function type has been worked
+        around.</li>
+
+        <li>Components used by other libraries have been moved out of
+        <code>python/detail</code> and into <code>boost/detail</code> to
+        improve dependency relationships.</li>
+
+        <li>Miscellaneous bug fixes and compiler workarounds.</li>
+      </ul>
+    </dd>
+
+    <dt>8 Sept 2004</dt>
+
+    <dd>Support for Python's Bool type, thanks to <a href=
+    "mailto:dholth-at-fastmail.fm">Daniel Holth</a>.</dd>
+
+    <dt>11 Sept 2003</dt>
+
+    <dd>
+      <ul>
+        <li>Changed the response to multiple to-python converters being
+        registered for the same type from a hard error into warning;
+        Boost.Python now reports the offending type in the message.</li>
+
+        <li>Added builtin <code>std::wstring</code> conversions</li>
+
+        <li>Added <code>std::out_of_range</code> =&gt; Python
+        <code>IndexError</code> exception conversion, thanks to <a href=
+        "mailto:RaoulGough-at-yahoo.co.uk">Raoul Gough</a></li>
+      </ul>
+    </dd>
+
+    <dt>9 Sept 2003</dt>
+
+    <dd>Added new <code><a href="v2/str.html#str-spec">str</a></code></dd>
+
+    <dt>constructors which take a range of characters, allowing strings
+    containing nul (<code>'\0'</code>) characters.</dt>
+
+    <dt>8 Sept 2003</dt>
+
+    <dd>Added the ability to create methods from function objects (with an
+    <code>operator()</code>); see the <a href=
+    "v2/make_function.html#make_function-spec">make_function</a> docs for
+    more info.</dd>
+
+    <dt>10 August 2003</dt>
+
+    <dd>Added the new <code>properties</code> unit tests contributed by
+    <a href="mailto:romany-at-actimize.com">Roman Yakovenko</a> and
+    documented <code>add_static_property</code> at his urging.</dd>
+
+    <dt>1 August 2003</dt>
+
+    <dd>
+      Added the new <code>arg</code> class contributed by <a href=
+      "mailto:nickm-at-sitius.com">Nikolay Mladenov</a> which supplies the
+      ability to wrap functions that can be called with ommitted arguments in
+      the middle:
+      <pre>
+void f(int x = 0, double y = 3.14, std::string z = std::string("foo"));
+
+BOOST_PYTHON_MODULE(test)
+{
+   def("f", f
+       , (arg("x", 0), arg("y", 3.14), arg("z", "foo")));
+}
+ 
+</pre>And in Python:
+      <pre>
+&gt;&gt;&gt; import test
+&gt;&gt;&gt; f(0, z = "bar")
+&gt;&gt;&gt; f(z = "bar", y = 0.0)
+</pre>Thanks, Nikolay!
+    </dd>
+
+    <dt>22 July 2003</dt>
+
+    <dd>Killed the dreaded "bad argument type for builtin operation" error.
+    Argument errors now show the actual and expected argument types!</dd>
+
+    <dt>19 July 2003</dt>
+
+    <dd>Added the new <code><a href=
+    "v2/return_arg.html">return_arg</a></code> policy from <a href=
+    "mailto:nickm-at-sitius.com">Nikolay Mladenov</a>. Thanks, Nikolay!</dd>
+
+    <dt>18 March, 2003</dt>
+
+    <dd><a href="mailto:Gottfried.Ganssauge-at-haufe.de">Gottfried
+    Gan&szlig;auge</a> has contributed <a href=
+    "v2/opaque.html">opaque pointer support</a>.<br>
+    <a href="mailto:nicodemus-at-globalite.com.br">Bruno da Silva de
+    Oliveira</a> has contributed the exciting <a href=
+    "../pyste/index.html">Pyste</a> ("Pie-steh") package.</dd>
+
+    <dt>24 February 2003</dt>
+
+    <dd>Finished improved support for <code>boost::shared_ptr</code>. Now any
+    wrapped object of C++ class <code>X</code> can be converted automatically
+    to <code>shared_ptr&lt;X&gt;</code>, regardless of how it was wrapped.
+    The <code>shared_ptr</code> will manage the lifetime of the Python object
+    which supplied the <code>X</code>, rather than just the <code>X</code>
+    object itself, and when such a <code>shared_ptr</code> is converted back
+    to Python, the original Python object will be returned.</dd>
+
+    <dt>19 January 2003</dt>
+
+    <dd>Integrated <code>staticmethod</code> support from <a href=
+    "mailto:nickm-at-sitius.com">Nikolay Mladenov</a>. Thanks, Nikolay!</dd>
+
+    <dt>29 December 2002</dt>
+
+    <dd>Added Visual Studio project file and instructions from Brett Calcott.
+    Thanks, Brett!</dd>
+
+    <dt>20 December 2002</dt>
+
+    <dd>Added automatic downcasting for pointers, references, and smart
+    pointers to polymorphic class types upon conversion to python</dd>
+
+    <dt>18 December 2002</dt>
+
+    <dd>Optimized from_python conversions for wrapped classes by putting the
+    conversion logic in the shared library instead of registering separate
+    converters for each class in each extension module</dd>
+
+    <dt>19 November 2002</dt>
+
+    <dd>Removed the need for users to cast base class member function
+    pointers when used as arguments to <a href=
+    "v2/class.html#class_-spec-modifiers">add_property</a></dd>
+
+    <dt>13 December 2002</dt>
+
+    <dd>Allow exporting of <a href=
+    "v2/enum.html#enum_-spec"><code>enum_</code></a> values into enclosing
+    <a href="v2/scope.html#scope-spec"><code>scope</code></a>.<br>
+    Fixed unsigned integer conversions to deal correctly with numbers that
+    are out-of-range of <code>signed long</code>.</dd>
+
+    <dt>14 November 2002</dt>
+
+    <dd>Auto-detection of class data members wrapped with <a href=
+    "v2/data_members.html#make_getter-spec"><code>make_getter</code></a></dd>
+
+    <dt>13 November 2002</dt>
+
+    <dd>Full Support for <code>std::auto_ptr&lt;&gt;</code> added.</dd>
+
+    <dt>October 2002</dt>
+
+    <dd>Ongoing updates and improvements to tutorial documentation</dd>
+
+    <dt>10 October 2002</dt>
+
+    <dd>Boost.Python V2 is released!</dd>
+  </dl>
+  <hr>
+
+  <p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+   19 November 2004 
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" --></p>
+
+  <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+  Abrahams</a> 2002-2003.</i></p>
+</body>
+</html>

doc/overloading.html

@@ -1,155 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      Function Overloading
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="center"
-        src="../../../c++boost.gif" alt= "c++boost.gif (8819 bytes)">Function Overloading
-      </h1>
-
-<h2>An Example</h2>
-      <p>
-        To expose overloaded functions in Python, simply <code>def()</code> each
-        one with the same Python name:
-<blockquote>
-<pre>
-inline int f1() { return 3; }
-inline int f2(int x) { return x + 1; }
-
-class X {
-public:
-    X() : m_value(0) {}
-    X(int n) : m_value(n) {}
-    int value() const { return m_value; }
-    void value(int v) { m_value = v; }
-private:
-    int m_value;
-};
-  ...
-
-void initoverload_demo()
-{
-    try
-    {
-        boost::python::module_builder overload_demo("overload_demo");
-        // Overloaded functions at module scope
-        overload_demo.def(f1, "f");
-        overload_demo.def(f2, "f");
-
-        boost::python::class_builder&lt;X&gt; x_class(overload_demo, "X");
-        // Overloaded constructors
-        x_class.def(boost::python::constructor&lt;&gt;());
-        x_class.def(boost::python::constructor&lt;int&gt;());
-
-        // Overloaded member functions
-        x_class.def((int (X::*)() const)&amp;X::value, "value");
-        x_class.def((void (X::*)(int))&amp;X::value, "value");
-  ...
-</pre>
-</blockquote>
-
-      <p>
-        Now in Python:
-<blockquote>
-<pre>
->>> from overload_demo import *
->>> x0 = X()
->>> x1 = X(1)
->>> x0.value()
-0
->>> x1.value()
-1
->>> x0.value(3)
->>> x0.value()
-3
->>> X('hello')
-TypeError: No overloaded functions match (X, string). Candidates are:
-void (*)()
-void (*)(int)
->>> f()
-3
->>> f(4)
-5
-</pre>
-</blockquote>
-
-<h2>Discussion</h2>
-      <p>
-        Notice that overloading in the Python module was produced three ways:<ol>
-        <li>by combining the non-overloaded C++ functions <code>int f1()</code>
-        and <code>int f2(int)</code> and exposing them as <code>f</code> in Python.
-        <li>by exposing the overloaded constructors of <code>class X</code>
-        <li>by exposing the overloaded member functions <code>X::value</code>.
-        </ol>
-      <p>
-        Techniques 1. and 3. above are really alternatives. In case 3, you need
-        to form a pointer to each of the overloaded functions. The casting
-        syntax shown above is one way to do that in C++. Case 1 does not require
-        complicated-looking casts, but may not be viable if you can't change
-        your C++ interface. N.B. There's really nothing unsafe about casting an
-        overloaded (member) function address this way: the compiler won't let
-        you write it at all unless you get it right.
-
-<h2>An Alternative to Casting</h2>
-      <p>
-        This approach is not neccessarily better, but may be preferable for some
-        people who have trouble writing out the types of (member) function
-        pointers or simply prefer to avoid all casts as a matter of principle:
-<blockquote>
-<pre>
-// Forwarding functions for X::value
-inline void set_x_value(X&amp; self, int v) { self.value(v); }
-inline int get_x_value(X&amp; self) { return self.value(); }
-   ...
-        // Overloaded member functions
-        x_class.def(set_x_value, "value");
-        x_class.def(get_x_value, "value");
-</pre>
-</blockquote>
-<p>Here we are taking advantage of the ability to expose C++ functions at
-namespace scope as Python member functions.
-
-<h2>Overload Resolution</h2>
-      <p>
-        The function overload resolution mechanism  works as follows:
-
-        <ul>
-
-        <li>Attribute lookup for extension classes proceeds in <a
-        href="http://www.pythonlabs.com/pub/www.python.org/doc/current/tut/node11.html#SECTION0011510000000000000000">the
-        usual Python way</a> using a depth-first, left-to-right search. When a
-        class is found which has a matching attribute, only functions overloaded
-        in the context of that class are candidates for overload resolution. In
-        this sense, overload resolution mirrors the C++ mechanism, where a name
-        in a derived class ``hides'' all functions with the same name from a base
-        class.
-        <p>
-
-        <li>Within a name-space context (extension class or module), overloaded
-        functions are tried in the same order they were
-        <code>def()</code>ed. The first function whose signature can be made to
-        match each argument passed is the one which is ultimately called. 
-        This means in particular that you cannot overload the same function on 
-        both ``<code>int</code>'' and ``<code>float</code>'' because Python 
-        automatically converts either of the two types into the other one. 
-        If the ``<code>float</code>'' overload is found first, it is used 
-        also used for arguments of type ``<code>int</code>'' as well, and the 
-        ``<code>int</code>'' version of the function is never invoked.
-        </ul>
-
-      <p>
-         Next: <a href="inheritance.html">Inheritance</a>
-         Previous: <a href="overriding.html">Overridable Virtual Functions</a>
-         Up: <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided ``as
-        is'' without express or implied warranty, and with no claim as to
-        its suitability for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/overriding.html

@@ -1,195 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
-    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
-
-    <title>Overridable Virtual Functions</title>
-
-    <img src="../../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="center"
-    width="277" height="86"> 
-
-    <h1>Overridable Virtual Functions</h1>
-
-<p> 
-  In the <a href="example1.html">previous example</a> we exposed a simple
-  C++ class in Python and showed that we could write a subclass. We even
-  redefined one of the functions in our derived class. Now we will learn
-  how to make the function behave virtually <em>when called from C++</em>. 
-
-
-<h2><a name="overriding_example">Example</a></h2>
-
-<p>In this example, it is assumed that <code>world::greet()</code> is a virtual
-member function:
-
-<blockquote><pre>
-class world
-{
- public:
-    world(int);
-    virtual ~world();
-    <b>virtual</b> std::string greet() const { return "hi, world"; }
-};
-</pre></blockquote>
-
-<p>
-  We'll need a derived class<a href="#why_derived">*</a> to help us
-  dispatch the call to Python. In our derived class, we need the following
-  elements:
-
-<ol>
-
-  <li><a name="derived_1">A</a> <code>PyObject*</code> data member that holds a
-  reference to the corresponding Python object.
-
-  <li><a name="derived_2">A</a> constructor for each exposed constructor of the
-  base class which stores an additional initial <code>PyObject*</code> argument
-  in the data member described above.
-
-  <li><a name="derived_3">An</a> implementation of each virtual function you may
-  wish to override in Python which uses
-  <code>boost::python::callback&lt<i>return-type</i>&gt;::call_method()</code> to call
-  the Python override.
-
-  <li><a name="derived_4">For</a> each non-pure virtual function meant to be
-  overridable from Python, a static member function (or a free function) taking
-  a reference or pointer to the base type as the first parameter and which
-  forwards any additional parameters neccessary to the <i>default</i>
-  implementation of the virtual function. See also <a href="#private">this
-  note</a> if the base class virtual function is private.
-
-</ol>
-
-<blockquote><pre>
-struct world_callback : world
-{
-    world_callback(PyObject* self, int x) // <a href="#derived_2">2</a>
-        : world(x),
-          m_self(self) {}
-
-    std::string greet() const // <a href="#derived_3">3</a>
-        { return boost::python::callback&lt;std::string&gt;::call_method(m_self, "get"); }
-
-    static std::string <a name= "default_implementation">default_get</a>(const hello::world& self) const // <a href="#derived_4">4</a>
-        { return self.world::greet(); }
- private:
-    PyObject* m_self; // <a href="#derived_1">1</a>
-};
-</pre></blockquote>
-
-<p>
-  Finally, we add <code>world_callback</code> to the <code>
-  class_builder&lt;&gt;</code> declaration in our module initialization
-  function, and when we define the function, we must tell py_cpp about the default
-  implementation:
-
-<blockquote><pre>
-// Create the <a name=
-"world_class">Python type object</a> for our extension class
-boost::python::class_builder&lt;hello::world<strong>,world_callback&gt;</strong> world_class(hello, "world");
-// Add a virtual member function
-world_class.def(&amp;world::get, "get", &amp;<b>world_callback::default_get</b>);
-</pre></blockquote>
-
-<p>
- Now our subclass of <code>hello.world</code> behaves as expected:
-
-<blockquote><pre>
-&gt;&gt;&gt; class my_subclass(hello.world):
-...     def greet(self):
-...         return 'hello, world'
-...
-&gt;&gt;&gt; hello.length(my_subclass())
-12
-</pre></blockquote>
-
-    <p>
-      <a name="why_derived">*</a>You may ask, "Why do we need this derived
-      class? This could have been designed so that everything gets done right
-      inside of <code>hello::world</code>." One of the goals of py_cpp is to be
-      minimally intrusive on an existing C++ design. In principle, it should be
-      possible to expose the interface for a 3rd party library without changing
-      it. To unintrusively hook into the virtual functions so that a Python
-      override may be called, we must use a derived class.
-
-<h2>Pure Virtual Functions</h2>
-
-    <p>
-      A pure virtual function with no implementation is actually a lot easier to
-      deal with than a virtual function with a default implementation. First of
-      all, you obviously don't need to <a href="#default_implementation"> supply
-      a default implementation</a>. Secondly, you don't need to call
-      <code>def()</code> on the <code>extension_class&lt;&gt;</code> instance
-      for the virtual function. In fact, you wouldn't <em>want</em> to: if the
-      corresponding attribute on the Python class stays undefined, you'll get an
-      <code>AttributeError</code> in Python when you try to call the function,
-      indicating that it should have been implemented. For example:
-    <blockquote>
-<pre>
-struct baz {
-    <strong>virtual</strong> int pure(int) = 0;
-};
-
-struct baz_callback {
-    int pure(int x) { boost::python::callback&lt;int&gt;::call_method(m_self, "pure", x); }
-};
-
-extern "C"
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-initfoobar()
-{
-    try
-    {
-       boost::python::module_builder foobar("foobar");
-       boost::python::class_builder&lt;baz,baz_callback&gt; baz_class("baz");
-       baz_class.def(&amp;baz::pure, "pure");
-    }
-    catch(...)
-    {
-       boost::python::handle_exception();    // Deal with the exception for Python
-    }
-}
-</pre>
-    </blockquote>
-    <p>
-      Now in Python:
-    <blockquote>
-<pre>
-&gt;&gt;&gt; from foobar import baz
-&gt;&gt;&gt; x = baz()
-&gt;&gt;&gt; x.pure(1)
-Traceback (innermost last):
-  File "&lt;stdin&gt;", line 1, in ?
-AttributeError: pure
-&gt;&gt;&gt; class mumble(baz):
-...    def pure(self, x): return x + 1
-...
-&gt;&gt;&gt; y = mumble()
-&gt;&gt;&gt; y.pure(99)
-100
-</pre></blockquote>
-
-<a name="private"><h2>Private Non-Pure Virtual Functions</h2></a>
-
-<p>This is one area where some minor intrusiveness on the wrapped library is
-required. Once it has been overridden, the only way to call the base class
-implementation of a private virtual function is to make the derived class a
-friend of the base class. You didn't hear it from me, but most C++
-implementations will allow you to change the declaration of the base class in
-this limited way without breaking binary compatibility (though it will certainly
-break the <a
-href="http://cs.calvin.edu/c++/C++Standard-Nov97/basic.html#basic.def.odr">ODR</a>).
-
-    <p>
-      Next: <a href="overloading.html">Function Overloading</a>
-      Previous: <a href="example1.html">A Simple Example Using py_cpp</a>
-      Up: <a href="index.html">Top</a>
-    <p>
-      &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-      sell and distribute this document is granted provided this copyright
-      notice appears in all copies. This document is provided "as is" without
-      express or implied warranty, and with no claim as to its suitability for
-      any purpose.
-    <p>
-      Updated: Nov 26, 2000
-

doc/pointers.html

@@ -1,148 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      Pointers
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="center"
-        src="../../../c++boost.gif" alt= "c++boost.gif (8819 bytes)">Pointers
-      </h1>
-
-<h2><a name="problem">The Problem With Pointers</a></h2>
-
-      <p>
-In general, raw pointers passed to or returned from functions are problematic
-for BPL because pointers have too many potential meanings. Is it an iterator?
-A pointer to a single element? An array? When used as a return value, is the
-caller expected to manage (delete) the pointed-to object or is the pointer
-really just a reference? If the latter, what happens to Python references to the
-referent when some C++ code deletes it?
-<p>
-There are a few cases in which pointers are converted automatically:
-<ul>
-
-<li>Both const- and non-const pointers to wrapped class instances can be passed
-<i>to</i> C++ functions. 
-
-<li>Values of type <code>const char*</code> are interpreted as
-null-terminated 'C' strings and when passed to or returned from C++ functions are
-converted from/to Python strings.
-
-</ul>
-
-<h3>Can you avoid the problem?</h3>
-
-<p>My first piece of advice to anyone with a case not covered above is
-``find a way to avoid the problem.'' For example, if you have just one
-or two functions that return a pointer to an individual <code>const
-T</code>, and <code>T</code> is a wrapped class, you may be able to write a ``thin
-converting wrapper'' over those two functions as follows:
-
-<blockquote><pre>
-const Foo* f(); // original function
-const Foo& f_wrapper() { return *f(); }
-  ...
-my_module.def(f_wrapper, "f");
-</pre></blockquote>
-<p>
-Foo must have a public copy constructor for this technique to work, since BPL
-converts <code>const T&</code> values <code>to_python</code> by copying the <code>T</code>
-value into a new extension instance.
-
-<h2>Dealing with the problem</h2>
-
-<p>The first step in handling the remaining cases is to figure out what the pointer
-means. Several potential solutions are provided in the examples that follow:
-
-<h3>Returning a pointer to a wrapped type</h3>
-
-<h4>Returning a const pointer</h4>
-
-<p>If you have lots of functions returning a <code>const T*</code> for some
-wrapped <code>T</code>, you may want to provide an automatic
-<code>to_python</code> conversion function so you don't have to write lots of
-thin wrappers. You can do this simply as follows:
-
-<blockquote><pre>
-BOOST_PYTHON_BEGIN_CONVERSION_NAMESPACE // this is a gcc 2.95.2 bug workaround
-  PyObject* to_python(const Foo* p) {
-     return to_python(*p); // convert const Foo* in terms of const Foo&
-  }
-BOOST_PYTHON_END_CONVERSION_NAMESPACE
-</pre></blockquote>
-
-<h4>If you can't (afford to) copy the referent, or the pointer is non-const</h4>
-
-<p>If the wrapped type doesn't have a public copy constructor, if copying is
-<i>extremely</i> costly (remember, we're dealing with Python here), or if the
-pointer is non-const and you really need to be able to modify the referent from
-Python, you can use the following dangerous trick. Why dangerous? Because python
-can not control the lifetime of the referent, so it may be destroyed by your C++
-code before the last Python reference to it disappears:
-
-<blockquote><pre>
-BOOST_PYTHON_BEGIN_CONVERSION_NAMESPACE // this is a gcc 2.95.2 bug workaround
-  PyObject* to_python(Foo* p)
-  {
-      return boost::python::PyExtensionClassConverters<Foo>::ptr_to_python(p);
-  }
-
-  PyObject* to_python(const Foo* p)
-  {
-      return to_python(const_cast<Foo*>(p));
-  }
-BOOST_PYTHON_END_CONVERSION_NAMESPACE
-</pre></blockquote>
-
-This will cause the Foo* to be treated as though it were an owning smart
-pointer, even though it's not. Be sure you don't use the reference for anything
-from Python once the pointer becomes invalid, though. Don't worry too much about
-the <code>const_cast&lt;&gt;</code> above: Const-correctness is completely lost
-to Python anyway!
-
-<h3>[In/]Out Parameters and Immutable Types</h3>
-
-<p>If you have an interface that uses non-const pointers (or references) as
-in/out parameters to types which in Python are immutable (e.g. int, string),
-there simply is <i>no way</i> to get the same interface in Python. You must
-resort to transforming your interface with simple thin wrappers as shown below:
-<blockquote><pre>
-const void f(int* in_out_x); // original function
-const int f_wrapper(int in_x) { f(in_x); return in_x; }
-  ...
-my_module.def(f_wrapper, "f");
-</pre></blockquote>
-
-<p>Of course, [in/]out parameters commonly occur only when there is already a
-return value. You can handle this case by returning a Python tuple:
-<blockquote><pre>
-typedef unsigned ErrorCode;
-const char* f(int* in_out_x); // original function
- ...
-#include &lt;boost/python/objects.hpp&gt;
-const boost::python::tuple f_wrapper(int in_x) { 
-  const char* s = f(in_x); 
-  return boost::python::tuple(s, in_x);
-}
-  ...
-my_module.def(f_wrapper, "f");
-</pre></blockquote>
-<p>Now, in Python:
-<blockquote><pre>
-&gt;&gt;&gt; str,out_x = f(3)
-</pre></blockquote>
-
-<p>
-         Previous: <a href="enums.html">Enums</a>
-         Up: <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided "as is" without
-        express or implied warranty, and with no claim as to its suitability
-        for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/polymorphism.txt

@@ -0,0 +1,222 @@
+.. Copyright David Abrahams 2006. Distributed under the Boost
+.. Software License, Version 1.0. (See accompanying
+.. file LICENSE_1_0.txt or copy at
+.. http://www.boost.org/LICENSE_1_0.txt)
+
+How Runtime Polymorphism is expressed in Boost.Python:
+-----------------------------------------------------
+
+   struct A { virtual std::string f(); virtual ~A(); };
+
+   std::string call_f(A& x) { return x.f(); }
+
+   struct B { virtual std::string f() { return "B"; } };
+
+   struct Bcb : B
+   { 
+      Bcb(PyObject* self) : m_self(self) {}
+
+      virtual std::string f() { return call_method<std::string>(m_sef, "f"); }
+      static std::string f_default(B& b) { return b.B::f(); }
+
+      PyObject* m_self;
+   };
+
+   struct C : B
+   {
+      virtual std::string f() { return "C"; }
+   };
+
+   >>> class D(B):
+   ...     def f():
+   ...         return 'D'
+   ...
+   >>> class E(B): pass
+   ...
+
+
+When we write, "invokes B::f non-virtually", we mean:
+
+  void g(B& x) { x.B::f(); }
+
+This will call B::f() regardless of the dynamic type of x. Any other
+way of invoking B::f, including through a function pointer, is a
+"virtual invocation", and will call the most-derived override of f().
+
+Case studies
+
+   C++\Python class
+       \___A_____B_____C_____D____E___
+       |
+   A   |   1
+       |
+   B   |   2     3
+       |
+   Bcb |         4           5    6
+       |
+   C   |         7     8
+       |
+
+
+1. Simple case
+
+2. Python A holds a B*. Probably won't happen once we have forced
+   downcasting. 
+
+   Requires:
+         x.f() -> 'B'
+         call_f(x) -> 'B'
+
+   Implies: A.f invokes A::f() (virtually or otherwise)
+
+3. Python B holds a B*. 
+
+   Requires:
+        x.f() -> 'B'
+        call_f(x) -> 'B'
+   
+   Implies: B.f invokes B::f (virtually or otherwise)
+
+
+4. B constructed from Python
+
+   Requires:
+
+        x.f() -> 'B'
+        call_f(x) -> 'B'
+
+   Implies: B.f invokes B::f non-virtually. Bcb::f invokes B::f
+            non-virtually.
+
+   Question: Does it help if we arrange for Python B construction to
+   build a true B object? Then this case doesn't arise.
+
+
+5. D is a Python class derived from B
+
+   Requires:
+
+        x.f() -> 'D'
+        call_f(x) -> 'D'
+
+   Implies: Bcb::f must invoke call_method to look up the Python
+            method override, otherwise call_f wouldn't work.
+
+6. E is like D, but doesn't override f
+
+   Requires:
+
+        x.f() -> 'B'
+        call_f(x) -> 'B'
+
+   Implies: B.f invokes B::f non-virtually. If it were virtual, x.f()
+            would cause infinite recursion, because we've already
+            determined that Bcb::f must invoke call_method to look up
+            the Python method override.
+
+7. Python B object holds a C*
+
+   Requires:
+        
+        x.f() -> 'C'
+        call_f(x) -> 'C'
+
+   Implies: B.f invokes B::f virtually. 
+
+8. C object constructed from Python
+
+   Requires:
+
+        x.f() -> 'C'
+        call_f(x) -> 'C'
+
+   Implies: nothing new.
+
+------
+
+Total implications:
+
+2: A.f invokes A::f() (virtually or otherwise)
+3: B.f invokes B::f (virtually or otherwise)
+4: B.f invokes B::f non-virtually. Bcb::f invokes B::f non-virtually
+6: B.f invokes B::f non-virtually. 
+7: B.f invokes B::f virtually. 
+
+5: Bcb::f invokes call_method to look up the Python method
+
+Though (4) is avoidable, clearly 6 and 7 are not, and they
+conflict. The implication is that B.f must choose its behavior
+according to the type of the contained C++ object. If it is Bcb, a
+non-virtual call to B::f must occur. Otherwise, a virtual call to B::f
+must occur. This is essentially the same scheme we had with
+Boost.Python v1.
+
+Note: in early versions of Boost.Python v1, we solved this problem by
+introducing a new Python class in the hierarchy, so that D and E
+actually derive from a B', and B'.f invokes B::f non-virtually, while
+B.f invokes B::f virtually. However, people complained about the
+artificial class in the hierarchy, which was revealed when they tried
+to do normal kinds of Python introspection.
+
+-------
+
+Assumption: we will have a function which builds a virtual function
+dispatch callable Python object.
+
+     make_virtual_function(pvmf, default_impl, call_policies, dispatch_type)
+
+Pseudocode:
+
+     Get first argument from Python arg tuple
+     if it contains dispatch_type
+        call default_impl
+     else
+        call through pvmf
+
+
+Open questions:
+
+   1. What about Python multiple inheritance? Do we have the right
+      check in the if clause above?
+      
+      A: Not quite. The correct test looks like:
+
+      Deduce target type of pvmf, i.e. T in R(T::*)(A1...AN).
+      Find holder in first argument which holds T
+      if it holds dispatch_type...
+
+   2. Can we make this more efficient?
+     
+     The current "returning" mechanism will look up a holder for T
+     again. I don't know if we know how to avoid that.
+
+
+  OK, the solution involves reworking the call mechanism. This is
+  neccesary anyway in order to enable wrapping of function objects.
+
+  It can result in a reduction in the overall amount of source code,
+  because returning<> won't need to be specialized for every
+  combination of function and member function... though it will still
+  need a void specialization. We will still need a way to dispatch to
+  member functions through a regular function interface. mem_fn is
+  almost the right tool, but it only goes up to 8
+  arguments. Forwarding is tricky if you don't want to incur copies.
+  I think the trick is to use arg_from_python<T>::result_type for each
+  argument to the forwarder.
+
+  Another option would be to use separate function, function object,
+  and member function dispatchers. Once you know you have a member
+  function, you don't need cv-qualified overloads to call it.
+
+  Hmm, while we're at this, maybe we should solve the write-back
+  converter problem. Can we do it? Maybe not. Ralf doesn't want to
+  write special write-back functions here, does he? He wants the
+  converter to do the work automatically. We could add
+  cleanup/destructor registration. That would relieve the client from
+  having accessible destructors for types which are being converted by
+  rvalue. I'm not sure that this will really save any code,
+  however. It rather depends on the linker, doesn't it? I wonder if
+  this can be done in a backwards-compatible fashion by generating the
+  delete function when it's not supplied?
+
+  

doc/projects.html

@@ -0,0 +1,466 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+  <meta name="generator" content=
+  "HTML Tidy for Cygwin (vers 1st September 2004), see www.w3.org">
+  <meta http-equiv="Content-Type" content="text/html">
+  <link rel="stylesheet" type="text/css" href="boost.css">
+
+  <title>Boost.Python - Projects using Boost.Python</title>
+</head>
+
+<body link="#0000FF" vlink="#800080">
+  <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+  "header">
+    <tr>
+      <td valign="top" width="300">
+        <h3><a href="../../../index.htm"><img height="86" width="277" alt=
+        "C++ Boost" src="../../../boost.png" border="0"></a></h3>
+      </td>
+
+      <td valign="top">
+        <h1 align="center"><a href="index.html">Boost.Python</a></h1>
+
+        <h2 align="center">Projects using Boost.Python</h2>
+      </td>
+    </tr>
+  </table>
+  <hr>
+
+  <h2>Introduction</h2>
+
+  <p>This is a partial list of projects using Boost.Python. If you are using
+  Boost.Python as your Python/C++ binding solution, we'd be proud to list
+  your project on this page. Just <a href=
+  "mailto:c++-sig@python.org">post</a> a short description of your project
+  and how Boost.Python helps you get the job done, and we'll add it to this
+  page .</p>
+  <hr>
+
+  <h3>Data Analysis</h3>
+
+  <dl class="page-index">
+    <dt><b><a href="http://www.neuralynx.com">NeuraLab</a></b></dt>
+
+    <dd>Neuralab is a data analysis environment specifically tailored for
+    neural data from <a href="http://www.neuralynx.com">Neuralynx</a>
+    acquisition systems. Neuralab combines presentation quality graphics, a
+    numerical analysis library, and the <a href=
+    "http://www.python.org">Python</a> scripting engine in a single
+    application. With Neuralab, Neuralynx users can perform common analysis
+    tasks with just a few mouse clicks. More advanced users can create custom
+    Python scripts, which can optionally be assigned to menus and mouse
+    clicks.</dd>
+  </dl>
+
+  <dl class="page-index">
+    <dt><b>TSLib</b> - <a href="http://www.fortressinv.com">Fortress
+    Investment Group LLC</a></dt>
+
+    <dd>
+      Fortress Investment Group has contracted <a href=
+      "http://www.boost-consulting.com">Boost Consulting</a> to develop core
+      internal financial analysis tools in C++ and to prepare Python bindings
+      for them using Boost.Python.
+
+      <p>Tom Barket of Fortress writes:</p>
+
+      <blockquote>
+        We have a large C++ analytical library specialized for research in
+        finance and economics, built for speed and mission critical
+        stability. Yet Python offers us the flexibility to test out new ideas
+        quickly and increase the productivity of our time versus working in
+        C++. There are several key features which make Python stand out. Its
+        elegance, stability, and breadth of resources on the web are all
+        valuable, but the most important is its extensibility, due to its
+        open source transparency. Boost.Python makes Python extensibility
+        extremely simple and straightforward, yet preserves a great deal of
+        power and control.
+      </blockquote>
+    </dd>
+  </dl>
+
+  <h3>Educational</h3>
+
+  <dl class="page-index">
+    <dt><a href="http://edu.kde.org/kig"><b>Kig</b></a></dt>
+
+    <dd>
+      <p>KDE Interactive Geometry is a high-school level educational tool,
+      built for the KDE desktop. It is a nice tool to let students work with
+      geometrical constructions. It is meant to be the most intuitive, yet
+      featureful application of its kind.</p>
+
+      <p>Versions after 0.6.x (will) support objects built by the user
+      himself in the Python language. The exporting of the relevant internal
+      API's were done using Boost.Python, which made the process very
+      easy.</p>
+    </dd>
+  </dl>
+
+  <h3>Enterprise Software</h3>
+
+  <dl class="page-index">
+    <dt><b><a href="http://openwbem.sourceforge.net">OpenWBEM</a></b></dt>
+
+    <dd>
+      The OpenWBEM project is an effort to develop an open-source
+      implementation of Web Based Enterprise Management suitable for
+      commercial and non-commercial application
+
+      <p><a href="mailto:dnuffer@sco.com">Dan Nuffer</a> writes:</p>
+
+      <blockquote>
+        I'm using Boost.Python to wrap the client API of OpenWBEM.This will
+        make it easier to do rapid prototyping, testing, and scripting when
+        developing management solutions that use WBEM.
+      </blockquote>
+    </dd>
+
+    <dt><b><a href="http://www.transversal.com">Metafaq</a></b></dt>
+
+    <dd>
+      Metafaq, from <a href="http://www.transversal.com">Transversal,
+      Inc.</a>, is an enterprise level online knowledge base management
+      system.
+
+      <p><a href="mailto:ben.young-at-transversal.com">Ben Young</a>
+      writes:</p>
+
+      <blockquote>
+        Boost.Python is used in an automated process to generate python
+        bindings to our api which is exposed though multiple backends and
+        frontends. This allows us to write quick tests and bespoke scripts to
+        perform one off tasks without having to go through the full
+        compilation cycle.
+      </blockquote>
+    </dd>
+  </dl>
+
+  <h3>Games</h3>
+
+  <dl>
+    <dt><b><a href="http://www.firaxis.com">Civilization IV</a></b></dt>
+  </dl>
+
+  <blockquote>
+    &ldquo;The fourth game in the PC strategy series that has sold over five
+    million copies, Sid Meier's Civilization IV is a bold step forward for
+    the franchise, with spectacular new 3D graphics and all-new single and
+    multiplayer content. Civilization IV will also set a new standard for
+    user-modification, allowing gamers to create their own add-ons using
+    Python and XML.
+
+    <p>Sid Meier's Civilization IV will be released for PC in late 2005. For
+    more information please visit <a href=
+    "http://www.firaxis.com">http://www.firaxis.com</a> or write <a href=
+    "mailto:kgilmore@firaxis.com">kgilmore@firaxis.com</a>&rdquo;</p>
+  </blockquote>
+
+  <p>Boost.Python is used as the interface layer between the C++ game code
+  and Python. Python is used for many purposes in the game, including map
+  generation, interface screens, game events, tools, tutorials, etc. Most
+  high-level game operations have been exposed to Python in order to give
+  modders the power they need to customize the game.</p>
+
+  <blockquote>
+    -Mustafa Thamer, Civ4 Lead Programmer
+  </blockquote>
+
+  <dl class="page-index">
+    <dt><b><a href="http://vegastrike.sourceforge.net">Vega
+    Strike</a></b></dt>
+
+    <dd>
+      <a href="http://vegastrike.sourceforge.net">Vega Strike</a> is the 3D
+      Space Simulator that allows you to trade and bounty hunt in a vast
+      universe. Players face dangers, decisions, piracy, and aliens.
+
+      <p><a href="http://vegastrike.sourceforge.net">Vega Strike</a> has
+      decided to base its scripting on python, using boost as the layer
+      between the class hierarchy in python and the class hierarchy in C++.
+      The result is a very flexible scripting system that treats units as
+      native python classes when designing missions or writing AI's.</p>
+
+      <p>A large economic and planetary simulation is currently being run in
+      the background in python and the results are returned back into C++ in
+      the form of various factions' spaceships appearing near worlds that
+      they are simulated to be near in python if the player is in the general
+      neighborhood.</p>
+    </dd>
+  </dl>
+
+  <h3>Graphics</h3>
+
+  <dl class="page-index">
+    <dt><b><a href="http://sourceforge.net/projects/pyosg">OpenSceneGraph
+    Bindings</a></b></dt>
+
+    <dd><a href="mailto:gideon@computer.org">Gideon May</a> has created a set
+    of bindings for <a href=
+    "http://www.openscenegraph.org">OpenSceneGraph</a>, a cross-platform
+    C++/OpenGL library for the real-time visualization.<br>
+    &nbsp;</dd>
+
+    <dt><b><a href=
+    "http://www.slac.stanford.edu/grp/ek/hippodraw/index.html">HippoDraw</a></b></dt>
+
+    <dd>
+      HippoDraw is a data analysis environment consisting of a canvas upon
+      which graphs such as histograms, scattter plots, etc, are prsented. It
+      has a highly interactive GUI interface, but some things you need to do
+      with scripts. HippoDraw can be run as Python extension module so that
+      all the manipulation can be done from either Python or the GUI.
+
+      <p>Before the web page came online, <a href=
+      "mailto:Paul_Kunz@SLAC.Stanford.EDU">Paul F. Kunz</a> wrote:</p>
+
+      <blockquote>
+        Don't have a web page for the project, but the organization's is
+        <a href=
+        "http://www.slac.stanford.edu">http://www.slac.stanford.edu</a> (the
+        first web server site in America, I installed it).
+      </blockquote>Which was just too cool a piece of trivia to omit.<br>
+      &nbsp;
+    </dd>
+
+    <dt><a href="http://www.iplt.org"><b>IPLT</b></a></dt>
+
+    <dd>
+      <a href="mailto:ansgar.philippsen-at-unibas.ch">Ansgar Philippsen</a>
+      writes:
+
+      <blockquote>
+        IPLT is an image processing library and toolbox for the structural
+        biology electron microscopy community. I would call it a
+        budding/evolving project, since it is currently not in production
+        stage, but rather under heavy development. Python is used as the main
+        scripting/interaction level, but also for rapid prototyping, since
+        the underlying C++ class library is pretty much fully exposed via
+        boost.python (at least the high-level interface). The combined power
+        of C++ and Python for this project turned out to be just awesome.
+      </blockquote><br>
+      &nbsp;
+    </dd>
+
+    <dt><a href=
+    "http://www.procoders.net/pythonmagick"><b>PythonMagick</b></a></dt>
+
+    <dd>PythonMagick binds the <a href=
+    "http://www.graphicsmagick.org">GraphicsMagick</a> image manipulation
+    library to Python.<br>
+    &nbsp;</dd>
+
+    <dt><a href="http://www.vpython.org"><b>VPython</b></a></dt>
+
+    <dd>
+      <a href="mailto:Bruce_Sherwood-at-ncsu.edu">Bruce Sherwood</a> writes:
+
+      <blockquote>
+        VPython is an extension for Python that makes it easy to create
+        navigable 3D animations, which are generated as a side effect of
+        computational code. VPython is used in education for various
+        purposes, including teaching physics and programming, but it has also
+        been used by research scientists to visualize systems or data in 3D.
+      </blockquote><br>
+      &nbsp;
+    </dd>
+  </dl>
+
+  <h3>Scientific Computing</h3>
+
+  <dl class="page index">
+    <dt><a href="http://camfr.sourceforge.net"><b>CAMFR</b></a></dt>
+
+    <dd>
+      CAMFR is a photonics and electromagnetics modelling tool. Python is
+      used for computational steering.
+
+      <p><a href="mailto:Peter.Bienstman@rug.ac.be">Peter Bienstman</a>
+      writes:</p>
+
+      <blockquote>
+        Thanks for providing such a great tool!
+      </blockquote>
+    </dd>
+
+    <dt><a href="http://cctbx.sourceforge.net"><b>cctbx - Computational
+    Crystallography Toolbox</b></a></dt>
+
+    <dd>
+      Computational Crystallography is concerned with the derivation of
+      atomic models of crystal structures, given experimental X-ray
+      diffraction data. The cctbx is an open-source library of fundamental
+      algorithms for crystallographic computations. The core algorithms are
+      implemented in C++ and accessed through higher-level Python interfaces.
+
+      <p>The cctbx grew together with Boost.Python and is designed from the
+      ground up as a hybrid Python/C++ system. With one minor exception,
+      run-time polymorphism is completely handled by Python. C++ compile-time
+      polymorphism is used to implement performance critical algorithms. The
+      Python and C++ layers are seamlessly integrated using Boost.Python.</p>
+
+      <p>The SourceForge cctbx project is organized in modules to facilitate
+      use in non-crystallographic applications. The scitbx module implements
+      a general purpose array family for scientific applications and pure C++
+      ports of FFTPACK and the L-BFGS quasi-Newton minimizer.</p>
+    </dd>
+
+    <dt><a href="http://www.llnl.gov/CASC/emsolve"><b>EMSolve</b></a></dt>
+
+    <dd>EMSolve is a provably stable, charge conserving, and energy
+    conserving solver for Maxwell's equations.<br>
+    &nbsp;</dd>
+
+    <dt><b><a href="http://cern.ch/gaudi">Gaudi</a></b> and <b><a href=
+    "http://cern.ch/Gaudi/RootPython/">RootPython</a></b></dt>
+
+    <dd>
+      Gaudi is a framework for particle physics collision data processing
+      applications developed in the context of the LHCb and ATLAS experiments
+      at CERN.
+
+      <p><a href="mailto:Pere.Mato@cern.ch">Pere Mato Vila</a> writes:</p>
+
+      <blockquote>
+        We are using Boost.Python to provide scripting/interactive capability
+        to our framework. We have a module called "GaudiPython" implemented
+        using Boost.Python that allows the interaction with any framework
+        service or algorithm from python. RootPython also uses Boost.Python
+        to provide a generic "gateway" between the <a href=
+        "http://root.cern.ch">ROOT</a> framework and python
+
+        <p>Boost.Python is great. We managed very quickly to interface our
+        framework to python, which is great language. We are trying to
+        facilitate to our physicists (end-users) a rapid analysis application
+        development environment based on python. For that, Boost.Python plays
+        and essential role.</p>
+      </blockquote>
+    </dd>
+
+    <dt><b><a href="http://www.esss.com.br">ESSS</a></b></dt>
+
+    <dd>
+      ESSS (Engineering Simulation and Scientific Software) is a company that
+      provides engineering solutions and acts in the brazilian and
+      south-american market providing products and services related to
+      Computational Fluid Dynamics and Image Analysis.
+
+      <p><a href="mailto:bruno@esss.com.br">Bruno da Silva de Oliveira</a>
+      writes:</p>
+
+      <blockquote>
+        Recently we moved our work from working exclusively with C++ to an
+        hybrid-language approach, using Python and C++, with Boost.Python
+        providing the layer between the two. The results are great so far!
+      </blockquote>
+
+      <p>Two projects have been developed so far with this technology:</p>
+
+      <p><b><a href=
+      "http://www.esss.com.br/index.php?pg=dev_projetos">Simba</a></b>
+      provides 3D visualization of geological formations gattered from the
+      simulation of the evolution of oil systems, allowing the user to
+      analyse various aspects of the simulation, like deformation, pressure
+      and fluids, along the time of the simulation.</p>
+
+      <p><b><a href=
+      "http://www.esss.com.br/index.php?pg=dev_projetos">Aero</a></b> aims to
+      construct a CFD with brazilian technology, which involves various
+      companies and universities. ESSS is responsible for various of the
+      application modules, including GUI and post-processing of results.</p>
+    </dd>
+
+    <dt><b><a href="http://polybori.sourceforge.net/">PolyBoRi</a></b></dt>
+
+    <dd>
+      <p><a href="mailto:brickenstein@mfo.de"
+        >Michael Brickenstein</a> writes:</p>
+
+      <blockquote>
+        <p>The core of PolyBoRi is a C++ library, which provides
+        high-level data types for Boolean polynomials and monomials,
+        exponent vectors, as well as for the underlying polynomial
+        rings and subsets of the powerset of the Boolean variables. As
+        a unique approach, binary decision diagrams are used as
+        internal storage type for polynomial structures. On top of
+        this C++-library we provide a Python interface. This allows
+        parsing of complex polynomial systems, as well as sophisticated
+        and extendable strategies for Gr&ouml;bner basis computation.
+        Boost.Python has helped us to create this interface in a
+        very clean way.</p>
+      </blockquote>
+    </dd>
+
+    <dt><b><a href="http://www.rationaldiscovery.com">Rational Discovery
+    LLC</a></b></dt>
+
+    <dd>
+      Rational Discovery provides computational modeling, combinatorial
+      library design and custom software development services to the
+      pharmaceutical, biotech and chemical industries. We do a substantial
+      amount of internal research to develop new approaches for applying
+      machine-learning techniques to solve chemical problems. Because we're a
+      small organization and chemistry is a large and complex field, it is
+      essential that we be able to quickly and easily prototype and test new
+      algorithms.
+
+      <p>For our internal software, we implement core data structures in C
+      and expose them to Python using Boost.Python. Algorithm development is
+      done in Python and then translated to C if required (often it's not).
+      This hybrid development approach not only greatly increases our
+      productivity, but it also allows "non-developers" (people without C
+      experience) to take part in method development. Learning C is a
+      daunting task, but "Python fits your brain." (Thanks to Bruce Eckel for
+      the quote.)</p>
+    </dd>
+  </dl>
+
+  <h3>Systems Libraries</h3>
+
+  <dl>
+    <dt><a href="http://itamarst.org/software"><b>Fusion</b></a></dt>
+
+    <dd>
+      <p>Fusion is a library that supports implementing protocols in C++ for
+      use with Twisted, allowing control over memory allocation strategies,
+      fast method calls internally, etc.. Fusion supports TCP, UDP and
+      multicast, and is implemented using the Boost.Python python
+      bindings.</p>
+
+      <p>Fusion is licensed under the MIT license, and available for download
+      from <a href=
+      "http://itamarst.org/software">http://itamarst.org/software</a>.</p>
+    </dd>
+  </dl>
+
+  <h3>Tools</h3>
+
+  <dl>
+    <dt><a href="http://www.jayacard.org"><b>Jayacard</b></a></dt>
+
+    <dd>
+      Jayacard aims at developing a secure portable open source operating
+      system for contactless smart cards and a complete suite of high quality
+      development tools to ease smart card OS and application development.
+
+      <p>The core of the smart card reader management is written in C++ but
+      all the development tools are written in the friendly Python language.
+      Boost plays the fundamental role of binding the tools to our core smart
+      card reader library.</p>
+    </dd>
+  </dl>
+  <hr>
+
+  <p>Revised
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+   29 May, 2008</p>
+
+  <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+  Abrahams</a> 2002-2008.</i></p>
+</body>
+</html>

doc/special.html

@@ -1,905 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
-    <title>
-      Special Method and Operator Support
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="middle" src= 
-        "../../../c++boost.gif" alt="c++boost.gif (8819 bytes)">Special Method and
-        Operator Support
-      </h1>
-      <h2>
-         Overview
-      </h2>
-      <p>
-         BPL supports all of the standard <a href=
-        "http://www.pythonlabs.com/pub/www.python.org/doc/current/ref/specialnames.html">
-        special method names</a> supported by real Python class instances <em>
-        except</em> <code>__complex__</code> (more on the reasons <a href=
-        "#reasons">below</a>). In addition, it can quickly and easily expose
-        suitable C++ functions and operators as Python operators. The following
-        categories of special method names are supported:
-<ul>
-<li><a href="#general">Basic Customization</a>
-<li><a href="#numeric">Numeric Operators</a>
-<li><a href="#sequence_and_mapping">Sequence and Mapping protocols</a>
-<li><a href="#getter_setter">Attribute Getters and Setters</a>
-</ul>
-
-<h2><a name="general">Basic Customization</a></h2>
-
-
-<p>
-      Python provides a number of special operators for basic customization of a
-      class. Only a brief description is provided below; more complete
-      documentation can be found <a
-      href="http://www.pythonlabs.com/pub/www.python.org/doc/current/ref/customization.html">here</a>.
-
-      <dl>
-        <dt>
-          <b><tt class='method'>__init__</tt></b>(<i>self</i>)
-        <dd>
-          Initialize the class instance. For extension classes not subclassed in
-          Python, <code> __init__</code> is defined by 
-          
-          <pre>    my_class.def(boost::python::constructor<...>())</pre> 
-          
-          (see section <a href="example1.html">"A Simple Example Using BPL"</a>).<p>
-        <dt>
-          <b><tt class='method'>__del__</tt></b>(<i>self</i>)
-        <dd>
-          Called when the extension instance is about to be destroyed. For extension classes 
-          not subclassed in Python, <code> __del__</code> is always defined automatically by 
-          means of the class' destructor.
-        <dt>
-          <b><tt class='method'>__repr__</tt></b>(<i>self</i>)
-        <dd>
-          Create a string representation from which the object can be
-          reconstructed.
-        <dt>
-          <b><tt class='method'>__str__</tt></b>(<i>self</i>)
-        <dd>
-          Create a string representation which is suitable for printing.
-        <dt>
-          <b><tt class='method'>__cmp__</tt></b>(<i>self, other</i>)
-        <dd>
-          Three-way compare function, used to implement comparison operators
-          (&lt; etc.) Should return a negative integer if <code> self < other
-          </code> , zero if <code> self == other </code> , a positive integer if
-          <code> self > other </code>.
-        <dt>
-          <b><tt class='method'>__hash__</tt></b>(<i>self</i>)
-        <dd>
-          Called for the key object for dictionary operations, and by the
-          built-in function hash(). Should return a 32-bit integer usable as a
-          hash value for dictionary operations (only allowed if __cmp__ is also
-          defined)
-        <dt>
-          <b><tt class='method'>__nonzero__</tt></b>(<i>self</i>)
-        <dd>
-          called if the object is used as a truth value (e.g. in an if
-          statement)
-        <dt>
-        <b><tt class='method'>__call__</tt></b> (<var>self</var><big>[</big><var>, args...</var><big>]</big>)
-<dd>
-Called when the instance is ``called'' as a function; if this method
-is defined, <code><var>x</var>(arg1, arg2, ...)</code> is a shorthand for
-<code><var>x</var>.__call__(arg1, arg2, ...)</code>.
-      </dl>
-
-      If we have a suitable C++ function that supports any of these features,
-      we can export it like any other function, using its Python special name.
-      For example, suppose that class <code>Foo</code> provides a string
-      conversion function: 
-<blockquote><pre>
-std::string to_string(Foo const&amp; f)
-{
-    std::ostringstream s;
-    s &lt;&lt; f;
-    return s.str();
-}
-</pre></blockquote>
-      This function would be wrapped like this: 
-<blockquote><pre>
-boost::python::class_builder&lt;Foo&gt; foo_class(my_module, "Foo");
-foo_class.def(&amp;to_string, "__str__");
-</pre></blockquote>
-      Note that BPL also supports <em>automatic wrapping</em> of
-      <code>__str__</code> and <code>__cmp__</code>. This is explained in the <a
-      href="#numeric">next section</a> and the <a href="#numeric_table">Table of
-      Automatically Wrapped Methods</a>.
-
-<h2><a name="numeric">Numeric Operators</a></h2>
-
-<p>
-      Numeric operators can be exposed manually, by <code>def</code>ing C++
-      [member] functions that support the standard Python <a
-      href="http://www.pythonlabs.com/pub/www.python.org/doc/current/ref/numeric-types.html">numeric
-      protocols</a>. This is the same basic technique used to expose
-      <code>to_string()</code> as <code>__str__()</code> above, and is <a
-      href="#numeric_manual">covered in detail below</a>.  BPL also supports
-      <i>automatic wrapping</i> of numeric operators whenever they have already
-      been defined in C++.
-
-<h3><a name="numeric_auto">Exposing C++ Operators Automatically</a></h3>
-
-<p>
-Supose we wanted to expose a C++ class
-      <code>BigNum</code> which supports addition. That is, in C++ we can write:
-<blockquote><pre>
-BigNum a, b, c;
-...
-c = a + b;
-</pre></blockquote>
-<p>
-      To enable the same functionality in Python, we first wrap the <code>
-      BigNum</code> class as usual: 
-<blockquote><pre>
-boost::python::class_builder&lt;BigNum&gt; bignum_class(my_module, "BigNum");
-bignum_class.def(boost::python::constructor&lt;&gt;());
-...
-</pre></blockquote>
-      Then we export the addition operator like this: 
-
-<blockquote><pre>
-bignum_class.def(boost::python::operators&lt;boost::python::op_add&gt;());
-</pre></blockquote>
-
-      Since BigNum also supports subtraction, multiplication, and division, we
-      want to export those also. This can be done in a single command by
-      ``or''ing the operator identifiers together (a complete list of these
-      identifiers and the corresponding operators can be found in the <a href= 
-      "#numeric_table">Table of Automatically Wrapped Methods</a>):
-<blockquote><pre>
-bignum_class.def(boost::python::operators&lt;(boost::python::op_sub | boost::python::op_mul | boost::python::op_div)&gt;());
-</pre></blockquote>
-      [Note that the or-expression must be enclosed in parentheses.]
-
-<p>This form of operator definition can be used to wrap unary and
-      homogeneous binary operators (a <i>homogeneous</i> operator has left and
-      right operands of the same type). Now suppose that our C++ library also
-      supports addition of BigNums and plain integers:
-
-<blockquote><pre>
-BigNum a, b;
-int i;
-...
-a = b + i;
-a = i + b;
-</pre></blockquote>
-      To wrap these heterogeneous operators, we need to specify a different type for
-      one of the operands. This is done using the <code>right_operand</code>
-      and <code>left_operand</code> templates: 
-<blockquote><pre>
-bignum_class.def(boost::python::operators&lt;boost::python::op_add&gt;(), boost::python::right_operand&lt;int&gt;());
-bignum_class.def(boost::python::operators&lt;boost::python::op_add&gt;(), boost::python::left_operand&lt;int&gt;());
-</pre></blockquote>
-      BPL uses overloading to register several variants of the same
-      operation (more on this in the context of <a href="#coercion">
-      coercion</a>). Again, several operators can be exported at once: 
-<blockquote><pre>
-bignum_class.def(boost::python::operators&lt;(boost::python::op_sub | boost::python::op_mul | boost::python::op_div)&gt;(),
-                 boost::python::right_operand&lt;int&gt;());
-bignum_class.def(boost::python::operators&lt;(boost::python::op_sub | boost::python::op_mul | boost::python::op_div)&gt;(), 
-                 boost::python::left_operand&lt;int&gt;());
-</pre></blockquote>
-      The type of the operand not mentioned is taken from the class being wrapped. In
-      our example, the class object is <code>bignum_class</code>, and thus the
-      other operand's type is ``<code>BigNum const&amp;</code>''. You can override
-      this default by explicitly specifying a type in the <code>
-      operators</code> template: 
-<blockquote><pre>
-bignum_class.def(boost::python::operators&lt;boost::python::op_add, BigNum&gt;(), boost::python::right_operand&lt;int&gt;());
-</pre></blockquote>
-      <p>
-        Note that automatic wrapping uses the <em>expression</em>
-        ``<code>left + right</code>'' and can be used uniformly
-        regardless of whether the C++ operators are supplied as free functions
-
- <blockquote><pre>
-BigNum operator+(BigNum, BigNum)
-</pre></blockquote>
-
-        or as member functions
-
-<blockquote><pre>
-BigNum::operator+(BigNum).
-</pre></blockquote>
-
-      <p>
-        For the Python built-in functions <code>pow()</code> and
-        <code>abs()</code>, there is no corresponding C++ operator. Instead,
-        automatic wrapping attempts to wrap C++ functions of the same name. This
-        only works if those functions are known in namespace
-        <code>python</code>.  On some compilers (e.g. MSVC) it might be
-        necessary to add a using declaration prior to wrapping:
-
-<blockquote><pre>
-namespace boost { namespace python { 
-  using my_namespace::pow;
-  using my_namespace::abs;
-}
-</pre></blockquote>
-
-<h3><a name="numeric_manual">Wrapping Numeric Operators Manually</a></h3>
-      <p>
-        In some cases, automatic wrapping of operators may be impossible or
-        undesirable. Suppose, for example, that the modulo operation for BigNums
-        is defined by a set of functions called <code>mod()</code>:
-
-<blockquote><pre>
-BigNum mod(BigNum const&amp; left, BigNum const&amp; right);
-BigNum mod(BigNum const&amp; left, int right);
-BigNum mod(int left, BigNum const&amp; right);
-</pre></blockquote>
-
-     <p>
-        For automatic wrapping of the modulo function, <code>operator%()</code> would be needed.
-        Therefore, the <code>mod()</code>-functions must be wrapped manually. That is, we have 
-        to export them explicitly with the Python special name "__mod__":
-
-<blockquote><pre>
-bignum_class.def((BigNum (*)(BigNum const&amp;, BigNum const&amp;))&amp;mod, "__mod__");
-bignum_class.def((BigNum (*)(BigNum const&amp;, int))&amp;mod, "__mod__");
-</pre></blockquote>
-
-<p>
-      The third form of <code>mod()</code> (with <code>int</code> as left operand) cannot 
-      be wrapped directly. We must first create a function <code>rmod()</code> with the
-      operands reversed: 
-
-<blockquote><pre>
-BigNum rmod(BigNum const&amp; right, int left)
-{
-    return mod(left, right);
-}
-</pre></blockquote>
-
-      This function must be wrapped under the name "__rmod__" (standing for "reverse mod"): 
-
-<blockquote><pre>
-bignum_class.def(&amp;rmod,  "__rmod__");
-</pre></blockquote>
-
-      Many of the possible operator names can be found in the <a href=
-      "#numeric_table">Table of Automatically Wrapped Methods</a>. Special treatment is
-      necessary to export the <a href="#ternary_pow">ternary pow</a> operator.
-
-      <p>
-        Automatic and manual wrapping can be mixed arbitrarily. Note that you
-        cannot overload the same operator for a given extension class on both
-        ``<code>int</code>'' and ``<code>float</code>'', because Python implicitly
-        converts these types into each other. Thus, the overloaded variant
-        found first (be it ``<code>int</code>`` or ``<code>float</code>'') will be
-        used for either of the two types.
-
-<h3><a name="coercion">Coercion</a></h3>
-
-
-      Plain Python can only execute operators with identical types on the left
-      and right hand side. If it encounters an expression where the types of
-      the left and right operand differ, it tries to coerce these types to a
-      common type before invoking the actual operator. Implementing good
-      coercion functions can be difficult if many type combinations must be
-      supported. 
-      <p>
-        BPL solves this problem the same way that C++ does: with <em><a
-        href="overloading.html">overloading</a></em>. This technique drastically
-        simplifies the code neccessary to support operators: you just register
-        operators for all desired type combinations, and BPL automatically
-        ensures that the correct function is called in each case; there is no
-        need for user-defined coercion functions. To enable operator
-        overloading, BPL provides a standard coercion which is <em>implicitly
-        registered</em> whenever automatic operator wrapping is used.
-      <p>
-        If you wrap all operator functions manually, but still want to use
-        operator overloading, you have to register the standard coercion
-        function explicitly:
-
-<blockquote><pre>
-// this is not necessary if automatic operator wrapping is used
-bignum_class.def_standard_coerce();
-</pre></blockquote>
-
-      If you encounter a situation where you absolutely need a customized
-      coercion, you can still define the "__coerce__" operator manually. The signature
-      of a coercion function should look like one of the following (the first is
-      the safest):
-
-<blockquote><pre>
-boost::python::tuple custom_coerce(boost::python::reference left, boost::python::reference right);
-boost::python::tuple custom_coerce(PyObject* left, PyObject* right);
-PyObject* custom_coerce(PyObject* left, PyObject* right);
-</pre></blockquote>
-
-      The resulting <code>tuple</code> must contain two elements which
-      represent the values of <code>left</code> and <code>right</code>
-      converted to the same type. Such a function is wrapped as usual: 
-
-<blockquote><pre>
-// this must be called before any use of automatic operator  
-// wrapping or a call to some_class.def_standard_coerce()
-some_class.def(&amp;custom_coerce, "__coerce__");
-</pre></blockquote>
-
-     Note that the standard coercion (defined by use of automatic 
-     operator wrapping on a <code>class_builder</code> or a call to
-     <code>class_builder::def_standard_coerce()</code>) will never be applied if
-     a custom coercion function has been registered. Therefore, in 
-     your coercion function you should call 
-
-<blockquote><pre>
-boost::python::standard_coerce(left, right);
-</pre></blockquote>
-
-     for all cases that you don't want to handle yourself.
-
-<h3><a name="ternary_pow">The Ternary <code>pow()</code> Operator</a></h3>
-
-    <p>
-      In addition to the usual binary <code>pow(x, y)</code> operator (meaning
-      <i>x<sup>y</sup></i>), Python also provides a ternary variant that implements
-      <i>x<sup>y</sup> <b>mod</b> z</i>, presumably using a more efficient algorithm than
-      concatenation of power and modulo operators. Automatic operator wrapping
-      can only be used with the binary variant. Ternary <code>pow()</code> must
-      always be wrapped manually. For a homgeneous ternary <code>pow()</code>,
-      this is done as usual: 
-
-<blockquote><pre>
-BigNum power(BigNum const&amp; first, BigNum const&amp; second, BigNum const&amp; modulus);
-typedef BigNum (ternary_function1)(const BigNum&amp;, const BigNum&amp;, const BigNum&amp;);
-...
-bignum_class.def((ternary_function1)&amp;power,  "__pow__");
-</pre></blockquote>
-
-      If you want to support this function with non-uniform argument
-      types, wrapping is a little more involved. Suppose you have to wrap: 
-
-<blockquote><pre>
-BigNum power(BigNum const&amp; first, int second, int modulus);
-BigNum power(int first, BigNum const&amp; second, int modulus);
-BigNum power(int first, int second, BigNum const&amp; modulus);
-</pre></blockquote>
-
-      The first variant can be wrapped as usual: 
-
-<blockquote><pre>
-typedef BigNum (ternary_function2)(const BigNum&amp;, int, int);
-bignum_class.def((ternary_function2)&amp;power,  "__pow__");
-</pre></blockquote>
-
-      In the second variant, however, <code>BigNum</code> appears only as second
-      argument, and in the last one it's the third argument. These functions
-      must be presented to BPL such that that the <code>BigNum</code>
-      argument appears in first position:
-
-<blockquote><pre>
-BigNum rpower(BigNum const&amp; second, int first, int modulus)
-{
-    return power(first, second, modulus);
-}
-
-BigNum rrpower(BigNum const&amp; modulus, int first, int second)
-{
-    return power(first, second, modulus);
-}
-</pre></blockquote>
-
-<p>These functions must be wrapped under the names "__rpow__" and "__rrpow__"
- respectively:
-
-<blockquote><pre>
-bignum_class.def((ternary_function2)&amp;rpower,  "__rpow__");
-bignum_class.def((ternary_function2)&amp;rrpower,  "__rrpow__");
-</pre></blockquote>
-
-Note that "__rrpow__" is an extension not present in plain Python. 
-
-<h2><a name="numeric_table">Table of Automatically Wrapped Methods</a></h2>
-      <p>
-         BPL can automatically wrap the following <a href=
-         "http://www.pythonlabs.com/pub/www.python.org/doc/current/ref/specialnames.html">
-         special methods</a>:
-
-      <p>
-      <table summary="special numeric methods" cellpadding="5" border="1"
-      width="100%">
-        <tr>
-          <td align="center">
-            <b>Python Operator Name</b>
-          <td align="center">
-            <b>Python Expression</b>
-          <td align="center">
-            <b>C++ Operator Id</b>
-          <td align="center">
-            <b>C++ Expression Used For Automatic Wrapping</b><br>
-             with <code>cpp_left = from_python(left,
-            type&lt;Left&gt;())</code>,<br>
-             <code>cpp_right = from_python(right,
-            type&lt;Right&gt;())</code>,<br>
-             and <code>cpp_oper = from_python(oper, type&lt;Oper&gt;())</code>
-        <tr>
-          <td>
-            <code>__add__, __radd__</code>
-          <td>
-            <code>left + right</code>
-          <td>
-            <code>op_add</code>
-          <td>
-            <code>cpp_left + cpp_right</code>
-        <tr>
-          <td>
-            <code>__sub__, __rsub__</code>
-          <td>
-            <code>left - right</code>
-          <td>
-            <code>op_sub</code>
-          <td>
-            <code>cpp_left - cpp_right</code>
-        <tr>
-          <td>
-            <code>__mul__, __rmul__</code>
-          <td>
-            <code>left * right</code>
-          <td>
-            <code>op_mul</code>
-          <td>
-            <code>cpp_left * cpp_right</code>
-        <tr>
-          <td>
-            <code>__div__, __rdiv__</code>
-          <td>
-            <code>left / right</code>
-          <td>
-            <code>op_div</code>
-          <td>
-            <code>cpp_left / cpp_right</code>
-        <tr>
-          <td>
-            <code>__mod__, __rmod__</code>
-          <td>
-            <code>left % right</code>
-          <td>
-            <code>op_mod</code>
-          <td>
-            <code>cpp_left % cpp_right</code>
-        <tr>
-          <td>
-            <code>__divmod__, __rdivmod__</code>
-          <td>
-            <code>(quotient, remainder)<br>
-            = divmod(left, right)</code>
-          <td>
-            <code>op_divmod</code>
-          <td>
-            <code>cpp_left / cpp_right</code>
-        <br><code>cpp_left % cpp_right</code>
-        <tr>
-          <td>
-            <code>__pow__, __rpow__</code>
-          <td>
-            <code>pow(left, right)</code><br>
-             (binary power)
-          <td>
-            <code>op_pow</code>
-          <td>
-            <code>pow(cpp_left, cpp_right)</code>
-        <tr>
-          <td>
-            <code>__rrpow__</code>
-          <td>
-            <code>pow(left, right, modulo)</code><br>
-             (ternary power modulo)
-          <td colspan="2">
-            no automatic wrapping, <a href="#ternary_pow">special treatment</a>
-            required
-        <tr>
-          <td>
-            <code>__lshift__, __rlshift__</code>
-          <td>
-            <code>left &lt;&lt; right</code>
-          <td>
-            <code>op_lshift</code>
-          <td>
-            <code>cpp_left &lt;&lt; cpp_right</code>
-        <tr>
-          <td>
-            <code>__rshift__, __rrshift__</code>
-          <td>
-            <code>left &gt;&gt; right</code>
-          <td>
-            <code>op_rshift</code>
-          <td>
-            <code>cpp_left &gt;&gt; cpp_right</code>
-        <tr>
-          <td>
-            <code>__and__, __rand__</code>
-          <td>
-            <code>left &amp; right</code>
-          <td>
-            <code>op_and</code>
-          <td>
-            <code>cpp_left &amp; cpp_right</code>
-        <tr>
-          <td>
-            <code>__xor__, __rxor__</code>
-          <td>
-            <code>left ^ right</code>
-          <td>
-            <code>op_xor</code>
-          <td>
-            <code>cpp_left ^ cpp_right</code>
-        <tr>
-          <td>
-            <code>__or__, __ror__</code>
-          <td>
-            <code>left | right</code>
-          <td>
-            <code>op_or</code>
-          <td>
-            <code>cpp_left | cpp_right</code>
-
-        <tr>
-          <td>
-            <code>__cmp__, __rcmp__</code>
-          <td>
-            <code>cmp(left, right)</code><br>
-             <code>left &lt; right</code><br>
-             <code>left &lt;= right</code><br>
-             <code>left &gt; right</code><br>
-             <code>left &gt;= right</code><br>
-             <code>left == right</code><br>
-             <code>left != right</code>
-          <td>
-            <code>op_cmp</code>
-          <td>
-            <code>cpp_left &lt; cpp_right </code>
-        <br><code>cpp_right &lt; cpp_left</code>
-
-        <tr>
-          <td>
-            <code>__neg__</code>
-          <td>
-            <code>-oper </code> (unary negation)
-          <td>
-            <code>op_neg</code>
-          <td>
-            <code>-cpp_oper</code>
-        <tr>
-          <td>
-            <code>__pos__</code>
-          <td>
-            <code>+oper </code> (identity)
-          <td>
-            <code>op_pos</code>
-          <td>
-            <code>+cpp_oper</code>
-        <tr>
-          <td>
-            <code>__abs__</code>
-          <td>
-            <code>abs(oper) </code> (absolute value)
-          <td>
-            <code>op_abs</code>
-          <td>
-            <code>abs(cpp_oper)</code>
-        <tr>
-          <td>
-            <code>__invert__</code>
-          <td>
-            <code>~oper </code> (bitwise inversion)
-          <td>
-            <code>op_invert</code>
-          <td>
-            <code>~cpp_oper</code>
-        <tr>
-          <td>
-            <code>__int__</code>
-          <td>
-            <code>int(oper) </code> (integer conversion)
-          <td>
-            <code>op_int</code>
-          <td>
-            <code>long(cpp_oper)</code>
-        <tr>
-          <td>
-            <code>__long__</code>
-          <td>
-            <code>long(oper) </code><br>
-             (infinite precision integer conversion)
-          <td>
-            <code>op_long</code>
-          <td>
-            <code>PyLong_FromLong(cpp_oper)</code>
-        <tr>
-          <td>
-            <code>__float__</code>
-          <td>
-            <code>float(oper) </code> (float conversion)
-          <td>
-            <code>op_float</code>
-          <td>
-            <code>double(cpp_oper)</code>
-        <tr>
-          <td>
-            <code>__str__</code>
-          <td>
-            <code>str(oper) </code> (string conversion)
-          <td>
-            <code>op_str</code>
-          <td>
-            <code>std::ostringstream s; s &lt;&lt; oper;</code>
-        <tr>
-          <td>
-            <code>__coerce__</code>
-          <td>
-            <code>coerce(left, right)</code>
-          <td colspan="2">
-            usually defined automatically, otherwise <a href="#coercion">
-            special treatment</a> required
-      </table>
-
-<h2><a name="sequence_and_mapping">Sequence and Mapping Operators</a></h2>
-
-<p>
-      Sequence and mapping operators let wrapped objects behave in accordance
-      to Python's iteration and access protocols. These protocols differ
-      considerably from the ones found in C++. For example, Python's typical
-      iteration idiom looks like
-
-<blockquote><pre>
-for i in S:
-</pre></blockquote>
-
-      while in C++ one writes
-
-<blockquote><pre>
-for (iterator i = S.begin(), end = S.end(); i != end; ++i)
-</pre></blockquote>
-
-<p>One could try to wrap C++ iterators in order to carry the C++ idiom into
-      Python. However, this does not work very well because 
-
-<ol>
-<li>It leads to
-      non-uniform Python code (wrapped sequences support a usage different from 
-      Python built-in sequences) and 
-
-<li>Iterators (e.g. <code>std::vector::iterator</code>) are often implemented as plain C++
-      pointers which are <a href="pointers.html#problem">problematic</a> for any automatic
-      wrapping system.
-</ol>
-
-      <p>
-        It is a better idea to support the standard <a
-        href="http://www.pythonlabs.com/pub/www.python.org/doc/current/ref/sequence-types.html">Python
-        sequence and mapping protocols</a> for your wrapped containers. These
-        operators have to be wrapped manually because there are no corresponding
-        C++ operators that could be used for automatic wrapping. The Python
-        documentation lists the relevant <a href=
-        "http://www.pythonlabs.com/pub/www.python.org/doc/current/ref/sequence-types.html">
-        container operators</a>. In particular, expose __getitem__, __setitem__
-        and remember to raise the appropriate Python exceptions
-        (<code>PyExc_IndexError</code> for sequences,
-        <code>PyExc_KeyError</code> for mappings) when the requested item is not
-        present.
-
-      <p>
-        In the following example, we expose <code>std::map&lt;std::size_t,std::string&gt;</code>:
-      <blockquote>
-<pre>
-typedef std::map&lt;std::size_t, std::string&gt; StringMap;
-
-// A helper function for dealing with errors. Throw a Python exception
-// if p == m.end().
-void throw_key_error_if_end(
-        const StringMap&amp; m, 
-        StringMap::const_iterator p, 
-        std::size_t key)
-{
-    if (p == m.end())
-    {
-        PyErr_SetObject(PyExc_KeyError, boost::python::converters::to_python(key));
-        throw boost::python::error_already_set();
-    }
-}
-
-// Define some simple wrapper functions which match the Python  protocol
-// for __getitem__, __setitem__, and __delitem__.  Just as in Python, a
-// free function with a ``self'' first parameter makes a fine class method.
-
-const std::string&amp; get_item(const StringMap&amp; self, std::size_t key)
-{
-    const StringMap::const_iterator p = self.find(key);
-    throw_key_error_if_end(self, p, key);
-    return p-&gt;second;
-}
-
-// Sets the item corresponding to key in the map.
-void StringMapPythonClass::set_item(StringMap&amp; self, std::size_t key, const std::string&amp; value)
-{
-    self[key] = value;
-}
-
-// Deletes the item corresponding to key from the map.
-void StringMapPythonClass::del_item(StringMap&amp; self, std::size_t key)
-{
-    const StringMap::iterator p = self.find(key);
-    throw_key_error_if_end(self, p, key);
-    self.erase(p);
-}
-
-class_builder&lt;StringMap&gt; string_map(my_module, "StringMap");
-string_map.def(boost::python::constructor&lt;&gt;());
-string_map.def(&amp;StringMap::size, "__len__");
-string_map.def(get_item, "__getitem__");
-string_map.def(set_item, "__setitem__");
-string_map.def(del_item, "__delitem__");
-</pre>
-      </blockquote>
-      <p>
-         Then in Python:
-      <blockquote>
-<pre>
-&gt;&gt;&gt; m = StringMap()
-&gt;&gt;&gt; m[1]
-Traceback (innermost last):
-  File "&lt;stdin&gt;", line 1, in ?
-KeyError: 1
-&gt;&gt;&gt; m[1] = 'hello'
-&gt;&gt;&gt; m[1]
-'hello'
-&gt;&gt;&gt; del m[1]
-&gt;&gt;&gt; m[1]            # prove that it's gone
-Traceback (innermost last):
-  File "&lt;stdin&gt;", line 1, in ?
-KeyError: 1
-&gt;&gt;&gt; del m[2]
-Traceback (innermost last):
-  File "&lt;stdin&gt;", line 1, in ?
-KeyError: 2
-&gt;&gt;&gt; len(m)
-0
-&gt;&gt;&gt; m[0] = 'zero'
-&gt;&gt;&gt; m[1] = 'one'
-&gt;&gt;&gt; m[2] = 'two'
-&gt;&gt;&gt; m[3] = 'three'
-&gt;&gt;&gt; len(m)
-4
-</pre>
-      </blockquote>
-
-<h2><a name="getter_setter">Customized Attribute Access</a></h2>
-
-      <p>
-        Just like built-in Python classes, BPL extension classes support <a
-        href="http://www.pythonlabs.com/pub/www.python.org/doc/current/ref/attribute-access.html">special
-        the usual attribute access methods</a> <code>__getattr__</code>,
-        <code>__setattr__</code>, and <code>__delattr__</code>.
-        Because writing these functions can
-        be tedious in the common case where the attributes being accessed are
-        known statically, BPL checks the special names
-
-      <ul>
-        <li>
-          <code>__getattr__<em>&lt;name&gt;</em>__</code>
-        <li>
-          <code>__setattr__<em>&lt;name&gt;</em>__</code>
-        <li>
-          <code>__delattr__<em>&lt;name&gt;</em>__</code>
-      </ul>
-
-      to provide functional access to the attribute <em>&lt;name&gt;</em>. This
-      facility can be used from C++ or entirely from Python. For example, the
-      following shows how we can implement a ``computed attribute'' in Python: 
-      <blockquote>
-<pre>
-&gt;&gt;&gt; class Range(AnyBPLExtensionClass):
-...    def __init__(self, start, end):
-...        self.start = start
-...        self.end = end
-...    def __getattr__length__(self):
-...        return self.end - self.start
-...
-&gt;&gt;&gt; x = Range(3, 9)
-&gt;&gt;&gt; x.length
-6
-</pre>
-      </blockquote>
-      <h4>
-         Direct Access to Data Members
-      </h4>
-      <p>
-         BPL uses the special <code>
-        __xxxattr__<em>&lt;name&gt;</em>__</code> functionality described above
-        to allow direct access to data members through the following special
-        functions on <code>class_builder&lt;&gt;</code> and <code>
-        extension_class&lt;&gt;</code>:
-      <ul>
-        <li>
-          <code>def_getter(<em>pointer-to-member</em>, <em>name</em>)</code> //
-          read access to the member via attribute <em>name</em>
-        <li>
-          <code>def_setter(<em>pointer-to-member</em>, <em>name</em>)</code> //
-          write access to the member via attribute <em>name</em>
-        <li>
-          <code>def_readonly(<em>pointer-to-member</em>, <em>name</em>)</code>
-          // read-only access to the member via attribute <em>name</em>
-        <li>
-          <code>def_read_write(<em>pointer-to-member</em>, <em>
-          name</em>)</code> // read/write access to the member via attribute
-          <em>name</em>
-      </ul>
-      <p>
-         Note that the first two functions, used alone, may produce surprising
-        behavior. For example, when <code>def_getter()</code> is used, the
-        default functionality for <code>setattr()</code> and <code>
-        delattr()</code> remains in effect, operating on items in the extension
-        instance's name-space (i.e., its <code>__dict__</code>). For that
-        reason, you'll usually want to stick with <code>def_readonly</code> and
-        <code>def_read_write</code>.
-      <p>
-         For example, to expose a <code>std::pair&lt;int,long&gt;</code> we
-        might write:
-      <blockquote>
-<pre>
-typedef std::pair&lt;int,long&gt; Pil;
-int first(const Pil&amp; x) { return x.first; }
-long second(const Pil&amp; x) { return x.second; }
-   ...
-my_module.def(first, "first");
-my_module.def(second, "second");
-
-class_builder&lt;Pil&gt; pair_int_long(my_module, "Pair");
-pair_int_long.def(boost::python::constructor&lt;&gt;());
-pair_int_long.def(boost::python::constructor&lt;int,long&gt;());
-pair_int_long.def_read_write(&amp;Pil::first, "first");
-pair_int_long.def_read_write(&amp;Pil::second, "second");
-</pre>
-      </blockquote>
-      <p>
-         Now your Python class has attributes <code>first</code> and <code>
-        second</code> which, when accessed, actually modify or reflect the
-        values of corresponding data members of the underlying C++ object. Now
-        in Python:
-      <blockquote>
-<pre>
-&gt;&gt;&gt; x = Pair(3,5)
-&gt;&gt;&gt; x.first
-3
-&gt;&gt;&gt; x.second
-5
-&gt;&gt;&gt; x.second = 8
-&gt;&gt;&gt; x.second
-8
-&gt;&gt;&gt; second(x) # Prove that we're not just changing the instance __dict__
-8
-</pre>
-      </blockquote>
-      <h2>
-        <a name="reasons">And what about <code>__complex__</code>?</a>
-      </h2>
-      <p>
-        That, dear reader, is one problem we don't know how to solve. The
-        Python source contains the following fragment, indicating the
-        special-case code really is hardwired:
-      <blockquote>
-<pre>
-/* XXX Hack to support classes with __complex__ method */
-if (PyInstance_Check(r)) { ...
-</pre>
-      </blockquote>
-      <p>
-Next: <a href="under-the-hood.html">A Peek Under the Hood</a>
-Previous: <a href="inheritance.html">Inheritance</a> 
-Up: <a href= "index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams and Ullrich K&ouml;the 2000.
-        Permission to copy, use, modify, sell and distribute this document is
-        granted provided this copyright notice appears in all copies. This
-        document is provided ``as is'' without express or implied
-        warranty, and with no claim as to its suitability for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/support.html

@@ -0,0 +1,74 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Cygwin (vers 1st April 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="boost.css">
+
+    <title>Boost.Python - Support Resources</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Support Resources</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Synopsis</h2>
+
+    <p>This is a list of available resources for support with Boost.Python
+    problems and feature requests. <b>Please try to resist emailing the
+    Boost.Python developers directly for support.</b> Use the following
+    resources instead; the developers are listening!</p>
+    <hr>
+
+    <dl class="page-index">
+      <dt><b><a href="http://www.boost-consulting.com">Boost
+      Consulting</a></b> - Commercial support, development, training, and
+      distribution for all the Boost libraries, from the people who brought
+      you Boost.Python.<br>
+       &nbsp;</dt>
+
+      <dt><b><a href=
+      "http://www.boost.org/more/mailing_lists.htm#cplussig">The Python
+      C++-sig</a></b> mailing list is a forum for discussing Python/C++
+      interoperability, and Boost.Python in particular. Post your
+      Boost.Python questions here.<br>
+       &nbsp;</dt>
+
+      <dt>The <b>Boost.Python <a href=
+      "http://www.python.org/cgi-bin/moinmoin/boost_2epython">Wiki
+      Pages</a></b> established by Mike Rovner as part of the <a href=
+      "http://www.python.org/cgi-bin/moinmoin">PythonInfo Wiki</a> serves as
+      a forum to gather peoples' experience and as a cookbook.<br>
+       &nbsp;</dt>
+    </dl>
+    <hr>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     12 Sept, 2003 <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+    Abrahams</a> 2003.</i></p>
+  </body>
+</html>
+

doc/template.html

@@ -1,26 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"
-"http://www.w3.org/TR/REC-html40/strict.dtd">
-    <title>
-      The Title Of This Page
-    </title>
-    <div>
-      <h1>
-         <img width="277" height="86" id="_x0000_i1025" align="center"
-        src="../../../c++boost.gif" alt= "c++boost.gif (8819 bytes)">The Title Of This
-        Page
-      </h1>
-      <p>
-      <p>
-         Prev: <a href="prev.html">Previous</a>
-         Next: <a href="next.html">Next</a>
-         Up: <a href="index.html">Top</a>
-      <p>
-         &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-        sell and distribute this document is granted provided this copyright
-        notice appears in all copies. This document is provided "as is" without
-        express or implied warranty, and with no claim as to its suitability
-        for any purpose.
-      <p>
-         Updated: Nov 26, 2000
-    </div>
-

doc/tutorial/doc/Jamfile.v2

@@ -0,0 +1,16 @@
+# Copyright Joel de Guzman 2006. Distributed under the Boost
+# Software License, Version 1.0. (See accompanying
+# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+project boost/libs/python/doc/tutorial/doc ;
+
+import boostbook : boostbook ;
+using quickbook ;
+
+boostbook tutorial
+    :
+        tutorial.qbk
+    :
+        <xsl:param>boost.root=../../../../../..
+        <xsl:param>boost.libraries=../../../../../../libs/libraries.htm
+        <xsl:param>html.stylesheet=../../../../../../doc/html/boostbook.css
+    ;

doc/tutorial/doc/html/index.html

@@ -0,0 +1,154 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>Chapter 1. python 1.0</title>
+<link rel="stylesheet" href="../../../../../../doc/html/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
+<link rel="start" href="index.html" title="Chapter 1. python 1.0">
+<link rel="next" href="python/hello.html" title=" Building Hello World">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../index.htm">Home</a></td>
+<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="../../../../../../people/people.htm">People</a></td>
+<td align="center"><a href="../../../../../../more/faq.htm">FAQ</a></td>
+<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav"><a accesskey="n" href="python/hello.html"><img src="../../../../../../doc/html/images/next.png" alt="Next"></a></div>
+<div class="chapter" lang="en">
+<div class="titlepage"><div>
+<div><h2 class="title">
+<a name="python"></a>Chapter 1. python 1.0</h2></div>
+<div><div class="author"><h3 class="author">
+<span class="firstname">Joel</span> <span class="surname">de Guzman</span>
+</h3></div></div>
+<div><div class="author"><h3 class="author">
+<span class="firstname">David</span> <span class="surname">Abrahams</span>
+</h3></div></div>
+<div><p class="copyright">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams</p></div>
+<div><div class="legalnotice">
+<a name="id455921"></a><p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></div>
+</div></div>
+<div class="toc">
+<p><b>Table of Contents</b></p>
+<dl>
+<dt><span class="section"><a href="index.html#python.quickstart">QuickStart</a></span></dt>
+<dt><span class="section"><a href="python/hello.html"> Building Hello World</a></span></dt>
+<dt><span class="section"><a href="python/exposing.html"> Exposing Classes</a></span></dt>
+<dd><dl>
+<dt><span class="section"><a href="python/exposing.html#python.constructors">Constructors</a></span></dt>
+<dt><span class="section"><a href="python/exposing.html#python.class_data_members">Class Data Members</a></span></dt>
+<dt><span class="section"><a href="python/exposing.html#python.class_properties">Class Properties</a></span></dt>
+<dt><span class="section"><a href="python/exposing.html#python.inheritance">Inheritance</a></span></dt>
+<dt><span class="section"><a href="python/exposing.html#python.class_virtual_functions">Class Virtual Functions</a></span></dt>
+<dt><span class="section"><a href="python/exposing.html#python.virtual_functions_with_default_implementations">Virtual Functions with Default Implementations</a></span></dt>
+<dt><span class="section"><a href="python/exposing.html#python.class_operators_special_functions">Class Operators/Special Functions</a></span></dt>
+</dl></dd>
+<dt><span class="section"><a href="python/functions.html">Functions</a></span></dt>
+<dd><dl>
+<dt><span class="section"><a href="python/functions.html#python.call_policies">Call Policies</a></span></dt>
+<dt><span class="section"><a href="python/functions.html#python.overloading">Overloading</a></span></dt>
+<dt><span class="section"><a href="python/functions.html#python.default_arguments">Default Arguments</a></span></dt>
+<dt><span class="section"><a href="python/functions.html#python.auto_overloading">Auto-Overloading</a></span></dt>
+</dl></dd>
+<dt><span class="section"><a href="python/object.html"> Object Interface</a></span></dt>
+<dd><dl>
+<dt><span class="section"><a href="python/object.html#python.basic_interface">Basic Interface</a></span></dt>
+<dt><span class="section"><a href="python/object.html#python.derived_object_types">Derived Object types</a></span></dt>
+<dt><span class="section"><a href="python/object.html#python.extracting_c___objects">Extracting C++ objects</a></span></dt>
+<dt><span class="section"><a href="python/object.html#python.enums">Enums</a></span></dt>
+</dl></dd>
+<dt><span class="section"><a href="python/embedding.html">Embedding</a></span></dt>
+<dd><dl><dt><span class="section"><a href="python/embedding.html#python.using_the_interpreter">Using the interpreter</a></span></dt></dl></dd>
+<dt><span class="section"><a href="python/iterators.html">Iterators</a></span></dt>
+<dt><span class="section"><a href="python/exception.html"> Exception Translation</a></span></dt>
+<dt><span class="section"><a href="python/techniques.html"> General Techniques</a></span></dt>
+<dd><dl>
+<dt><span class="section"><a href="python/techniques.html#python.creating_packages">Creating Packages</a></span></dt>
+<dt><span class="section"><a href="python/techniques.html#python.extending_wrapped_objects_in_python">Extending Wrapped Objects in Python</a></span></dt>
+<dt><span class="section"><a href="python/techniques.html#python.reducing_compiling_time">Reducing Compiling Time</a></span></dt>
+</dl></dd>
+</dl>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.quickstart"></a>QuickStart</h2></div></div></div>
+<p>
+      The Boost Python Library is a framework for interfacing Python and C++. It
+      allows you to quickly and seamlessly expose C++ classes functions and objects
+      to Python, and vice-versa, using no special tools -- just your C++ compiler.
+      It is designed to wrap C++ interfaces non-intrusively, so that you should not
+      have to change the C++ code at all in order to wrap it, making Boost.Python
+      ideal for exposing 3rd-party libraries to Python. The library's use of advanced
+      metaprogramming techniques simplifies its syntax for users, so that wrapping
+      code takes on the look of a kind of declarative interface definition language
+      (IDL).
+    </p>
+<a name="quickstart.hello_world"></a><h2>
+<a name="id385276"></a>
+      Hello World
+    </h2>
+<p>
+      Following C/C++ tradition, let's start with the "hello, world". A
+      C++ Function:
+    </p>
+<pre class="programlisting">
+<span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">greet</span><span class="special">()</span>
+<span class="special">{</span>
+   <span class="keyword">return</span> <span class="string">"hello, world"</span><span class="special">;</span>
+<span class="special">}</span>
+</pre>
+<p>
+      can be exposed to Python by writing a Boost.Python wrapper:
+    </p>
+<pre class="programlisting">
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">hello_ext</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">;</span>
+    <span class="identifier">def</span><span class="special">(</span><span class="string">"greet"</span><span class="special">,</span> <span class="identifier">greet</span><span class="special">);</span>
+<span class="special">}</span>
+</pre>
+<p>
+      That's it. We're done. We can now build this as a shared library. The resulting
+      DLL is now visible to Python. Here's a sample Python session:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">import</span> <span class="identifier">hello_ext</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">print</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">greet</span><span class="special">()</span>
+<span class="identifier">hello</span><span class="special">,</span> <span class="identifier">world</span>
+</pre>
+<p>
+    </p>
+<div class="blockquote"><blockquote class="blockquote">
+<p>
+        </p>
+<p>
+          <span class="emphasis"><em><span class="bold"><b>Next stop... Building your Hello World
+          module from start to finish...</b></span></em></span>
+        </p>
+<p>
+      </p>
+</blockquote></div>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"><p><small>Last revised: March 24, 2008 at 23:09:39 GMT</small></p></td>
+<td align="right"><div class="copyright-footer"></div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav"><a accesskey="n" href="python/hello.html"><img src="../../../../../../doc/html/images/next.png" alt="Next"></a></div>
+</body>
+</html>

doc/tutorial/doc/html/python/embedding.html

@@ -0,0 +1,284 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>Embedding</title>
+<link rel="stylesheet" href="../../../../../../../doc/html/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
+<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
+<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
+<link rel="prev" href="object.html" title=" Object Interface">
+<link rel="next" href="iterators.html" title="Iterators">
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+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
+<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
+<td align="center"><a href="../../../../../../../more/faq.htm">FAQ</a></td>
+<td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="object.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="iterators.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.embedding"></a>Embedding</h2></div></div></div>
+<div class="toc"><dl><dt><span class="section"><a href="embedding.html#python.using_the_interpreter">Using the interpreter</a></span></dt></dl></div>
+<p>
+      By now you should know how to use Boost.Python to call your C++ code from Python.
+      However, sometimes you may need to do the reverse: call Python code from the
+      C++-side. This requires you to <span class="emphasis"><em>embed</em></span> the Python interpreter
+      into your C++ program.
+    </p>
+<p>
+      Currently, Boost.Python does not directly support everything you'll need when
+      embedding. Therefore you'll need to use the <a href="http://www.python.org/doc/current/api/api.html" target="_top">Python/C
+      API</a> to fill in the gaps. However, Boost.Python already makes embedding
+      a lot easier and, in a future version, it may become unnecessary to touch the
+      Python/C API at all. So stay tuned... <span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span>
+    </p>
+<a name="embedding.building_embedded_programs"></a><h2>
+<a name="id471330"></a>
+      Building embedded programs
+    </h2>
+<p>
+      To be able to embed python into your programs, you have to link to both Boost.Python's
+      as well as Python's own runtime library.
+    </p>
+<p>
+      Boost.Python's library comes in two variants. Both are located in Boost's
+      <tt class="literal">/libs/python/build/bin-stage</tt> subdirectory. On Windows, the
+      variants are called <tt class="literal">boost_python.lib</tt> (for release builds)
+      and <tt class="literal">boost_python_debug.lib</tt> (for debugging). If you can't
+      find the libraries, you probably haven't built Boost.Python yet. See <a href="../../../../building.html" target="_top">Building and Testing</a> on how to do this.
+    </p>
+<p>
+      Python's library can be found in the <tt class="literal">/libs</tt> subdirectory
+      of your Python directory. On Windows it is called pythonXY.lib where X.Y is
+      your major Python version number.
+    </p>
+<p>
+      Additionally, Python's <tt class="literal">/include</tt> subdirectory has to be added
+      to your include path.
+    </p>
+<p>
+      In a Jamfile, all the above boils down to:
+    </p>
+<pre class="programlisting">projectroot c:\projects\embedded_program ; # location of the program
+
+# bring in the rules for python
+SEARCH on python.jam = $(BOOST_BUILD_PATH) ;
+include python.jam ;
+
+exe embedded_program # name of the executable
+  : #sources
+     embedded_program.cpp
+  : # requirements
+     &lt;find-library&gt;boost_python &lt;library-path&gt;c:\boost\libs\python
+  $(PYTHON_PROPERTIES)
+    &lt;library-path&gt;$(PYTHON_LIB_PATH)
+    &lt;find-library&gt;$(PYTHON_EMBEDDED_LIBRARY) ;
+</pre>
+<a name="embedding.getting_started"></a><h2>
+<a name="id471435"></a>
+      Getting started
+    </h2>
+<p>
+      Being able to build is nice, but there is nothing to build yet. Embedding the
+      Python interpreter into one of your C++ programs requires these 4 steps:
+    </p>
+<div class="orderedlist"><ol type="1">
+<li>
+        #include <tt class="literal">&lt;boost/python.hpp&gt;</tt>
+</li>
+<li>
+        Call <a href="http://www.python.org/doc/current/api/initialization.html#l2h-652" target="_top">Py_Initialize</a>()
+        to start the interpreter and create the <tt class="literal"><span class="underline">_main</span>_</tt>
+        module.
+      </li>
+<li>
+        Call other Python C API routines to use the interpreter.
+      </li>
+</ol></div>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top"><p>
+        <span class="bold"><b>Note that at this time you must not call <a href="http://www.python.org/doc/current/api/initialization.html#l2h-656" target="_top">Py_Finalize</a>()
+        to stop the interpreter. This may be fixed in a future version of boost.python.</b></span>
+      </p></td></tr>
+</table></div>
+<p>
+      (Of course, there can be other C++ code between all of these steps.)
+    </p>
+<div class="blockquote"><blockquote class="blockquote">
+<p>
+        </p>
+<p>
+          <span class="emphasis"><em><span class="bold"><b>Now that we can embed the interpreter in
+          our programs, lets see how to put it to use...</b></span></em></span>
+        </p>
+<p>
+      </p>
+</blockquote></div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.using_the_interpreter"></a>Using the interpreter</h3></div></div></div>
+<p>
+        As you probably already know, objects in Python are reference-counted. Naturally,
+        the <tt class="literal">PyObject</tt>s of the Python/C API are also reference-counted.
+        There is a difference however. While the reference-counting is fully automatic
+        in Python, the Python<span class="emphasis"><em>C API requires you to do it [@http:</em></span>/www.python.org/doc/current/api/refcounts.html
+        by hand]. This is messy and especially hard to get right in the presence
+        of C++ exceptions. Fortunately Boost.Python provides the <a href="../../../../v2/handle.html" target="_top">handle</a>
+        and <a href="../../../../v2/object.html" target="_top">object</a> class templates to
+        automate the process.
+      </p>
+<a name="using_the_interpreter.running_python_code"></a><h2>
+<a name="id471598"></a>
+        Running Python code
+      </h2>
+<p>
+        Boost.python provides three related functions to run Python code from C++.
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">eval</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">expression</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">globals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">(),</span> <span class="identifier">object</span> <span class="identifier">locals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">())</span>
+<span class="identifier">object</span> <span class="identifier">exec</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">code</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">globals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">(),</span> <span class="identifier">object</span> <span class="identifier">locals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">())</span>
+<span class="identifier">object</span> <span class="identifier">exec_file</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">filename</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">globals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">(),</span> <span class="identifier">object</span> <span class="identifier">locals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">())</span>
+</pre>
+<p>
+        eval evaluates the given expression and returns the resulting value. exec
+        executes the given code (typically a set of statements) returning the result,
+        and exec_file executes the code contained in the given file.
+      </p>
+<p>
+        The <tt class="literal">globals</tt> and <tt class="literal">locals</tt> parameters are
+        Python dictionaries containing the globals and locals of the context in which
+        to run the code. For most intents and purposes you can use the namespace
+        dictionary of the <tt class="literal"><span class="underline">_main</span>_</tt>
+        module for both parameters.
+      </p>
+<p>
+        Boost.python provides a function to import a module:
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">import</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">name</span><span class="special">)</span>
+</pre>
+<p>
+        import imports a python module (potentially loading it into the running process
+        first), and returns it.
+      </p>
+<p>
+        Let's import the <tt class="literal"><span class="underline">_main</span>_</tt>
+        module and run some Python code in its namespace:
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">main_module</span> <span class="special">=</span> <span class="identifier">import</span><span class="special">(</span><span class="string">"__main__"</span><span class="special">);</span>
+<span class="identifier">object</span> <span class="identifier">main_namespace</span> <span class="special">=</span> <span class="identifier">main_module</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">);</span>
+
+<span class="identifier">object</span> <span class="identifier">ignored</span> <span class="special">=</span> <span class="identifier">exec</span><span class="special">(</span><span class="string">"hello = file('hello.txt', 'w')\n"</span>
+                      <span class="string">"hello.write('Hello world!')\n"</span>
+                      <span class="string">"hello.close()"</span><span class="special">,</span>
+                      <span class="identifier">main_namespace</span><span class="special">);</span>
+</pre>
+<p>
+        This should create a file called 'hello.txt' in the current directory containing
+        a phrase that is well-known in programming circles.
+      </p>
+<a name="using_the_interpreter.manipulating_python_objects"></a><h2>
+<a name="id472186"></a>
+        Manipulating Python objects
+      </h2>
+<p>
+        Often we'd like to have a class to manipulate Python objects. But we have
+        already seen such a class above, and in the <a href="object.html" target="_top">previous
+        section</a>: the aptly named <tt class="literal">object</tt> class and its
+        derivatives. We've already seen that they can be constructed from a <tt class="literal">handle</tt>.
+        The following examples should further illustrate this fact:
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">main_module</span> <span class="special">=</span> <span class="identifier">import</span><span class="special">(</span><span class="string">"__main__"</span><span class="special">);</span>
+<span class="identifier">object</span> <span class="identifier">main_namespace</span> <span class="special">=</span> <span class="identifier">main_module</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">);</span>
+<span class="identifier">object</span> <span class="identifier">ignored</span> <span class="special">=</span> <span class="identifier">exec</span><span class="special">(</span><span class="string">"result = 5 ** 2"</span><span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">);</span>
+<span class="keyword">int</span> <span class="identifier">five_squared</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="identifier">main_namespace</span><span class="special">[</span><span class="string">"result"</span><span class="special">]);</span>
+</pre>
+<p>
+        Here we create a dictionary object for the <tt class="literal"><span class="underline">_main</span>_</tt>
+        module's namespace. Then we assign 5 squared to the result variable and read
+        this variable from the dictionary. Another way to achieve the same result
+        is to use eval instead, which returns the result directly:
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">eval</span><span class="special">(</span><span class="string">"5 ** 2"</span><span class="special">);</span>
+<span class="keyword">int</span> <span class="identifier">five_squared</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="identifier">result</span><span class="special">);</span>
+</pre>
+<a name="using_the_interpreter.exception_handling"></a><h2>
+<a name="id472558"></a>
+        Exception handling
+      </h2>
+<p>
+        If an exception occurs in the evaluation of the python expression, <a href="../../../../v2/errors.html#error_already_set-spec" target="_top">error_already_set</a>
+        is thrown:
+      </p>
+<pre class="programlisting">
+<span class="keyword">try</span>
+<span class="special">{</span>
+    <span class="identifier">object</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">eval</span><span class="special">(</span><span class="string">"5/0"</span><span class="special">);</span>
+    <span class="comment">// execution will never get here:
+</span>    <span class="keyword">int</span> <span class="identifier">five_divided_by_zero</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="identifier">result</span><span class="special">);</span>
+<span class="special">}</span>
+<span class="keyword">catch</span><span class="special">(</span><span class="identifier">error_already_set</span> <span class="keyword">const</span> <span class="special">&amp;)</span>
+<span class="special">{</span>
+    <span class="comment">// handle the exception in some way
+</span><span class="special">}</span>
+</pre>
+<p>
+        The <tt class="literal">error_already_set</tt> exception class doesn't carry any
+        information in itself. To find out more about the Python exception that occurred,
+        you need to use the <a href="http://www.python.org/doc/api/exceptionHandling.html" target="_top">exception
+        handling functions</a> of the Python<span class="emphasis"><em>C API in your catch-statement.
+        This can be as simple as calling [@http:</em></span>/www.python.org/doc/api/exceptionHandling.html#l2h-70
+        PyErr_Print()] to print the exception's traceback to the console, or comparing
+        the type of the exception with those of the <a href="http://www.python.org/doc/api/standardExceptions.html" target="_top">standard
+        exceptions</a>:
+      </p>
+<pre class="programlisting">
+<span class="keyword">catch</span><span class="special">(</span><span class="identifier">error_already_set</span> <span class="keyword">const</span> <span class="special">&amp;)</span>
+<span class="special">{</span>
+    <span class="keyword">if</span> <span class="special">(</span><span class="identifier">PyErr_ExceptionMatches</span><span class="special">(</span><span class="identifier">PyExc_ZeroDivisionError</span><span class="special">))</span>
+    <span class="special">{</span>
+        <span class="comment">// handle ZeroDivisionError specially
+</span>    <span class="special">}</span>
+    <span class="keyword">else</span>
+    <span class="special">{</span>
+        <span class="comment">// print all other errors to stderr
+</span>        <span class="identifier">PyErr_Print</span><span class="special">();</span>
+    <span class="special">}</span>
+<span class="special">}</span>
+</pre>
+<p>
+        (To retrieve even more information from the exception you can use some of
+        the other exception handling functions listed <a href="http://www.python.org/doc/api/exceptionHandling.html" target="_top">here</a>.)
+      </p>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="object.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="iterators.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
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@@ -0,0 +1,65 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title> Exception Translation</title>
+<link rel="stylesheet" href="../../../../../../../doc/html/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
+<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
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+<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
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+<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
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+<td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
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+<hr>
+<div class="spirit-nav">
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+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.exception"></a> Exception Translation</h2></div></div></div>
+<p>
+      All C++ exceptions must be caught at the boundary with Python code. This boundary
+      is the point where C++ meets Python. Boost.Python provides a default exception
+      handler that translates selected standard exceptions, then gives up:
+    </p>
+<pre class="programlisting">
+<span class="keyword">raise</span> <span class="identifier">RuntimeError</span><span class="special">,</span> <span class="string">'unidentifiable C++ Exception'</span>
+</pre>
+<p>
+      Users may provide custom translation. Here's an example:
+    </p>
+<pre class="programlisting">
+<span class="identifier">struct</span> <span class="identifier">PodBayDoorException</span><span class="special">;</span>
+<span class="identifier">void</span> <span class="identifier">translator</span><span class="special">(</span><span class="identifier">PodBayDoorException</span> <span class="identifier">const</span><span class="special">&amp;</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span>
+    <span class="identifier">PyErr_SetString</span><span class="special">(</span><span class="identifier">PyExc_UserWarning</span><span class="special">,</span> <span class="string">"I'm sorry Dave..."</span><span class="special">);</span>
+<span class="special">}</span>
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">kubrick</span><span class="special">)</span> <span class="special">{</span>
+     <span class="identifier">register_exception_translator</span><span class="special">&lt;</span>
+          <span class="identifier">PodBayDoorException</span><span class="special">&gt;(</span><span class="identifier">translator</span><span class="special">);</span>
+     <span class="special">...</span>
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="iterators.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="techniques.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
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+</body>
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doc/tutorial/doc/html/python/exposing.html

@@ -0,0 +1,640 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title> Exposing Classes</title>
+<link rel="stylesheet" href="../../../../../../../doc/html/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
+<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
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+<td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
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+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="hello.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="functions.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.exposing"></a> Exposing Classes</h2></div></div></div>
+<div class="toc"><dl>
+<dt><span class="section"><a href="exposing.html#python.constructors">Constructors</a></span></dt>
+<dt><span class="section"><a href="exposing.html#python.class_data_members">Class Data Members</a></span></dt>
+<dt><span class="section"><a href="exposing.html#python.class_properties">Class Properties</a></span></dt>
+<dt><span class="section"><a href="exposing.html#python.inheritance">Inheritance</a></span></dt>
+<dt><span class="section"><a href="exposing.html#python.class_virtual_functions">Class Virtual Functions</a></span></dt>
+<dt><span class="section"><a href="exposing.html#python.virtual_functions_with_default_implementations">Virtual Functions with Default Implementations</a></span></dt>
+<dt><span class="section"><a href="exposing.html#python.class_operators_special_functions">Class Operators/Special Functions</a></span></dt>
+</dl></div>
+<p>
+      Now let's expose a C++ class to Python.
+    </p>
+<p>
+      Consider a C++ class/struct that we want to expose to Python:
+    </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">World</span>
+<span class="special">{</span>
+    <span class="keyword">void</span> <span class="identifier">set</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">msg</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">this</span><span class="special">-&gt;</span><span class="identifier">msg</span> <span class="special">=</span> <span class="identifier">msg</span><span class="special">;</span> <span class="special">}</span>
+    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">greet</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">msg</span><span class="special">;</span> <span class="special">}</span>
+    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">msg</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+      We can expose this to Python by writing a corresponding Boost.Python C++ Wrapper:
+    </p>
+<pre class="programlisting">
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">;</span>
+
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">hello</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">World</span><span class="special">&gt;(</span><span class="string">"World"</span><span class="special">)</span>
+        <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"greet"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">World</span><span class="special">::</span><span class="identifier">greet</span><span class="special">)</span>
+        <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"set"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">World</span><span class="special">::</span><span class="identifier">set</span><span class="special">)</span>
+    <span class="special">;</span>
+<span class="special">}</span>
+</pre>
+<p>
+      Here, we wrote a C++ class wrapper that exposes the member functions <tt class="literal">greet</tt>
+      and <tt class="literal">set</tt>. Now, after building our module as a shared library,
+      we may use our class <tt class="literal">World</tt> in Python. Here's a sample Python
+      session:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">import</span> <span class="identifier">hello</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">planet</span> <span class="special">=</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">World</span><span class="special">()</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">planet</span><span class="special">.</span><span class="identifier">set</span><span class="special">(</span><span class="string">'howdy'</span><span class="special">)</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">planet</span><span class="special">.</span><span class="identifier">greet</span><span class="special">()</span>
+<span class="string">'howdy'</span>
+</pre>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.constructors"></a>Constructors</h3></div></div></div>
+<p>
+        Our previous example didn't have any explicit constructors. Since <tt class="literal">World</tt>
+        is declared as a plain struct, it has an implicit default constructor. Boost.Python
+        exposes the default constructor by default, which is why we were able to
+        write
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">planet</span> <span class="special">=</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">World</span><span class="special">()</span>
+</pre>
+<p>
+        We may wish to wrap a class with a non-default constructor. Let us build
+        on our previous example:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">World</span>
+<span class="special">{</span>
+    <span class="identifier">World</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">msg</span><span class="special">):</span> <span class="identifier">msg</span><span class="special">(</span><span class="identifier">msg</span><span class="special">)</span> <span class="special">{}</span> <span class="comment">// added constructor
+</span>    <span class="keyword">void</span> <span class="identifier">set</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">msg</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">this</span><span class="special">-&gt;</span><span class="identifier">msg</span> <span class="special">=</span> <span class="identifier">msg</span><span class="special">;</span> <span class="special">}</span>
+    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">greet</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">msg</span><span class="special">;</span> <span class="special">}</span>
+    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">msg</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        This time <tt class="literal">World</tt> has no default constructor; our previous
+        wrapping code would fail to compile when the library tried to expose it.
+        We have to tell <tt class="literal">class_&lt;World&gt;</tt> about the constructor
+        we want to expose instead.
+      </p>
+<pre class="programlisting">
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">;</span>
+
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">hello</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">World</span><span class="special">&gt;(</span><span class="string">"World"</span><span class="special">,</span> <span class="identifier">init</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;())</span>
+        <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"greet"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">World</span><span class="special">::</span><span class="identifier">greet</span><span class="special">)</span>
+        <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"set"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">World</span><span class="special">::</span><span class="identifier">set</span><span class="special">)</span>
+    <span class="special">;</span>
+<span class="special">}</span>
+</pre>
+<p>
+        <tt class="literal">init&lt;std::string&gt;()</tt> exposes the constructor taking
+        in a <tt class="literal">std::string</tt> (in Python, constructors are spelled
+        "<tt class="literal">"<span class="underline">_init</span>_"</tt>").
+      </p>
+<p>
+        We can expose additional constructors by passing more <tt class="literal">init&lt;...&gt;</tt>s
+        to the <tt class="literal">def()</tt> member function. Say for example we have
+        another World constructor taking in two doubles:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">World</span><span class="special">&gt;(</span><span class="string">"World"</span><span class="special">,</span> <span class="identifier">init</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;())</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">init</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;())</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"greet"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">World</span><span class="special">::</span><span class="identifier">greet</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"set"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">World</span><span class="special">::</span><span class="identifier">set</span><span class="special">)</span>
+<span class="special">;</span>
+</pre>
+<p>
+        On the other hand, if we do not wish to expose any constructors at all, we
+        may use <tt class="literal">no_init</tt> instead:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">Abstract</span><span class="special">&gt;(</span><span class="string">"Abstract"</span><span class="special">,</span> <span class="identifier">no_init</span><span class="special">)</span>
+</pre>
+<p>
+        This actually adds an <tt class="literal"><span class="underline">_init</span>_</tt>
+        method which always raises a Python RuntimeError exception.
+      </p>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.class_data_members"></a>Class Data Members</h3></div></div></div>
+<p>
+        Data members may also be exposed to Python so that they can be accessed as
+        attributes of the corresponding Python class. Each data member that we wish
+        to be exposed may be regarded as <span class="bold"><b>read-only</b></span>
+        or <span class="bold"><b>read-write</b></span>. Consider this class <tt class="literal">Var</tt>:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">Var</span>
+<span class="special">{</span>
+    <span class="identifier">Var</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">name</span><span class="special">)</span> <span class="special">:</span> <span class="identifier">name</span><span class="special">(</span><span class="identifier">name</span><span class="special">),</span> <span class="identifier">value</span><span class="special">()</span> <span class="special">{}</span>
+    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">const</span> <span class="identifier">name</span><span class="special">;</span>
+    <span class="keyword">float</span> <span class="identifier">value</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Our C++ <tt class="literal">Var</tt> class and its data members can be exposed
+        to Python:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">Var</span><span class="special">&gt;(</span><span class="string">"Var"</span><span class="special">,</span> <span class="identifier">init</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;())</span>
+    <span class="special">.</span><span class="identifier">def_readonly</span><span class="special">(</span><span class="string">"name"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Var</span><span class="special">::</span><span class="identifier">name</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">def_readwrite</span><span class="special">(</span><span class="string">"value"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Var</span><span class="special">::</span><span class="identifier">value</span><span class="special">);</span>
+</pre>
+<p>
+        Then, in Python, assuming we have placed our Var class inside the namespace
+        hello as we did before:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">Var</span><span class="special">(</span><span class="string">'pi'</span><span class="special">)</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">value</span> <span class="special">=</span> <span class="number">3.14</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">print</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">name</span><span class="special">,</span> <span class="string">'is around'</span><span class="special">,</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">value</span>
+<span class="identifier">pi</span> <span class="keyword">is</span> <span class="identifier">around</span> <span class="number">3.14</span>
+</pre>
+<p>
+        Note that <tt class="literal">name</tt> is exposed as <span class="bold"><b>read-only</b></span>
+        while <tt class="literal">value</tt> is exposed as <span class="bold"><b>read-write</b></span>.
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">name</span> <span class="special">=</span> <span class="string">'e'</span> <span class="comment"># can't change name
+</span><span class="identifier">Traceback</span> <span class="special">(</span><span class="identifier">most</span> <span class="identifier">recent</span> <span class="identifier">call</span> <span class="identifier">last</span><span class="special">):</span>
+  <span class="identifier">File</span> <span class="string">"&lt;stdin&gt;"</span><span class="special">,</span> <span class="identifier">line</span> <span class="number">1</span><span class="special">,</span> <span class="keyword">in</span> #
+<span class="identifier">AttributeError</span><span class="special">:</span> <span class="identifier">can</span>#<span class="identifier">t</span> <span class="identifier">set</span> <span class="identifier">attribute</span>
+</pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.class_properties"></a>Class Properties</h3></div></div></div>
+<p>
+        In C++, classes with public data members are usually frowned upon. Well designed
+        classes that take advantage of encapsulation hide the class' data members.
+        The only way to access the class' data is through access (getter/setter)
+        functions. Access functions expose class properties. Here's an example:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">Num</span>
+<span class="special">{</span>
+    <span class="identifier">Num</span><span class="special">();</span>
+    <span class="keyword">float</span> <span class="identifier">get</span><span class="special">()</span> <span class="keyword">const</span><span class="special">;</span>
+    <span class="keyword">void</span> <span class="identifier">set</span><span class="special">(</span><span class="keyword">float</span> <span class="identifier">value</span><span class="special">);</span>
+    <span class="special">...</span>
+<span class="special">};</span>
+</pre>
+<p>
+        However, in Python attribute access is fine; it doesn't neccessarily break
+        encapsulation to let users handle attributes directly, because the attributes
+        can just be a different syntax for a method call. Wrapping our <tt class="literal">Num</tt>
+        class using Boost.Python:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">Num</span><span class="special">&gt;(</span><span class="string">"Num"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">add_property</span><span class="special">(</span><span class="string">"rovalue"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Num</span><span class="special">::</span><span class="identifier">get</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">add_property</span><span class="special">(</span><span class="string">"value"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Num</span><span class="special">::</span><span class="identifier">get</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Num</span><span class="special">::</span><span class="identifier">set</span><span class="special">);</span>
+</pre>
+<p>
+        And at last, in Python:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">Num</span><span class="special">()</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">value</span> <span class="special">=</span> <span class="number">3.14</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">rovalue</span>
+<span class="special">(</span><span class="number">3.14</span><span class="special">,</span> <span class="number">3.14</span><span class="special">)</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">rovalue</span> <span class="special">=</span> <span class="number">2.17</span> <span class="comment"># error!
+</span></pre>
+<p>
+        Take note that the class property <tt class="literal">rovalue</tt> is exposed as
+        <span class="bold"><b>read-only</b></span> since the <tt class="literal">rovalue</tt>
+        setter member function is not passed in:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">.</span><span class="identifier">add_property</span><span class="special">(</span><span class="string">"rovalue"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Num</span><span class="special">::</span><span class="identifier">get</span><span class="special">)</span>
+</pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.inheritance"></a>Inheritance</h3></div></div></div>
+<p>
+        In the previous examples, we dealt with classes that are not polymorphic.
+        This is not often the case. Much of the time, we will be wrapping polymorphic
+        classes and class hierarchies related by inheritance. We will often have
+        to write Boost.Python wrappers for classes that are derived from abstract
+        base classes.
+      </p>
+<p>
+        Consider this trivial inheritance structure:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">Base</span> <span class="special">{</span> <span class="keyword">virtual</span> <span class="special">~</span><span class="identifier">Base</span><span class="special">();</span> <span class="special">};</span>
+<span class="keyword">struct</span> <span class="identifier">Derived</span> <span class="special">:</span> <span class="identifier">Base</span> <span class="special">{};</span>
+</pre>
+<p>
+        And a set of C++ functions operating on <tt class="literal">Base</tt> and <tt class="literal">Derived</tt>
+        object instances:
+      </p>
+<pre class="programlisting">
+<span class="keyword">void</span> <span class="identifier">b</span><span class="special">(</span><span class="identifier">Base</span><span class="special">*);</span>
+<span class="keyword">void</span> <span class="identifier">d</span><span class="special">(</span><span class="identifier">Derived</span><span class="special">*);</span>
+<span class="identifier">Base</span><span class="special">*</span> <span class="identifier">factory</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="keyword">new</span> <span class="identifier">Derived</span><span class="special">;</span> <span class="special">}</span>
+</pre>
+<p>
+        We've seen how we can wrap the base class <tt class="literal">Base</tt>:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">Base</span><span class="special">&gt;(</span><span class="string">"Base"</span><span class="special">)</span>
+    <span class="comment">/*...*/</span>
+    <span class="special">;</span>
+</pre>
+<p>
+        Now we can inform Boost.Python of the inheritance relationship between <tt class="literal">Derived</tt>
+        and its base class <tt class="literal">Base</tt>. Thus:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">Derived</span><span class="special">,</span> <span class="identifier">bases</span><span class="special">&lt;</span><span class="identifier">Base</span><span class="special">&gt;</span> <span class="special">&gt;(</span><span class="string">"Derived"</span><span class="special">)</span>
+    <span class="comment">/*...*/</span>
+    <span class="special">;</span>
+</pre>
+<p>
+        Doing so, we get some things for free:
+      </p>
+<div class="orderedlist"><ol type="1">
+<li>
+          Derived automatically inherits all of Base's Python methods (wrapped C++
+          member functions)
+        </li>
+<li>
+<span class="bold"><b>If</b></span> Base is polymorphic, <tt class="literal">Derived</tt>
+          objects which have been passed to Python via a pointer or reference to
+          <tt class="literal">Base</tt> can be passed where a pointer or reference to
+          <tt class="literal">Derived</tt> is expected.
+        </li>
+</ol></div>
+<p>
+        Now, we will expose the C++ free functions <tt class="literal">b</tt> and <tt class="literal">d</tt>
+        and <tt class="literal">factory</tt>:
+      </p>
+<pre class="programlisting">
+<span class="identifier">def</span><span class="special">(</span><span class="string">"b"</span><span class="special">,</span> <span class="identifier">b</span><span class="special">);</span>
+<span class="identifier">def</span><span class="special">(</span><span class="string">"d"</span><span class="special">,</span> <span class="identifier">d</span><span class="special">);</span>
+<span class="identifier">def</span><span class="special">(</span><span class="string">"factory"</span><span class="special">,</span> <span class="identifier">factory</span><span class="special">);</span>
+</pre>
+<p>
+        Note that free function <tt class="literal">factory</tt> is being used to generate
+        new instances of class <tt class="literal">Derived</tt>. In such cases, we use
+        <tt class="literal">return_value_policy&lt;manage_new_object&gt;</tt> to instruct
+        Python to adopt the pointer to <tt class="literal">Base</tt> and hold the instance
+        in a new Python <tt class="literal">Base</tt> object until the the Python object
+        is destroyed. We will see more of Boost.Python <a href="functions.html#python.call_policies" title="Call Policies">call
+        policies</a> later.
+      </p>
+<pre class="programlisting">
+<span class="comment">// Tell Python to take ownership of factory's result
+</span><span class="identifier">def</span><span class="special">(</span><span class="string">"factory"</span><span class="special">,</span> <span class="identifier">factory</span><span class="special">,</span>
+    <span class="identifier">return_value_policy</span><span class="special">&lt;</span><span class="identifier">manage_new_object</span><span class="special">&gt;());</span>
+</pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.class_virtual_functions"></a>Class Virtual Functions</h3></div></div></div>
+<p>
+        In this section, we will learn how to make functions behave polymorphically
+        through virtual functions. Continuing our example, let us add a virtual function
+        to our <tt class="literal">Base</tt> class:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">Base</span>
+<span class="special">{</span>
+    <span class="keyword">virtual</span> <span class="special">~</span><span class="identifier">Base</span><span class="special">()</span> <span class="special">{}</span>
+    <span class="keyword">virtual</span> <span class="keyword">int</span> <span class="identifier">f</span><span class="special">()</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        One of the goals of Boost.Python is to be minimally intrusive on an existing
+        C++ design. In principle, it should be possible to expose the interface for
+        a 3rd party library without changing it. It is not ideal to add anything
+        to our class <tt class="computeroutput"><span class="identifier">Base</span></tt>. Yet, when
+        you have a virtual function that's going to be overridden in Python and called
+        polymorphically <span class="bold"><b>from C++</b></span>, we'll need to
+        add some scaffoldings to make things work properly. What we'll do is write
+        a class wrapper that derives from <tt class="computeroutput"><span class="identifier">Base</span></tt>
+        that will unintrusively hook into the virtual functions so that a Python
+        override may be called:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">BaseWrap</span> <span class="special">:</span> <span class="identifier">Base</span><span class="special">,</span> <span class="identifier">wrapper</span><span class="special">&lt;</span><span class="identifier">Base</span><span class="special">&gt;</span>
+<span class="special">{</span>
+    <span class="keyword">int</span> <span class="identifier">f</span><span class="special">()</span>
+    <span class="special">{</span>
+        <span class="keyword">return</span> <span class="keyword">this</span><span class="special">-&gt;</span><span class="identifier">get_override</span><span class="special">(</span><span class="string">"f"</span><span class="special">)();</span>
+    <span class="special">}</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Notice too that in addition to inheriting from <tt class="computeroutput"><span class="identifier">Base</span></tt>,
+        we also multiply- inherited <tt class="computeroutput"><span class="identifier">wrapper</span><span class="special">&lt;</span><span class="identifier">Base</span><span class="special">&gt;</span></tt> (See <a href="../../../../v2/wrapper.html" target="_top">Wrapper</a>).
+        The <tt class="computeroutput"><span class="identifier">wrapper</span></tt> template makes
+        the job of wrapping classes that are meant to overridden in Python, easier.
+      </p>
+<div class="sidebar">
+<p>
+        <span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><b>MSVC6/7 Workaround</b></span>
+      </p>
+<p>
+        If you are using Microsoft Visual C++ 6 or 7, you have to write <tt class="computeroutput"><span class="identifier">f</span></tt> as:
+      </p>
+<p>
+        <tt class="computeroutput"><span class="keyword">return</span> <span class="identifier">call</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="keyword">this</span><span class="special">-&gt;</span><span class="identifier">get_override</span><span class="special">(</span><span class="string">"f"</span><span class="special">).</span><span class="identifier">ptr</span><span class="special">());</span></tt>.
+      </p>
+</div>
+<p>
+        BaseWrap's overridden virtual member function <tt class="computeroutput"><span class="identifier">f</span></tt>
+        in effect calls the corresponding method of the Python object through <tt class="computeroutput"><span class="identifier">get_override</span></tt>.
+      </p>
+<p>
+        Finally, exposing <tt class="computeroutput"><span class="identifier">Base</span></tt>:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">BaseWrap</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">noncopyable</span><span class="special">&gt;(</span><span class="string">"Base"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">pure_virtual</span><span class="special">(&amp;</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">))</span>
+    <span class="special">;</span>
+</pre>
+<p>
+        <tt class="computeroutput"><span class="identifier">pure_virtual</span></tt> signals Boost.Python
+        that the function <tt class="computeroutput"><span class="identifier">f</span></tt> is a
+        pure virtual function.
+      </p>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top">
+<p>
+          <span class="bold"><b>member function and methods</b></span>
+        </p>
+<p>
+          Python, like many object oriented languages uses the term <span class="bold"><b>methods</b></span>.
+          Methods correspond roughly to C++'s <span class="bold"><b>member functions</b></span>
+        </p>
+</td></tr>
+</table></div>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.virtual_functions_with_default_implementations"></a>Virtual Functions with Default Implementations</h3></div></div></div>
+<p>
+        We've seen in the previous section how classes with pure virtual functions
+        are wrapped using Boost.Python's <a href="../../../../v2/wrapper.html" target="_top">class
+        wrapper</a> facilities. If we wish to wrap <span class="bold"><b>non</b></span>-pure-virtual
+        functions instead, the mechanism is a bit different.
+      </p>
+<p>
+        Recall that in the <a href="exposing.html#python.class_virtual_functions" title="Class Virtual Functions">previous
+        section</a>, we wrapped a class with a pure virtual function that we then
+        implemented in C++, or Python classes derived from it. Our base class:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">Base</span>
+<span class="special">{</span>
+    <span class="keyword">virtual</span> <span class="keyword">int</span> <span class="identifier">f</span><span class="special">()</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        had a pure virtual function <tt class="literal">f</tt>. If, however, its member
+        function <tt class="literal">f</tt> was not declared as pure virtual:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">Base</span>
+<span class="special">{</span>
+    <span class="keyword">virtual</span> <span class="special">~</span><span class="identifier">Base</span><span class="special">()</span> <span class="special">{}</span>
+    <span class="keyword">virtual</span> <span class="keyword">int</span> <span class="identifier">f</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> <span class="special">}</span>
+<span class="special">};</span>
+</pre>
+<p>
+        We wrap it this way:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">BaseWrap</span> <span class="special">:</span> <span class="identifier">Base</span><span class="special">,</span> <span class="identifier">wrapper</span><span class="special">&lt;</span><span class="identifier">Base</span><span class="special">&gt;</span>
+<span class="special">{</span>
+    <span class="keyword">int</span> <span class="identifier">f</span><span class="special">()</span>
+    <span class="special">{</span>
+        <span class="keyword">if</span> <span class="special">(</span><span class="identifier">override</span> <span class="identifier">f</span> <span class="special">=</span> <span class="keyword">this</span><span class="special">-&gt;</span><span class="identifier">get_override</span><span class="special">(</span><span class="string">"f"</span><span class="special">))</span>
+            <span class="keyword">return</span> <span class="identifier">f</span><span class="special">();</span> <span class="comment">// *note*
+</span>        <span class="keyword">return</span> <span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">();</span>
+    <span class="special">}</span>
+
+    <span class="keyword">int</span> <span class="identifier">default_f</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="keyword">this</span><span class="special">-&gt;</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">();</span> <span class="special">}</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Notice how we implemented <tt class="computeroutput"><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">f</span></tt>. Now,
+        we have to check if there is an override for <tt class="computeroutput"><span class="identifier">f</span></tt>.
+        If none, then we call <tt class="computeroutput"><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">()</span></tt>.
+      </p>
+<div class="sidebar">
+<p>
+        <span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><b>MSVC6/7 Workaround</b></span>
+      </p>
+<p>
+        If you are using Microsoft Visual C++ 6 or 7, you have to rewrite the line
+        with the <tt class="computeroutput"><span class="special">*</span><span class="identifier">note</span><span class="special">*</span></tt> as:
+      </p>
+<p>
+        <tt class="computeroutput"><span class="keyword">return</span> <span class="identifier">call</span><span class="special">&lt;</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*&gt;(</span><span class="identifier">f</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">());</span></tt>.
+      </p>
+</div>
+<p>
+        Finally, exposing:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">BaseWrap</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">noncopyable</span><span class="special">&gt;(</span><span class="string">"Base"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">default_f</span><span class="special">)</span>
+    <span class="special">;</span>
+</pre>
+<p>
+        Take note that we expose both <tt class="computeroutput"><span class="special">&amp;</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span></tt> and <tt class="computeroutput"><span class="special">&amp;</span><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">default_f</span></tt>. Boost.Python needs to keep track
+        of 1) the dispatch function <tt class="literal">f</tt> and 2) the forwarding function
+        to its default implementation <tt class="literal">default_f</tt>. There's a special
+        <tt class="literal">def</tt> function for this purpose.
+      </p>
+<p>
+        In Python, the results would be as expected:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">base</span> <span class="special">=</span> <span class="identifier">Base</span><span class="special">()</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">class</span> <span class="identifier">Derived</span><span class="special">(</span><span class="identifier">Base</span><span class="special">):</span>
+<span class="special">...</span>     <span class="keyword">def</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">self</span><span class="special">):</span>
+<span class="special">...</span>         <span class="keyword">return</span> <span class="number">42</span>
+<span class="special">...</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">derived</span> <span class="special">=</span> <span class="identifier">Derived</span><span class="special">()</span>
+</pre>
+<p>
+        Calling <tt class="literal">base.f()</tt>:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">base</span><span class="special">.</span><span class="identifier">f</span><span class="special">()</span>
+<span class="number">0</span>
+</pre>
+<p>
+        Calling <tt class="literal">derived.f()</tt>:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">derived</span><span class="special">.</span><span class="identifier">f</span><span class="special">()</span>
+<span class="number">42</span>
+</pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.class_operators_special_functions"></a>Class Operators/Special Functions</h3></div></div></div>
+<a name="class_operators_special_functions.python_operators"></a><h2>
+<a name="id461482"></a>
+        Python Operators
+      </h2>
+<p>
+        C is well known for the abundance of operators. C++ extends this to the extremes
+        by allowing operator overloading. Boost.Python takes advantage of this and
+        makes it easy to wrap C++ operator-powered classes.
+      </p>
+<p>
+        Consider a file position class <tt class="literal">FilePos</tt> and a set of operators
+        that take on FilePos instances:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="keyword">class</span> <span class="identifier">FilePos</span> <span class="special">{</span> <span class="comment">/*...*/</span> <span class="special">};</span>
+
+<span class="identifier">FilePos</span>     <span class="keyword">operator</span><span class="special">+(</span><span class="identifier">FilePos</span><span class="special">,</span> <span class="keyword">int</span><span class="special">);</span>
+<span class="identifier">FilePos</span>     <span class="keyword">operator</span><span class="special">+(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">FilePos</span><span class="special">);</span>
+<span class="keyword">int</span>         <span class="keyword">operator</span><span class="special">-(</span><span class="identifier">FilePos</span><span class="special">,</span> <span class="identifier">FilePos</span><span class="special">);</span>
+<span class="identifier">FilePos</span>     <span class="keyword">operator</span><span class="special">-(</span><span class="identifier">FilePos</span><span class="special">,</span> <span class="keyword">int</span><span class="special">);</span>
+<span class="identifier">FilePos</span><span class="special">&amp;</span>    <span class="keyword">operator</span><span class="special">+=(</span><span class="identifier">FilePos</span><span class="special">&amp;,</span> <span class="keyword">int</span><span class="special">);</span>
+<span class="identifier">FilePos</span><span class="special">&amp;</span>    <span class="keyword">operator</span><span class="special">-=(</span><span class="identifier">FilePos</span><span class="special">&amp;,</span> <span class="keyword">int</span><span class="special">);</span>
+<span class="keyword">bool</span>        <span class="keyword">operator</span><span class="special">&lt;(</span><span class="identifier">FilePos</span><span class="special">,</span> <span class="identifier">FilePos</span><span class="special">);</span>
+</pre>
+<p>
+        The class and the various operators can be mapped to Python rather easily
+        and intuitively:
+      </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">FilePos</span><span class="special">&gt;(</span><span class="string">"FilePos"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">self</span> <span class="special">+</span> <span class="keyword">int</span><span class="special">())</span>          <span class="comment">// __add__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="keyword">int</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">self</span><span class="special">)</span>          <span class="comment">// __radd__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">self</span> <span class="special">-</span> <span class="identifier">self</span><span class="special">)</span>           <span class="comment">// __sub__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">self</span> <span class="special">-</span> <span class="keyword">int</span><span class="special">())</span>          <span class="comment">// __sub__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">self</span> <span class="special">+=</span> <span class="keyword">int</span><span class="special">())</span>         <span class="comment">// __iadd__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">self</span> <span class="special">-=</span> <span class="identifier">other</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;())</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">self</span> <span class="special">&lt;</span> <span class="identifier">self</span><span class="special">);</span>          <span class="comment">// __lt__
+</span></pre>
+<p>
+        The code snippet above is very clear and needs almost no explanation at all.
+        It is virtually the same as the operators' signatures. Just take note that
+        <tt class="literal">self</tt> refers to FilePos object. Also, not every class
+        <tt class="literal">T</tt> that you might need to interact with in an operator
+        expression is (cheaply) default-constructible. You can use <tt class="literal">other&lt;T&gt;()</tt>
+        in place of an actual <tt class="literal">T</tt> instance when writing "self
+        expressions".
+      </p>
+<a name="class_operators_special_functions.special_methods"></a><h2>
+<a name="id462239"></a>
+        Special Methods
+      </h2>
+<p>
+        Python has a few more <span class="emphasis"><em>Special Methods</em></span>. Boost.Python
+        supports all of the standard special method names supported by real Python
+        class instances. A similar set of intuitive interfaces can also be used to
+        wrap C++ functions that correspond to these Python <span class="emphasis"><em>special functions</em></span>.
+        Example:
+      </p>
+<pre class="programlisting">
+<span class="keyword">class</span> <span class="identifier">Rational</span>
+<span class="special">{</span> <span class="keyword">public</span><span class="special">:</span> <span class="keyword">operator</span> <span class="keyword">double</span><span class="special">()</span> <span class="keyword">const</span><span class="special">;</span> <span class="special">};</span>
+
+<span class="identifier">Rational</span> <span class="identifier">pow</span><span class="special">(</span><span class="identifier">Rational</span><span class="special">,</span> <span class="identifier">Rational</span><span class="special">);</span>
+<span class="identifier">Rational</span> <span class="identifier">abs</span><span class="special">(</span><span class="identifier">Rational</span><span class="special">);</span>
+<span class="identifier">ostream</span><span class="special">&amp;</span> <span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="identifier">ostream</span><span class="special">&amp;,</span><span class="identifier">Rational</span><span class="special">);</span>
+
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">Rational</span><span class="special">&gt;(</span><span class="string">"Rational"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">float_</span><span class="special">(</span><span class="identifier">self</span><span class="special">))</span>                  <span class="comment">// __float__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">pow</span><span class="special">(</span><span class="identifier">self</span><span class="special">,</span> <span class="identifier">other</span><span class="special">&lt;</span><span class="identifier">Rational</span><span class="special">&gt;))</span>    <span class="comment">// __pow__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">abs</span><span class="special">(</span><span class="identifier">self</span><span class="special">))</span>                     <span class="comment">// __abs__
+</span>    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">str</span><span class="special">(</span><span class="identifier">self</span><span class="special">))</span>                     <span class="comment">// __str__
+</span>    <span class="special">;</span>
+</pre>
+<p>
+        Need we say more?
+      </p>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top"><p>
+          What is the business of <tt class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></tt>? Well, the method <tt class="computeroutput"><span class="identifier">str</span></tt> requires the <tt class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></tt> to do its work (i.e. <tt class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></tt>
+          is used by the method defined by <tt class="computeroutput"><span class="identifier">def</span><span class="special">(</span><span class="identifier">str</span><span class="special">(</span><span class="identifier">self</span><span class="special">))</span></tt>.
+        </p></td></tr>
+</table></div>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="hello.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="functions.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
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+<hr>
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+<a accesskey="p" href="exposing.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="object.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.functions"></a>Functions</h2></div></div></div>
+<div class="toc"><dl>
+<dt><span class="section"><a href="functions.html#python.call_policies">Call Policies</a></span></dt>
+<dt><span class="section"><a href="functions.html#python.overloading">Overloading</a></span></dt>
+<dt><span class="section"><a href="functions.html#python.default_arguments">Default Arguments</a></span></dt>
+<dt><span class="section"><a href="functions.html#python.auto_overloading">Auto-Overloading</a></span></dt>
+</dl></div>
+<p>
+      In this chapter, we'll look at Boost.Python powered functions in closer detail.
+      We will see some facilities to make exposing C++ functions to Python safe from
+      potential pifalls such as dangling pointers and references. We will also see
+      facilities that will make it even easier for us to expose C++ functions that
+      take advantage of C++ features such as overloading and default arguments.
+    </p>
+<div class="blockquote"><blockquote class="blockquote">
+<p>
+        </p>
+<p>
+          <span class="emphasis"><em>Read on...</em></span>
+        </p>
+<p>
+      </p>
+</blockquote></div>
+<p>
+      But before you do, you might want to fire up Python 2.2 or later and type
+      <tt class="literal">&gt;&gt;&gt; import this</tt>.
+    </p>
+<pre class="programlisting">&gt;&gt;&gt; import this
+The Zen of Python, by Tim Peters
+Beautiful is better than ugly.
+Explicit is better than implicit.
+Simple is better than complex.
+Complex is better than complicated.
+Flat is better than nested.
+Sparse is better than dense.
+Readability counts.
+Special cases aren't special enough to break the rules.
+Although practicality beats purity.
+Errors should never pass silently.
+Unless explicitly silenced.
+In the face of ambiguity, refuse the temptation to guess.
+There should be one-- and preferably only one --obvious way to do it
+Although that way may not be obvious at first unless you're Dutch.
+Now is better than never.
+Although never is often better than <span class="bold"><b>right</b></span> now.
+If the implementation is hard to explain, it's a bad idea.
+If the implementation is easy to explain, it may be a good idea.
+Namespaces are one honking great idea -- let's do more of those!
+</pre>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.call_policies"></a>Call Policies</h3></div></div></div>
+<p>
+        In C++, we often deal with arguments and return types such as pointers and
+        references. Such primitive types are rather, ummmm, low level and they really
+        don't tell us much. At the very least, we don't know the owner of the pointer
+        or the referenced object. No wonder languages such as Java and Python never
+        deal with such low level entities. In C++, it's usually considered a good
+        practice to use smart pointers which exactly describe ownership semantics.
+        Still, even good C++ interfaces use raw references and pointers sometimes,
+        so Boost.Python must deal with them. To do this, it may need your help. Consider
+        the following C++ function:
+      </p>
+<pre class="programlisting">
+<span class="identifier">X</span><span class="special">&amp;</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Y</span><span class="special">&amp;</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">Z</span><span class="special">*</span> <span class="identifier">z</span><span class="special">);</span>
+</pre>
+<p>
+        How should the library wrap this function? A naive approach builds a Python
+        X object around result reference. This strategy might or might not work out.
+        Here's an example where it didn't
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">y</span><span class="special">,</span> <span class="identifier">z</span><span class="special">)</span> <span class="preprocessor"># x</span> <span class="identifier">refers</span> <span class="identifier">to</span> <span class="identifier">some</span> <span class="identifier">C</span><span class="special">++</span> <span class="identifier">X</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">del</span> <span class="identifier">y</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">some_method</span><span class="special">()</span> <span class="preprocessor"># CRASH</span><span class="special">!</span>
+</pre>
+<p>
+        What's the problem?
+      </p>
+<p>
+        Well, what if f() was implemented as shown below:
+      </p>
+<pre class="programlisting">
+<span class="identifier">X</span><span class="special">&amp;</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Y</span><span class="special">&amp;</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">Z</span><span class="special">*</span> <span class="identifier">z</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">y</span><span class="special">.</span><span class="identifier">z</span> <span class="special">=</span> <span class="identifier">z</span><span class="special">;</span>
+    <span class="keyword">return</span> <span class="identifier">y</span><span class="special">.</span><span class="identifier">x</span><span class="special">;</span>
+<span class="special">}</span>
+</pre>
+<p>
+        The problem is that the lifetime of result X&amp; is tied to the lifetime
+        of y, because the f() returns a reference to a member of the y object. This
+        idiom is is not uncommon and perfectly acceptable in the context of C++.
+        However, Python users should not be able to crash the system just by using
+        our C++ interface. In this case deleting y will invalidate the reference
+        to X. We have a dangling reference.
+      </p>
+<p>
+        Here's what's happening:
+      </p>
+<div class="orderedlist"><ol type="1">
+<li>
+<tt class="literal">f</tt> is called passing in a reference to <tt class="literal">y</tt>
+          and a pointer to <tt class="literal">z</tt>
+</li>
+<li>
+          A reference to <tt class="literal">y.x</tt> is returned
+        </li>
+<li>
+<tt class="literal">y</tt> is deleted. <tt class="literal">x</tt> is a dangling reference
+        </li>
+<li>
+<tt class="literal">x.some_method()</tt> is called
+        </li>
+<li><span class="bold"><b>BOOM!</b></span></li>
+</ol></div>
+<p>
+        We could copy result into a new object:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">y</span><span class="special">,</span> <span class="identifier">z</span><span class="special">).</span><span class="identifier">set</span><span class="special">(</span><span class="number">42</span><span class="special">)</span> <span class="comment"># Result disappears
+</span><span class="special">&gt;&gt;&gt;</span> <span class="identifier">y</span><span class="special">.</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">get</span><span class="special">()</span>       <span class="comment"># No crash, but still bad
+</span><span class="number">3.14</span>
+</pre>
+<p>
+        This is not really our intent of our C++ interface. We've broken our promise
+        that the Python interface should reflect the C++ interface as closely as
+        possible.
+      </p>
+<p>
+        Our problems do not end there. Suppose Y is implemented as follows:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">Y</span>
+<span class="special">{</span>
+    <span class="identifier">X</span> <span class="identifier">x</span><span class="special">;</span> <span class="identifier">Z</span><span class="special">*</span> <span class="identifier">z</span><span class="special">;</span>
+    <span class="keyword">int</span> <span class="identifier">z_value</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">z</span><span class="special">-&gt;</span><span class="identifier">value</span><span class="special">();</span> <span class="special">}</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Notice that the data member <tt class="literal">z</tt> is held by class Y using
+        a raw pointer. Now we have a potential dangling pointer problem inside Y:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">y</span><span class="special">,</span> <span class="identifier">z</span><span class="special">)</span> <span class="preprocessor"># y</span> <span class="identifier">refers</span> <span class="identifier">to</span> <span class="identifier">z</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">del</span> <span class="identifier">z</span>       <span class="preprocessor"># Kill</span> <span class="identifier">the</span> <span class="identifier">z</span> <span class="identifier">object</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">y</span><span class="special">.</span><span class="identifier">z_value</span><span class="special">()</span> <span class="preprocessor"># CRASH</span><span class="special">!</span>
+</pre>
+<p>
+        For reference, here's the implementation of <tt class="literal">f</tt> again:
+      </p>
+<pre class="programlisting">
+<span class="identifier">X</span><span class="special">&amp;</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Y</span><span class="special">&amp;</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">Z</span><span class="special">*</span> <span class="identifier">z</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">y</span><span class="special">.</span><span class="identifier">z</span> <span class="special">=</span> <span class="identifier">z</span><span class="special">;</span>
+    <span class="keyword">return</span> <span class="identifier">y</span><span class="special">.</span><span class="identifier">x</span><span class="special">;</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Here's what's happening:
+      </p>
+<div class="orderedlist"><ol type="1">
+<li>
+<tt class="literal">f</tt> is called passing in a reference to <tt class="literal">y</tt>
+          and a pointer to <tt class="literal">z</tt>
+</li>
+<li>
+          A pointer to <tt class="literal">z</tt> is held by <tt class="literal">y</tt>
+</li>
+<li>
+          A reference to <tt class="literal">y.x</tt> is returned
+        </li>
+<li>
+<tt class="literal">z</tt> is deleted. <tt class="literal">y.z</tt> is a dangling pointer
+        </li>
+<li>
+<tt class="literal">y.z_value()</tt> is called
+        </li>
+<li>
+<tt class="literal">z-&gt;value()</tt> is called
+        </li>
+<li><span class="bold"><b>BOOM!</b></span></li>
+</ol></div>
+<a name="call_policies.call_policies"></a><h2>
+<a name="id464236"></a>
+        Call Policies
+      </h2>
+<p>
+        Call Policies may be used in situations such as the example detailed above.
+        In our example, <tt class="literal">return_internal_reference</tt> and <tt class="literal">with_custodian_and_ward</tt>
+        are our friends:
+      </p>
+<pre class="programlisting">
+<span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">f</span><span class="special">,</span>
+    <span class="identifier">return_internal_reference</span><span class="special">&lt;</span><span class="number">1</span><span class="special">,</span>
+        <span class="identifier">with_custodian_and_ward</span><span class="special">&lt;</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">&gt;</span> <span class="special">&gt;());</span>
+</pre>
+<p>
+        What are the <tt class="literal">1</tt> and <tt class="literal">2</tt> parameters, you
+        ask?
+      </p>
+<pre class="programlisting">
+<span class="identifier">return_internal_reference</span><span class="special">&lt;</span><span class="number">1</span>
+</pre>
+<p>
+        Informs Boost.Python that the first argument, in our case <tt class="literal">Y&amp;
+        y</tt>, is the owner of the returned reference: <tt class="literal">X&amp;</tt>.
+        The "<tt class="literal">1</tt>" simply specifies the first argument.
+        In short: "return an internal reference <tt class="literal">X&amp;</tt> owned
+        by the 1st argument <tt class="literal">Y&amp; y</tt>".
+      </p>
+<pre class="programlisting">
+<span class="identifier">with_custodian_and_ward</span><span class="special">&lt;</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">&gt;</span>
+</pre>
+<p>
+        Informs Boost.Python that the lifetime of the argument indicated by ward
+        (i.e. the 2nd argument: <tt class="literal">Z* z</tt>) is dependent on the lifetime
+        of the argument indicated by custodian (i.e. the 1st argument: <tt class="literal">Y&amp;
+        y</tt>).
+      </p>
+<p>
+        It is also important to note that we have defined two policies above. Two
+        or more policies can be composed by chaining. Here's the general syntax:
+      </p>
+<pre class="programlisting">
+<span class="identifier">policy1</span><span class="special">&lt;</span><span class="identifier">args</span><span class="special">...,</span>
+    <span class="identifier">policy2</span><span class="special">&lt;</span><span class="identifier">args</span><span class="special">...,</span>
+        <span class="identifier">policy3</span><span class="special">&lt;</span><span class="identifier">args</span><span class="special">...&gt;</span> <span class="special">&gt;</span> <span class="special">&gt;</span>
+</pre>
+<p>
+        Here is the list of predefined call policies. A complete reference detailing
+        these can be found <a href="../../../../v2/reference.html#models_of_call_policies" target="_top">here</a>.
+      </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+<span class="bold"><b>with_custodian_and_ward</b></span>: Ties lifetimes
+          of the arguments
+        </li>
+<li>
+<span class="bold"><b>with_custodian_and_ward_postcall</b></span>: Ties
+          lifetimes of the arguments and results
+        </li>
+<li>
+<span class="bold"><b>return_internal_reference</b></span>: Ties lifetime
+          of one argument to that of result
+        </li>
+<li>
+<span class="bold"><b>return_value_policy&lt;T&gt; with T one of:</b></span><div class="itemizedlist"><ul type="circle">
+<li>
+<span class="bold"><b>reference_existing_object</b></span>: naive (dangerous)
+              approach
+            </li>
+<li>
+<span class="bold"><b>copy_const_reference</b></span>: Boost.Python
+              v1 approach
+            </li>
+<li>
+<span class="bold"><b>copy_non_const_reference</b></span>:
+            </li>
+<li>
+<span class="bold"><b>manage_new_object</b></span>: Adopt a pointer
+              and hold the instance
+            </li>
+</ul></div>
+</li>
+</ul></div>
+<div class="sidebar">
+<p>
+        <span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span> <span class="bold"><b>Remember the Zen, Luke:</b></span>
+      </p>
+<p>
+        "Explicit is better than implicit"
+      </p>
+<p>
+        "In the face of ambiguity, refuse the temptation to guess"
+      </p>
+</div>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.overloading"></a>Overloading</h3></div></div></div>
+<p>
+        The following illustrates a scheme for manually wrapping an overloaded member
+        functions. Of course, the same technique can be applied to wrapping overloaded
+        non-member functions.
+      </p>
+<p>
+        We have here our C++ class:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">X</span>
+<span class="special">{</span>
+    <span class="keyword">bool</span> <span class="identifier">f</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">a</span><span class="special">)</span>
+    <span class="special">{</span>
+        <span class="keyword">return</span> <span class="keyword">true</span><span class="special">;</span>
+    <span class="special">}</span>
+
+    <span class="keyword">bool</span> <span class="identifier">f</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">b</span><span class="special">)</span>
+    <span class="special">{</span>
+        <span class="keyword">return</span> <span class="keyword">true</span><span class="special">;</span>
+    <span class="special">}</span>
+
+    <span class="keyword">bool</span> <span class="identifier">f</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">b</span><span class="special">,</span> <span class="keyword">char</span> <span class="identifier">c</span><span class="special">)</span>
+    <span class="special">{</span>
+        <span class="keyword">return</span> <span class="keyword">true</span><span class="special">;</span>
+    <span class="special">}</span>
+
+    <span class="keyword">int</span> <span class="identifier">f</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">b</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">c</span><span class="special">)</span>
+    <span class="special">{</span>
+        <span class="keyword">return</span> <span class="identifier">a</span> <span class="special">+</span> <span class="identifier">b</span> <span class="special">+</span> <span class="identifier">c</span><span class="special">;</span>
+    <span class="special">};</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Class X has 4 overloaded functions. We will start by introducing some member
+        function pointer variables:
+      </p>
+<pre class="programlisting">
+<span class="keyword">bool</span>    <span class="special">(</span><span class="identifier">X</span><span class="special">::*</span><span class="identifier">fx1</span><span class="special">)(</span><span class="keyword">int</span><span class="special">)</span>              <span class="special">=</span> <span class="special">&amp;</span><span class="identifier">X</span><span class="special">::</span><span class="identifier">f</span><span class="special">;</span>
+<span class="keyword">bool</span>    <span class="special">(</span><span class="identifier">X</span><span class="special">::*</span><span class="identifier">fx2</span><span class="special">)(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">)</span>      <span class="special">=</span> <span class="special">&amp;</span><span class="identifier">X</span><span class="special">::</span><span class="identifier">f</span><span class="special">;</span>
+<span class="keyword">bool</span>    <span class="special">(</span><span class="identifier">X</span><span class="special">::*</span><span class="identifier">fx3</span><span class="special">)(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">char</span><span class="special">)=</span> <span class="special">&amp;</span><span class="identifier">X</span><span class="special">::</span><span class="identifier">f</span><span class="special">;</span>
+<span class="keyword">int</span>     <span class="special">(</span><span class="identifier">X</span><span class="special">::*</span><span class="identifier">fx4</span><span class="special">)(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span>    <span class="special">=</span> <span class="special">&amp;</span><span class="identifier">X</span><span class="special">::</span><span class="identifier">f</span><span class="special">;</span>
+</pre>
+<p>
+        With these in hand, we can proceed to define and wrap this for Python:
+      </p>
+<pre class="programlisting">
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">fx1</span><span class="special">)</span>
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">fx2</span><span class="special">)</span>
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">fx3</span><span class="special">)</span>
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">fx4</span><span class="special">)</span>
+</pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.default_arguments"></a>Default Arguments</h3></div></div></div>
+<p>
+        Boost.Python wraps (member) function pointers. Unfortunately, C++ function
+        pointers carry no default argument info. Take a function <tt class="literal">f</tt>
+        with default arguments:
+      </p>
+<pre class="programlisting">
+<span class="keyword">int</span> <span class="identifier">f</span><span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span> <span class="special">=</span> <span class="number">3.14</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="special">=</span> <span class="string">"hello"</span><span class="special">);</span>
+</pre>
+<p>
+        But the type of a pointer to the function <tt class="literal">f</tt> has no information
+        about its default arguments:
+      </p>
+<pre class="programlisting">
+<span class="keyword">int</span><span class="special">(*</span><span class="identifier">g</span><span class="special">)(</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">double</span><span class="special">,</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*)</span> <span class="special">=</span> <span class="identifier">f</span><span class="special">;</span>    <span class="comment">// defaults lost!
+</span></pre>
+<p>
+        When we pass this function pointer to the <tt class="literal">def</tt> function,
+        there is no way to retrieve the default arguments:
+      </p>
+<pre class="programlisting">
+<span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span>                            <span class="comment">// defaults lost!
+</span></pre>
+<p>
+        Because of this, when wrapping C++ code, we had to resort to manual wrapping
+        as outlined in the <a href="functions.html#python.overloading" title="Overloading">previous section</a>,
+        or writing thin wrappers:
+      </p>
+<pre class="programlisting">
+<span class="comment">// write "thin wrappers"
+</span><span class="keyword">int</span> <span class="identifier">f1</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">x</span><span class="special">);</span> <span class="special">}</span>
+<span class="keyword">int</span> <span class="identifier">f2</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">x</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">y</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span><span class="identifier">y</span><span class="special">);</span> <span class="special">}</span>
+
+<span class="comment">/*...*/</span>
+
+    <span class="comment">// in module init
+</span>    <span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span>  <span class="comment">// all arguments
+</span>    <span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">f2</span><span class="special">);</span> <span class="comment">// two arguments
+</span>    <span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">f1</span><span class="special">);</span> <span class="comment">// one argument
+</span></pre>
+<p>
+        When you want to wrap functions (or member functions) that either:
+      </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+          have default arguments, or
+        </li>
+<li>
+          are overloaded with a common sequence of initial arguments
+        </li>
+</ul></div>
+<a name="default_arguments.boost_python_function_overloads"></a><h2>
+<a name="id466276"></a>
+        BOOST_PYTHON_FUNCTION_OVERLOADS
+      </h2>
+<p>
+        Boost.Python now has a way to make it easier. For instance, given a function:
+      </p>
+<pre class="programlisting">
+<span class="keyword">int</span> <span class="identifier">foo</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">char</span> <span class="identifier">b</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="identifier">c</span> <span class="special">=</span> <span class="number">2</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">d</span> <span class="special">=</span> <span class="number">3</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="comment">/*...*/</span>
+<span class="special">}</span>
+</pre>
+<p>
+        The macro invocation:
+      </p>
+<pre class="programlisting">
+<span class="identifier">BOOST_PYTHON_FUNCTION_OVERLOADS</span><span class="special">(</span><span class="identifier">foo_overloads</span><span class="special">,</span> <span class="identifier">foo</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">4</span><span class="special">)</span>
+</pre>
+<p>
+        will automatically create the thin wrappers for us. This macro will create
+        a class <tt class="literal">foo_overloads</tt> that can be passed on to <tt class="literal">def(...)</tt>.
+        The third and fourth macro argument are the minimum arguments and maximum
+        arguments, respectively. In our <tt class="literal">foo</tt> function the minimum
+        number of arguments is 1 and the maximum number of arguments is 4. The <tt class="literal">def(...)</tt>
+        function will automatically add all the foo variants for us:
+      </p>
+<pre class="programlisting">
+<span class="identifier">def</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="identifier">foo</span><span class="special">,</span> <span class="identifier">foo_overloads</span><span class="special">());</span>
+</pre>
+<a name="default_arguments.boost_python_member_function_overloads"></a><h2>
+<a name="id466595"></a>
+        BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS
+      </h2>
+<p>
+        Objects here, objects there, objects here there everywhere. More frequently
+        than anything else, we need to expose member functions of our classes to
+        Python. Then again, we have the same inconveniences as before when default
+        arguments or overloads with a common sequence of initial arguments come into
+        play. Another macro is provided to make this a breeze.
+      </p>
+<p>
+        Like <tt class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</tt>, <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt>
+        may be used to automatically create the thin wrappers for wrapping member
+        functions. Let's have an example:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">george</span>
+<span class="special">{</span>
+    <span class="keyword">void</span>
+    <span class="identifier">wack_em</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">b</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="keyword">char</span> <span class="identifier">c</span> <span class="special">=</span> <span class="char">'x'</span><span class="special">)</span>
+    <span class="special">{</span>
+        <span class="comment">/*...*/</span>
+    <span class="special">}</span>
+<span class="special">};</span>
+</pre>
+<p>
+        The macro invocation:
+      </p>
+<pre class="programlisting">
+<span class="identifier">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</span><span class="special">(</span><span class="identifier">george_overloads</span><span class="special">,</span> <span class="identifier">wack_em</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">3</span><span class="special">)</span>
+</pre>
+<p>
+        will generate a set of thin wrappers for george's <tt class="literal">wack_em</tt>
+        member function accepting a minimum of 1 and a maximum of 3 arguments (i.e.
+        the third and fourth macro argument). The thin wrappers are all enclosed
+        in a class named <tt class="literal">george_overloads</tt> that can then be used
+        as an argument to <tt class="literal">def(...)</tt>:
+      </p>
+<pre class="programlisting">
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"wack_em"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">george</span><span class="special">::</span><span class="identifier">wack_em</span><span class="special">,</span> <span class="identifier">george_overloads</span><span class="special">());</span>
+</pre>
+<p>
+        See the <a href="../../../../v2/overloads.html#BOOST_PYTHON_FUNCTION_OVERLOADS-spec" target="_top">overloads
+        reference</a> for details.
+      </p>
+<a name="default_arguments.init_and_optional"></a><h2>
+<a name="id466958"></a>
+        init and optional
+      </h2>
+<p>
+        A similar facility is provided for class constructors, again, with default
+        arguments or a sequence of overloads. Remember <tt class="literal">init&lt;...&gt;</tt>?
+        For example, given a class X with a constructor:
+      </p>
+<pre class="programlisting">
+<span class="keyword">struct</span> <span class="identifier">X</span>
+<span class="special">{</span>
+    <span class="identifier">X</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">char</span> <span class="identifier">b</span> <span class="special">=</span> <span class="char">'D'</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">c</span> <span class="special">=</span> <span class="string">"constructor"</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">d</span> <span class="special">=</span> <span class="number">0.0</span><span class="special">);</span>
+    <span class="comment">/*...*/</span>
+<span class="special">}</span>
+</pre>
+<p>
+        You can easily add this constructor to Boost.Python in one shot:
+      </p>
+<pre class="programlisting">
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">init</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">char</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span> <span class="special">&gt;())</span>
+</pre>
+<p>
+        Notice the use of <tt class="literal">init&lt;...&gt;</tt> and <tt class="literal">optional&lt;...&gt;</tt>
+        to signify the default (optional arguments).
+      </p>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.auto_overloading"></a>Auto-Overloading</h3></div></div></div>
+<p>
+        It was mentioned in passing in the previous section that <tt class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</tt>
+        and <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt> can also be
+        used for overloaded functions and member functions with a common sequence
+        of initial arguments. Here is an example:
+      </p>
+<pre class="programlisting">
+<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">()</span>
+<span class="special">{</span>
+   <span class="comment">/*...*/</span>
+<span class="special">}</span>
+
+<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">(</span><span class="keyword">bool</span> <span class="identifier">a</span><span class="special">)</span>
+<span class="special">{</span>
+   <span class="comment">/*...*/</span>
+<span class="special">}</span>
+
+<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">(</span><span class="keyword">bool</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">b</span><span class="special">)</span>
+<span class="special">{</span>
+   <span class="comment">/*...*/</span>
+<span class="special">}</span>
+
+<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">(</span><span class="keyword">bool</span> <span class="identifier">a</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">b</span><span class="special">,</span> <span class="keyword">char</span> <span class="identifier">c</span><span class="special">)</span>
+<span class="special">{</span>
+   <span class="comment">/*...*/</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Like in the previous section, we can generate thin wrappers for these overloaded
+        functions in one-shot:
+      </p>
+<pre class="programlisting">
+<span class="identifier">BOOST_PYTHON_FUNCTION_OVERLOADS</span><span class="special">(</span><span class="identifier">foo_overloads</span><span class="special">,</span> <span class="identifier">foo</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="number">3</span><span class="special">)</span>
+</pre>
+<p>
+        Then...
+      </p>
+<pre class="programlisting">
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="special">(</span><span class="keyword">void</span><span class="special">(*)(</span><span class="keyword">bool</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">))</span><span class="number">0</span><span class="special">,</span> <span class="identifier">foo_overloads</span><span class="special">());</span>
+</pre>
+<p>
+        Notice though that we have a situation now where we have a minimum of zero
+        (0) arguments and a maximum of 3 arguments.
+      </p>
+<a name="auto_overloading.manual_wrapping"></a><h2>
+<a name="id467740"></a>
+        Manual Wrapping
+      </h2>
+<p>
+        It is important to emphasize however that <span class="bold"><b>the overloaded
+        functions must have a common sequence of initial arguments</b></span>. Otherwise,
+        our scheme above will not work. If this is not the case, we have to wrap
+        our functions <a href="functions.html#python.overloading" title="Overloading">manually</a>.
+      </p>
+<p>
+        Actually, we can mix and match manual wrapping of overloaded functions and
+        automatic wrapping through <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt>
+        and its sister, <tt class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</tt>. Following
+        up on our example presented in the section <a href="functions.html#python.overloading" title="Overloading">on
+        overloading</a>, since the first 4 overload functins have a common sequence
+        of initial arguments, we can use <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt>
+        to automatically wrap the first three of the <tt class="literal">def</tt>s and
+        manually wrap just the last. Here's how we'll do this:
+      </p>
+<pre class="programlisting">
+<span class="identifier">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</span><span class="special">(</span><span class="identifier">xf_overloads</span><span class="special">,</span> <span class="identifier">f</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">4</span><span class="special">)</span>
+</pre>
+<p>
+        Create a member function pointers as above for both X::f overloads:
+      </p>
+<pre class="programlisting">
+<span class="keyword">bool</span>    <span class="special">(</span><span class="identifier">X</span><span class="special">::*</span><span class="identifier">fx1</span><span class="special">)(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">char</span><span class="special">)</span>    <span class="special">=</span> <span class="special">&amp;</span><span class="identifier">X</span><span class="special">::</span><span class="identifier">f</span><span class="special">;</span>
+<span class="keyword">int</span>     <span class="special">(</span><span class="identifier">X</span><span class="special">::*</span><span class="identifier">fx2</span><span class="special">)(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span>        <span class="special">=</span> <span class="special">&amp;</span><span class="identifier">X</span><span class="special">::</span><span class="identifier">f</span><span class="special">;</span>
+</pre>
+<p>
+        Then...
+      </p>
+<pre class="programlisting">
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">fx1</span><span class="special">,</span> <span class="identifier">xf_overloads</span><span class="special">());</span>
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">fx2</span><span class="special">)</span>
+</pre>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
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doc/tutorial/doc/html/python/hello.html

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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title> Building Hello World</title>
+<link rel="stylesheet" href="../../../../../../../doc/html/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
+<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
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+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
+<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
+<td align="center"><a href="../../../../../../../more/faq.htm">FAQ</a></td>
+<td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../index.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="exposing.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.hello"></a> Building Hello World</h2></div></div></div>
+<a name="hello.from_start_to_finish"></a><h2>
+<a name="id386189"></a>
+      From Start To Finish
+    </h2>
+<p>
+      Now the first thing you'd want to do is to build the Hello World module and
+      try it for yourself in Python. In this section, we will outline the steps necessary
+      to achieve that. We will use the build tool that comes bundled with every boost
+      distribution: <span class="bold"><b>bjam</b></span>.
+    </p>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top">
+<p>
+        <span class="bold"><b>Building without bjam</b></span>
+      </p>
+<p>
+        Besides bjam, there are of course other ways to get your module built. What's
+        written here should not be taken as "the one and only way". There
+        are of course other build tools apart from <tt class="literal">bjam</tt>.
+      </p>
+<p>
+        Take note however that the preferred build tool for Boost.Python is bjam.
+        There are so many ways to set up the build incorrectly. Experience shows
+        that 90% of the "I can't build Boost.Python" problems come from
+        people who had to use a different tool.
+      </p>
+</td></tr>
+</table></div>
+<p>
+      We will skip over the details. Our objective will be to simply create the hello
+      world module and run it in Python. For a complete reference to building Boost.Python,
+      check out: <a href="../../../../building.html" target="_top">building.html</a>. After
+      this brief <span class="emphasis"><em>bjam</em></span> tutorial, we should have built the DLLs
+      and run a python program using the extension.
+    </p>
+<p>
+      The tutorial example can be found in the directory: <tt class="literal">libs/python/example/tutorial</tt>.
+      There, you can find:
+    </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+        hello.cpp
+      </li>
+<li>
+        hello.py
+      </li>
+<li>
+        Jamroot
+      </li>
+</ul></div>
+<p>
+      The <tt class="literal">hello.cpp</tt> file is our C++ hello world example. The
+      <tt class="literal">Jamroot</tt> is a minimalist <span class="emphasis"><em>bjam</em></span> script
+      that builds the DLLs for us. Finally, <tt class="literal">hello.py</tt> is our Python
+      program that uses the extension in <tt class="literal">hello.cpp</tt>.
+    </p>
+<p>
+      Before anything else, you should have the bjam executable in your boost directory
+      or somewhere in your path such that <tt class="literal">bjam</tt> can be executed
+      in the command line. Pre-built Boost.Jam executables are available for most
+      platforms. The complete list of Bjam executables can be found <a href="http://sourceforge.net/project/showfiles.php?group_id=7586" target="_top">here</a>.
+    </p>
+<a name="hello.let_s_jam_"></a><h2>
+<a name="id386347"></a>
+      Let's Jam!
+    </h2>
+<p>
+      <span class="inlinemediaobject"><img src="../images/jam.png" alt="jam"></span>
+    </p>
+<p>
+      <a href="../../../../../example/tutorial/Jamroot" target="_top">Here</a> is our minimalist
+      Jamroot file. Simply copy the file and tweak <tt class="literal">use-project boost</tt>
+      to where your boost root directory is and your OK.
+    </p>
+<p>
+      The comments contained in the Jamrules file above should be sufficient to get
+      you going.
+    </p>
+<a name="hello.running_bjam"></a><h2>
+<a name="id386404"></a>
+      Running bjam
+    </h2>
+<p>
+      <span class="emphasis"><em>bjam</em></span> is run using your operating system's command line
+      interpreter.
+    </p>
+<div class="blockquote"><blockquote class="blockquote">
+<p>
+        </p>
+<p>
+          Start it up.
+        </p>
+<p>
+      </p>
+</blockquote></div>
+<p>
+      A file called user-config.jam in your home directory is used to configure your
+      tools. In Windows, your home directory can be found by typing:
+    </p>
+<pre class="programlisting">ECHO %HOMEDRIVE%%HOMEPATH%
+</pre>
+<p>
+      into a command prompt window. Your file should at least have the rules for
+      your compiler and your python installation. A specific example of this on Windows
+      would be:
+    </p>
+<pre class="programlisting">#  MSVC configuration
+using msvc : 8.0 ;
+
+#  Python configuration
+using python : 2.4 : C:/dev/tools<span class="emphasis"><em>Python</em></span> ;
+</pre>
+<p>
+      The first rule tells Bjam to use the MSVC 8.0 compiler and associated tools.
+      The second rule provides information on Python, its version and where it is
+      located. The above assumes that the Python installation is in <tt class="literal">C:/dev/tools/Python/</tt>.
+      If you have one fairly "standard" python installation for your platform,
+      you might not need to do this.
+    </p>
+<p>
+      Now we are ready... Be sure to <tt class="literal">cd</tt> to <tt class="literal">libs/python/example/tutorial</tt>
+      where the tutorial <tt class="literal">"hello.cpp"</tt> and the <tt class="literal">"Jamroot"</tt>
+      is situated.
+    </p>
+<p>
+      Finally:
+    </p>
+<pre class="programlisting">
+<span class="identifier">bjam</span>
+</pre>
+<p>
+      It should be building now:
+    </p>
+<pre class="programlisting">cd C:\dev\boost\libs\python\example\tutorial
+bjam
+...patience...
+...found 1101 targets...
+...updating 35 targets...
+</pre>
+<p>
+      And so on... Finally:
+    </p>
+<pre class="programlisting">Creating library <span class="emphasis"><em>path-to-boost_python.dll</em></span>
+   Creating library <span class="emphasis"><em>path-to-'''hello_ext'''.exp</em></span>
+**passed** ... hello.test
+...updated 35 targets...
+</pre>
+<p>
+      Or something similar. If all is well, you should now have built the DLLs and
+      run the Python program.
+    </p>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top"><p>
+        Starting from Boost 1.35, bjam erases the generated executables (e.g. pyd
+        file) after the test has concluded to conserve disk space. To keep bjam from
+        doing that, pass --preserve-test-targets to bjam.
+      </p></td></tr>
+</table></div>
+<div class="blockquote"><blockquote class="blockquote">
+<p>
+        </p>
+<p>
+          <span class="bold"><b>There you go... Have fun!</b></span>
+        </p>
+<p>
+      </p>
+</blockquote></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
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+</div>
+</body>
+</html>

doc/tutorial/doc/html/python/iterators.html

@@ -0,0 +1,206 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>Iterators</title>
+<link rel="stylesheet" href="../../../../../../../doc/html/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
+<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
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+<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
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+<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
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+<td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="embedding.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="exception.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.iterators"></a>Iterators</h2></div></div></div>
+<p>
+      In C++, and STL in particular, we see iterators everywhere. Python also has
+      iterators, but these are two very different beasts.
+    </p>
+<p>
+      <span class="bold"><b>C++ iterators:</b></span>
+    </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+        C++ has 5 type categories (random-access, bidirectional, forward, input,
+        output)
+      </li>
+<li>
+        There are 2 Operation categories: reposition, access
+      </li>
+<li>
+        A pair of iterators is needed to represent a (first/last) range.
+      </li>
+</ul></div>
+<p>
+      <span class="bold"><b>Python Iterators:</b></span>
+    </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+        1 category (forward)
+      </li>
+<li>
+        1 operation category (next())
+      </li>
+<li>
+        Raises StopIteration exception at end
+      </li>
+</ul></div>
+<p>
+      The typical Python iteration protocol: <tt class="literal"><span class="bold"><b>for y
+      in x...</b></span></tt> is as follows:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="identifier">iter</span> <span class="special">=</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">__iter__</span><span class="special">()</span>         <span class="comment"># get iterator
+</span><span class="keyword">try</span><span class="special">:</span>
+    <span class="keyword">while</span> <span class="number">1</span><span class="special">:</span>
+    <span class="identifier">y</span> <span class="special">=</span> <span class="identifier">iter</span><span class="special">.</span><span class="identifier">next</span><span class="special">()</span>         <span class="comment"># get each item
+</span>    <span class="special">...</span>                     <span class="comment"># process y
+</span><span class="keyword">except</span> <span class="identifier">StopIteration</span><span class="special">:</span> <span class="keyword">pass</span>  <span class="comment"># iterator exhausted
+</span></pre>
+<p>
+      Boost.Python provides some mechanisms to make C++ iterators play along nicely
+      as Python iterators. What we need to do is to produce appropriate <tt class="computeroutput"><span class="identifier">__iter__</span></tt> function from C++ iterators that
+      is compatible with the Python iteration protocol. For example:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">get_iterator</span> <span class="special">=</span> <span class="identifier">iterator</span><span class="special">&lt;</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;();</span>
+<span class="identifier">object</span> <span class="identifier">iter</span> <span class="special">=</span> <span class="identifier">get_iterator</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>
+<span class="identifier">object</span> <span class="identifier">first</span> <span class="special">=</span> <span class="identifier">iter</span><span class="special">.</span><span class="identifier">next</span><span class="special">();</span>
+</pre>
+<p>
+      Or for use in class_&lt;&gt;:
+    </p>
+<pre class="programlisting">
+<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"__iter__"</span><span class="special">,</span> <span class="identifier">iterator</span><span class="special">&lt;</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;())</span>
+</pre>
+<p>
+      <span class="bold"><b>range</b></span>
+    </p>
+<p>
+      We can create a Python savvy iterator using the range function:
+    </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+        range(start, finish)
+      </li>
+<li>
+        range&lt;Policies,Target&gt;(start, finish)
+      </li>
+</ul></div>
+<p>
+      Here, start/finish may be one of:
+    </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+        member data pointers
+      </li>
+<li>
+        member function pointers
+      </li>
+<li>
+        adaptable function object (use Target parameter)
+      </li>
+</ul></div>
+<p>
+      <span class="bold"><b>iterator</b></span>
+    </p>
+<div class="itemizedlist"><ul type="disc"><li>
+        iterator&lt;T, Policies&gt;()
+      </li></ul></div>
+<p>
+      Given a container <tt class="literal">T</tt>, iterator is a shortcut that simply
+      calls <tt class="literal">range</tt> with &amp;T::begin, &amp;T::end.
+    </p>
+<p>
+      Let's put this into action... Here's an example from some hypothetical bogon
+      Particle accelerator code:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="identifier">f</span> <span class="special">=</span> <span class="identifier">Field</span><span class="special">()</span>
+<span class="keyword">for</span> <span class="identifier">x</span> <span class="keyword">in</span> <span class="identifier">f</span><span class="special">.</span><span class="identifier">pions</span><span class="special">:</span>
+    <span class="identifier">smash</span><span class="special">(</span><span class="identifier">x</span><span class="special">)</span>
+<span class="keyword">for</span> <span class="identifier">y</span> <span class="keyword">in</span> <span class="identifier">f</span><span class="special">.</span><span class="identifier">bogons</span><span class="special">:</span>
+    <span class="identifier">count</span><span class="special">(</span><span class="identifier">y</span><span class="special">)</span>
+</pre>
+<p>
+      Now, our C++ Wrapper:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">F</span><span class="special">&gt;(</span><span class="string">"Field"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">property</span><span class="special">(</span><span class="string">"pions"</span><span class="special">,</span> <span class="identifier">range</span><span class="special">(&amp;</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">p_begin</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">p_end</span><span class="special">))</span>
+    <span class="special">.</span><span class="identifier">property</span><span class="special">(</span><span class="string">"bogons"</span><span class="special">,</span> <span class="identifier">range</span><span class="special">(&amp;</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">b_begin</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">b_end</span><span class="special">));</span>
+</pre>
+<p>
+      <span class="bold"><b>stl_input_iterator</b></span>
+    </p>
+<p>
+      So far, we have seen how to expose C++ iterators and ranges to Python. Sometimes
+      we wish to go the other way, though: we'd like to pass a Python sequence to
+      an STL algorithm or use it to initialize an STL container. We need to make
+      a Python iterator look like an STL iterator. For that, we use <tt class="computeroutput"><span class="identifier">stl_input_iterator</span><span class="special">&lt;&gt;</span></tt>.
+      Consider how we might implement a function that exposes <tt class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">list</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">assign</span><span class="special">()</span></tt> to Python:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
+<span class="keyword">void</span> <span class="identifier">list_assign</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">list</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;&amp;</span> <span class="identifier">l</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">o</span><span class="special">)</span> <span class="special">{</span>
+    <span class="comment">// Turn a Python sequence into an STL input range
+</span>    <span class="identifier">stl_input_iterator</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span> <span class="identifier">begin</span><span class="special">(</span><span class="identifier">o</span><span class="special">),</span> <span class="identifier">end</span><span class="special">;</span>
+    <span class="identifier">l</span><span class="special">.</span><span class="identifier">assign</span><span class="special">(</span><span class="identifier">begin</span><span class="special">,</span> <span class="identifier">end</span><span class="special">);</span>
+<span class="special">}</span>
+
+<span class="comment">// Part of the wrapper for list&lt;int&gt;
+</span><span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">list</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;(</span><span class="string">"list_int"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"assign"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">list_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;)</span>
+    <span class="comment">// ...
+</span>    <span class="special">;</span>
+</pre>
+<p>
+      Now in Python, we can assign any integer sequence to <tt class="computeroutput"><span class="identifier">list_int</span></tt>
+      objects:
+    </p>
+<p>
+    </p>
+<pre class="programlisting">
+<span class="identifier">x</span> <span class="special">=</span> <span class="identifier">list_int</span><span class="special">();</span>
+<span class="identifier">x</span><span class="special">.</span><span class="identifier">assign</span><span class="special">([</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">,</span><span class="number">3</span><span class="special">,</span><span class="number">4</span><span class="special">,</span><span class="number">5</span><span class="special">])</span>
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
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+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.object"></a> Object Interface</h2></div></div></div>
+<div class="toc"><dl>
+<dt><span class="section"><a href="object.html#python.basic_interface">Basic Interface</a></span></dt>
+<dt><span class="section"><a href="object.html#python.derived_object_types">Derived Object types</a></span></dt>
+<dt><span class="section"><a href="object.html#python.extracting_c___objects">Extracting C++ objects</a></span></dt>
+<dt><span class="section"><a href="object.html#python.enums">Enums</a></span></dt>
+</dl></div>
+<p>
+      Python is dynamically typed, unlike C++ which is statically typed. Python variables
+      may hold an integer, a float, list, dict, tuple, str, long etc., among other
+      things. In the viewpoint of Boost.Python and C++, these Pythonic variables
+      are just instances of class <tt class="literal">object</tt>. We will see in this
+      chapter how to deal with Python objects.
+    </p>
+<p>
+      As mentioned, one of the goals of Boost.Python is to provide a bidirectional
+      mapping between C++ and Python while maintaining the Python feel. Boost.Python
+      C++ <tt class="literal">object</tt>s are as close as possible to Python. This should
+      minimize the learning curve significantly.
+    </p>
+<p>
+      <span class="inlinemediaobject"><img src="../images/python.png" alt="python"></span>
+    </p>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.basic_interface"></a>Basic Interface</h3></div></div></div>
+<p>
+        Class <tt class="literal">object</tt> wraps <tt class="literal">PyObject*</tt>. All the
+        intricacies of dealing with <tt class="literal">PyObject</tt>s such as managing
+        reference counting are handled by the <tt class="literal">object</tt> class. C++
+        object interoperability is seamless. Boost.Python C++ <tt class="literal">object</tt>s
+        can in fact be explicitly constructed from any C++ object.
+      </p>
+<p>
+        To illustrate, this Python code snippet:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="keyword">def</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span> <span class="identifier">y</span><span class="special">):</span>
+     <span class="keyword">if</span> <span class="special">(</span><span class="identifier">y</span> <span class="special">==</span> <span class="string">'foo'</span><span class="special">):</span>
+         <span class="identifier">x</span><span class="special">[</span><span class="number">3</span><span class="special">:</span><span class="number">7</span><span class="special">]</span> <span class="special">=</span> <span class="string">'bar'</span>
+     <span class="keyword">else</span><span class="special">:</span>
+         <span class="identifier">x</span><span class="special">.</span><span class="identifier">items</span> <span class="special">+=</span> <span class="identifier">y</span><span class="special">(</span><span class="number">3</span><span class="special">,</span> <span class="identifier">x</span><span class="special">)</span>
+     <span class="keyword">return</span> <span class="identifier">x</span>
+
+<span class="keyword">def</span> <span class="identifier">getfunc</span><span class="special">():</span>
+   <span class="keyword">return</span> <span class="identifier">f</span><span class="special">;</span>
+</pre>
+<p>
+        Can be rewritten in C++ using Boost.Python facilities this way:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">object</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">y</span><span class="special">)</span> <span class="special">{</span>
+     <span class="keyword">if</span> <span class="special">(</span><span class="identifier">y</span> <span class="special">==</span> <span class="string">"foo"</span><span class="special">)</span>
+         <span class="identifier">x</span><span class="special">.</span><span class="identifier">slice</span><span class="special">(</span><span class="number">3</span><span class="special">,</span><span class="number">7</span><span class="special">)</span> <span class="special">=</span> <span class="string">"bar"</span><span class="special">;</span>
+     <span class="keyword">else</span>
+         <span class="identifier">x</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"items"</span><span class="special">)</span> <span class="special">+=</span> <span class="identifier">y</span><span class="special">(</span><span class="number">3</span><span class="special">,</span> <span class="identifier">x</span><span class="special">);</span>
+     <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span>
+<span class="special">}</span>
+<span class="identifier">object</span> <span class="identifier">getfunc</span><span class="special">()</span> <span class="special">{</span>
+    <span class="keyword">return</span> <span class="identifier">object</span><span class="special">(</span><span class="identifier">f</span><span class="special">);</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Apart from cosmetic differences due to the fact that we are writing the code
+        in C++, the look and feel should be immediately apparent to the Python coder.
+      </p>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.derived_object_types"></a>Derived Object types</h3></div></div></div>
+<p>
+        Boost.Python comes with a set of derived <tt class="literal">object</tt> types
+        corresponding to that of Python's:
+      </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+          list
+        </li>
+<li>
+          dict
+        </li>
+<li>
+          tuple
+        </li>
+<li>
+          str
+        </li>
+<li>
+          long_
+        </li>
+<li>
+          enum
+        </li>
+</ul></div>
+<p>
+        These derived <tt class="literal">object</tt> types act like real Python types.
+        For instance:
+      </p>
+<pre class="programlisting">
+<span class="identifier">str</span><span class="special">(</span><span class="number">1</span><span class="special">)</span> <span class="special">==&gt;</span> <span class="string">"1"</span>
+</pre>
+<p>
+        Wherever appropriate, a particular derived <tt class="literal">object</tt> has
+        corresponding Python type's methods. For instance, <tt class="literal">dict</tt>
+        has a <tt class="literal">keys()</tt> method:
+      </p>
+<pre class="programlisting">
+<span class="identifier">d</span><span class="special">.</span><span class="identifier">keys</span><span class="special">()</span>
+</pre>
+<p>
+        <tt class="literal">make_tuple</tt> is provided for declaring <span class="emphasis"><em>tuple literals</em></span>.
+        Example:
+      </p>
+<pre class="programlisting">
+<span class="identifier">make_tuple</span><span class="special">(</span><span class="number">123</span><span class="special">,</span> <span class="char">'D'</span><span class="special">,</span> <span class="string">"Hello, World"</span><span class="special">,</span> <span class="number">0.0</span><span class="special">);</span>
+</pre>
+<p>
+        In C++, when Boost.Python <tt class="literal">object</tt>s are used as arguments
+        to functions, subtype matching is required. For example, when a function
+        <tt class="literal">f</tt>, as declared below, is wrapped, it will only accept
+        instances of Python's <tt class="literal">str</tt> type and subtypes.
+      </p>
+<pre class="programlisting">
+<span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">name</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">object</span> <span class="identifier">n2</span> <span class="special">=</span> <span class="identifier">name</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"upper"</span><span class="special">)();</span>   <span class="comment">// NAME = name.upper()
+</span>    <span class="identifier">str</span> <span class="identifier">NAME</span> <span class="special">=</span> <span class="identifier">name</span><span class="special">.</span><span class="identifier">upper</span><span class="special">();</span>            <span class="comment">// better
+</span>    <span class="identifier">object</span> <span class="identifier">msg</span> <span class="special">=</span> <span class="string">"%s is bigger than %s"</span> <span class="special">%</span> <span class="identifier">make_tuple</span><span class="special">(</span><span class="identifier">NAME</span><span class="special">,</span><span class="identifier">name</span><span class="special">);</span>
+<span class="special">}</span>
+</pre>
+<p>
+        In finer detail:
+      </p>
+<pre class="programlisting">
+<span class="identifier">str</span> <span class="identifier">NAME</span> <span class="special">=</span> <span class="identifier">name</span><span class="special">.</span><span class="identifier">upper</span><span class="special">();</span>
+</pre>
+<p>
+        Illustrates that we provide versions of the str type's methods as C++ member
+        functions.
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">msg</span> <span class="special">=</span> <span class="string">"%s is bigger than %s"</span> <span class="special">%</span> <span class="identifier">make_tuple</span><span class="special">(</span><span class="identifier">NAME</span><span class="special">,</span><span class="identifier">name</span><span class="special">);</span>
+</pre>
+<p>
+        Demonstrates that you can write the C++ equivalent of <tt class="literal">"format"
+        % x,y,z</tt> in Python, which is useful since there's no easy way to
+        do that in std C++.
+      </p>
+<div class="sidebar"><p>
+        <span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><b>Beware</b></span> the common pitfall
+        of forgetting that the constructors of most of Python's mutable types make
+        copies, just as in Python.
+      </p></div>
+<p>
+        Python:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">d</span> <span class="special">=</span> <span class="identifier">dict</span><span class="special">(</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">__dict__</span><span class="special">)</span>     <span class="comment"># copies x.__dict__
+</span><span class="special">&gt;&gt;&gt;</span> <span class="identifier">d</span><span class="special">[</span><span class="string">'whatever'</span><span class="special">]</span> <span class="special">=</span> <span class="number">3</span>        <span class="comment"># modifies the copy
+</span></pre>
+<p>
+        C++:
+      </p>
+<pre class="programlisting">
+<span class="identifier">dict</span> <span class="identifier">d</span><span class="special">(</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">));</span>  <span class="comment">// copies x.__dict__
+</span><span class="identifier">d</span><span class="special">[</span><span class="char">'whatever'</span><span class="special">]</span> <span class="special">=</span> <span class="number">3</span><span class="special">;</span>           <span class="comment">// modifies the copy
+</span></pre>
+<a name="derived_object_types.class__lt_t_gt__as_objects"></a><h2>
+<a name="id469745"></a>
+        class_&lt;T&gt; as objects
+      </h2>
+<p>
+        Due to the dynamic nature of Boost.Python objects, any <tt class="literal">class_&lt;T&gt;</tt>
+        may also be one of these types! The following code snippet wraps the class
+        (type) object.
+      </p>
+<p>
+        We can use this to create wrapped instances. Example:
+      </p>
+<pre class="programlisting">
+<span class="identifier">object</span> <span class="identifier">vec345</span> <span class="special">=</span> <span class="special">(</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">Vec2</span><span class="special">&gt;(</span><span class="string">"Vec2"</span><span class="special">,</span> <span class="identifier">init</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;())</span>
+        <span class="special">.</span><span class="identifier">def_readonly</span><span class="special">(</span><span class="string">"length"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Point</span><span class="special">::</span><span class="identifier">length</span><span class="special">)</span>
+        <span class="special">.</span><span class="identifier">def_readonly</span><span class="special">(</span><span class="string">"angle"</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">Point</span><span class="special">::</span><span class="identifier">angle</span><span class="special">)</span>
+    <span class="special">)(</span><span class="number">3.0</span><span class="special">,</span> <span class="number">4.0</span><span class="special">);</span>
+
+<span class="identifier">assert</span><span class="special">(</span><span class="identifier">vec345</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"length"</span><span class="special">)</span> <span class="special">==</span> <span class="number">5.0</span><span class="special">);</span>
+</pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.extracting_c___objects"></a>Extracting C++ objects</h3></div></div></div>
+<p>
+        At some point, we will need to get C++ values out of object instances. This
+        can be achieved with the <tt class="literal">extract&lt;T&gt;</tt> function. Consider
+        the following:
+      </p>
+<pre class="programlisting">
+<span class="keyword">double</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">o</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"length"</span><span class="special">);</span> <span class="comment">// compile error
+</span></pre>
+<p>
+        In the code above, we got a compiler error because Boost.Python <tt class="literal">object</tt>
+        can't be implicitly converted to <tt class="literal">double</tt>s. Instead, what
+        we wanted to do above can be achieved by writing:
+      </p>
+<pre class="programlisting">
+<span class="keyword">double</span> <span class="identifier">l</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;(</span><span class="identifier">o</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"length"</span><span class="special">));</span>
+<span class="identifier">Vec2</span><span class="special">&amp;</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special">&lt;</span><span class="identifier">Vec2</span><span class="special">&amp;&gt;(</span><span class="identifier">o</span><span class="special">);</span>
+<span class="identifier">assert</span><span class="special">(</span><span class="identifier">l</span> <span class="special">==</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">length</span><span class="special">());</span>
+</pre>
+<p>
+        The first line attempts to extract the "length" attribute of the
+        Boost.Python <tt class="literal">object</tt>. The second line attempts to <span class="emphasis"><em>extract</em></span>
+        the <tt class="literal">Vec2</tt> object from held by the Boost.Python <tt class="literal">object</tt>.
+      </p>
+<p>
+        Take note that we said "attempt to" above. What if the Boost.Python
+        <tt class="literal">object</tt> does not really hold a <tt class="literal">Vec2</tt>
+        type? This is certainly a possibility considering the dynamic nature of Python
+        <tt class="literal">object</tt>s. To be on the safe side, if the C++ type can't
+        be extracted, an appropriate exception is thrown. To avoid an exception,
+        we need to test for extractibility:
+      </p>
+<pre class="programlisting">
+<span class="identifier">extract</span><span class="special">&lt;</span><span class="identifier">Vec2</span><span class="special">&amp;&gt;</span> <span class="identifier">x</span><span class="special">(</span><span class="identifier">o</span><span class="special">);</span>
+<span class="keyword">if</span> <span class="special">(</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">check</span><span class="special">())</span> <span class="special">{</span>
+    <span class="identifier">Vec2</span><span class="special">&amp;</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">x</span><span class="special">();</span> <span class="special">...</span>
+</pre>
+<p>
+        <span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span> The astute reader might have noticed that the <tt class="literal">extract&lt;T&gt;</tt>
+        facility in fact solves the mutable copying problem:
+      </p>
+<pre class="programlisting">
+<span class="identifier">dict</span> <span class="identifier">d</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special">&lt;</span><span class="identifier">dict</span><span class="special">&gt;(</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">));</span>
+<span class="identifier">d</span><span class="special">[</span><span class="string">"whatever"</span><span class="special">]</span> <span class="special">=</span> <span class="number">3</span><span class="special">;</span>          <span class="comment">// modifies x.__dict__ !
+</span></pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.enums"></a>Enums</h3></div></div></div>
+<p>
+        Boost.Python has a nifty facility to capture and wrap C++ enums. While Python
+        has no <tt class="literal">enum</tt> type, we'll often want to expose our C++ enums
+        to Python as an <tt class="literal">int</tt>. Boost.Python's enum facility makes
+        this easy while taking care of the proper conversions from Python's dynamic
+        typing to C++'s strong static typing (in C++, ints cannot be implicitly converted
+        to enums). To illustrate, given a C++ enum:
+      </p>
+<pre class="programlisting">
+<span class="keyword">enum</span> <span class="identifier">choice</span> <span class="special">{</span> <span class="identifier">red</span><span class="special">,</span> <span class="identifier">blue</span> <span class="special">};</span>
+</pre>
+<p>
+        the construct:
+      </p>
+<pre class="programlisting">
+<span class="identifier">enum_</span><span class="special">&lt;</span><span class="identifier">choice</span><span class="special">&gt;(</span><span class="string">"choice"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="string">"red"</span><span class="special">,</span> <span class="identifier">red</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="string">"blue"</span><span class="special">,</span> <span class="identifier">blue</span><span class="special">)</span>
+    <span class="special">;</span>
+</pre>
+<p>
+        can be used to expose to Python. The new enum type is created in the current
+        <tt class="literal">scope()</tt>, which is usually the current module. The snippet
+        above creates a Python class derived from Python's <tt class="literal">int</tt>
+        type which is associated with the C++ type passed as its first parameter.
+      </p>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top">
+<p>
+          <span class="bold"><b>what is a scope?</b></span>
+        </p>
+<p>
+          The scope is a class that has an associated global Python object which
+          controls the Python namespace in which new extension classes and wrapped
+          functions will be defined as attributes. Details can be found <a href="../../../../v2/scope.html" target="_top">here</a>.
+        </p>
+</td></tr>
+</table></div>
+<p>
+        You can access those values in Python as
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">my_module</span><span class="special">.</span><span class="identifier">choice</span><span class="special">.</span><span class="identifier">red</span>
+<span class="identifier">my_module</span><span class="special">.</span><span class="identifier">choice</span><span class="special">.</span><span class="identifier">red</span>
+</pre>
+<p>
+        where my_module is the module where the enum is declared. You can also create
+        a new scope around a class:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="identifier">scope</span> <span class="identifier">in_X</span> <span class="special">=</span> <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">X</span><span class="special">&gt;(</span><span class="string">"X"</span><span class="special">)</span>
+                <span class="special">.</span><span class="identifier">def</span><span class="special">(</span> <span class="special">...</span> <span class="special">)</span>
+                <span class="special">.</span><span class="identifier">def</span><span class="special">(</span> <span class="special">...</span> <span class="special">)</span>
+            <span class="special">;</span>
+
+<span class="comment">// Expose X::nested as X.nested
+</span><span class="identifier">enum_</span><span class="special">&lt;</span><span class="identifier">X</span><span class="special">::</span><span class="identifier">nested</span><span class="special">&gt;(</span><span class="string">"nested"</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="string">"red"</span><span class="special">,</span> <span class="identifier">red</span><span class="special">)</span>
+    <span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="string">"blue"</span><span class="special">,</span> <span class="identifier">blue</span><span class="special">)</span>
+    <span class="special">;</span>
+</pre>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="functions.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="embedding.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
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+<title> General Techniques</title>
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+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="python.techniques"></a> General Techniques</h2></div></div></div>
+<div class="toc"><dl>
+<dt><span class="section"><a href="techniques.html#python.creating_packages">Creating Packages</a></span></dt>
+<dt><span class="section"><a href="techniques.html#python.extending_wrapped_objects_in_python">Extending Wrapped Objects in Python</a></span></dt>
+<dt><span class="section"><a href="techniques.html#python.reducing_compiling_time">Reducing Compiling Time</a></span></dt>
+</dl></div>
+<p>
+      Here are presented some useful techniques that you can use while wrapping code
+      with Boost.Python.
+    </p>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.creating_packages"></a>Creating Packages</h3></div></div></div>
+<p>
+        A Python package is a collection of modules that provide to the user a certain
+        functionality. If you're not familiar on how to create packages, a good introduction
+        to them is provided in the <a href="http://www.python.org/doc/current/tut/node8.html" target="_top">Python
+        Tutorial</a>.
+      </p>
+<p>
+        But we are wrapping C++ code, using Boost.Python. How can we provide a nice
+        package interface to our users? To better explain some concepts, let's work
+        with an example.
+      </p>
+<p>
+        We have a C++ library that works with sounds: reading and writing various
+        formats, applying filters to the sound data, etc. It is named (conveniently)
+        <tt class="literal">sounds</tt>. Our library already has a neat C++ namespace hierarchy,
+        like so:
+      </p>
+<pre class="programlisting">
+<span class="identifier">sounds</span><span class="special">::</span><span class="identifier">core</span>
+<span class="identifier">sounds</span><span class="special">::</span><span class="identifier">io</span>
+<span class="identifier">sounds</span><span class="special">::</span><span class="identifier">filters</span>
+</pre>
+<p>
+        We would like to present this same hierarchy to the Python user, allowing
+        him to write code like this:
+      </p>
+<pre class="programlisting">
+<span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span>
+<span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span><span class="special">.</span><span class="identifier">echo</span><span class="special">(...)</span> <span class="comment"># echo is a C++ function
+</span></pre>
+<p>
+        The first step is to write the wrapping code. We have to export each module
+        separately with Boost.Python, like this:
+      </p>
+<pre class="programlisting">
+<span class="special">/*</span> <span class="identifier">file</span> <span class="identifier">core</span><span class="special">.</span><span class="identifier">cpp</span> <span class="special">*/</span>
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">core</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="special">/*</span> <span class="identifier">export</span> <span class="identifier">everything</span> <span class="keyword">in</span> <span class="identifier">the</span> <span class="identifier">sounds</span><span class="special">::</span><span class="identifier">core</span> <span class="identifier">namespace</span> <span class="special">*/</span>
+    <span class="special">...</span>
+<span class="special">}</span>
+
+<span class="special">/*</span> <span class="identifier">file</span> <span class="identifier">io</span><span class="special">.</span><span class="identifier">cpp</span> <span class="special">*/</span>
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">io</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="special">/*</span> <span class="identifier">export</span> <span class="identifier">everything</span> <span class="keyword">in</span> <span class="identifier">the</span> <span class="identifier">sounds</span><span class="special">::</span><span class="identifier">io</span> <span class="identifier">namespace</span> <span class="special">*/</span>
+    <span class="special">...</span>
+<span class="special">}</span>
+
+<span class="special">/*</span> <span class="identifier">file</span> <span class="identifier">filters</span><span class="special">.</span><span class="identifier">cpp</span> <span class="special">*/</span>
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">filters</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="special">/*</span> <span class="identifier">export</span> <span class="identifier">everything</span> <span class="keyword">in</span> <span class="identifier">the</span> <span class="identifier">sounds</span><span class="special">::</span><span class="identifier">filters</span> <span class="identifier">namespace</span> <span class="special">*/</span>
+    <span class="special">...</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Compiling these files will generate the following Python extensions: <tt class="literal">core.pyd</tt>,
+        <tt class="literal">io.pyd</tt> and <tt class="literal">filters.pyd</tt>.
+      </p>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top"><p>
+          The extension <tt class="literal">.pyd</tt> is used for python extension modules,
+          which are just shared libraries. Using the default for your system, like
+          <tt class="literal">.so</tt> for Unix and <tt class="literal">.dll</tt> for Windows,
+          works just as well.
+        </p></td></tr>
+</table></div>
+<p>
+        Now, we create this directory structure for our Python package:
+      </p>
+<pre class="programlisting">sounds/
+    __init__.py
+    core.pyd
+    filters.pyd
+    io.pyd
+</pre>
+<p>
+        The file <tt class="literal">__init__.py</tt> is what tells Python that the directory
+        <tt class="literal">sounds/</tt> is actually a Python package. It can be a empty
+        file, but can also perform some magic, that will be shown later.
+      </p>
+<p>
+        Now our package is ready. All the user has to do is put <tt class="literal">sounds</tt>
+        into his <a href="http://www.python.org/doc/current/tut/node8.html#SECTION008110000000000000000" target="_top">PYTHONPATH</a>
+        and fire up the interpreter:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">io</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">sound</span> <span class="special">=</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">io</span><span class="special">.</span><span class="identifier">open</span><span class="special">(</span><span class="string">'file.mp3'</span><span class="special">)</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">new_sound</span> <span class="special">=</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span><span class="special">.</span><span class="identifier">echo</span><span class="special">(</span><span class="identifier">sound</span><span class="special">,</span> <span class="number">1.0</span><span class="special">)</span>
+</pre>
+<p>
+        Nice heh?
+      </p>
+<p>
+        This is the simplest way to create hierarchies of packages, but it is not
+        very flexible. What if we want to add a <span class="emphasis"><em>pure</em></span> Python
+        function to the filters package, for instance, one that applies 3 filters
+        in a sound object at once? Sure, you can do this in C++ and export it, but
+        why not do so in Python? You don't have to recompile the extension modules,
+        plus it will be easier to write it.
+      </p>
+<p>
+        If we want this flexibility, we will have to complicate our package hierarchy
+        a little. First, we will have to change the name of the extension modules:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="comment">/* file core.cpp */</span>
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">_core</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="special">...</span>
+    <span class="comment">/* export everything in the sounds::core namespace */</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Note that we added an underscore to the module name. The filename will have
+        to be changed to <tt class="literal">_core.pyd</tt> as well, and we do the same
+        to the other extension modules. Now, we change our package hierarchy like
+        so:
+      </p>
+<pre class="programlisting">sounds/
+    __init__.py
+    core/
+        __init__.py
+        <span class="underline">core.pyd
+    filters/
+        \</span>_init__.py
+        <span class="underline">filters.pyd
+    io/
+        \</span>_init__.py
+        _io.pyd
+</pre>
+<p>
+        Note that we created a directory for each extension module, and added a __init__.py
+        to each one. But if we leave it that way, the user will have to access the
+        functions in the core module with this syntax:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">core</span><span class="special">.</span><span class="identifier">_core</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">core</span><span class="special">.</span><span class="identifier">_core</span><span class="special">.</span><span class="identifier">foo</span><span class="special">(...)</span>
+</pre>
+<p>
+        which is not what we want. But here enters the <tt class="literal">__init__.py</tt>
+        magic: everything that is brought to the <tt class="literal">__init__.py</tt> namespace
+        can be accessed directly by the user. So, all we have to do is bring the
+        entire namespace from <tt class="literal">_core.pyd</tt> to <tt class="literal">core/__init__.py</tt>.
+        So add this line of code to <tt class="literal">sounds<span class="emphasis"><em>core</em></span>__init__.py</tt>:
+      </p>
+<pre class="programlisting">
+<span class="keyword">from</span> <span class="identifier">_core</span> <span class="keyword">import</span> <span class="special">*</span>
+</pre>
+<p>
+        We do the same for the other packages. Now the user accesses the functions
+        and classes in the extension modules like before:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span><span class="special">.</span><span class="identifier">echo</span><span class="special">(...)</span>
+</pre>
+<p>
+        with the additional benefit that we can easily add pure Python functions
+        to any module, in a way that the user can't tell the difference between a
+        C++ function and a Python function. Let's add a <span class="emphasis"><em>pure</em></span>
+        Python function, <tt class="literal">echo_noise</tt>, to the <tt class="literal">filters</tt>
+        package. This function applies both the <tt class="literal">echo</tt> and <tt class="literal">noise</tt>
+        filters in sequence in the given <tt class="literal">sound</tt> object. We create
+        a file named <tt class="literal">sounds/filters/echo_noise.py</tt> and code our
+        function:
+      </p>
+<pre class="programlisting">
+<span class="keyword">import</span> <span class="identifier">_filters</span>
+<span class="keyword">def</span> <span class="identifier">echo_noise</span><span class="special">(</span><span class="identifier">sound</span><span class="special">):</span>
+    <span class="identifier">s</span> <span class="special">=</span> <span class="identifier">_filters</span><span class="special">.</span><span class="identifier">echo</span><span class="special">(</span><span class="identifier">sound</span><span class="special">)</span>
+    <span class="identifier">s</span> <span class="special">=</span> <span class="identifier">_filters</span><span class="special">.</span><span class="identifier">noise</span><span class="special">(</span><span class="identifier">sound</span><span class="special">)</span>
+    <span class="keyword">return</span> <span class="identifier">s</span>
+</pre>
+<p>
+        Next, we add this line to <tt class="literal">sounds<span class="emphasis"><em>filters</em></span>__init__.py</tt>:
+      </p>
+<pre class="programlisting">
+<span class="keyword">from</span> <span class="identifier">echo_noise</span> <span class="keyword">import</span> <span class="identifier">echo_noise</span>
+</pre>
+<p>
+        And that's it. The user now accesses this function like any other function
+        from the <tt class="literal">filters</tt> package:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span><span class="special">.</span><span class="identifier">echo_noise</span><span class="special">(...)</span>
+</pre>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.extending_wrapped_objects_in_python"></a>Extending Wrapped Objects in Python</h3></div></div></div>
+<p>
+        Thanks to Python's flexibility, you can easily add new methods to a class,
+        even after it was already created:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">class</span> <span class="identifier">C</span><span class="special">(</span><span class="identifier">object</span><span class="special">):</span> <span class="keyword">pass</span>
+<span class="special">&gt;&gt;&gt;</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="comment"># a regular function
+</span><span class="special">&gt;&gt;&gt;</span> <span class="keyword">def</span> <span class="identifier">C_str</span><span class="special">(</span><span class="identifier">self</span><span class="special">):</span> <span class="keyword">return</span> <span class="string">'A C instance!'</span>
+<span class="special">&gt;&gt;&gt;</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="comment"># now we turn it in a member function
+</span><span class="special">&gt;&gt;&gt;</span> <span class="identifier">C</span><span class="special">.</span><span class="identifier">__str__</span> <span class="special">=</span> <span class="identifier">C_str</span>
+<span class="special">&gt;&gt;&gt;</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">c</span> <span class="special">=</span> <span class="identifier">C</span><span class="special">()</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">print</span> <span class="identifier">c</span>
+<span class="identifier">A</span> <span class="identifier">C</span> <span class="identifier">instance</span><span class="special">!</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">C_str</span><span class="special">(</span><span class="identifier">c</span><span class="special">)</span>
+<span class="identifier">A</span> <span class="identifier">C</span> <span class="identifier">instance</span><span class="special">!</span>
+</pre>
+<p>
+        Yes, Python rox. <span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span>
+      </p>
+<p>
+        We can do the same with classes that were wrapped with Boost.Python. Suppose
+        we have a class <tt class="literal">point</tt> in C++:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="keyword">class</span> <span class="identifier">point</span> <span class="special">{...};</span>
+
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">_geom</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;(</span><span class="string">"point"</span><span class="special">)...;</span>
+<span class="special">}</span>
+</pre>
+<p>
+        If we are using the technique from the previous session, <a href="techniques.html#python.creating_packages" title="Creating Packages">Creating
+        Packages</a>, we can code directly into <tt class="literal">geom/__init__.py</tt>:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="keyword">from</span> <span class="identifier">_geom</span> <span class="keyword">import</span> <span class="special">*</span>
+
+<span class="comment"># a regular function
+</span><span class="keyword">def</span> <span class="identifier">point_str</span><span class="special">(</span><span class="identifier">self</span><span class="special">):</span>
+    <span class="keyword">return</span> <span class="identifier">str</span><span class="special">((</span><span class="identifier">self</span><span class="special">.</span><span class="identifier">x</span><span class="special">,</span> <span class="identifier">self</span><span class="special">.</span><span class="identifier">y</span><span class="special">))</span>
+
+<span class="comment"># now we turn it into a member function
+</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">__str__</span> <span class="special">=</span> <span class="identifier">point_str</span>
+</pre>
+<p>
+        <span class="bold"><b>All</b></span> point instances created from C++ will
+        also have this member function! This technique has several advantages:
+      </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+          Cut down compile times to zero for these additional functions
+        </li>
+<li>
+          Reduce the memory footprint to virtually zero
+        </li>
+<li>
+          Minimize the need to recompile
+        </li>
+<li>
+          Rapid prototyping (you can move the code to C++ if required without changing
+          the interface)
+        </li>
+</ul></div>
+<p>
+        You can even add a little syntactic sugar with the use of metaclasses. Let's
+        create a special metaclass that "injects" methods in other classes.
+      </p>
+<pre class="programlisting">
+<span class="comment"># The one Boost.Python uses for all wrapped classes.
+</span><span class="comment"># You can use here any class exported by Boost instead of "point"
+</span><span class="identifier">BoostPythonMetaclass</span> <span class="special">=</span> <span class="identifier">point</span><span class="special">.</span><span class="identifier">__class__</span>
+
+<span class="keyword">class</span> <span class="identifier">injector</span><span class="special">(</span><span class="identifier">object</span><span class="special">):</span>
+    <span class="keyword">class</span> <span class="identifier">__metaclass__</span><span class="special">(</span><span class="identifier">BoostPythonMetaclass</span><span class="special">):</span>
+        <span class="keyword">def</span> <span class="identifier">__init__</span><span class="special">(</span><span class="identifier">self</span><span class="special">,</span> <span class="identifier">name</span><span class="special">,</span> <span class="identifier">bases</span><span class="special">,</span> <span class="identifier">dict</span><span class="special">):</span>
+            <span class="keyword">for</span> <span class="identifier">b</span> <span class="keyword">in</span> <span class="identifier">bases</span><span class="special">:</span>
+                <span class="keyword">if</span> <span class="identifier">type</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span> <span class="keyword">not</span> <span class="keyword">in</span> <span class="special">(</span><span class="identifier">self</span><span class="special">,</span> <span class="identifier">type</span><span class="special">):</span>
+                    <span class="keyword">for</span> <span class="identifier">k</span><span class="special">,</span><span class="identifier">v</span> <span class="keyword">in</span> <span class="identifier">dict</span><span class="special">.</span><span class="identifier">items</span><span class="special">():</span>
+                        <span class="identifier">setattr</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span><span class="identifier">k</span><span class="special">,</span><span class="identifier">v</span><span class="special">)</span>
+            <span class="keyword">return</span> <span class="identifier">type</span><span class="special">.</span><span class="identifier">__init__</span><span class="special">(</span><span class="identifier">self</span><span class="special">,</span> <span class="identifier">name</span><span class="special">,</span> <span class="identifier">bases</span><span class="special">,</span> <span class="identifier">dict</span><span class="special">)</span>
+
+<span class="comment"># inject some methods in the point foo
+</span><span class="keyword">class</span> <span class="identifier">more_point</span><span class="special">(</span><span class="identifier">injector</span><span class="special">,</span> <span class="identifier">point</span><span class="special">):</span>
+    <span class="keyword">def</span> <span class="identifier">__repr__</span><span class="special">(</span><span class="identifier">self</span><span class="special">):</span>
+        <span class="keyword">return</span> <span class="string">'Point(x=%s, y=%s)'</span> <span class="special">%</span> <span class="special">(</span><span class="identifier">self</span><span class="special">.</span><span class="identifier">x</span><span class="special">,</span> <span class="identifier">self</span><span class="special">.</span><span class="identifier">y</span><span class="special">)</span>
+    <span class="keyword">def</span> <span class="identifier">foo</span><span class="special">(</span><span class="identifier">self</span><span class="special">):</span>
+        <span class="keyword">print</span> <span class="string">'foo!'</span>
+</pre>
+<p>
+        Now let's see how it got:
+      </p>
+<pre class="programlisting">
+<span class="special">&gt;&gt;&gt;</span> <span class="keyword">print</span> <span class="identifier">point</span><span class="special">()</span>
+<span class="identifier">Point</span><span class="special">(</span><span class="identifier">x</span><span class="special">=</span><span class="number">10</span><span class="special">,</span> <span class="identifier">y</span><span class="special">=</span><span class="number">10</span><span class="special">)</span>
+<span class="special">&gt;&gt;&gt;</span> <span class="identifier">point</span><span class="special">().</span><span class="identifier">foo</span><span class="special">()</span>
+<span class="identifier">foo</span><span class="special">!</span>
+</pre>
+<p>
+        Another useful idea is to replace constructors with factory functions:
+      </p>
+<pre class="programlisting">
+<span class="identifier">_point</span> <span class="special">=</span> <span class="identifier">point</span>
+
+<span class="keyword">def</span> <span class="identifier">point</span><span class="special">(</span><span class="identifier">x</span><span class="special">=</span><span class="number">0</span><span class="special">,</span> <span class="identifier">y</span><span class="special">=</span><span class="number">0</span><span class="special">):</span>
+    <span class="keyword">return</span> <span class="identifier">_point</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span> <span class="identifier">y</span><span class="special">)</span>
+</pre>
+<p>
+        In this simple case there is not much gained, but for constructurs with many
+        overloads and/or arguments this is often a great simplification, again with
+        virtually zero memory footprint and zero compile-time overhead for the keyword
+        support.
+      </p>
+</div>
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="python.reducing_compiling_time"></a>Reducing Compiling Time</h3></div></div></div>
+<p>
+        If you have ever exported a lot of classes, you know that it takes quite
+        a good time to compile the Boost.Python wrappers. Plus the memory consumption
+        can easily become too high. If this is causing you problems, you can split
+        the class_ definitions in multiple files:
+      </p>
+<p>
+      </p>
+<pre class="programlisting">
+<span class="comment">/* file point.cpp */</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">h</span><span class="special">&gt;</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+
+<span class="keyword">void</span> <span class="identifier">export_point</span><span class="special">()</span>
+<span class="special">{</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;(</span><span class="string">"point"</span><span class="special">)...;</span>
+<span class="special">}</span>
+
+<span class="comment">/* file triangle.cpp */</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">triangle</span><span class="special">.</span><span class="identifier">h</span><span class="special">&gt;</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+
+<span class="keyword">void</span> <span class="identifier">export_triangle</span><span class="special">()</span>
+<span class="special">{</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">triangle</span><span class="special">&gt;(</span><span class="string">"triangle"</span><span class="special">)...;</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Now you create a file <tt class="literal">main.cpp</tt>, which contains the <tt class="literal">BOOST_PYTHON_MODULE</tt>
+        macro, and call the various export functions inside it.
+      </p>
+<pre class="programlisting">
+<span class="keyword">void</span> <span class="identifier">export_point</span><span class="special">();</span>
+<span class="keyword">void</span> <span class="identifier">export_triangle</span><span class="special">();</span>
+
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">_geom</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">export_point</span><span class="special">();</span>
+    <span class="identifier">export_triangle</span><span class="special">();</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Compiling and linking together all this files produces the same result as
+        the usual approach:
+      </p>
+<pre class="programlisting">
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">h</span><span class="special">&gt;</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">triangle</span><span class="special">.</span><span class="identifier">h</span><span class="special">&gt;</span>
+
+<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">_geom</span><span class="special">)</span>
+<span class="special">{</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;(</span><span class="string">"point"</span><span class="special">)...;</span>
+    <span class="identifier">class_</span><span class="special">&lt;</span><span class="identifier">triangle</span><span class="special">&gt;(</span><span class="string">"triangle"</span><span class="special">)...;</span>
+<span class="special">}</span>
+</pre>
+<p>
+        but the memory is kept under control.
+      </p>
+<p>
+        This method is recommended too if you are developing the C++ library and
+        exporting it to Python at the same time: changes in a class will only demand
+        the compilation of a single cpp, instead of the entire wrapper code.
+      </p>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top"><p>
+          If you're exporting your classes with <a href="../../../../../pyste/index.html" target="_top">Pyste</a>,
+          take a look at the <tt class="literal">--multiple</tt> option, that generates
+          the wrappers in various files as demonstrated here.
+        </p></td></tr>
+</table></div>
+<div class="note"><table border="0" summary="Note">
+<tr>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/html/images/note.png"></td>
+<th align="left">Note</th>
+</tr>
+<tr><td colspan="2" align="left" valign="top"><p>
+          This method is useful too if you are getting the error message <span class="emphasis"><em>"fatal
+          error C1204:Compiler limit:internal structure overflow"</em></span>
+          when compiling a large source file, as explained in the <a href="../../../../v2/faq.html#c1204" target="_top">FAQ</a>.
+        </p></td></tr>
+</table></div>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright © 2002-2005 Joel
+      de Guzman, David Abrahams<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
+        http://www.boost.org/LICENSE_1_0.txt </a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="exception.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a>
+</div>
+</body>
+</html>

doc/tutorial/index.html

@@ -0,0 +1,18 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta http-equiv="refresh" content="0; URL=doc/html/index.html">
+  </head>
+  <body>
+    Automatic redirection failed, click this 
+    <a href="doc/html/index.html">link</a> &nbsp;<hr>
+    <p>© Copyright Beman Dawes, 2001</p>
+    <p>Distributed under the Boost Software License, Version 1.0. (See 
+    accompanying file <a href="../../../../LICENSE_1_0.txt">
+    LICENSE_1_0.txt</a> or copy at
+    <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</p>
+  </body>
+</html>

doc/under-the-hood.html

@@ -1,62 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
-    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
-    <title>
-      A Peek Under the Hood
-    </title>
-    <h1>
-      <img src="../../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="center"
-      width="277" height="86">
-    </h1>
-    <h1>
-      A Peek Under the Hood
-    </h1>
-    <p>
-      Declaring a <code>class_builder&lt;T&gt;</code> causes the instantiation
-      of an <code>extension_class&lt;T&gt;</code> to which it forwards all
-      member function calls and which is doing most of the real work.
-      <code>extension_class&lt;T&gt;</code> is a subclass of <code>
-      PyTypeObject</code>, the <code> struct</code> which Python's 'C' API uses
-      to describe a type. <a href="example1.html#world_class">An instance of the
-      <code>extension_class&lt;&gt;</code></a> becomes the Python type object
-      corresponding to <code>hello::world</code>. When we <a href=
-      "example1.html#add_world_class">add it to the module</a> it goes into the
-      module's dictionary to be looked up under the name "world".
-    <p>
-      BPL uses C++'s template argument deduction mechanism to determine the
-      types of arguments to functions (except constructors, for which we must
-      <a href="example1.html#Constructor_example">provide an argument list</a>
-      because they can't be named in C++). Then, it calls the appropriate
-      overloaded functions <code>PyObject*
-      to_python(</code><em>S</em><code>)</code> and <em>
-      S'</em><code>from_python(PyObject*,
-      type&lt;</code><em>S</em><code>&gt;)</code> which convert between any C++
-      type <em>S</em> and a <code>PyObject*</code>, the type which represents a
-      reference to any Python object in its 'C' API. The <a href= 
-      "example1.html#world_class"><code>extension_class&lt;T&gt;</code></a>
-      template defines a whole raft of these conversions (for <code>T, T*,
-      T&amp;, std::auto_ptr&lt;T&gt;</code>, etc.), using the same inline
-      friend function technique employed by <a href= 
-      "http://www.boost.org/libs/utility/operators.htm">the boost operators
-      library</a>.
-    <p>
-      Because the <code>to_python</code> and <code>from_python</code> functions
-      for a user-defined class are defined by <code>
-      extension_class&lt;T&gt;</code>, it is important that an instantiation of
-      <code> extension_class&lt;T&gt;</code> is visible to any code which wraps
-      a C++ function with a <code>T, T*, const T&amp;</code>, etc. parameter or
-      return value. In particular, you may want to create all of the classes at
-      the top of your module's init function, then <code>def</code> the member
-      functions later to avoid problems with inter-class dependencies.
-    <p>
-      Next: <a href="building.html">Building a Module with BPL</a>
-      Previous: <a href="special.html">Special Method and Operator Support</a>
-      Up: <a href="index.html">Top</a>
-    <p>
-      &copy; Copyright David Abrahams 2000. Permission to copy, use, modify,
-      sell and distribute this document is granted provided this copyright
-      notice appears in all copies. This document is provided "as is" without
-      express or implied warranty, and with no claim as to its suitability for
-      any purpose.
-    <p>
-      Updated: Nov 26, 2000
-

doc/v2/Apr2002.html

@@ -0,0 +1,166 @@
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../boost.css">
+<title>Boost.Python - April 2002 Progress Report</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">April 2002 Progress Report</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<h2>Contents</h2>
+<dl class="index">
+  <dt><a href="#accomplishments">Accomplishments</a></dt>
+  <dl class="index">
+    <dt><a href="#arity">Arbitrary Arity Support</a></dt>
+    <dt><a href="#callbacks">New Callback Interface</a></dt>
+    <dt><a href="#policies">Call Policies for Construtors</a></dt>
+    <dt><a href="#bugs">Real Users, Real Bugs</a></dt>
+    <dt><a href="#insights">New Insights</a></dt>
+    <dt><a href="#v1">Boost.Python V1 Maintenance</a></dt>
+  </dl>
+
+  <dt><a href="#missing">What's Missing</a></dt>
+
+</dl>
+
+<h2><a name="accomplishments">Accomplishments</a></h2>
+
+April was a short month as far as Boost.Python was concerned, since
+the spring ISO C++ Committee Meeting (and associated vacation)
+occupied me for the 2nd half of the month. However, a suprising amount
+of work got done...
+
+<h3><a name="arity">Arbitrary Arity Support</a></h3>
+
+I began using the <a
+href="../../../preprocessor/doc/index.html">Boost.Preprocessor</a>
+metaprogramming library to generate support for functions and member
+functions of arbitrary arity, which was, to say the least, quite an
+adventure. The feedback cycle resulting from my foray into
+Boost.Preprocessor resulted in several improvements to the library,
+most notably in its documentation. 
+
+<p>
+
+Boost.Python now supports calls of up to 17 arguments on most
+compilers. Because most EDG-based compilers have dismal preprocessor
+performance, I had to &quot;manually&quot; expand the metaprograms for
+arities from zero to fifteen arguments, and EDG-based compilers with
+<code>__EDG_VERSION__&nbsp;&lt;=&nbsp;245</code> only support 15
+arguments by default. If some crazy program finds a need for more than
+the default arity support, users can increase the base support by
+setting the <code>BOOST_PYTHON_MAX_ARITY</code> preprocessor symbol.
+
+<h3><a name="callbacks">New Callback Interface</a></h3>
+
+I mentioned in <a href="Mar2002.html">last month's report</a> that I
+wasn't pleased with the interface for the interface for calling into
+Python, so now it has been redesigned. The new interface is outlined
+in <a
+href="http://mail.python.org/pipermail/c++-sig/2002-April/000953.html">this
+message</a> (though the GCC 2.95.3 bugs have been fixed).
+
+<h3><a name="policies">Call Policies for Constructors</a></h3>
+
+On April 2nd, I <a
+href="http://mail.python.org/pipermail/c++-sig/2002-April/000916.html">announced</a>
+support for the use of call policies with constructors.
+
+<h3><a name="bugs">Real Users, Real Bugs</a></h3>
+
+At least two people outside of Kull began actually using Boost.Python
+v2 in earnest this month. Peter Bienstman and Pearu Pearson both
+provided valuable real-world bug reports that helped me to improve the
+library's robustness.
+
+<h3><a name="insights">New Insights</a></h3>
+
+<a
+href="http://mail.python.org/pipermail/c++-sig/2002-May/001010.html"
+>Answering some of Pearu's questions</a> about explicitly converting
+objects between Python and C++ actually led me to a new understanding
+of the role of the current conversion facilities. In Boost.Python v1,
+all conversions between Python and C++ were handled by a single family
+of functions, called <code>to_python()</code> and
+<code>from_python()</code>. Since the primary role of Boost.Python is
+to wrap C++ functions in Python, I used these names for the first kind
+of converters I needed: those that extract C++ objects to be used as
+function arguments and which C++ function return values to
+Python. The better-considered approach in Boost.Python v2 uses a
+completely different mechanism for conversions used when calling
+Python from C++, as in wrapped virtual function implementations. I
+usually think of this as a &quot;callback&quot;, as in &quot;calling
+back into Python&quot;, and I named the converters used in callbacks
+accordingly: <code>to_python_callback</code> and
+<code>from_python_callback</code>. However, as it turns out, the
+behavior of the &quot;callback&quot; converters is the appropriate one
+for users who want to explicitly extract a C++ value from a Python
+object, or create a Python object from a C++ value. The upshot is that
+it probably makes sense to change the name of the existing <code>to_python</code> and
+<code>from_python</code> so those names are available for the
+user-friendly explicit converters.
+
+<p>
+<a
+href="http://mail.python.org/pipermail/c++-sig/2002-May/001013.html">Another
+of Pearu's questions</a> pushes momentum further in the direction of a
+more-sophisticated overloading mechanism than the current
+simple-minded &quot;first match&quot; approach, as I suggested <a
+href="Mar2002.html#implicit_conversions">last month</a>.
+
+<h3><a name="v1">Boost.Python V1 Maintenance</a></h3>
+
+As much as I'm looking forward to retiring Boost.Python v1, a
+significant amount of effort has been being spent dealing with support
+problems; the saying that code rots when left alone is true, and
+Boost.Python is no exception. Eventually it became obvious to me that
+we were going to have to invest some effort in keeping V1 healthy
+while working on V2. Ralf and I have expanded support for various
+compilers and stabilized the V1 codebase considerably. We discarded
+the obsolete Visual Studio projects which were causing so much
+confusion. Still to do before the next Boost release:
+<ol>
+<li>Update the build/test documentation with detailed instructions for
+configuring various toolsets.
+<li>Provide some links to Boost.Python v2 to let people know what's
+coming.
+</ol>
+
+
+<h2><a name="missing">What's Missing</a></h2>
+
+Last month I announced that I would implement the following which are
+not yet complete:
+<ol>
+<li>Document all implemented features
+<li>Implement conversions for <code>char</code> types. This is
+implemented but not tested, so we have to assume it doesn't work.
+</ol>
+
+These are my first priority for this month (especially the
+documentation).
+
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+<p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 
+  2002. </i></p>
+</body>
+</html>

doc/v2/CallPolicies.html

@@ -0,0 +1,165 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../../../../boost.css">
+
+    <title>Boost.Python - CallPolicies Concept</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">CallPolicies Concept</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#composition">CallPolicies Composition</a></dt>
+
+      <dt><a href="#concept-requirements">Concept Requirements</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#CallPolicies-concept">CallPolicies Concept</a></dt>
+        </dl>
+      </dd>
+    </dl>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p>Models of the CallPolicies concept are used to specialize the behavior
+    of Python callable objects generated by Boost.Python to wrapped C++
+    objects like function and member function pointers, providing three
+    behaviors:</p>
+
+    <ol>
+      <li><code>precall</code> - Python argument tuple management before the
+      wrapped object is invoked</li>
+
+      <li><code>result_converter</code> - C++ return value handling</li>
+
+      <li><code>postcall</code> - Python argument tuple and result management
+      after the wrapped object is invoked</li>
+      <li><code>extract_return_type</code> - metafunction for extracting the return type from a given signature type sequence</li>
+    </ol>
+
+    <h2><a name="composition"></a>CallPolicies Composition</h2>
+    In order to allow the use of multiple models of CallPolicies in the same
+    callable object, Boost.Python's CallPolicies class templates provide a
+    chaining interface which allows them to be recursively composed. This
+    interface takes the form of an optional template parameter,
+    <code>Base</code> which defaults to <a href=
+    "default_call_policies.html#default_call_policies-spec"><code>default_call_policies</code></a>.
+    By convention, the <code>precall</code> function of the <code>Base</code>
+    is invoked <i>after</i> the <code>precall</code> function supplied by the
+    outer template, and the <code>postcall</code> function of the
+    <code>Base</code> is invoked <i>before</i> the <code>postcall</code>
+    function of the outer template. If a <code>result_converter</code> is
+    supplied by the outer template, it <i>replaces</i> any
+    <code>result_converter</code> supplied by the <code>Base</code>. For an
+    example, see <a href=
+    "return_internal_reference.html#return_internal_reference-spec"><code>return_internal_reference</code></a>.
+    
+
+    <h2><a name="concept-requirements"></a>Concept Requirements</h2>
+
+    <h3><a name="CallPolicies-concept"></a>CallPolicies Concept</h3>
+
+    <p>In the table below, <code><b>x</b></code> denotes an object whose type
+    <code><b>P</b></code> is a model of CallPolicies, <code><b>a</b></code>
+    denotes a <code>PyObject*</code> pointing to a Python argument tuple
+    object, and <code><b>r</b></code> denotes a <code>PyObject*</code>
+    referring to a "preliminary" result object.</p>
+
+    <table summary="CallPolicies expressions" border="1" cellpadding="5">
+      <tr>
+        <td><b>Expression</b></td>
+
+        <td><b>Type</b></td>
+
+        <td><b>Result/Semantics</b></td>
+      </tr>
+
+      <tr>
+        <td valign="top"><code>x.precall(a)</code></td>
+
+        <td>convertible to <code>bool</code></td>
+
+        <td>returns <code>false</code> and <code><a href=
+        "http://www.python.org/doc/2.2/api/exceptionHandling.html#l2h-71">PyErr_Occurred</a>()&nbsp;!=&nbsp;0</code>
+        upon failure, <code>true</code> otherwise.</td>
+      </tr>
+
+      <tr>
+        <td valign="top"><code>P::result_converter</code></td>
+
+        <td>A model of <a href=
+        "ResultConverter.html#ResultConverterGenerator-concept">ResultConverterGenerator</a>.</td>
+
+        <td>An MPL unary <a href=
+        "../../../mpl/doc/refmanual/metafunction-class.html">Metafunction
+        Class</a> used produce the "preliminary" result object.</td>
+      </tr>
+
+      <tr>
+        <td valign="top"><code>x.postcall(a, r)</code></td>
+
+        <td>convertible to <code>PyObject*</code></td>
+
+        <td>0 <code>0</code> and <code><a href=
+        "http://www.python.org/doc/2.2/api/exceptionHandling.html#l2h-71">PyErr_Occurred</a>()&nbsp;!=&nbsp;0</code>
+        upon failure. Must "conserve references" even in the event of an
+        exception. In other words, if <code>r</code> is not returned, its
+        reference count must be decremented; if another existing object is
+        returned, its reference count must be incremented.</td>
+      </tr>
+      <tr>
+        <td valign="top"><code>P::extract_return_type</code></td>
+
+        <td>A model of <a href=
+          "../../../mpl/doc/refmanual/metafunction.html">Metafunction</a>.</td>
+
+        <td>An MPL unary <a href=
+          "../../../mpl/doc/refmanual/metafunction.html">Metafunction</a> used extract the return type from a given signature. By default it is derived from mpl::front.</td>
+      </tr>
+  </table>
+    Models of CallPolicies are required to be <a href=
+    "../../../utility/CopyConstructible.html">CopyConstructible</a>. 
+    <hr>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+
+    <p>Permission to copy, use, modify, sell and distribute this software is
+    granted provided this copyright notice appears in all copies. This
+    software is provided "as is" without express or implied warranty, and
+    with no claim as to its suitability for any purpose.</p>
+  </body>
+</html>
+

doc/v2/Dereferenceable.html

@@ -0,0 +1,74 @@
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../../../../boost.css">
+<title>Boost.Python - Dereferenceable Concept</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+      <h3><a href="../../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">Dereferenceable Concept</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<dl class="page-index"> 
+  <dt><a href="#introduction">Introduction</a></dt>
+  <dt><a href="#concept-requirements">Concept Requirements</a></dt>
+  <dl class="page-index"> 
+    <dt><a href="#Dereferenceable-concept">Dereferenceable Concept</a></dt>
+  </dl>
+</dl>
+
+<h2><a name="introduction"></a>Introduction</h2>
+
+<p>Instances of a Dereferenceable type can be used like a pointer to access an lvalue.
+
+<h2><a name="concept-requirements"></a>Concept Requirements</h2>
+<h3><a name="Dereferenceable-concept"></a>Dereferenceable Concept</h3>
+
+<p>In the table below, <code><b>T</b></code> is a model of
+Dereferenceable, and <code><b>x</b></code> denotes an object of
+type <code>T</code>.  In addition, all pointers are Dereferenceable.
+
+<table summary="Dereferenceable expressions" border="1" cellpadding="5">
+
+  <tr> 
+    <td><b>Expression</b></td>
+    <td><b>Result</b></td>
+    <td><b>Operational Semantics</b></td>
+  </tr>
+
+  <tr> 
+    <td><code>get_pointer(x)</code></td>
+    <td>convertible to <code><a href="pointee.html#pointee-spec">pointee</a>&lt;T&gt;::type*</code>
+    <td><code>&amp;*x</code>, or a null pointer
+  </tr>
+<tr>
+
+</table>
+
+<hr>
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  18 December, 2003
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+    <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+    Abrahams</a> 2002-2003. </i>
+
+<p>Permission to copy, use, modify, sell
+ and distribute this software is granted provided this copyright notice appears
+ in all copies. This software is provided "as is" without express or implied
+ warranty, and with no claim as to its suitability for any purpose.
+</body>
+</html>

doc/v2/Extractor.html

@@ -0,0 +1,96 @@
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../../../../boost.css">
+<title>Boost.Python - Extractor Concept</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+      <h3><a href="../../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">Extractor Concept</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<dl class="page-index"> 
+  <dt><a href="#introduction">Introduction</a></dt>
+  <dt><a href="#concept-requirements">Concept Requirements</a></dt>
+  <dl class="page-index"> 
+    <dt><a href="#Extractor-concept">Extractor Concept</a></dt>
+  </dl>
+  <dt><a href="#notes">Notes</a></dt>
+</dl>
+
+<h2><a name="introduction"></a>Introduction</h2>
+
+<p>An Extractor is a class which Boost.Python can use to extract C++
+objects from Python objects, and is typically used by facilities that
+define <code>from_python</code> conversions for
+&quot;traditional&quot; Python extension types. 
+
+<h2><a name="concept-requirements"></a>Concept Requirements</h2>
+<h3><a name="Extractor-concept"></a>Extractor Concept</h3>
+
+<p>In the table below, <code><b>X</b></code> denotes a model of
+Extractor and <code><b>a</b></code> denotes an instance of a Python
+object type.
+
+<table summary="Extractor expressions" border="1" cellpadding="5">
+
+  <tr> 
+    <td><b>Expression</b></td>
+    <td><b>Type</b></td>
+    <td><b>Semantics</b></td>
+  </tr>
+
+  <tr> 
+    <td valign="top"><code>X::execute(a)</code></td>
+    <td>non-void
+    <td>Returns the C++ object being extracted. The
+    <code>execute</code> function must not be overloaded.
+  </tr>
+
+  <tr> 
+    <td valign="top"><code>&amp;a.ob_type</code>
+    <td><code><a
+        href="http://www.python.org/doc/2.2/ext/dnt-type-methods.html">PyTypeObject</a>**</code>
+    <td>Points to the <code>ob_type</code> field of an object which is
+    layout-compatible with <code>PyObject</code>
+  </tr>
+
+  </tr>
+
+</table>
+
+<h2><a name="notes"></a>Notes</h2>
+
+Informally, an Extractor's <code>execute</code> member must be a
+non-overloaded static function whose single argument is a Python
+object type. Acceptable Python object types include those publicly (and
+unambiguously) derived from <code>PyObject</code>, and POD types which
+are layout-compatible with PyObject.
+
+<hr>
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+    <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+    Abrahams</a> 2002. </i>
+
+<p>Permission to copy, use, modify, sell
+ and distribute this software is granted provided this copyright notice appears
+ in all copies. This software is provided "as is" without express or implied
+ warranty, and with no claim as to its suitability for any purpose.
+</body>
+</html>

doc/v2/HolderGenerator.html

@@ -0,0 +1,74 @@
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../../../../boost.css">
+<title>Boost.Python - Holder Concept</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+      <h3><a href="../../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">HolderGenerator Concept</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<dl class="page-index"> 
+  <dt><a href="#introduction">Introduction</a></dt>
+  <dt><a href="#concept-requirements">Concept Requirements</a></dt>
+  <dl class="page-index"> 
+    <dt><a href="#HolderGenerator-concept">HolderGenerator Concept</a></dt>
+  </dl>
+</dl>
+
+<h2><a name="introduction"></a>Introduction</h2>
+
+<p>A HolderGenerator is a unary metafunction class which returns types
+suitable for holding instances of its argument in a wrapped C++ class
+instance.
+
+<h2><a name="concept-requirements"></a>Concept Requirements</h2>
+<h3><a name="HolderGenerator-concept"></a>HolderGenerator Concept</h3>
+
+<p>In the table below, <code><b>G</b></code> denotes an type which
+models HolderGenerator, and <code><b>X</b></code> denotes a class
+type.
+
+<table summary="Holder expressions" border="1" cellpadding="5">
+
+  <tr> 
+    <td><b>Expression</b></td>
+    <td><b>Requirements</b></td>
+  </tr>
+
+  <tr> 
+    <td valign="top"><code>G::apply&lt;X&gt;::type</code></td>
+    <td>A concrete subclass of <a
+    href="instance_holder.html#instance_holder-spec">instance_holder</a>
+    which can hold objects of type <code>X</code>.
+  </tr>
+</table>
+
+<hr>
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+    <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+    Abrahams</a> 2002. </i>
+
+<p>Permission to copy, use, modify, sell
+ and distribute this software is granted provided this copyright notice appears
+ in all copies. This software is provided "as is" without express or implied
+ warranty, and with no claim as to its suitability for any purpose.
+</body>
+</html>

doc/v2/Jun2002.html

@@ -0,0 +1,229 @@
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../boost.css">
+<title>Boost.Python - June 2002 Progress Report</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">June 2002 Progress Report</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<h2>Contents</h2>
+<dl class="index">
+  <dt><a href="#intro">Introduction</a></dt>
+  <dt><a href="#handle"><code>handle&lt;T&gt;</code></a></dt>
+  <dt><a href="#object"><code>object</code></a></dt>
+  <dl class="index">
+    <dt><a href="#operators"><code>object</code> operators</a></dt>
+    <dt><a href="#conversions"><code>object</code> conversions</a></dt>
+  </dl>
+  <dt><a href="#list"><code>list</code></a></dt>
+  <dt><a href="#numerics"><code>Numerics</code></a></dt>
+  <dt><a href="#community">Community</a></dt>
+  <dt><a href="#next">What's Next</a></dt>
+</dl>
+
+<h2><a name="intro">Introduction</a></h2>
+
+July was mostly focused on allowing expressive manipulation of
+individual Python objects, or what Ralf Grosse-Kunstleve calls
+&quot;Writing Python in C++&quot;. The work began with this <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001311.html">posting</a>,
+which outlines the issues and intention.
+
+<h2><a name="handle"><code>handle&lt;T&gt;</code></a></h2>
+
+The most basic element needed was a replacement for the
+<code>reference&lt;&gt;</code> class template and the
+<code>ref</code> typedef from Boost.Python v1, a simple smart
+pointer to a Python object. The old v1 typedef
+&quot;<code>ref</code>&quot; (for
+<code>reference&lt;PyObject&gt;</code>) had to be retired because I
+thought it would be too confusing given the importance of <code><a
+href="../../../bind/ref.html">boost::ref</a>()</code> to this
+library. I began a <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001311.html">discussion</a>of
+possible names, and it was eventually <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001337.html">decided</a>
+to rename <code>reference</code> to <code>handle</code> and supply a
+default argument so that <code>ref</code> could be spelled
+<code>handle&lt;&gt;</code> without an additional typedef. There
+were also some interface changes to make it safer and more-efficient
+to interface with the raw
+<code>PyObject*</code>s forced on us by Python's 'C' API. A
+discussion of those protocols can be found <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001401.html">here</a>.
+
+<h2><a name="handle"><code>object</code></a></h2>
+
+It is intended that users will seldom need or want to work with
+<code>handle&lt;&gt;</code>; its major distinguishing features are
+that it gives direct access to the underlying object representation
+through <code>operator*</code> and <code>operator-&gt;</code>, and
+that can be <code>NULL</code>, both sources of danger. Instead the
+library provides a class called <code>object</code>, which
+encapsulates a valid Python object and provides a similar interface to
+Python's.
+
+<h3><a name="operators"><code>object</code> operators</a></h3>
+
+The first challenge was to provide support for object manipulations
+using a Python-like syntax, mostly in the form of operator overloads:
+
+<table border="1">
+<tr><th>Python <th>C++
+
+<tr>
+  <td><code>y = x.foo</code>  <td><code>y = x.attr(&quot;foo&quot;); 
+<tr>
+  <td><code>x.foo = 1</code>  <td><code>x.attr(&quot;foo&quot;) = 1; 
+
+<tr>
+  <td><code>y = x[z]</code>  <td><code>y = x[z];
+<tr>
+  <td><code>x[z] = 1</code>  <td><code>x[z] = 1; 
+
+<tr>
+  <td><code>y = x[3:-1]</code>  <td><code>y = x.slice(3,-1); 
+
+<tr>
+  <td><code>y = x[3:]</code>  <td><code>y = x.slice(3,_); 
+
+<tr>
+  <td><code>y = x[:-2]</code>  <td><code>y = x.slice(_,-2); 
+
+<tr>
+  <td><code>z = x(1, y)</code>  <td><code>z = x(1, y);
+<tr>
+  <td><code>z = x.f(1, y)</code>  <td><code>z = x.attr(&quot;f&quot;)(1, y);
+
+<tr>
+  <td><code>not x</code>  <td><code>!x
+
+<tr>
+  <td><code>x and y</code>  <td><code>x and y
+</table>
+
+I'm still a unsatisfied with the interface for attribute access. There
+original proposal  used a syntax like this one:
+<pre>
+y = x._(&quot;foo&quot;); 
+x._(&quot;foo&quot;) = 1; 
+</pre>
+
+which was only marginally better than what we've got. Niki Spahiev
+then <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001447.html">pointed
+out</a> a potential conflict with the macro which GNU Gettext <a
+href="http://www.gnu.org/manual/gettext/html_mono/gettext.html#SEC6">suggests</a>
+people define. This unfortunate state of affairs forced us into using
+<code>attr</code> instead. I'd still like to find a better interface,
+but the lack of overloadable C++ operators which aren't already used
+in Python is an obstacle. The comma operator is still a possibility,
+but it has the wrong precedence:
+<pre>
+y = x,&quot;foo&quot;    // error
+x,&quot;foo&quot; = 1;   // error
+
+y = (x,&quot;foo&quot;); // ok
+(x,&quot;foo&quot;) = 1; // ok
+</pre>
+
+Well, I guess we could consider adding that to the interface without
+removing <code>attr()</code>, to see how it plays out...
+
+<h3><a name="operators"><code>object</code> conversions</a></h3>
+
+The <code>object</code> class also provided an opportunity to replace
+Boost.Python v1's <code>to_python()</code> as a user-level
+interface. Instead, <code>object</code> has a templated constructor
+which can be used to convert any C++ object to Python using the same
+underlying mechanisms used for the arguments to <code><a
+href="call.html">call</a>&lt;&gt;</code>.
+
+<p>Incidentally, the implementation of operator and conversion support
+for object uncovered an inordinate number of compiler bugs in our
+targeted platforms. It was a lot more &quot;interesting&quot; than it
+should have been.
+
+<h2><a name="list"><code>list</code></a></h2>
+
+With <code>object</code> implemented, it was time to begin replacing
+the ad-hoc implementations of <code>list</code>, <code>string</code>,
+and <code>dictionary</code> supplied by Boost.Python v1 with something
+more robust. I started with <code>list</code> as an example. Because
+<code>object</code> already provides all of the requisite operators,
+publicly deriving <code>list</code> from object seemed like a good
+choice. The remaining issues were what do do about the one-argument
+list constructor (which in Python attempts to convert its argument to
+a list), and how to deal converting with <code>list</code> arguments
+to wrapped functions. Some of the issues are laid out in <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001551.html">this
+thread</a>. Ultimately, it was decided that <code>list(x)</code>
+should do the same thing in C++ as in Python (conversion), while
+<code>list</code> arguments should only match Python
+<code>list</code>s (and <code>list</code> subclasses). The
+implementation worked well, and provided a <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001586.html">roadmap</a>
+for the protocol to be used for implementation of the other built-in
+types.
+
+<h2><a name="numerics">Numerics</a></h2>
+
+Support for C++ <code>long long</code> and <code>unsigned long
+long</code>
+(and <code>__int64</code> on MSVC) to/from python conversions was
+added this month. We also improved handling of numeric overflows when
+converting, e.g., a Python int to a type with a more limited range of
+representation.
+
+<h2><a name="community">Community</a></h2>
+
+<ul>
+<li>Ralf W. Grosse-Kunstleve and Nick Sauter have implemented
+<a href="http://cci.lbl.gov/boost/">multiplatform nightly
+build-and-test</a> runs for Boost.Python V2 at LBL.
+
+<li>Dave Hawkes has made significant progress on generating the
+Python <a
+href="http://mail.python.org/pipermail/c++-sig/2002-June/001503.html">built-in
+function and API wrappers</a>
+
+<li>Achim Domma has agreed to take up the job of implementing the
+<code>str</code>, <code>dict</code>, and <code>tuple</code> classes.
+</ul>
+
+Deep thanks to all the Boost.Python contributors! This project
+wouldn't be possible without your participation.
+
+  <h2><a name="next">What's Next</a></h2>
+
+As I write this we are already well into the month of July, so I
+suggest you consult the <a
+href="http://mail.python.org/pipermail/c++-sig/2002-July/">Mailing
+List Archive</a> if you want to know what's been happening. Otherwise
+you'll just have to wait till next month (hopefully the beginning).
+
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+<p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 
+  2002. </i></p>
+</body>
+</html>

doc/v2/Mar2002.html

@@ -0,0 +1,237 @@
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../boost.css">
+<title>Boost.Python - March 2002 Progress Report</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">March 2002 Progress Report</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<h2>Contents</h2>
+<dl class="index">
+  <dt><a href="#accomplishments">Accomplishments</a></dt>
+  <dl class="index">
+    <dt><a href="#calling_python">Calling Python from C++</a></dt>
+    <dt><a href="#virtual_functions">Virtual Functions</a></dt>
+    <dt><a href="#abstract_classes">Abstract Classes</a></dt>
+    <dt><a href="#implicit_conversions">C++ Implicit Conversions</a></dt>
+    <dt><a href="#data_members">C++ Data Members</a></dt>
+    <dt><a href="#miscellaneous">Miscellaneous</a></dt>
+  </dl>
+
+  <dt><a href="#future">The Near future</a></dt>
+
+  <dt><a href="#notes">Notes</a></dt>
+
+</dl>
+
+<h2><a name="accomplishments">Accomplishments</a></h2>
+
+March was mostly devoted to the reimplementation of features from
+Boost.Python v1, and some new features. Re-examination of the features
+from Boost.Python v1 allowed me to make significant improvements.
+
+<h3><a name="calling_python">Calling Python from C++</a></h3>
+
+The ability to call Python from C++ is crucial for virtual function
+support. Implementing this feature well for V2 proved to be more
+interesting than I expected. You can review most of the relevant
+design decisions
+<a href="callbacks.txt">here</a>.
+
+<p>
+One point which <i>isn't</i> emphasized in that document is that there
+are subtle differences in the way <code>from_python</code> conversions
+work when used for C++ function arguments and Python function return
+values. In particular, while <code>T const&amp;</code> arguments may
+invoke rvalue converters, a reference-to-const return value requires
+an lvalue converter, since a temporary conversion result would leave
+the returned reference dangling.
+
+<p>I'm not particularly pleased with the current callback interface,
+since it usually results in constructs like:
+<pre>
+<u>return returning</u>&lt;X&amp;&gt;::call(f, obj);
+</pre>
+However, I think the following may be possible and I plan to investigate:
+<pre>
+return apply&lt;X&amp;&gt;(f, obj);
+</pre>
+I'm open to suggestion for better names (and syntaxes)!
+
+<h3><a name="virtual_functions">Virtual Functions</a></h3>
+
+Once Python callbacks were implemented, it was just a short step to
+implementing virtual functions. Python extension class exposing a C++
+class whose virtual functions are overridable in Python must actually
+hold a C++ instance of a class <i>derived</i> from the one exposed to
+Python. Needing some way for users to specify that class, I added an
+optional template argument to <code>value_holder_generator</code> and
+<code>pointer_holder_generator&lt;&gt;</code> to specify the class
+actually held. This move began to put pressure on the
+<code>class_&lt;&gt;</code> interface, since the need for the user to
+produce complicated instantations of
+<code>class_&lt;&gt;</code> was increased:
+
+<pre>
+class&lt;Foo, bases&lt;&gt;, value_holder_generator&lt;Foo_callback&gt; &gt;(&quot;Foo&quot;)
+.def(&quot;hello&quot;, &amp;Foo::hello)
+...
+</pre>
+
+<h3><a name="abstract_classes">Abstract Classes</a></h3>
+
+Normally when a C++ class is exposed to Python, the library registers
+a conversion function which allows users to wrap functions returning
+values of that type. Naturally, these return values are temporaries,
+so the conversion function must make a copy in some
+dynamically-allocated storage (a &quot;holder&quot;) which is managed
+by the corresponding Python object.
+
+<p>Unfortunately, in the case of abstract classes (and other types
+without a publicly-accessible copy constructor), instantiating this
+conversion function causes a compilation error.  In order to support
+non-copyable classes, there had to be some way to prevent the library
+from trying to instantiate the conversion function. The only practical
+approach I could think of was to add an additional template parameter
+to the <code>class_&lt;&gt;</code> interface. When the number of
+template parameters with useful defaults begins to grow, it is often
+hard to choose an order which allows users to take advantage of the
+defaults.
+
+<p>
+
+This was the straw that broke the
+<code>class_&lt;&gt;</code> interface's back and caused the redesign
+whose outcome is detailed <a
+href="http://mail.python.org/pipermail/c++-sig/2002-March/000892.html">here</a>.
+The approach allows the user to supply the optional parameters in an
+arbitrary order. It was inspired by the use of <a
+href="../../../utility/iterator_adaptors.htm#named_tempalte_parameters">named
+template parameters</a> in the <a
+href="../../../utility/iterator_adaptors.htm">Boost Iterator Adaptor
+Library</a>, though in this case it is possible to deduce the meaning
+of the template parameters entirely from their type properties,
+resulting in a simpler interface. Although the move from a
+policy-based design to what resembles a configuration DSL usually
+implies a loss of flexibility, in this case I think any costs are far
+outweighed by the advantages.
+
+<p>Note: working around the limitations of the various compilers I'm
+supporting was non-trivial, and resulted in a few messy implementation
+details. It might be a good idea to switch to a more-straightforward
+approach once Metrowerks CodeWarrior Pro8 is released.
+
+<h3><a name="implicit_conversions">C++ Implicit Conversions</a></h3>
+
+Support for C++ implicit conversion involves creating
+<code>from_python</code> converters for a type <code>U</code> which in
+turn use <code>from_python</code> converters registered for a type
+<code>T</code> where there exists a implicit conversion from
+<code>T</code> to <code>U</code>. The current implementation is
+subject to two inefficiencies:
+<ol>
+
+<li>Because an rvalue <code>from_python</code> converter produces two
+pieces of data (a function and a <code>void*</code>) from its
+<code>convertible()</code> function, we end up calling the function
+for <code>T</code> twice: once when the converter is looked up in the
+registry, and again when the conversion is actually performed. 
+
+<li>A vector is used to mark the "visited" converters, preventing
+infinite recursion as <code>T</code> to
+<code>U</code> and <code>U</code> to <code>T</code> converters
+continually search through one-another.
+
+</ol>
+
+I consider the former to be a minor issue. The second may or may not
+prove to be computationally significant, but I believe that
+architecturally, it points toward a need for more sophisticated
+overload resolution. It may be that we want CLOS-style multimethod
+dispatching along with C++ style rules that prevent more than one
+implicit conversion per argument.
+
+<h3><a name="data_members">C++ Data Members</a></h3>
+
+To supply the ability to directly access data members, I was able to
+hijack the new Python <a
+href="http://www.python.org/2.2/descrintro.html#property">property</a>
+type. I had hoped that I would also be able to re-use the work of <a
+href="make_function.html">make_function</a> to create callable python
+objects from C++ functions which access a data member of a given
+class. C++ facilities for specifying data member pointer non-type
+template arguments require the user to explicitly specify the type of
+the data member and this under-utilized feature is also not
+well-implemented on all compilers, so passing the member pointer as a
+runtime value is the only practical approach. The upshot is that any
+such entity would actually have to be a function <i>object</i>, and I
+haven't implemented automatic wrapping of C++ callable function
+objects yet, so there is less re-use in the implementation than I'd
+like. I hope to implement callable object wrapping and refactor this
+code one day. I also hope to implement static data member support,
+for which Python's property will not be an appropriate descriptor.
+
+<h3><a name="miscellaneous">Miscellaneous</a></h3>
+<ul>
+<li>Moved <code>args&lt;&gt;</code> and <code>bases&lt;&gt;</code> from unnamed namespace to <code>boost::python</code> in their own header files.
+<li>Convert <code>NULL</code> pointers returned from wrapped C++ functions to <code>None</code>.
+<li>Improved some compile-time error checks.
+<li>Eliminated <code>boost/python/detail/eval.hpp</code> in favor of
+more-general <code>boost/mpl/apply.hpp</code>.
+<li>General code cleanup and refactoring.
+<li>Works with Microsoft Visual C++ 7.0
+<li>Warning suppression for many compilers
+<li>Elegant interface design for exporting <code>enum</code> types.
+</ul>
+<hr>
+
+<h2><a name="future">The Near Future</a></h2>
+
+Before April 15th I plan to 
+<ol>
+<li>Document all implemented features
+<li>Implement a <code>CallPolicy</code> interface for constructors of wrapped
+classes
+<li>Implement conversions for <code>char</code> types.
+<li>Implement automated code generation for all headers containing
+families of overloaded functions to handle arbitrary arity.
+</ol>
+
+I also hope to implement a mechanism for generating conversions
+between arbitrary Python sequences and C++ containers, if time permits
+(and others haven't already done it)!
+
+<h2><a name="notes">Notes</a></h2>
+
+The older version of KCC used by Kull is generating lots of warnings
+about a construct I use to instantiate static members of various class
+templates. I'm thinking of moving to an idiom which uses a function
+template to suppress it, but worry about bloating the size of debug
+builds. Since KCC users may be moving to GCC, I'm not sure that it's
+worth doing anything about it.
+
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+<p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 
+  2002. </i></p>
+</body>
+</html>

doc/v2/May2002.html

@@ -0,0 +1,311 @@
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../boost.css">
+<title>Boost.Python - May 2002 Progress Report</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">May 2002 Progress Report</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<h2>Contents</h2>
+<dl class="index">
+  <dt><a href="#intro">Introduction</a></dt>
+  <dt><a href="#features">New Features</a></dt>
+  <dl>
+    <dt><a href="#aix_shared">Shared Library Support for AIX</a><dd>
+    <dt><a href="#class_enhancements">Class Enhancements</a><dd>
+    <dl>
+      <dt><a href="#operators">Operators</a><dd>
+      <dt><a href="#iterators">Iterators</a><dd>
+      <dt><a href="#properties">Properties</a><dd>
+      <dt><a href="#setattr">setattr</a><dd>
+      <dt><a href="#module">__module__ Attribute</a><dd>
+    </dl>
+    <dt><a href="#back_reference">back_reference</a><dd>
+ </dl>
+
+  <dt><a href="#documentation">Documentation</a></dt>
+   <dt><a href="#misc">Miscellaneous</a></dt>
+  <dl class="index">
+    <dt><a href="#converters">Converters</a></dt>
+    <dt><a href="#checkins">Checkins Mailing List</a></dt>
+    <dt><a href="#shared">Shared Libraries</a></dt>
+  </dl>
+
+  <dt><a href="#next">What's Next</a></dt>
+</dl>
+
+<h2><a name="intro">Introduction</a></h2>
+
+Aside from library development, work on Boost.Python in May was
+focused on reducing the support burden. In recent weeks, responding to
+requests for support, espcially surrounding building the library, had
+begun to impede progress on development. There was a major push to
+release a stable 1.28.0 of Boost, including documentation of <a
+href="../../../../tools/build/v1/build_system.htm">Boost.Build</a> and specific
+<a href="../building.html">instructions</a> for building Boost.Python
+v1. The documentation for Boost.Python v2 was also updated as
+described <a href="#documentation">here</a>.
+
+<h2><a name="features">New Features</a></h2>
+
+  <h3><a name="aix_shared">Shared Library Support for AIX</a></h3>
+
+  The Kull group required the ability to build and test Boost.Python
+  extensions on AIX, a platform with &quot;creatively designed&quot;
+  shared library semantics. Making this work was a multi-pronged
+  effort, involving changes to Boost.Build and some great research by
+  Martin Casado which uncovered the key mechanism required to allow
+  shared libraries to use functions from the Python executable. The
+  current solution used in Boost.Build relies on a <a
+  href="../../../../tools/build/v1/gen_aix_import_file.py">Python
+  Script</a> as part of the build process. This is not a problem for
+  Boost.Python, as Python will be available. However, the commands
+  issued by the script are so simple that a 100%-pure-Boost.Jam
+  solution is surely possible. Linking on AIX is sufficiently
+  interesting to have skewed the Boost.Python development schedule a
+  bit.
+
+  <h3><a name="class_enhancements">Class Enhancements</a></h3>
+
+      <h4><a name="operators">Operators</a></h4>
+
+Support for exposing C++ operators and functions as the corresponding
+Python special methods was added. Thinking that the Boost.Python
+v1 interface was a little too esoteric (especially the use of
+<code>left_operand&lt;...&gt;/right_operand&lt;...&gt;</code> for
+asymmetric operands), I introduced a simple form of <a
+href="http://osl.iu.edu/~tveldhui/papers/Expression-Templates/exprtmpl.html">expression
+templates</a> which allow users to simply write the expressions that
+should be wrapped, as in this <a href="operators.html#examples">example</a>.
+
+      <h4><a name="iterators">Iterators</a></h4>
+
+Python iterator support as required by the Kull project resulted in a
+highly flexible interface allowing:
+
+<dl>
+
+<dt>Direct exposure of a class' <code>begin()</code> and
+<code>end()</code> functions:
+
+<pre>
+    ...
+    .def(&quot;__iter__&quot;, iterator&lt;list_int&gt;())
+</pre>
+<dd>
+
+<dt>Creation of iterators from member functions...
+<pre>
+    ...
+    .def(&quot;__iter__&quot;
+         , range(&amp;my_class::x_begin, &amp;my_class::x_end))
+    )
+</pre>
+<dd>
+
+<dt>...and member data:
+<pre>
+    ...
+    .def(&quot;__iter__&quot;
+         , range(&amp;std::pair&lt;char*,char*&gt;::first, &amp;std::pair&lt;char*,char*&gt;::second))
+    )
+</pre>
+<dd>
+
+<dt>The ability to specify <a
+href="CallPolicies.html">CallPolicies</a>, e.g. to prevent copying of
+heavyweight values:
+
+<pre>
+    ...
+    .def(&quot;__iter__&quot;, 
+         , range&lt;return_value_policy&lt;copy_non_const_reference&gt; &gt;(
+               &amp;my_sequence&lt;heavy&gt;::begin
+             , &amp;my_sequence&lt;heavy&gt;::end))
+</pre>
+<dd>
+
+</dl>
+
+      <h4><a name="properties">Properties</a></h4>
+
+The Kull iteration interfaces also required the ability to iterate
+over a sequence specified by an instance's attribute:
+<pre>
+&gt;&gt;&gt; f = field()
+&gt;&gt;&gt; for e in f.elements:
+...     print e,
+</pre>
+
+This forced the exposure of the <a
+      href="http://www.python.org/2.2/descrintro.html#property"><code>property</code></a>
+      interface used internally to implement the data member exposure
+      facility described in <a
+      href="Mar2002.html#data_members">March</a>. Properties are an
+      incredibly useful idiom, so it's good to be able to provide them
+      at little new development cost.
+
+      <h4><a name="setattr">setattr</a></h4>
+
+<code>class_&lt;&gt;</code> acquired a <code>setattr</code> member
+function which allows users to easily add new Python objects as class
+attributes.
+
+      <h4><a name="module">__module__ Attribute</a></h4>
+
+Ralf Grosse-Kunstleve has been working on pickling support for v2. To
+make it work correctly, he had to make sure that a class'
+<code>__module__</code> attribute was set correctly.
+
+<h3><a name="back_reference"><code>back_reference</code></a></h3>
+
+The new <code>back_reference&lt;T&gt;</code> template can be used as a
+function parameter when the user needs access to both a <code>T</code>
+argument and to the Python object which manages it. The function will
+only match in the overload resolution process if it would match the
+same function signature with <code>T</code> substituted for
+<code>back_reference&lt;T&gt;</code>. This feature is not yet
+documented.
+
+<h2><a name="documentation">Documentation</a></h2>
+
+In a major effort to prepare Boost.Python v2 to replace v1, many pages
+of new reference documentation were added:
+
+<blockquote>
+
+<dl>
+        <dt><a href="CallPolicies.html">CallPolicies.html</a><dd>
+        <dt><a href="Dereferenceable.html">Dereferenceable.html</a><dd>
+        <dt><a href="Extractor.html">Extractor.html</a><dd>
+        <dt><a href="HolderGenerator.html">HolderGenerator.html</a><dd>
+        <dt><a href="ResultConverter.html">ResultConverter.html</a><dd>
+        <dt><a href="call_method.html">call_method.html</a><dd>
+        <dt><a href="callbacks.html">callbacks.html</a><dd>
+        <dt><a href="data_members.html">data_members.html</a><dd>
+        <dt><a href="has_back_reference.html">has_back_reference.html</a><dd>
+        <dt><a href="implicit.html">implicit.html</a><dd>
+        <dt><a href="instance_holder.html">instance_holder.html</a><dd>
+        <dt><a href="operators.html">operators.html</a><dd>
+        <dt><a href="ptr.html">ptr.html</a><dd>
+        <dt><a href="type_id.html">type_id.html</a><dd>
+        <dt><a href="with_custodian_and_ward.html">with_custodian_and_ward.html</a><dd>
+</dl>
+
+</blockquote>
+Major updates were made to the following pages:
+
+
+<blockquote>
+<dl>
+        <dt><a href="call.html">call.html</a><dd> <dt>updated<dd>
+        <dt><a href="class.html">class.html</a><dd>
+        <dt><a href="reference.html">reference.html</a><dd>
+</dl>
+</blockquote>
+
+         As usual, careful documentation forces one to consider the
+         interface again, and there were many interface changes
+         associated with this effort, including the elevation of the
+         following components from implementation detail to
+         first-class library citizen:
+
+<blockquote>
+<dl>
+        <dt>type_id.hpp<dd>
+        <dt>pointee.hpp<dd>
+        <dt>lvalue_from_pytype.hpp<dd></dl>
+</dl>
+</blockquote>
+
+<h2><a name="misc">Miscellaneous</a></h2>
+
+    <h3><a name="converters">Converters</a></h3>
+
+It appears that the world of C++ &lt;==&gt; Python conversion rules is
+an endlessly-rich area of exploration. Completing the conversions for
+<code>char</code> and <code>char const*</code> types, as described at
+the end of <a href="Apr2002.html#missing">April's report</a>,
+uncovered some interesting new shades to the problem. It turns out to
+be worth distinguishing mutable and immutable lvalue conversions,
+because despite the fact that Python doesn't understand
+<code>const</code>, it does understand immutability (c.f. Python
+strings, which expose an immutable <code>char</code> pointer). It is
+also worth recognizing types which represent lvalue <i>sequences</i>,
+to prevent Python <code>&quot;foobar&quot;</code> from being silently
+truncated to C++ <code>'f'</code>. More details on this insight can be
+found in the mailing list <a
+href="http://mail.python.org/pipermail/c++-sig/2002-May/001023.html">
+archive</a>. I don't plan to do anything about this immediately, but I
+do think it's the right direction to go in the long run.
+
+    <h3><a name="checkins">Checkins Mailing List</a></h3>
+
+In order to better coordinate changes made by multiple developers, I
+enabled <a
+href="http://sourceforge.net/docman/display_doc.php?docid=772&group_id=1">syncmail</a>
+for the Boost.Python CVS trees, and established an associated <a
+href="http://lists.sourceforge.net/lists/listinfo/boost-python-cvs">mailing
+list</a>. Subscribe to this list to receive notices of each new
+checkin.
+
+    <h3><a name="shared">Shared Libraries</a></h3>
+
+Beyond the vagaries of dynamic linking on AIX, I have been
+participating in a more-general discussion of dynamic linking for
+C++. Needless to say, C++ dynamic linking is of critical importance to
+Boost.Python: all extension modules are normally built as shared
+libraries, and Boost.Python extension modules share a common library
+as well. 
+
+In fact, there are at least two separate conversations. One
+in the C++ standard extensions mailing list concerns what can be
+standardized for C++ and shared libraries; the other, mostly on the <a
+href="http://gcc.gnu.org/ml/gcc/">gcc</a> mailing list, concerns the
+behavior of GCC on Posix/ELF platforms. 
+
+Some of the GCC threads are here:
+
+<blockquote>
+<a
+href="http://gcc.gnu.org/ml/gcc/2002-05/msg02002.html">http://gcc.gnu.org/ml/gcc/2002-05/msg02002.html</a><br>
+<a
+href="http://gcc.gnu.org/ml/gcc/2002-05/msg02945.html">http://gcc.gnu.org/ml/gcc/2002-05/msg02945.html</a><br>
+<a href="http://gcc.gnu.org/ml/gcc/2002-05/msg01758.html">http://gcc.gnu.org/ml/gcc/2002-05/msg01758.html</a>
+</blockquote>
+
+  <h2><a name="next">What's Next</a></h2>
+
+Development is focused on what's needed to be able to retire
+Boost.Python v1. At the moment, that means deciding the user-friendly
+interfaces for to_/from_python conversion, and formally exposing the
+Python object smart pointers and object wrapper classes. Quite a few
+questions have also been showing up recently about how to embed Python
+with Boost.Python, and how to link with it statically; the solutions
+to these issues will probably have to be formalized before long.
+
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+<p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 
+  2002. </i></p>
+</body>
+</html>

doc/v2/ObjectWrapper.html

@@ -0,0 +1,153 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - ObjectWrapper Concept</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">ObjectWrapper and TypeWrapper Concepts</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#concept-requirements">Concept Requirements</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#ObjectWrapper-concept">ObjectWrapper Concept</a></dt>
+
+          <dt><a href="#TypeWrapper-concept">TypeWrapper Concept</a></dt>
+        </dl>
+      </dd>
+
+      <dt><a href="#caveat">Caveat</a></dt>
+    </dl>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p>This page defines two concepts used to describe classes which manage a
+    Python objects, and which are intended to support usage with a
+    Python-like syntax.</p>
+
+    <h2><a name="concept-requirements"></a>Concept Requirements</h2>
+
+    <h3><a name="ObjectWrapper-concept"></a>ObjectWrapper Concept</h3>
+    Models of the ObjectWrapper concept have <a href=
+    "object.html#object-spec">object</a> as a publicly-accessible base class,
+    and are used to supply special construction behavior and/or additional
+    convenient functionality through (often templated) member functions.
+    Except when the return type <code>R</code> is itself an <a href=
+    "#TypeWrapper-concept">TypeWrapper</a>, a member function invocation of
+    the form 
+<pre>
+x.<i>some_function</i>(<i>a<small>1</small>, a<small>2</small>,...a<small>n</small></i>)
+</pre>
+    always has semantics equivalent to: 
+<pre>
+<a href=
+"extract.html#extract-spec">extract</a>&lt;R&gt;(x.attr("<i>some_function</i>")(<a
+ href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>1</small></i>), <a
+href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>2</small></i>),...<a
+href="object.html#object-spec-ctors">object</a>(<i>a<small>n</small></i>)))()
+</pre>
+    When the <code>R</code> is an <a href=
+    "#TypeWrapper-concept">TypeWrapper</a>, the result type may be
+    constructed by taking direct posession of: 
+<pre>
+x.attr("<i>some_function</i>")(<a href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>1</small></i>), <a
+ href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>2</small></i>),...<a
+ href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>n</small></i>)).ptr()
+</pre>
+    [see <a href="#caveat">caveat</a> below] 
+
+    <h3><a name="TypeWrapper-concept"></a>TypeWrapper Concept</h3>
+    TypeWrapper is a refinement of ObjectWrapper which is associated with a
+    particular Python type <code>X</code>. For a given TypeWrapper
+    <code>T</code>, a valid constructor expression 
+<pre>
+T(<i>a<small>1</small>, a<small>2</small>,...a<small>n</small></i>)
+</pre>
+    builds a new <code>T</code> object managing the result of invoking
+    <code>X</code> with arguments corresponding to 
+<pre>
+<a href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>1</small></i>), <a
+ href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>2</small></i>),...<a
+ href=
+"object.html#object-spec-ctors">object</a>(<i>a<small>n</small></i>)
+</pre>
+
+When used as arguments to wrapped C++ functions, or as the template
+parameter to <code><a
+href="extract.html#extract-spec">extract</a>&lt;&gt;</code>, only
+instances of the associated Python type will be considered a match.
+
+    <h3><a name="caveat">Caveat</a></h3>
+    The upshot of the special member function invocation rules when the
+    return type is a TypeWrapper is that it is possible for the returned
+    object to manage a Python object of an inappropriate type. This is not
+    usually a serious problem; the worst-case result is that errors will be
+    detected at runtime a little later than they might otherwise be. For an
+    example of how this can occur, note that the <code><a href=
+    "dict.html#dict-spec">dict</a></code> member function <code>items</code>
+    returns an object of type <code><a href=
+    "list.html#list-spec">list</a></code>. Now suppose the user defines this
+    <code>dict</code> subclass in Python: 
+<pre>
+&gt;&gt;&gt; class mydict(dict):
+...     def items(self):
+...         return tuple(dict.items(self)) # return a tuple
+</pre>
+    Since an instance of <code>mydict</code> is also an instance of
+    <code>dict</code>, when used as an argument to a wrapped C++ function,
+    <code><a href="dict.html#dict-spec">boost::python::dict</a></code> can
+    accept objects of Python type <code>mydict</code>. Invoking
+    <code>items()</code> on this object can result in an instance of <code><a
+    href="list.html#list-spec">boost::python::list</a></code> which actually
+    holds a Python tuple. Subsequent attempts to use list methods (e.g.
+    <code>append</code>, or any other mutating operation) on this object will
+    raise the same exception that would occur if you tried to do it from
+    Python. 
+    <hr>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/ResultConverter.html

@@ -0,0 +1,124 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../../../../boost.css">
+<title>Boost.Python - ResultConverter Concept</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+      <h3><a href="../../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">ResultConverter Concept</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<dl class="page-index"> 
+  <dt><a href="#introduction">Introduction</a></dt>
+  <dt><a href="#concept-requirements">Concept Requirements</a></dt>
+  <dd>
+    <dl class="page-index"> 
+      <dt><a href="#ResultConverter-concept">ResultConverter Concept</a></dt>
+      <dt><a href="#ResultConverterGenerator-concept">ResultConverterGenerator Concept</a></dt>
+    </dl>
+  </dd>
+</dl>
+
+<h2><a name="introduction"></a>Introduction</h2>
+
+<p>A ResultConverter for a type <code>T</code> is a type whose
+instances can be used to convert C++ return values of type
+<code>T</code> <code>to_python</code>. A ResultConverterGenerator is
+an MPL unary metafunction class which, given the return type of a C++
+function, returns a ResultConverter for that type. ResultConverters in
+Boost.Python generally inspect library's registry of converters to
+find a suitable converter, but converters which don't use the registry
+are also possible.
+
+<h2><a name="concept-requirements"></a>Concept Requirements</h2>
+<h3><a name="ResultConverter-concept"></a>ResultConverter Concept</h3>
+
+<p>In the table below, <code><b>C</b></code> denotes a ResultConverter
+type for a type <b><code>R</code></b> , <code><b>c</b></code> denotes
+an object of type <code><b>C</b></code> , and <code><b>r</b></code>
+denotes an object of type <code><b>R</b></code>.
+
+<table summary="ResultConverter expressions" border="1" cellpadding="5">
+
+  <tr> 
+    <td><b>Expression</b></td>
+    <td><b>Type</b></td>
+    <td><b>Semantics</b></td>
+  </tr>
+
+  <tr> 
+    <td valign="top"><code>C c;</code></td>
+    <td>
+    <td>Constructs a <code>C</code> object.
+  </tr>
+
+  <tr> 
+    <td valign="top"><code>c.convertible()</code></td>
+    <td>convertible to <code>bool</code></td>
+    <td><code>false</code> iff no conversion from any <code>R</code> value
+    to a Python object is possible.</td>
+  </tr>
+
+  <tr> 
+    <td valign="top"><code>c(r)</code></td>
+    <td>convertible to <code>PyObject*</code></td>
+    <td>A pointer to a Python object corresponding to <code>r</code>,
+    or <code>0</code> iff <code>r</code> could not be converted
+    <code>to_python</code>, in which case <a
+    href="http://www.python.org/doc/current/api/exceptionHandling.html#l2h-71">PyErr_Occurred</a>
+    should return non-zero.</td>
+  </tr>
+  <tr> 
+    <td valign="top"><code>c.get_pytype()</code></td>
+    <td><code>PyTypeObject const*</code></td>
+    <td>A pointer to a Python Type object corresponding to result of the conversion,
+    or <code>0</code>. Used for documentation generation. If <code>0</code> is returned
+    the generated type in the documentation will be <b>object</b> .</td>
+  </tr>
+</table>
+
+<h3><a name="ResultConverterGenerator-concept"></a>ResultConverterGenerator Concept</h3>
+<p>In the table below, <code><b>G</b></code> denotes a
+ResultConverterGenerator type and <code><b>R</b></code> denotes a possible
+C++ function return type.
+
+<table summary="ResultConverterGenerator expressions" border="1" cellpadding="5">
+  <tr> 
+    <td><b>Expression</b></td>
+    <td><b>Requirements</b></td>
+  </tr>
+  <tr> 
+    <td valign="top"><code>G::apply&lt;R&gt;::type</code></td>
+    <td>A ResultConverter type for <code>R</code>.</td>
+</table>
+
+<hr>
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  09 May, 2002    <!--Luann's birthday! -->
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+    <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+    Abrahams</a> 2002. </i>
+
+<p>Permission to copy, use, modify, sell
+ and distribute this software is granted provided this copyright notice appears
+ in all copies. This software is provided "as is" without express or implied
+ warranty, and with no claim as to its suitability for any purpose.
+</body>
+</html>

doc/v2/acknowledgments.html

@@ -0,0 +1,135 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - Acknowledgments</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Acknowledgments</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <p><a href="http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> is
+    the architect, designer, and implementor of <b>Boost.Python</b>.</p>
+
+    <p><a href="mailto:brett.calcott@paradise.net.nz">Brett Calcott</a>
+    contributed and maintains the Visual Studio project files and
+    documentation.</p>
+
+    <p><a href="mailto:Gottfried.Ganssauge-at-haufe.de">Gottfried
+    Ganßauge</a> supplied support for opaque pointer conversions,
+    complete with documentation and a regression test (and I didn't
+    even have to ask him for those)!
+
+    <p>Joel de Guzman implemented the <a href="overloads.html">default
+    argument support</a> and wrote the excellent <a href=
+    "../tutorial/index.html">tutorial documentation</a>.</p>
+
+    <p><a href="http://www.boost.org/people/ralf_w_grosse_kunstleve.htm">Ralf W.
+    Grosse-Kunstleve</a> implemented the <a href="pickle.html">pickle
+    support</a>, and has enthusiastically supported the library since its
+    birth, contributing to design decisions and providing invaluable
+    real-world insight into user requirements. Ralf has written some <a href=
+    "faq.html#question2">extensions</a> for converting C++ containers that I
+    hope will be incorporated into the library soon. He also implemented the
+    cross-module support in the first version of Boost.Python. More
+    importantly, Ralf makes sure nobody forgets the near-perfect synergy of
+    C++ and Python for solving the problems of large-scale software
+    construction.</p>
+
+    <p><a href="http://www.boost.org/people/aleksey_gurtovoy.htm">Aleksey Gurtovoy</a>
+    wrote an incredible C++ <a href="http://www.mywikinet.com/mpl">Template
+    Metaprogramming Library</a> which allows Boost.Python to perform much of
+    its compile-time magic. In addition, Aleksey very generously contributed
+    his time and deep knowledge of the quirks of various buggy compilers to
+    help us get around problems at crucial moments.</p>
+
+    <p><a href="http://www.boost.org/people/paul_mensonides.htm">Paul Mensonides</a>,
+    building on the work <a href="http://www.boost.org/people/vesa_karvonen.htm">Vesa
+    Karvonen</a>, wrote a similarly amazing <a href=
+    "../../../preprocessor/doc/index.html">Preprocessor Metaprogramming
+    Library</a>, and generously contributed the time and expertise to get it
+    working in the Boost.Python library, rewriting much of Boost.Python to
+    use the new preproccessor metaprogramming constructs and helping us to
+    work around buggy and slow C++ preprocessors.</p>
+
+    <p><a href="mailto:nicodemus-at-globalite.com.br">Bruno da Silva de
+    Oliveira</a> contributed the ingenious <a
+    href="../../pyste/index.html">Pyste</a> (&quot;Pie-Steh&quot;)
+    code generator.
+
+    <p><a href="mailto:nickm@sitius.com">Nikolay Mladenov</a> contributed
+    <code>staticmethod</code> support.</p>
+
+    <p>Martin Casado solved some sticky problems which allow us to build the
+    Boost.Python shared library for AIX's crazy dynamic linking model.</p>
+
+    <p><a href="mailto:achim@procoders.net">Achim Domma</a> contributed some
+    of the <a href="reference.html#object_wrappers">Object Wrappers</a> and
+    HTML templates for this documentation. Dave Hawkes contributed
+    inspiration for the use of the <code><a href=
+    "scope.html#scope-spec">scope</a></code> class to simplify module
+    definition syntax. Pearu Pearson wrote some of the test cases that are in
+    the current test suite.</p>
+
+    <p>The development of this version of Boost.Python was funded in part by
+    the <a href="http://www.llnl.gov/">Lawrence Livermore National
+    Laboratories</a> and by the <a href="http://cci.lbl.gov/">Computational
+    Crystallography Initiative</a> at Lawrence Berkeley National
+    Laboratories.</p>
+
+    <p><a href="http://kogs-www.informatik.uni-hamburg.de/~koethe/">Ullrich
+    Koethe</a> had independently developed a similar system. When he
+    discovered Boost.Python v1, he generously contributed countless hours of
+    coding and much insight into improving it. He is responsible for an early
+    version of the support for function overloading and wrote the support for
+    reflecting C++ inheritance relationships. He has helped to improve
+    error-reporting from both Python and C++ (we hope to do as well in v2
+    again soon), and has designed the original support for exposing numeric
+    operators, including a way to avoid explicit coercion by means of
+    overloading.</p>
+
+    <p>The members of the boost mailing list and the Python community
+    supplied invaluable early feedback. In particular, Ron Clarke, Mark
+    Evans, Anton Gluck, Chuck Ingold, Prabhu Ramachandran, and Barry Scott
+    took the brave step of trying to use Boost.Python while it was still in
+    early stages of development.</p>
+
+    <p>The first version of Boost.Python would not have been possible without
+    the support of Dragon Systems, which supported its development and
+    release as a Boost library.</p>
+    <hr>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     26 November, 2002 
+    <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/args.html

@@ -0,0 +1,199 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Cygwin (vers 1st April 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/args.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;boost/python/args.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#keyword-expression"><i>keyword-expressions</i></a></dt>
+
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#arg-spec">class <code>arg</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#arg-synopsis">class <code>arg</code>
+              synopsis</a></dt>
+
+              <dt><a href="#arg-ctor">class <code>arg</code>
+              constructor</a></dt>
+
+              <dt><a href="#arg-operator">class <code>arg</code> template
+              <code>operator =</code></a></dt>
+            </dl>
+          </dd>
+        </dl>
+      </dd>
+
+      <dt><a href="#keyword-expression-operators"><i>Keyword-expression</i>
+      operator <code>,</code></a></dt>
+
+      <dt><a href="#functions">Functions (deprecated)</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><code><a href=
+          "#args-spec">args</a>(</code>...<code>)</code></dt>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example(s)</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p>Supplies a family of overloaded functions for specifying argument
+    keywords for wrapped C++ functions.</p>
+
+    <h2><a name="keyword-expression"></a><i>keyword-expressions</i></h2>
+
+    <p>A <b>keyword-expression</b> results in an object which holds a
+    sequence of <a href="definitions.html#ntbs">ntbs</a>es, and whose type
+    encodes the number of keywords specified. The <b>keyword-expression</b>
+    may contain default values for some or all of the keywords it holds</p>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="arg-spec"></a><code>class arg;</code></h3>
+
+    <p>The objects of class arg are keyword-expressions holding one keyword (
+    size one )</p>
+
+    <h4><a name="arg-synopsis"></a>Class <code>arg</code> synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+        struct arg 
+        {
+          template &lt;class T&gt;
+                  arg &amp;perator = (T const &amp;value);
+          explicit arg (char const *name){elements[0].name = name;}
+        };
+
+}}
+</pre>
+
+    <h4><a name="arg-ctor"></a>Class <code>arg</code> constructor</h4>
+<pre>
+arg(char const* name);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> The argument must be a <a href=
+      "definitions.html#ntbs">ntbs</a>.</dt>
+
+      <dt><b>Effects:</b> Constructs an <code>arg</code> object holding a
+      keyword with name <code>name</code>.</dt>
+    </dl>
+
+    <h4><a name="arg-operator"></a>Class <code>arg</code> operator =</h4>
+<pre>
+template &lt;class T&gt; arg &amp;operator = (T const &amp;value);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> The argument must convertible to python.</dt>
+
+      <dt><b>Effects:</b> Assigns default value for the keyword.</dt>
+
+      <dt><b>Returns:</b> Reference to <code>this</code>.</dt>
+    </dl>
+
+    <h2><a name="keyword-expression-operators"><i>Keyword-expression</i>
+    operator <code>,</code></a></h2>
+<pre>
+      <i>keyword-expression</i> operator , (<i>keyword-expression</i>, const arg &amp;kw) const
+      <i>keyword-expression</i> operator , (<i>keyword-expression</i>, const char *name) const;
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> The argument <code>name</code> must be a <a href=
+      "definitions.html#ntbs">ntbs</a>.</dt>
+
+      <dt><b>Effects:</b> Extends the <i>keyword-expression</i> argument with
+      one more keyword.</dt>
+
+      <dt><b>Returns:</b> The extended <i>keyword-expression</i>.</dt>
+    </dl>
+
+    <h2><font color="#7F7F7F"><a name="functions"></a>Functions
+    (deprecated)</font></h2>
+
+    <h3><a name="args-spec"></a><code><font color=
+    "#7F7F7F">args</font>(</code>...<code>)</code></h3>
+<pre>
+<font color="#7F7F7F">  <i>unspecified1</i> args(char const*);
+    <i>unspecified2</i> args(char const*, char const*);
+       .
+       .
+       .
+    <i>unspecifiedN</i> args(char const*, char const*, ... char const*);
+</font>
+</pre>
+
+    <dl class="function-semantics">
+      <dt><font color="#7F7F7F"><b>Requires:</b> Every argument must be a <a
+      href="definitions.html#ntbs">ntbs</a>.</font></dt>
+
+      <dt><font color="#7F7F7F"><b>Returns:</b> an object representing a <a
+      href="#keyword-expression"><i>keyword-expression</i></a> encapsulating
+      the arguments passed.</font></dt>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+<pre>
+#include &lt;boost/python/def.hpp&gt;
+using namespace boost::python;
+
+int f(double x, double y, double z=0.0, double w=1.0);
+
+BOOST_PYTHON_MODULE(xxx)
+{
+   def("f", f
+            , ( arg("x"), "y", arg("z")=0.0, arg("w")=1.0 ) 
+            );
+}
+</pre>
+
+    <p>Revised 01 August, 2003</p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002-2003.</i></p>
+  </body>
+</html>
+

doc/v2/call.html

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+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<link rel="stylesheet" type="text/css" href="../boost.css">
+<title>Boost.Python - &lt;call.hpp&gt;</title>
+</head>
+<body link="#0000ff" vlink="#800080">
+<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+  <tr> 
+    <td valign="top" width="300"> 
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+    </td>
+    <td valign="top"> 
+      <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+      <h2 align="center">Header &lt;call.hpp&gt;</h2>
+    </td>
+  </tr>
+</table>
+<hr>
+<h2>Contents</h2>
+<dl class="page-index"> 
+  <dt><a href="#introduction">Introduction</a></dt>
+  <dt><a href="#functions">Functions</a></dt>
+  <dl class="page-index">
+    <dt><a href="#call-spec">call</a></dt>
+  </dl>
+
+  <dt><a href="#examples">Example(s)</a></dt>
+
+</dl>
+<hr>
+<h2><a name="introduction"></a>Introduction</h2>
+<p>
+  <code>&lt;boost/python/call.hpp&gt;</code> defines the <a
+  href="#call-spec"><code>call</code></a> family of overloaded function
+  templates, used to invoke Python callable objects from C++.
+
+<h2><a name="functions"></a>Functions</h2>
+<pre>
+<a name="call-spec">template &lt;class R, class A1, class A2, ... class A<i>n</i>&gt;</a>
+R call(PyObject* callable, A1 const&amp;, A2 const&amp;, ... A<i>n</i> const&amp;)
+</pre>
+<dl class="function-semantics"> 
+  <dt><b>Requires:</b> <code>R</code> is a pointer type, reference
+  type, or a complete type with an accessible copy constructor</dt>
+
+  <dt><b>Effects:</b> Invokes <code>callable(a1,&nbsp;a2,&nbsp;...a<i>n</i>)</code> in
+  Python, where <code>a1</code>...<code>a<i>n</i></code> are the arguments to
+  <code>call()</code>, converted to Python objects.
+  <dt><b>Returns:</b> The result of the Python call, converted to the C++ type <code>R</code>.</dt>
+
+</dt>
+  <dt><b>Rationale:</b> For a complete semantic description and
+  rationale, see <a href="callbacks.html">this page</a>.
+</dt>
+</dl>
+
+<h2><a name="examples"></a>Example(s)</h2>
+
+The following C++ function applies a Python callable object to its two
+arguments and returns the result. If a Python exception is raised or
+the result can't be converted to a <code>double</code>, an exception
+is thrown.
+
+<pre>
+double apply2(PyObject* func, double x, double y)
+{
+   return boost::python::call&lt;double&gt;(func, x, y);
+}
+</pre>
+
+<p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  9 May, 2002 <!-- Luann's birthday! -->
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+</p>
+<p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 
+  2002. </i></p>
+</body>
+</html>

doc/v2/call_method.html

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+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;call_method.hpp&gt;</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;call_method.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#functions">Functions</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#call_method-spec">call_method</a></dt>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example(s)</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><code>&lt;boost/python/call_method.hpp&gt;</code> defines the <a href=
+    "#call_method-spec"><code>call_method</code></a> family of overloaded
+    function templates, used to invoke callable attributes of Python objects
+    from C++.</p>
+
+    <h2><a name="functions"></a>Functions</h2>
+<pre>
+<a name=
+"call_method-spec">template &lt;class R, class A1, class A2, ... class A<i>n</i>&gt;</a>
+R call_method(PyObject* self, char const* method, A1 const&amp;, A2 const&amp;, ... A<i>n</i> const&amp;)
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> <code>R</code> is a pointer type, reference type,
+      or a complete type with an accessible copy constructor</dt>
+
+      <dt><b>Effects:</b> Invokes
+      <code>self.<i>method</i>(a1,&nbsp;a2,&nbsp;...a<i>n</i>)</code> in
+      Python, where <code>a1</code>...<code>a<i>n</i></code> are the
+      arguments to <code>call_method()</code>, converted to Python objects.
+      For a complete semantic description, see <a href="callbacks.html">this
+      page</a>.</dt>
+
+      <dt><b>Returns:</b> The result of the Python call, converted to the C++
+      type <code>R</code>.</dt>
+
+      <dt><b>Rationale:</b> <code>call_method</code> is critical to
+      implementing C++ virtual functions which are overridable in Python, as
+      shown by the example below.</dt>
+    </dl>
+
+    <h2><a name="examples"></a>Example(s)</h2>
+    The following C++ illustrates the use of <code>call_method</code> in
+    wrapping a class with a virtual function that can be overridden in
+    Python: 
+
+    <h3>C++ Module Definition</h3>
+<pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/class.hpp&gt;
+#include &lt;boost/utility.hpp&gt;
+#include &lt;cstring&gt;
+
+// class to be wrapped
+class Base
+{
+ public:
+   virtual char const* class_name() const { return "Base"; }
+   virtual ~Base();
+};
+
+bool is_base(Base* b)
+{
+   return !std::strcmp(b-&gt;class_name(), "Base");
+}
+
+// Wrapper code begins here
+using namespace boost::python;
+
+// Callback class
+class Base_callback : public Base
+{
+ public:
+   Base_callback(PyObject* self) : m_self(self) {}
+
+   char const* class_name() const { return <b>call_method</b>&lt;char const*&gt;(m_self, "class_name"); }
+   char const* Base_name() const { return Base::class_name(); }
+ private:
+   PyObject* const m_self;
+};
+
+using namespace boost::python;
+BOOST_PYTHON_MODULE(my_module)
+{
+    def("is_base", is_base);
+
+    class_&lt;Base,Base_callback, noncopyable&gt;("Base")
+        .def("class_name", &amp;Base_callback::Base_name)
+        ;
+
+}
+</pre>
+
+    <h3>Python Code</h3>
+<pre>
+&gt;&gt;&gt; from my_module import *
+&gt;&gt;&gt; class Derived(Base):
+...    def __init__(self):
+...       Base.__init__(self)
+...    def class_name(self):
+...       return self.__class__.__name__
+...
+&gt;&gt;&gt; is_base(Base()) # calls the class_name() method from C++
+1
+&gt;&gt;&gt; is_base(Derived())
+0
+</pre>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/callbacks.html

@@ -0,0 +1,254 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - Calling Python Functions and Methods</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Calling Python Functions and Methods</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#argument_handling">Argument Handling</a></dt>
+
+      <dt><a href="#result_handling">Result Handling</a></dt>
+
+      <dt><a href="#result_handling">Rationale</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction">Introduction</a></h2>
+    The simplest way to call a Python function from C++, given an <code><a
+    href="object.html#object-spec">object</a></code> instance <code>f</code>
+    holding the function, is simply to invoke its function call operator. 
+<pre>
+f("tea", 4, 2) // In Python: f('tea', 4, 2)
+</pre>
+    And of course, a method of an <code><a href=
+    "object.html#object-spec">object</a></code> instance <code>x</code> can
+    be invoked by using the function-call operator of the corresponding
+    attribute: 
+<pre>
+x.attr("tea")(4, 2); // In Python: x.tea(4, 2)
+</pre>
+
+    <p>If you don't have an <code>object</code> instance, Boost.Python
+    provides two families of function templates, <code><a href=
+    "call.html#call-spec">call</a></code> and <code><a href=
+    "call_method.html#call_method-spec">call_method</a></code>, for invoking
+    Python functions and methods respectively on <code>PyObject*</code>s. The
+    interface for calling a Python function object (or any Python callable
+    object) looks like:</p>
+<pre>
+call&lt;ResultType&gt;(callable_object, a1, a2... a<i>N</i>);
+</pre>
+    Calling a method of a Python object is similarly easy: 
+<pre>
+call_method&lt;ResultType&gt;(self_object, "<i>method-name</i>", a1, a2... a<i>N</i>);
+</pre>
+    This comparitively low-level interface is the one you'll use when
+    implementing C++ virtual functions that can be overridden in Python. 
+
+    <h2><a name="argument_handling">Argument Handling</a></h2>
+
+    <p>Arguments are converted to Python according to their type. By default,
+    the arguments <code>a1</code>...<code>a<i>N</i></code> are copied into
+    new Python objects, but this behavior can be overridden by the use of
+    <code><a href="ptr.html#ptr-spec">ptr()</a></code> and <a href=
+    "../../../bind/ref.html">ref()</a>:</p>
+<pre>
+class X : boost::noncopyable
+{
+   ...
+};
+
+void apply(PyObject* callable, X&amp; x)
+{
+   // Invoke callable, passing a Python object which holds a reference to x
+   boost::python::call&lt;void&gt;(callable, boost::ref(x));
+}
+</pre>
+    In the table below, <code><b>x</b></code> denotes the actual argument
+    object and <code><b>cv</b></code> denotes an optional
+    <i>cv-qualification</i>: "<code>const</code>", "<code>volatile</code>",
+    or "<code>const volatile</code>". 
+
+    <table border="1" summary="class_ template parameters">
+      <tr>
+        <th>Argument Type</th>
+
+        <th>Behavior</th>
+      </tr>
+
+      <tr>
+        <td><code>T cv&amp;</code><br>
+         <code>T cv</code></td>
+
+        <td>The Python argument is created by the same means used for the
+        return value of a wrapped C++ function returning <code>T</code>. When
+        <code>T</code> is a class type, that normally means <code>*x</code>
+        is copy-constructed into the new Python object.</td>
+      </tr>
+
+      <tr>
+        <td><code>T*</code></td>
+
+        <td>If <code>x&nbsp;==&nbsp;0</code>, the Python argument will be
+        <code><a href=
+        "http://www.python.org/doc/current/lib/bltin-null-object.html">None</a></code>.
+        Otherwise, the Python argument is created by the same means used for
+        the return value of a wrapped C++ function returning <code>T</code>.
+        When <code>T</code> is a class type, that normally means
+        <code>*x</code> is copy-constructed into the new Python object.</td>
+      </tr>
+
+      <tr>
+        <td><code><a href=
+        "../../../bind/ref.html">boost::reference_wrapper</a>&lt;T&gt;</code></td>
+
+        <td>The Python argument contains a pointer to, rather than a copy of,
+        <code>x.get()</code>. Note: failure to ensure that no Python code
+        holds a reference to the resulting object beyond the lifetime of
+        <code>*x.get()</code> <b>may result in a crash!</b></td>
+      </tr>
+
+      <tr>
+        <td><code><a href=
+        "ptr.html#pointer_wrapper-spec">pointer_wrapper</a>&lt;T&gt;</code></td>
+
+        <td>If <code>x.get()&nbsp;==&nbsp;0</code>, the Python argument will
+        be <code><a href=
+        "http://www.python.org/doc/current/lib/bltin-null-object.html">None</a></code>.
+        Otherwise, the Python argument contains a pointer to, rather than a
+        copy of, <code>*x.get()</code>. Note: failure to ensure that no
+        Python code holds a reference to the resulting object beyond the
+        lifetime of <code>*x.get()</code> <b>may result in a crash!</b></td>
+      </tr>
+    </table>
+
+    <h2><a name="result_handling">Result Handling</a></h2>
+    In general, <code>call&lt;ResultType&gt;()</code> and
+    <code>call_method&lt;ResultType&gt;()</code> return
+    <code>ResultType</code> by exploiting all lvalue and rvalue
+    <code>from_python</code> converters registered for ResultType and
+    returning a copy of the result. However, when <code>ResultType</code> is
+    a pointer or reference type, Boost.Python searches only for lvalue
+    converters. To prevent dangling pointers and references, an exception
+    will be thrown if the Python result object has only a single reference
+    count. 
+
+    <h2><a name="rationale">Rationale</a></h2>
+    In general, to get Python arguments corresponding to
+    <code>a1</code>...<code>a<i>N</i></code>, a new Python object must be
+    created for each one; should the C++ object be copied into that Python
+    object, or should the Python object simply hold a reference/pointer to
+    the C++ object? In general, the latter approach is unsafe, since the
+    called function may store a reference to the Python object somewhere. If
+    the Python object is used after the C++ object is destroyed, we'll crash
+    Python. 
+
+    <p>In keeping with the philosophy that users on the Python side shouldn't
+    have to worry about crashing the interpreter, the default behavior is to
+    copy the C++ object, and to allow a non-copying behavior only if the user
+    writes <code><a href="../../../bind/ref.html">boost::ref</a>(a1)</code>
+    instead of a1 directly. At least this way, the user doesn't get dangerous
+    behavior "by accident". It's also worth noting that the non-copying
+    ("by-reference") behavior is in general only available for class types,
+    and will fail at runtime with a Python exception if used otherwise[<a
+    href="#1">1</a>].</p>
+
+    <p>However, pointer types present a problem: one approach is to refuse to
+    compile if any aN has pointer type: after all, a user can always pass
+    <code>*aN</code> to pass "by-value" or <code>ref(*aN)</code> to indicate
+    a pass-by-reference behavior. However, this creates a problem for the
+    expected null pointer to <code>None</code> conversion: it's illegal to
+    dereference a null pointer value.</p>
+
+    <p>The compromise I've settled on is this:</p>
+
+    <ol>
+      <li>The default behavior is pass-by-value. If you pass a non-null
+      pointer, the pointee is copied into a new Python object; otherwise the
+      corresponding Python argument will be None.</li>
+
+      <li>if you want by-reference behavior, use <code>ptr(aN)</code> if
+      <code>aN</code> is a pointer and <code>ref(aN)</code> otherwise. If a
+      null pointer is passed to <code>ptr(aN)</code>, the corresponding
+      Python argument will be <code>None</code>.</li>
+    </ol>
+
+    <p>As for results, we have a similar problem: if <code>ResultType</code>
+    is allowed to be a pointer or reference type, the lifetime of the object
+    it refers to is probably being managed by a Python object. When that
+    Python object is destroyed, our pointer dangles. The problem is
+    particularly bad when the <code>ResultType</code> is char const* - the
+    corresponding Python String object is typically uniquely-referenced,
+    meaning that the pointer dangles as soon as <code>call&lt;char
+    const*&gt;(...)</code> returns.</p>
+
+    <p>The old Boost.Python v1 deals with this issue by refusing to compile
+    any uses of <code>call&lt;char const*&gt;()</code>, but this goes both
+    too far and not far enough. It goes too far because there are cases where
+    the owning Python string object survives beyond the call (just for
+    instance, when it's the name of a Python class), and it goes not far
+    enough because we might just as well have the same problem with a
+    returned pointer or reference of any other type.</p>
+
+    <p>In Boost.Python v2 this is dealt with by:</p>
+
+    <ol>
+      <li>lifting the compile-time restriction on const char* callback
+      returns</li>
+
+      <li>detecting the case when the reference count on the result Python
+      object is 1 and throwing an exception inside of
+      <code>call&lt;U&gt;(...)</code> when <code>U</code> is a pointer or
+      reference type.</li>
+    </ol>
+    This should be acceptably safe because users have to explicitly specify a
+    pointer/reference for <code>U</code> in <code>call&lt;U&gt;</code>, and
+    they will be protected against dangles at runtime, at least long enough
+    to get out of the <code>call&lt;U&gt;(...)</code> invocation. 
+    <hr>
+    <a name="1">[1]</a> It would be possible to make it fail at compile-time
+    for non-class types such as int and char, but I'm not sure it's a good
+    idea to impose this restriction yet. 
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/callbacks.txt

@@ -0,0 +1,92 @@
+.. Copyright David Abrahams 2006. Distributed under the Boost
+.. Software License, Version 1.0. (See accompanying
+.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+Here's the plan:
+
+I aim to provide an interface similar to that of Boost.Python v1's
+callback<>::call(...) for dealing with callbacks. The interface will
+look like:
+
+    returning<ResultType>::call("method_name", self_object, a1, a2...);
+
+or
+
+    returning<ResultType>::call(callable_object, a1, a2...);
+
+ARGUMENT HANDLING
+
+There is an issue concerning how to make Python objects from the
+arguments a1...aN. A new Python object must be created; should the C++
+object be copied into that Python object, or should the Python object
+simply hold a reference/pointer to the C++ object? In general, the
+latter approach is unsafe, since the called function may store a
+reference to the Python object somewhere. If the Python object is used
+after the C++ object is destroyed, we'll crash Python.
+
+I plan to make the copying behavior the default, and to allow a
+non-copying behavior if the user writes boost::ref(a1) instead of a1
+directly. At least this way, the user doesn't get dangerous behavior "by
+accident". It's also worth noting that the non-copying ("by-reference")
+behavior is in general only available for class types, and will fail at
+runtime with a Python exception if used otherwise**
+
+However, pointer types present a problem: My first thought is to refuse
+to compile if any aN has pointer type: after all, a user can always pass
+*aN to pass "by-value" or ref(*aN) to indicate a pass-by-reference
+behavior. However, this creates a problem for the expected NULL pointer
+=> None conversion: it's illegal to dereference a null pointer value.
+
+We could use another construct, say "ptr(aN)", to deal with null
+pointers, but then what does it mean? We know what it does when aN is
+NULL, but it might either have by-value or by-reference behavior when aN
+is non-null.
+
+The compromise I've settled on is this: 
+
+1. The default behavior is pass-by-value. If you pass a non-null
+   pointer, the pointee is copied into a new Python object; otherwise
+   the corresponding Python argument will be None.
+
+2. if you want by-reference behavior, use ptr(aN) if aN is a pointer
+   and ref(aN) otherwise. If a null pointer is passed to ptr(aN), the
+   corresponding Python argument will be None.
+
+RESULT HANDLING
+
+As for results, we have a similar problem: if ResultType is allowed to
+be a pointer or reference type, the lifetime of the object it refers to
+is probably being managed by a Python object. When that Python object is
+destroyed, our pointer dangles. The problem is particularly bad when the
+ResultType is char const* - the corresponding Python String object is
+typically uniquely-referenced, meaning that the pointer dangles as soon
+as returning<char const*>::call() returns.
+
+Boost.Python v1 deals with this issue by refusing to compile any uses of
+callback<char const*>::call(), but IMO this goes both too far and not
+far enough. It goes too far because there are cases where the owning
+String object survives beyond the call (just for instance when it's the
+name of a Python class), and it goes not far enough because we might
+just as well have the same problem with any returned pointer or
+reference.
+
+I propose to address this in Boost.Python v2 by
+
+    1. lifting the compile-time restriction on const
+    char* callback returns
+
+    2. detecting the case when the reference count on the
+    result Python object is 1 and throwing an exception
+    inside of returning<U>::call() when U is a pointer or
+    reference type.
+
+I think this is acceptably safe because users have to explicitly specify
+a pointer/reference for U in returning<U>, and they will be protected
+against dangles at runtime, at least long enough to get out of the
+returning<U>::call() invocation.
+
+-Dave
+
+**It would be possible to make it fail at compile-time for non-class
+types such as int and char, but I'm not sure it's a good idea to impose
+this restriction yet.

doc/v2/class.html

@@ -0,0 +1,790 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+  <meta name="generator" content=
+  "HTML Tidy for Cygwin (vers 1st September 2004), see www.w3.org">
+  <meta http-equiv="Content-Type" content="text/html; charset=iso-latin-1-dos">
+  <link rel="stylesheet" type="text/css" href="../boost.css">
+
+  <title>Boost.Python - &lt;boost/python/class.hpp&gt;,
+  &lt;boost/python/class_fwd.hpp&gt;</title>
+</head>
+
+<body link="#0000FF" vlink="#800080">
+  <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+  "header">
+    <tr>
+      <td valign="top" width="300">
+        <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+        "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+      </td>
+
+      <td valign="top">
+        <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+        <h2 align="center">Headers &lt;boost/python/class.hpp&gt;,
+        &lt;boost/python/class_fwd.hpp&gt;</h2>
+      </td>
+    </tr>
+  </table>
+  <hr>
+
+  <h2>Contents</h2>
+
+  <dl class="page-index">
+    <dt><a href="#introduction">Introduction</a></dt>
+
+    <dt><a href="#classes">Classes</a></dt>
+
+    <dd>
+      <dl class="page-index">
+        <dt><a href="#class_-spec">Class template
+        <code>class_</code></a></dt>
+
+        <dd>
+          <dl class="page-index">
+            <dt><a href="#class_-spec-synopsis">Class <code>class_</code>
+            synopsis</a></dt>
+
+            <dt><a href="#class_-spec-ctors">Class <code>class_</code>
+            constructors</a></dt>
+
+            <dt><a href="#class_-spec-modifiers">Class <code>class_</code>
+            modifier functions</a></dt>
+          </dl>
+        </dd>
+
+        <dt><a href="#bases-spec">Class template <code>bases</code></a></dt>
+
+        <dd>
+          <dl class="page-index">
+            <dt><a href="#bases-spec-synopsis">Class template
+            <code>bases</code> synopsis</a></dt>
+          </dl>
+        </dd>
+      </dl>
+    </dd>
+
+    <dt><a href="#examples">Example(s)</a></dt>
+  </dl>
+  <hr>
+
+  <h2><a name="introduction" id="introduction"></a>Introduction</h2>
+
+  <p><code>&lt;boost/python/class.hpp&gt;</code> defines the interface
+  through which users expose their C++ classes to Python. It declares the
+  <code>class_</code> class template, which is parameterized on the class
+  type being exposed. It also exposes the <code>init</code>,
+  <code>optional</code> and <code>bases</code> utility class templates, which
+  are used in conjunction with <code>class_</code>.</p>
+
+  <p><code>&lt;boost/python/class_fwd.hpp&gt;</code> contains a forward
+  declaration of the <code>class_</code> class template.</p>
+
+  <h2><a name="classes" id="classes"></a>Classes</h2>
+
+  <h3><a name="class_-spec" id="class_-spec"></a>Class template
+  <code>class_&lt;T,&nbsp;<font color="#007F00">Bases,&nbsp;HeldType,
+  NonCopyable</font>&gt;</code></h3>
+
+  <p>Creates a Python class associated with the C++ type passed as its first
+  parameter. Although it has four template parameters, only the first one is
+  required. The three optional arguments can actually be supplied
+  <font color="#007F00"><b>in any order</b></font>; Boost.Python determines
+  the role of the argument from its type.<br>
+  <br></p>
+
+  <table border="1" summary="class_ template parameters">
+    <tr>
+      <th>Template Parameter</th>
+
+      <th>Requirements</th>
+
+      <th>Semantics</th>
+
+      <th>Default</th>
+    </tr>
+
+    <tr>
+      <td><code>T</code></td>
+
+      <td>A class type.</td>
+
+      <td>The class being wrapped</td>
+    </tr>
+
+    <tr>
+      <td><code><font color="#007F00">Bases</font></code></td>
+
+      <td>A specialization of <a href=
+      "#bases-spec"><code>bases&lt;</code>...<code>&gt;</code></a> which
+      specifies previously-exposed C++ base classes of <code>T</code><a href=
+      "#footnote_1">[1]</a>.</td>
+
+      <td>Registers <code>from_python</code> conversions from wrapped
+      <code>T</code> instances to each of its exposed direct and indirect
+      bases. For each polymorphic base <code>B</code>, registers conversions
+      from indirectly-held wrapped <code>B</code> instances to
+      <code>T</code>.</td>
+
+      <td><code><a href="#bases-spec">bases&lt;&gt;</a></code></td>
+    </tr>
+
+    <tr>
+      <td><code><font color="#007F00">HeldType</font></code></td>
+
+      <td>Must be <code>T</code>, a class derived from <code>T</code>, or a
+      <a href="Dereferenceable.html">Dereferenceable</a> type for which
+      <code><a href=
+      "pointee.html#pointee-spec">pointee</a>&lt;HeldType&gt;::type</code> is
+      <code>T</code> or a class derived from <code>T</code>.</td>
+
+      <td>Specifies the type that is actually embedded in a Python object
+      wrapping a <code>T</code> instance when <code>T</code>'s constructor is
+      called or when a <code>T</code> or <code>T*</code> is converted to
+      Python without the use of <a href=
+      "http://www.boost.org/libs/python/doc/v2/callbacks.html#argument_handling">
+      <code>ptr</code></a>, <a href=
+      "http://www.boost.org/libs/python/doc/v2/callbacks.html#argument_handling">
+      <code>ref</code></a>, or <a href="CallPolicies.html">Call Policies</a>
+      such as <code><a href=
+      "return_internal_reference.html">return_internal_reference</a></code>.
+      More details <a href="#HeldType">below</a>.</td>
+
+      <td><code>T</code></td>
+    </tr>
+
+    <tr>
+      <td><code><font color="#007F00">NonCopyable</font></code></td>
+
+      <td>If supplied, must be <a href=
+      "../../../utility/utility.htm#Class_noncopyable">boost::noncopyable</a>.</td>
+
+      <td>Suppresses automatic registration of <code>to_python</code>
+      conversions which copy <code>T</code> instances. Required when
+      <code>T</code> has no publicly-accessible copy constructor.</td>
+
+      <td>An unspecified type other than
+      <code>boost::noncopyable</code>.</td>
+    </tr>
+  </table>
+
+  <h4><a name="HeldType" id="HeldType">HeldType Semantics</a></h4>
+
+  <ol>
+    <li>If <code>HeldType</code> is derived from T, its exposed
+    constructor(s) must accept an initial <code>PyObject*</code> argument
+    which refers back to the Python object that contains the
+    <code>HeldType</code> instance, as shown in <a href=
+    "call_method.html#examples">this example</a>. This argument is not
+    included in the <em><a href=
+    "init.html#init-expressions">init-expression</a></em> passed to <a href=
+    "#class_-spec-modifiers"><code>def(init_expr)</code></a>, below, nor is
+    it passed explicitly by users when Python instances of <code>T</code> are
+    created. This idiom allows C++ virtual functions which will be overridden
+    in Python to access the Python object so the Python method can be
+    invoked. Boost.Python automatically registers additional converters which
+    allow wrapped instances of <code>T</code> to be passed to wrapped C++
+    functions expecting <code>HeldType</code> arguments.</li>
+
+    <li>Because Boost.Python will always allow wrapped instances of
+    <code>T</code> to be passed in place of <code>HeldType</code> arguments,
+    specifying a smart pointer for <code>HeldType</code> allows users to pass
+    Python <code>T</code> instances where a smart pointer-to-<code>T</code>
+    is expected. Smart pointers such as <code>std::auto_ptr&lt;&gt;</code> or
+    <code><a href=
+    "../../../smart_ptr/shared_ptr.htm">boost::shared_ptr&lt;&gt;</a></code>
+    which contain a nested type <code>element_type</code> designating the
+    referent type are automatically supported; additional smart pointer types
+    can be supported by specializing <a href=
+    "pointee.html#pointee-spec">pointee&lt;HeldType&gt;</a>.</li>
+
+    <li>As in case 1 above, when <code>HeldType</code> is a smart pointer to
+    a class derived from <code>T</code>, the initial <code>PyObject*</code>
+    argument must be supplied by all of <code>HeldType</code>'s exposed
+    constructors.</li>
+
+    <li>Except in cases 1 and 3, users may optionally specify that T itself
+    gets initialized with a similar initial <code>PyObject*</code> argument
+    by specializing <a href=
+    "has_back_reference.html#has_back_reference-spec">has_back_reference&lt;T&gt;</a>.</li>
+  </ol>
+
+  <h4><a name="class_-spec-synopsis" id="class_-spec-synopsis"></a>Class
+  template <code>class_</code> synopsis</h4>
+  <pre>
+namespace boost { namespace python
+{
+  template &lt;class T
+   <font color="#007F00">   , class Bases = bases&lt;&gt;
+            , class HeldType = T
+            , class NonCopyable = <i>unspecified</i>
+           &gt;
+</font>  class class_ : public <a href="object.html#object-spec">object</a>
+  {
+    // Constructors with default __init__
+    class_(char const* name);
+    class_(char const* name, char const* docstring);
+
+    // Constructors, specifying non-default __init__
+    template &lt;class Init&gt;
+    class_(char const* name, Init);
+    template &lt;class Init&gt;
+    class_(char const* name, char const* docstring, Init);
+
+    // Exposing additional __init__ functions
+    template &lt;class Init&gt;
+    class_&amp; def(Init);
+
+    // defining methods
+    template &lt;class F&gt;
+    class_&amp; def(char const* name, F f);
+    template &lt;class Fn, class A1&gt;
+    class_&amp; def(char const* name, Fn fn, A1 const&amp;);
+    template &lt;class Fn, class A1, class A2&gt;
+    class_&amp; def(char const* name, Fn fn, A1 const&amp;, A2 const&amp;);
+    template &lt;class Fn, class A1, class A2, class A3&gt;
+    class_&amp; def(char const* name, Fn fn, A1 const&amp;, A2 const&amp;, A3 const&amp;);
+
+    // declaring method as static
+    class_&amp; staticmethod(char const* name);
+    
+    // exposing operators
+    template &lt;<i>unspecified</i>&gt;
+    class_&amp; def(<a href=
+"operators.html#operator_-spec">detail::operator_</a>&lt;unspecified&gt;);
+
+    // Raw attribute modification
+    template &lt;class U&gt;
+    class_&amp; setattr(char const* name, U const&amp;);
+
+    // exposing data members
+    template &lt;class D&gt;
+    class_&amp; def_readonly(char const* name, D T::*pm);
+
+    template &lt;class D&gt;
+    class_&amp; def_readwrite(char const* name, D T::*pm);
+
+    // exposing static data members
+    template &lt;class D&gt;
+    class_&amp; def_readonly(char const* name, D const&amp; d);
+    template &lt;class D&gt;
+    class_&amp; def_readwrite(char const* name, D&amp; d);
+
+    // property creation
+    template &lt;class Get&gt;
+    void add_property(char const* name, Get const&amp; fget, char const* doc=0);
+    template &lt;class Get, class Set&gt;
+    void add_property(
+        char const* name, Get const&amp; fget, Set const&amp; fset, char const* doc=0);
+
+    template &lt;class Get&gt;
+    void add_static_property(char const* name, Get const&amp; fget);
+    template &lt;class Get, class Set&gt;
+    void add_static_property(char const* name, Get const&amp; fget, Set const&amp; fset);
+
+    // pickle support
+    template &lt;typename PickleSuite&gt;
+    self&amp; def_pickle(PickleSuite const&amp;);
+    self&amp; enable_pickling();
+  };
+}}
+</pre>
+
+  <h4><a name="class_-spec-ctors" id="class_-spec-ctors"></a>Class template
+  <code>class_</code> constructors</h4>
+  <pre>
+class_(char const* name);
+class_(char const* name, char const* docstring);
+template &lt;class Init&gt;
+class_(char const* name, Init init_spec);
+template &lt;class Init&gt;
+class_(char const* name, char const* docstring, Init init_spec);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>name</code> is an <a href=
+    "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+    "http://www.python.org/doc/current/ref/identifiers.html">identifier
+    naming rules</a>. If <code>docstring</code> is supplied, it must be an
+    <a href="definitions.html#ntbs">ntbs</a>. If <code>init_spec</code> is
+    supplied, it must be either the special enumeration constant
+    <code>no_init</code> or an <a href=
+    "init.html#init-expressions">init-expression</a> compatible with
+    <code>T</code>.</dt>
+
+    <dt><b>Effects:</b> Constructs a <code>class_</code> object holding a
+    Boost.Python extension class named <code>name</code>. The
+    <code>name</code>d attribute of the <a href=
+    "scope.html#introduction">current scope</a> is bound to the new extension
+    class.</dt>
+
+    <dd>
+      <ul>
+        <li>If supplied, the value of <code>docstring</code> is bound to the
+        <code>__doc__</code> attribute of the extension class.</li>
+
+        <li>If <code>init_spec</code> is <code>no_init</code>, a special
+        <code>__init__</code> function is generated which always raises a
+        Python exception. Otherwise, <code>this-&gt;def(init_spec)</code> is
+        called.</li>
+
+        <li>If <code>init_spec</code> is not supplied,
+        <code>this-&gt;def(init&lt;&gt;())</code> is called.</li>
+      </ul>
+    </dd>
+
+    <dt><b>Rationale:</b>Allowing the user to specify constructor arguments
+    in the <code>class_&lt;&gt;</code> constructor helps her to avoid the
+    common run-time errors which result from invoking wrapped member
+    functions without having exposed an <code>__init__</code> function which
+    creates the requisite <code>T</code> instance. Types which are not
+    default-constructible will cause a compile-time error unless
+    <code>Init</code> is supplied. The user must always supply
+    <code>name</code> as there is currently no portable method to derive the
+    text of the class name from its type.</dt>
+  </dl>
+
+  <h4><a name="class_-spec-modifiers" id="class_-spec-modifiers"></a>Class
+  template <code>class_</code> modifier functions</h4>
+  <pre>
+template &lt;class Init&gt;
+class_&amp; def(Init init_expr);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>init_expr</code> is the result of an <a href=
+    "init.html#init-expressions">init-expression</a> compatible with
+    <code>T</code>.</dt>
+
+    <dt><b>Effects:</b> For each <a href="init.html#init-expressions">valid
+    prefix</a> <em>P</em> of <code>Init</code>, adds an
+    <code>__init__(</code>...<code>)</code> function overload to the
+    extension class accepting <em>P</em> as arguments. Each overload
+    generated constructs an object of <code>HeldType</code> according to the
+    semantics described <a href="#HeldType">above</a>, using a copy of
+    <code>init_expr</code>'s <a href="CallPolicies.html">call policies</a>.
+    If the longest <a href="init.html#init-expressions">valid prefix</a> of
+    <code>Init</code> contains <em>N</em> types and <code>init_expr</code>
+    holds <em>M</em> keywords, an initial sequence of the keywords are used
+    for all but the first <em>N</em> - <em>M</em> arguments of each
+    overload.</dt>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+
+    <dt><b>Rationale:</b> Allows users to easily expose a class' constructor
+    to Python.</dt>
+  </dl><br>
+  <pre>
+template &lt;class F&gt;
+class_&amp; def(char const* name, Fn fn);
+template &lt;class Fn, class A1&gt;
+class_&amp; def(char const* name, Fn fn, A1 const&amp; a1);
+template &lt;class Fn, class A1, class A2&gt;
+class_&amp; def(char const* name, Fn fn, A1 const&amp; a1, A2 const&amp; a2);
+template &lt;class Fn, class A1, class A2, class A3&gt;
+class_&amp; def(char const* name, Fn fn, A1 const&amp; a1, A2 const&amp; a2, A3 const&amp; a3);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>name</code> is an <a href=
+    "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+    "http://www.python.org/doc/current/ref/identifiers.html">identifier
+    naming rules</a>.</dt>
+
+    <dd>
+      <ul>
+        <li>If <code>a1</code> is the result of an <a href=
+        "overloads.html#overload-dispatch-expression"><em>overload-dispatch-expression</em></a>,
+        only the second form is allowed and fn must be a pointer to function
+        or pointer to member function whose <a href="definitions.html#arity">
+          arity</a> is the same as A1's <a href=
+          "overloads.html#overload-dispatch-expression"><em>maximum
+          arity</em></a>.
+
+          <dl>
+            <dt><b>Effects:</b> For each prefix <em>P</em> of
+            <code>Fn</code>'s sequence of argument types, beginning with the
+            one whose length is <code>A1</code>'s <a href=
+            "overloads.html#overload-dispatch-expression"><em>minimum
+            arity</em></a>, adds a
+            <code><em>name</em>(</code>...<code>)</code> method overload to
+            the extension class. Each overload generated invokes
+            <code>a1</code>'s call-expression with <em>P</em>, using a copy
+            of <code>a1</code>'s <a href="CallPolicies.html">call
+            policies</a>. If the longest valid prefix of <code>A1</code>
+            contains <em>N</em> types and <code>a1</code> holds <em>M</em>
+            keywords, an initial sequence of the keywords are used for all
+            but the first <em>N</em> - <em>M</em> arguments of each
+            overload.<br></dt>
+          </dl>
+        </li>
+
+        <li>Otherwise, a single method overload is built around fn, which
+        must not be null:
+
+          <ul>
+            <li>If fn is a function pointer, its first argument must be of
+            the form <code>U</code>, <code>U <em>cv</em>&amp;</code>, <code>U
+            <em>cv</em>*</code>, or <code>U <em>cv</em>* const&amp;</code>,
+            where <code>T*</code> is convertible to <code>U*</code>, and
+            <code>a1</code>-<code>a3</code>, if supplied, may be selected in
+            any order from the table below.</li>
+
+            <li>Otherwise, if fn is a member function pointer, its target
+            must be <code>T</code> or one of its public base classes, and
+            <code>a1</code>-<code>a3</code>, if supplied, may be selected in
+            any order from the table below.</li>
+
+            <li>Otherwise, <code>Fn</code> must be [derived from]
+            <code><a href="object.html#object-spec">object</a></code>, and
+            <code>a1-a2</code>, if supplied, may be selcted in any order from
+            the first two rows of the table below. To be useful,
+            <code>fn</code> should be <a href=
+            "http://www.python.org/doc/current/lib/built-in-funcs.html#l2h-6">
+            callable</a>.</li>
+          </ul>
+
+          <table border="1" summary="def() optional arguments">
+            <tr>
+              <th>Memnonic Name</th>
+
+              <th>Requirements/Type properties</th>
+
+              <th>Effects</th>
+            </tr>
+
+            <tr>
+              <td>docstring</td>
+
+              <td>Any <a href="definitions.html#ntbs">ntbs</a>.</td>
+
+              <td>Value will be bound to the <code>__doc__</code> attribute
+              of the resulting method overload. If an earlier overload
+              supplied a docstring, two newline characters and the new
+              docstring are appended to it.</td>
+            </tr>
+
+            <tr>
+              <td>policies</td>
+
+              <td>A model of <a href=
+              "CallPolicies.html">CallPolicies</a></td>
+
+              <td>A copy will be used as the call policies of the resulting
+              method overload.</td>
+            </tr>
+
+            <tr>
+              <td>keywords</td>
+
+              <td>The result of a <a href=
+              "args.html#keyword-expression"><em>keyword-expression</em></a>
+              specifying no more arguments than the <a href=
+              "definitions.html#arity">arity</a> of <code>fn</code>.</td>
+
+              <td>A copy will be used as the call policies of the resulting
+              method overload.</td>
+            </tr>
+          </table>
+        </li>
+      </ul>
+    </dd>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+  </dl>
+  <pre>
+class_&amp; staticmethod(char const* name);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>name</code> is an <a href=
+    "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+    "http://www.python.org/doc/current/ref/identifiers.html">identifier
+    naming rules</a>, and corresponds to a method whose overloads have all
+    been defined.</dt>
+
+    <dt><b>Effects:</b> Replaces the existing named attribute <i>x</i> with
+    the result of invoking <code>staticmethod(</code><i>x</i><code>)</code>
+    in Python. Specifies that the corresponding method is static and
+    therefore no object instance will be passed to it. This is equivalent to
+    the Python statement:</dt>
+
+    <dd>
+      <pre>
+setattr(self, name, staticmethod(getattr(self, name)))
+</pre>
+    </dd>
+
+    <dt><b>Note:</b> Attempting to invoke <code>def(name,...)</code> after
+    invoking <code>staticmethod(name)</code> will <a href=
+    "definitions.html#raise">raise</a> a RuntimeError.</dt>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+  </dl><br>
+  <pre>
+template &lt;<i>unspecified</i>&gt;
+class_&amp; def(<a href=
+"operators.html#operator_-spec">detail::operator_</a>&lt;unspecified&gt;);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Effects:</b> Adds a Python <a href=
+    "http://www.python.org/doc/ref/specialnames.html">special method</a> as
+    described <a href="operators.html">here</a>.</dt>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+  </dl>
+  <pre>
+template &lt;class U&gt;
+class_&amp; setattr(char const* name, U const&amp; u);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>name</code> is an <a href=
+    "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+    "http://www.python.org/doc/current/ref/identifiers.html">identifier
+    naming rules</a>.</dt>
+
+    <dt><b>Effects:</b> Converts u to Python and adds it to the attribute
+    dictionary of the extension class:</dt>
+
+    <dd>
+      <blockquote>
+        <code><a href=
+        "http://www.python.org/doc/current/api/object.html#l2h-166">PyObject_SetAttrString</a>(this-&gt;ptr(),
+        name, <a href=
+        "object.html#object-spec-ctors">object</a>(u).ptr());</code>
+      </blockquote>
+    </dd>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+  </dl><br>
+  <pre>
+template &lt;class Get&gt;
+void add_property(char const* name, Get const&amp; fget, char const* doc=0);
+template &lt;class Get, class Set&gt;
+void add_property(
+        char const* name, Get const&amp; fget, Set const&amp; fset, char const* doc=0);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>name</code> is an <a href=
+    "definitions.html#ntbs">ntbs</a> which conform to Python's <a href=
+    "http://www.python.org/doc/current/ref/identifiers.html">identifier
+    naming rules</a>.</dt>
+
+    <dt><b>Effects:</b> Creates a new Python <a href=
+    "http://www.python.org/2.2.2/descrintro.html#property"><code>property</code></a>
+    class instance, passing <code><a href=
+    "object.html#object-spec-ctors">object</a>(fget)</code> (and
+    <code><a href="object.html#object-spec-ctors">object</a>(fset)</code> in
+    the second form) with an (optional) docstring <code>doc</code> to its
+    constructor, then adds that property to the Python class object under
+    construction with the given attribute <code>name</code>.</dt>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+
+    <dt><b>Rationale:</b> Allows users to easily expose functions that can be
+    invoked from Python with attribute access syntax.</dt>
+  </dl><br>
+  <pre>
+template &lt;class Get&gt;
+void add_static_property(char const* name, Get const&amp; fget);
+template &lt;class Get, class Set&gt;
+void add_static_property(char const* name, Get const&amp; fget, Set const&amp; fset);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>name</code> is an <a href=
+    "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+    "http://www.python.org/doc/current/ref/identifiers.html">identifier
+    naming rules</a>.</dt>
+
+    <dt><b>Effects:</b> Creates a Boost.Python.StaticProperty object, passing
+    <code><a href="object.html#object-spec-ctors">object</a>(fget)</code>
+    (and <code><a href=
+    "object.html#object-spec-ctors">object</a>(fset)</code> in the second
+    form) to its constructor, then adds that property to the Python class
+    under construction with the given attribute <code>name</code>.
+    StaticProperty is a special subclass of Python's <a href=
+    "http://www.python.org/2.2.2/descrintro.html#property"><code>property</code></a>
+    class which can be called without an initial <code>self</code>
+    argument.</dt>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+
+    <dt><b>Rationale:</b> Allows users to easily expose functions that can be
+    invoked from Python with static attribute access syntax.</dt>
+  </dl><br>
+  <pre>
+template &lt;class D&gt;
+class_&amp; def_readonly(char const* name, D T::*pm, char const* doc=0);
+template &lt;class D&gt;
+class_&amp; def_readonly(char const* name, D const&amp; d);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> <code>name</code> is an <a href=
+    "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+    "http://www.python.org/doc/current/ref/identifiers.html">identifier
+    naming rules</a>. <code>doc</code> is also an ntbs.</dt>
+
+    <dt><b>Effects:</b></dt>
+
+    <dd>
+      <pre>
+this-&gt;add_property(name, <a href=
+"data_members.html#make_getter-spec">make_getter</a>(pm), doc);
+</pre>and
+      <pre>
+this-&gt;add_static_property(name, <a href=
+"data_members.html#make_getter-spec">make_getter</a>(d));
+</pre>respectively.<br>
+      <br>
+    </dd>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+
+    <dt><b>Rationale:</b> Allows users to easily expose a class' data member
+    or free variable such that it can be inspected from Python with a natural
+    syntax.</dt>
+  </dl>
+  <pre>
+template &lt;class D&gt;
+class_&amp; def_readwrite(char const* name, D T::*pm, char const* doc=0);
+template &lt;class D&gt;
+class_&amp; def_readwrite(char const* name, D&amp; d);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Effects:</b></dt>
+
+    <dd>
+      <pre>
+this-&gt;add_property(name, <a href=
+"data_members.html#make_getter-spec">make_getter</a>(pm), <a href=
+"data_members.html#make_setter-spec">make_setter</a>(pm), doc);
+</pre>and
+      <pre>
+this-&gt;add_static_property(name, <a href=
+"data_members.html#make_getter-spec">make_getter</a>(d), <a href=
+"data_members.html#make_setter-spec">make_setter</a>(d));
+</pre>respectively.<br>
+      <br>
+    </dd>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+
+    <dt><b>Rationale:</b> Allows users to easily expose a class' data or free
+    variable member such that it can be inspected and set from Python with a
+    natural syntax.</dt>
+  </dl>
+  <pre>
+template &lt;typename PickleSuite&gt;
+class_&amp; def_pickle(PickleSuite const&amp;);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Requires:</b> PickleSuite must be publically derived from <a href=
+    "pickle.html"><code>pickle_suite</code></a>.</dt>
+
+    <dt><b>Effects:</b> Defines a legal combination of the special attributes
+    and methods: <code>__getinitargs__</code>, <code>__getstate__</code>,
+    <code>__setstate__</code>, <code>__getstate_manages_dict__</code>,
+    <code>__safe_for_unpickling__</code>, <code>__reduce__</code></dt>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+
+    <dt><b>Rationale:</b> Provides an <a href="pickle.html">easy to use
+    high-level interface</a> for establishing complete pickle support for the
+    wrapped class. The user is protected by compile-time consistency
+    checks.</dt>
+  </dl><br>
+  <pre>
+class_&amp; enable_pickling();
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Effects:</b> Defines the <code>__reduce__</code> method and the
+    <code>__safe_for_unpickling__</code> attribute.</dt>
+
+    <dt><b>Returns:</b> <code>*this</code></dt>
+
+    <dt><b>Rationale:</b> Light-weight alternative to
+    <code>def_pickle()</code>. Enables implementation of <a href=
+    "pickle.html">pickle support</a> from Python.</dt>
+  </dl><br>
+
+  <h3><a name="bases-spec" id="bases-spec"></a>Class template
+  <code>bases&lt;T1, T2,</code>...<code>TN&gt;</code></h3>
+
+  <p>An <a href="../../../mpl/doc/refmanual/forward-sequence.html">MPL
+  sequence</a> which can be used in
+  <code>class_&lt;</code>...<code>&gt;</code> instantiations indicate a list
+  of base classes.</p>
+
+  <h4><a name="bases-spec-synopsis" id="bases-spec-synopsis"></a>Class
+  template <code>bases</code> synopsis</h4>
+  <pre>
+namespace boost { namespace python
+{
+  template &lt;T1 = <i>unspecified</i>,...T<i>n</i> = <i>unspecified</i>&gt;
+  struct bases
+  {};
+}}
+</pre>
+
+  <h2><a name="examples" id="examples"></a>Example(s)</h2>
+
+  <p>Given a C++ class declaration:</p>
+  <pre>
+class Foo : public Bar, public Baz
+{
+ public:
+   Foo(int x, char const* y);
+   Foo(double);
+
+   std::string const&amp; name() { return m_name; }
+   void name(char const*);
+
+   double value; // public data
+ private:
+   ...
+};
+</pre>A corresponding Boost.Python extension class can be created with:
+  <pre>
+using namespace boost::python;
+
+class_&lt;Foo,bases&lt;Bar,Baz&gt; &gt;("Foo",
+          "This is Foo's docstring."
+          "It describes our Foo extension class",
+
+          init&lt;int,char const*&gt;(args("x","y"), "__init__ docstring")
+          )
+   .def(init&lt;double&gt;())
+   .def("get_name", &amp;Foo::get_name, return_internal_reference&lt;&gt;())
+   .def("set_name", &amp;Foo::set_name)
+   .def_readwrite("value", &amp;Foo::value)
+   ;
+</pre>
+  <hr>
+  <a name="footnote_1" id="footnote_1">[1]</a> By "previously-exposed" we
+  mean that the for each <code>B</code> in <code>bases</code>, an instance of
+  <code>class_&lt;B<font color="#007F00">, ...</font>&gt;</code> must have
+  already been constructed.
+  <pre>
+class_&lt;Base&gt;("Base");
+class_&lt;Derived, bases&lt;Base&gt; &gt;("Derived");
+</pre>Revised 
+<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+   1 November, 2005 <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+
+  <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+  Abrahams</a> 2002.</i></p>
+</body>
+</html>

doc/v2/configuration.html

@@ -0,0 +1,190 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - Configuration</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Configuration</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#app-defined">Application Defined Macros</a></dt>
+
+      <dt><a href="#lib-defined-impl">Library Defined Implementation
+      Macros</a></dt>
+    </dl>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><b>Boost.Python</b> uses several configuration macros in <a href=
+    "http://www.boost.org/libs/config/config.htm">&lt;boost/config.hpp&gt;</a>,
+    as well as configuration macros meant to be supplied by the application.
+    These macros are documented here.</p>
+
+    <h2><a name="app-defined"></a>Application Defined Macros</h2>
+
+    <p>These are the macros that may be defined by an application using
+    <b>Boost.Python</b>. Note that if you extend a strict interpretation of
+    the C++ standard to cover dynamic libraries, using different values of
+    these macros when compiling different libraries (including extension
+    modules and the <b>Boost.Python</b> library itself) is a violation of the
+    <a href="definitions.html#ODR">ODR</a>. However, we know of no C++
+    implementations on which this particular violation is detectable or
+    causes any problems.</p>
+
+    <table summary="application defined macros" width="100%" cellpadding=
+    "10">
+      <tr>
+        <th align="left"><b>Macro</b></th>
+
+        <th><b>Default</b></th>
+
+        <th align="left"><b>Meaning</b></th>
+      </tr>
+
+      <tr>
+        <td valign="top"><code>BOOST_PYTHON_MAX_ARITY</code></td>
+
+        <td valign="top" align="center">15</td>
+
+        <td valign="top">The maximum <a href=
+        "definitions.html#arity">arity</a> of any function, member function,
+        or constructor to be wrapped, invocation of a <b>Boost.Python</b>
+        function wich is specified as taking arguments
+        <code>x1,&nbsp;x2,</code>...<code>X</code><i>n</i>. This includes, in
+        particular, callback mechanisms such as <code><a href=
+        "object.html#object-spec">object</a>::operator()(</code>...<code>)</code>
+        or <code><a href=
+        "call_method.html#call_method-spec">call_method</a>&lt;R&gt;(</code>...
+        <code>)</code>.</td>
+      </tr>
+
+      <tr>
+        <td valign="top"><code>BOOST_PYTHON_MAX_BASES</code></td>
+
+        <td valign="top" align="center">10</td>
+
+        <td valign="top">The maximum number of template arguments to the
+        <code><a href=
+        "class.html#bases-spec">bases</a>&lt;</code>...<code>&gt;</code>
+        class template, which is used to specify the bases of a wrapped C++
+        class..</td>
+      </tr>
+
+      <tr>
+        <td valign="top"><code>BOOST_PYTHON_STATIC_MODULE</code></td>
+
+        <td valign="top" align="center"><i>not&nbsp;defined</i></td>
+
+        <td valign="top">If defined, prevents your module initialization
+        function from being treated as an exported symbol on platforms which
+        support that distinction in-code</td>
+      </tr>
+    </table>
+
+    <h2><a name="lib-defined-impl"></a>Library Defined Implementation
+    Macros</h2>
+
+    <p>These macros are defined by <b>Boost.Python</b> and are implementation
+    details of interest only to implementors and those porting to new
+    platforms.</p>
+
+    <table summary="library defined implementation macros" width="100%"
+    cellpadding="10">
+      <tr>
+        <th align="left"><b>Macro</b></th>
+
+        <th><b>Default</b></th>
+
+        <th align="left"><b>Meaning</b></th>
+      </tr>
+
+      <tr>
+        <td valign="top"><code>BOOST_PYTHON_TYPE_ID_NAME</code></td>
+
+        <td valign="top" align="center"><i>not&nbsp;defined</i></td>
+
+        <td valign="top">If defined, this indicates that the type_info
+        comparison across shared library boundaries does not work on this
+        platform. In other words, if shared-lib-1 passes
+        <code>typeid(T)</code> to a function in shared-lib-2 which compares
+        it to <code>typeid(T)</code>, that comparison may return
+        <code>false</code>. If this macro is #defined, Boost.Python uses and
+        compares <code>typeid(T).name()</code> instead of using and comparing
+        the <code>std::type_info</code> objects directly.</td>
+      </tr>
+      <tr>
+        <td valign="top"><code>BOOST_PYTHON_NO_PY_SIGNATURES</code></td>
+
+        <td valign="top" align="center"><i>not&nbsp;defined</i></td>
+
+        <td valign="top">If defined for a module no pythonic signatures are generated 
+        for the docstrings of the module functions, and no python type is associated with any
+        of the converters registered by the module. This also reduces the binary size of the 
+        module by about 14% (gcc compiled).<br>
+        If defined for the boost_python runtime library, the default for the 
+        <code>docstring_options.enable_py_signatures()</code> is set to <code>false</code>.
+        </td>
+
+      </tr>
+      <tr>
+        <td valign="top"><code>BOOST_PYTHON_SUPPORTS_PY_SIGNATURES</code></td>
+
+        <td valign="top" align="center"><i>defined if <code>BOOST_PYTHON_NO_PY_SIGNATURES</code> is undefined</i></td>
+
+        <td valign="top">This macro is defined to enable a smooth transition from older Boost.Python versions
+        which do not support pythonic signatures. For example usage see 
+        <a href="pytype_function.html#examples">here</a>.
+        </td>
+
+      </tr>
+      <tr>
+        <td valign="top"><code>BOOST_PYTHON_PY_SIGNATURES_PROPER_INIT_SELF_TYPE</code></td>
+
+        <td valign="top" align="center"><i>not&nbsp;defined</i></td>
+
+        <td valign="top">If defined the python type of <code>__init__</code> method "self" parameters
+        is properly generated, otherwise <code><b>object</b></code> is used. It is undefined
+        by default because it increases the binary size of the module by about 14% (gcc compiled).</td>
+
+      </tr>
+    </table>
+    <hr>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     7 January, 2003 
+    <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/copy_const_reference.html

@@ -0,0 +1,149 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python -
+    &lt;boost/python/copy_const_reference.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header
+          &lt;boost/python/copy_const_reference.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#copy_const_reference-spec">Class
+          <code>copy_const_reference</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#copy_const_reference-spec-synopsis">Class
+              <code>copy_const_reference</code> synopsis</a></dt>
+
+              <dt><a href="#copy_const_reference-spec-metafunctions">Class
+              <code>copy_const_reference</code> metafunctions</a></dt>
+            </dl>
+          </dd>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="copy_const_reference-spec"></a>Class
+    <code>copy_const_reference</code></h3>
+
+    <p><code>copy_const_reference</code> is a model of <a href=
+    "ResultConverter.html#ResultConverterGenerator-concept">ResultConverterGenerator</a>
+    which can be used to wrap C++ functions returning a reference-to-const
+    type such that the referenced value is copied into a new Python
+    object.</p>
+
+    <h4><a name="copy_const_reference-spec-synopsis"></a>Class
+    <code>copy_const_reference</code> synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+    struct copy_const_reference
+    {
+        template &lt;class T&gt; struct apply;
+    };
+}}
+</pre>
+
+    <h4><a name="copy_const_reference-spec-metafunctions"></a>Class
+    <code>copy_const_reference</code> metafunctions</h4>
+<pre>
+template &lt;class T&gt; struct apply
+</pre>
+
+    <dl class="metafunction-semantics">
+      <dt><b>Requires:</b> <code>T</code> is <code>U const&amp;</code> for
+      some <code>U</code>.</dt>
+
+      <dt><b>Returns:</b> <code>typedef <a href=
+      "to_python_value.html#to_python_value-spec">to_python_value</a>&lt;T&gt;
+      type;</code></dt>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+
+    <h3>C++ Module Definition</h3>
+<pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/class.hpp&gt;
+#include &lt;boost/python/copy_const_reference.hpp&gt;
+#include &lt;boost/python/return_value_policy.hpp&gt;
+
+// classes to wrap
+struct Bar { int x; }
+
+struct Foo {
+   Foo(int x) : { b.x = x; }
+   Bar const&amp; get_bar() const { return b; }
+ private:
+   Bar b;
+};
+
+// Wrapper code
+using namespace boost::python;
+BOOST_PYTHON_MODULE(my_module)
+{
+    class_&lt;Bar&gt;("Bar");
+
+     class_&lt;Foo&gt;("Foo", init&lt;int&gt;())
+        .def("get_bar", &amp;Foo::get_bar
+            , return_value_policy&lt;copy_const_reference&gt;())
+       ;
+}
+</pre>
+
+    <h3>Python Code</h3>
+<pre>
+&gt;&gt;&gt; from my_module import *
+&gt;&gt;&gt; f = Foo(3)         # create a Foo object
+&gt;&gt;&gt; b = f.get_bar()    # make a copy of the internal Bar object
+</pre>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/copy_non_const_reference.html

@@ -0,0 +1,149 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python -
+    &lt;boost/python/copy_non_const_reference.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header
+          &lt;boost/python/copy_non_const_reference.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#copy_non_const_reference-spec">Class
+          <code>copy_non_const_reference</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#copy_non_const_reference-spec-synopsis">Class
+              <code>copy_non_const_reference</code> synopsis</a></dt>
+
+              <dt><a href=
+              "#copy_non_const_reference-spec-metafunctions">Class
+              <code>copy_non_const_reference</code> metafunctions</a></dt>
+            </dl>
+          </dd>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="copy_non_const_reference-spec"></a>Class
+    <code>copy_non_const_reference</code></h3>
+
+    <p><code>copy_non_const_reference</code> is a model of <a href=
+    "ResultConverter.html#ResultConverterGenerator-concept">ResultConverterGenerator</a>
+    which can be used to wrap C++ functions returning a
+    reference-to-non-const type such that the referenced value is copied into
+    a new Python object.</p>
+
+    <h4><a name="copy_non_const_reference-spec-synopsis"></a>Class
+    <code>copy_non_const_reference</code> synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+    struct copy_non_const_reference
+    {
+        template &lt;class T&gt; struct apply;
+    };
+}}
+</pre>
+
+    <h4><a name="copy_non_const_reference-spec-metafunctions"></a>Class
+    <code>copy_non_const_reference</code> metafunctions</h4>
+<pre>
+template &lt;class T&gt; struct apply
+</pre>
+
+    <dl class="metafunction-semantics">
+      <dt><b>Requires:</b> <code>T</code> is <code>U&amp;</code> for some
+      non-const <code>U</code>.</dt>
+
+      <dt><b>Returns:</b> <code>typedef <a href=
+      "to_python_value.html#to_python_value-spec">to_python_value</a>&lt;T&gt;
+      type;</code></dt>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+
+    <p>C++ code:</p>
+<pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/class.hpp&gt;
+#include &lt;boost/python/copy_non_const_reference.hpp&gt;
+#include &lt;boost/python/return_value_policy.hpp&gt;
+
+// classes to wrap
+struct Bar { int x; }
+
+struct Foo {
+   Foo(int x) : { b.x = x; }
+   Bar&amp; get_bar() { return b; }
+ private:
+   Bar b;
+};
+
+// Wrapper code
+using namespace boost::python;
+BOOST_PYTHON_MODULE(my_module)
+{
+    class_&lt;Bar&gt;("Bar");
+
+     class_&lt;Foo&gt;("Foo", init&lt;int&gt;())
+        .def("get_bar", &amp;Foo::get_bar
+            , return_value_policy&lt;copy_non_const_reference&gt;())
+       ;
+}
+</pre>
+    Python Code: 
+<pre>
+&gt;&gt;&gt; from my_module import *
+&gt;&gt;&gt; f = Foo(3)         # create a Foo object
+&gt;&gt;&gt; b = f.get_bar()    # make a copy of the internal Bar object
+</pre>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/data_members.html

@@ -0,0 +1,229 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Cygwin (vers 1st April 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/data_members.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header
+          &lt;boost/python/data_members.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#functions">Functions</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#make_getter-spec">make_getter</a></dt>
+
+          <dt><a href="#make_setter-spec">make_setter</a></dt>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><code><a href="#make_getter-spec">make_getter</a>()</code> and
+    <code><a href="#make_setter-spec">make_setter</a>()</code> are the
+    functions used internally by <code>class_&lt;&gt;::<a href=
+    "class.html#class_-spec-modifiers">def_readonly</a></code> and
+    <code>class_&lt;&gt;::<a href=
+    "class.html#class_-spec-modifiers">def_readwrite</a></code> to produce
+    Python callable objects which wrap C++ data members.</p>
+
+    <h2><a name="functions"></a>Functions</h2>
+<pre>
+<a name="make_getter-spec">template &lt;class C, class D&gt;</a>
+<a href="object.html#object-spec">object</a> make_getter(D C::*pm);
+
+template &lt;class C, class D, class Policies&gt;
+<a href=
+"object.html#object-spec">object</a> make_getter(D C::*pm, Policies const&amp; policies);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> <code>Policies</code> is a model of <a href=
+      "CallPolicies.html">CallPolicies</a>.</dt>
+
+      <dt><b>Effects:</b> Creates a Python callable object which accepts a
+      single argument that can be converted <code>from_python</code> to
+      <code>C*</code>, and returns the corresponding member <code>D</code>
+      member of the <code>C</code> object, converted <code>to_python</code>.
+      If <code>policies</code> is supplied, it will be applied to the
+      function as described <a href="CallPolicies.html">here</a>. Otherwise,
+      the library attempts to determine whether <code>D</code> is a
+      user-defined class type, and if so uses <code><a href=
+      "return_internal_reference.html#return_internal_reference-spec">return_internal_reference</a>&lt;&gt;</code></dt>
+
+      <dt>for <code>Policies</code>. Note that this test may inappropriately
+      choose <code>return_internal_reference&lt;&gt;</code> in some cases
+      when <code>D</code> is a smart pointer type. This is a known
+      defect.</dt>
+
+      <dt><b>Returns:</b> An instance of <a href=
+      "object.html#object-spec">object</a> which holds the new Python
+      callable object.</dt>
+    </dl>
+<pre>
+template &lt;class D&gt;
+<a href="object.html#object-spec">object</a> make_getter(D const&amp; d);
+template &lt;class D, class Policies&gt;
+<a href=
+"object.html#object-spec">object</a> make_getter(D const&amp; d, Policies const&amp; policies);
+
+template &lt;class D&gt;
+<a href="object.html#object-spec">object</a> make_getter(D const* p);
+template &lt;class D, class Policies&gt;
+<a href=
+"object.html#object-spec">object</a> make_getter(D const* p, Policies const&amp; policies);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> <code>Policies</code> is a model of <a href=
+      "CallPolicies.html">CallPolicies</a>.</dt>
+
+      <dt><b>Effects:</b> Creates a Python callable object which accepts no
+      arguments and returns <code>d</code> or <code>*p</code>, converted
+      <code>to_python</code> on demand. If <code>policies</code> is supplied,
+      it will be applied to the function as described <a href=
+      "CallPolicies.html">here</a>. Otherwise, the library attempts to
+      determine whether <code>D</code> is a user-defined class type, and if
+      so uses <code><a href=
+      "reference_existing_object.html#reference_existing_object-spec">reference_existing_object</a></code></dt>
+
+      <dt>for <code>Policies</code>.</dt>
+
+      <dt><b>Returns:</b> An instance of <a href=
+      "object.html#object-spec">object</a> which holds the new Python
+      callable object.</dt>
+    </dl>
+<pre>
+<a name="make_setter-spec">template &lt;class C, class D&gt;</a>
+<a href="object.html#object-spec">object</a> make_setter(D C::*pm);
+
+template &lt;class C, class D, class Policies&gt;
+<a href=
+"object.html#object-spec">object</a> make_setter(D C::*pm, Policies const&amp; policies);
+</pre>
+
+    <dl class="function*-semantics">
+      <dt><b>Requires:</b> <code>Policies</code> is a model of <a href=
+      "CallPolicies.html">CallPolicies</a>.</dt>
+
+      <dt><b>Effects:</b> Creates a Python callable object which, when called
+      from Python, expects two arguments which can be converted
+      <code>from_python</code> to <code>C*</code> and
+      <code>D&nbsp;const&amp;</code>, respectively, and sets the
+      corresponding <code>D</code> member of the <code>C</code> object. If
+      <code>policies</code> is supplied, it will be applied to the function
+      as described <a href="CallPolicies.html">here</a>.</dt>
+
+      <dt><b>Returns:</b> An instance of <a href=
+      "object.html#object-spec">object</a> which holds the new Python
+      callable object.</dt>
+    </dl>
+<pre>
+template &lt;class D&gt;
+<a href="object.html#object-spec">object</a> make_setter(D&amp; d);
+template &lt;class D, class Policies&gt;
+<a href=
+"object.html#object-spec">object</a> make_setter(D&amp; d, Policies const&amp; policies);
+
+template &lt;class D&gt;
+<a href="object.html#object-spec">object</a> make_setter(D* p);
+template &lt;class D, class Policies&gt;
+<a href=
+"object.html#object-spec">object</a> make_setter(D* p, Policies const&amp; policies);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> <code>Policies</code> is a model of <a href=
+      "CallPolicies.html">CallPolicies</a>.</dt>
+
+      <dt><b>Effects:</b> Creates a Python callable object which accepts one
+      argument, which is converted from Python to <code>D const&amp;</code>
+      and written into <code>d</code> or <code>*p</code>, respectively. If
+      <code>policies</code> is supplied, it will be applied to the function
+      as described <a href="CallPolicies.html">here</a>.</dt>
+
+      <dt><b>Returns:</b> An instance of <a href=
+      "object.html#object-spec">object</a> which holds the new Python
+      callable object.</dt>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+
+    <p>The code below uses make_getter and make_setter to expose a data
+    member as functions:</p>
+<pre>
+#include &lt;boost/python/data_members.hpp&gt;
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/class.hpp&gt;
+
+struct X
+{
+    X(int x) : y(x) {}
+    int y;
+};
+
+using namespace boost::python;
+
+BOOST_PYTHON_MODULE_INIT(data_members_example)
+{
+    class_&lt;X&gt;("X", init&lt;int&gt;())
+       .def("get", make_getter(&amp;X::y))
+       .def("set", make_setter(&amp;X::y))
+       ;
+}
+</pre>
+    It can be used this way in Python: 
+<pre>
+&gt;&gt;&gt; from data_members_example import *
+&gt;&gt;&gt; x = X(1)
+&gt;&gt;&gt; x.get()
+1
+&gt;&gt;&gt; x.set(2)
+&gt;&gt;&gt; x.get()
+2
+</pre>
+
+    <p>
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     5 August, 2003 <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/def.html

@@ -0,0 +1,191 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Cygwin (vers 1st April 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/def.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;boost/python/def.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#functions">Functions</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#def-spec">def</a></dt>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><code><a href="#def-spec">def</a>()</code> is the function which can
+    be used to expose C++ functions and callable objects as Python functions
+    in the current <code><a href="scope.html">scope</a></code>.</p>
+
+    <h2><a name="functions"></a>Functions</h2>
+    <a name="def-spec"></a>def 
+<pre>
+template &lt;class F&gt;
+void def(char const* name, F f);
+
+template &lt;class Fn, class A1&gt;
+void def(char const* name, Fn fn, A1 const&amp;);
+
+template &lt;class Fn, class A1, class A2&gt;
+void def(char const* name, Fn fn, A1 const&amp;, A2 const&amp;);
+
+template &lt;class Fn, class A1, class A2, class A3&gt;
+void def(char const* name, Fn fn, A1 const&amp;, A2 const&amp;, A3 const&amp;);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> <code>name</code> is an <a href=
+      "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+      "http://www.python.org/doc/current/ref/identifiers.html">identifier
+      naming rules</a>.</dt>
+
+      <dd>
+        <ul>
+          <li>If <code>Fn</code> is [derived from] <code><a href=
+          "object.html#object-spec">object</a></code>, it will be added to
+          the current scope as a single overload. To be useful,
+          <code>fn</code> should be <a href=
+          "http://www.python.org/doc/current/lib/built-in-funcs.html#l2h-6">callable</a>.</li>
+
+          <li>
+            If <code>a1</code> is the result of an <a href=
+            "overloads.html#overload-dispatch-expression"><em>overload-dispatch-expression</em></a>,
+            only the second form is allowed and fn must be a pointer to
+            function or pointer to member function whose <a href=
+            "definitions.html#arity">arity</a> is the same as A1's <a href=
+            "overloads.html#overload-dispatch-expression"><em>maximum
+            arity</em></a>. 
+
+            <dl>
+              <dt><b>Effects:</b> For each prefix <em>P</em> of
+              <code>Fn</code>'s sequence of argument types, beginning with
+              the one whose length is <code>A1</code>'s <a href=
+              "overloads.html#overload-dispatch-expression"><em>minimum
+              arity</em></a>, adds a
+              <code><em>name</em>(</code>...<code>)</code> function overload
+              to the <a href="scope.html">current scope</a>. Each overload
+              generated invokes <code>a1</code>'s call-expression with
+              <em>P</em>, using a copy of <code>a1</code>'s <a href=
+              "CallPolicies.html">call policies</a>. If the longest valid
+              prefix of <code>A1</code> contains <em>N</em> types and
+              <code>a1</code> holds <em>M</em> keywords, an initial sequence
+              of the keywords are used for all but the first
+              <em>N</em>&nbsp;-&nbsp;<em>M</em> arguments of each
+              overload.<br>
+              </dt>
+            </dl>
+          </li>
+
+          <li>Otherwise, fn must be a non-null function or member function
+          pointer, and a single function overload built around fn is added to
+          the <a href="scope.html">current scope</a>. If any of
+          <code>a1</code>-<code>a3</code> are supplied, they may be selected
+          in any order from the table below.</li>
+        </ul>
+
+        <table border="1" summary="def() optional arguments">
+          <tr>
+            <th>Memnonic Name</th>
+
+            <th>Requirements/Type properties</th>
+
+            <th>Effects</th>
+          </tr>
+
+          <tr>
+            <td>docstring</td>
+
+            <td>Any <a href="definitions.html#ntbs">ntbs</a>.</td>
+
+            <td>Value will be bound to the <code>__doc__</code> attribute of
+            the resulting method overload.</td>
+          </tr>
+
+          <tr>
+            <td>policies</td>
+
+            <td>A model of <a href="CallPolicies.html">CallPolicies</a></td>
+
+            <td>A copy will be used as the call policies of the resulting
+            method overload.</td>
+          </tr>
+
+          <tr>
+            <td>keywords</td>
+
+            <td>The result of a <a href=
+            "args.html#keyword-expression"><em>keyword-expression</em></a>
+            specifying no more arguments than the <a href=
+            "definitions.html#arity">arity</a> of <code>fn</code>.</td>
+
+            <td>A copy will be used as the call policies of the resulting
+            method overload.</td>
+          </tr>
+        </table>
+      </dd>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+<pre>
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/args.hpp&gt;
+
+using namespace boost::python;
+
+char const* foo(int x, int y) { return "foo"; }
+
+BOOST_PYTHON_MODULE(def_test)
+{
+    def("foo", foo, args("x", "y"), "foo's docstring");
+}
+</pre>
+
+    <p>
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     7 March, 2003
+    <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/def_visitor.html

@@ -0,0 +1,137 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+    <meta name="generator" content="Microsoft FrontPage 5.0">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/def_visitor.hpp&gt;</title>
+
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html"><font size="7">Boost.Python</font></a></h1>
+
+          <h2 align="center">Header &lt;boost/python/def_visitor.hpp&gt;</h2>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    
+<dl class="page-index">
+  <dt><a href="#introduction">Introduction</a> 
+  <dt><a href="#classes">Classes</a> 
+  <dd> 
+    <dl class="page-index">
+      <dt><a href="#def_visitor-spec">Class <code>def_visitor</code></a>
+      <dd> <a href="#def_visitor-synopsis">Class <code>def_visitor</code> 
+        synopsis</a></dd>
+      <dd> <a href="#def_visitor-requirements">Class <code>def_visitor</code> 
+        requirements</a></dd>
+    </dl>
+  <dt><a href="#examples">Example</a> 
+</dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    
+<p><code>&lt;boost/python/def_visitor.hpp&gt;</code> provides a generic visitation 
+  interface through which the <a href="class.html">class_</a> <b>def</b> member 
+  functionality can be extended non-intrusively to avoid cluttering the <a href="class.html">class_</a> 
+  interface. It declares the <code>def_visitor&lt;T&gt; </code>class template, 
+  which is parameterized on the derived type <tt>DerivedVisitor</tt>, which provides 
+  the actual <b>def</b> functionality through its <b>visit</b> member functions.
+<h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="def_visitor-spec"></a>Class template <code>def_visitor&lt;DerivedVisitor&gt;</code></h3>
+
+    
+<p>The class def_visitor is a base class paramaterized by its derived class. The 
+  def_visitor class is a protocol class. Its derived class, DerivedVisitor, is 
+  expected to have a member function visit. The def_visitor class is never instantiated 
+  directly. Instead, an instance of its subclass, DerivedVisitor,&nbsp; is passed 
+  on as an argument to the <a href="class.html">class_</a> def member function.
+<h4>
+<a name="def_visitor-synopsis" id="def_visitor-synopsis"></a>Class <code>def_visitor </code>synopsis</h4>
+<pre>namespace boost { namespace python {
+
+    template &lt;class DerivedVisitor&gt;
+    class def_visitor {};
+}</pre>
+<h3><a name="def_visitor-requirements"></a><code>def_visitor </code>requirements</h3>
+
+    
+<p>The <span class="pre">client supplied class </span><span class="pre"></span><tt class="literal"><span class="pre">DerivedVisitor</span></tt> 
+  template parameter is expected to:
+<ul>
+  <li>be privately derived from def_visitor</li>
+  <li>grant friend access to class def_visitor_access</li>
+  <li>define either or both visit member functions listed in the table below:</li>
+</ul>
+
+    
+<table border class="table">
+  <tr> 
+    <td width="181" nowrap><b>Expression</b></td>
+    <td width="85"><b>Return Type</b></td>
+    <td width="330"><b>Requirements</b></td>
+    <td width="259"><b>Effects</b></td>
+  </tr>
+  <tr> 
+    <td nowrap>visitor.visit(cls)</td>
+    <td>void</td>
+    <td>cls is an instance of a <a href="class.html">class_</a>&nbsp; being wrapped 
+      to Python. visitor is a def_visitor derived class.</td>
+    <td>A call to cls.def(visitor) forwards to this member function.</td>
+  </tr>
+  <tr> 
+    <td nowrap>visitor.visit(cls, name, options)</td>
+    <td>void</td>
+    <td>cls is a class_ instance, name is a C string. visitor is a def_visitor 
+      derived class. options is a context specific optional argument.</td>
+    <td>A call to cls.def(name, visitor) or cls.def(name, visitor, options) forwards 
+      to this member function. </td>
+  </tr>
+</table>
+
+    <h2><a name="examples"></a>Example</h2>
+
+    
+<pre>class X {/*...*/};<br>
+class my_def_visitor : boost::python::def_visitor&lt;my_def_visitor&gt;
+{
+    friend class def_visitor_access;
+
+    template &lt;class classT&gt;
+    void visit(classT&amp; c) const
+    {
+        c
+            .def(&quot;foo&quot;, &amp;my_def_visitor::foo)
+            .def(&quot;bar&quot;, &amp;my_def_visitor::bar)
+        ;
+    }
+
+    static void foo(X&amp; self);
+    static void bar(X&amp; self);
+};
+
+BOOST_PYTHON_MODULE(my_ext)
+{ 
+    class_&lt;X&gt;(&quot;X&quot;)
+        .def(my_def_visitor())
+    ;
+}
+</pre>
+  <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->27 August, 2003<!--webbot bot="Timestamp" endspan i-checksum="34484" -->
+  </p>
+
+
+    <p><i>&copy; Copyright Joel de Guzman 2003. </i> Distributed under the Boost
+   Software License, Version 1.0. (See accompanying
+   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 

doc/v2/default_call_policies.html

@@ -0,0 +1,173 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+    <meta name="generator" content="HTML Tidy, see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python -
+    &lt;boost/python/default_call_policies.hpp&gt;</title>
+
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header
+          &lt;boost/python/default_call_policies.hpp&gt;</h2>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#classes">Classes</a>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#default_call_policies-spec">Class
+          <code>default_call_policies</code></a>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#default_call_policies-spec-synopsis">Class
+              <code>default_call_policies</code> synopsis</a>
+
+              <dt><a href="#default_call_policies-spec-statics">Class
+              <code>default_call_policies</code> static functions</a>
+            </dl>
+
+          <dt><a href="#default_result_converter-spec">Class
+          <code>default_result_converter</code></a>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#default_result_converter-spec-synopsis">Class
+              <code>default_result_converter</code> synopsis</a>
+
+              <dt><a href="#default_result_converter-spec-metafunctions">Class
+              <code>default_result_converter</code> metafunctions</a>
+            </dl>
+        </dl>
+
+      <dt><a href="#examples">Example</a>
+    </dl>
+    <hr>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="default_call_policies-spec"></a>Class
+    <code>default_call_policies</code></h3>
+
+    <p><code>default_call_policies</code> is a model of <a href=
+    "CallPolicies.html">CallPolicies</a> with no <code>precall</code> or
+    <code>postcall</code> behavior and a <code>result_converter</code> which
+    handles by-value returns. Wrapped C++ functions and member functions use
+    <code>default_call_policies</code> unless otherwise specified. You may find
+    it convenient to derive new models of <a href=
+    "CallPolicies.html">CallPolicies</a> from
+    <code>default_call_policies</code>.
+
+    <h4><a name="default_call_policies-spec-synopsis"></a>Class
+    <code>default_call_policies</code> synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+    struct default_call_policies
+    {
+        static bool precall(PyObject*);
+        static PyObject* postcall(PyObject*, PyObject* result);
+        typedef <a href=
+"#default_result_converter-spec">default_result_converter</a> result_converter;
+        template &lt;class Sig&gt; struct extract_return_type : mpl::front&lt;Sig&gt;{};
+    };
+}}
+</pre>
+
+    <h4><a name="default_call_policies-spec-statics"></a>Class
+    <code>default_call_policies</code> static functions</h4>
+<pre>
+bool precall(PyObject*);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Returns:</b> <code>true</code>
+
+      <dt><b>Throws:</b> nothing
+    </dl>
+<pre>
+PyObject* postcall(PyObject*, PyObject* result);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Returns:</b> <code>result</code>
+
+      <dt><b>Throws:</b> nothing
+    </dl>
+
+    <h3><a name="default_result_converter-spec"></a>Class
+    <code>default_result_converter</code></h3>
+
+    <p><code>default_result_converter</code> is a model of <a href=
+    "ResultConverter.html#ResultConverterGenerator-concept">ResultConverterGenerator</a> which can be
+    used to wrap C++ functions returning non-pointer types, <code>char
+    const*</code>, and <code>PyObject*</code>, by-value.
+
+    <h4><a name="default_result_converter-spec-synopsis"></a>Class
+    <code>default_result_converter</code> synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+    struct default_result_converter
+    {
+        template &lt;class T&gt; struct apply;
+    };
+}}
+</pre>
+
+    <h4><a name="default_result_converter-spec-metafunctions"></a>Class
+    <code>default_result_converter</code> metafunctions</h4>
+<pre>
+template &lt;class T&gt; struct apply
+</pre>
+
+    <dl class="metafunction-semantics">
+      <dt><b>Requires:</b> <code>T</code> is not a reference type. If
+      <code>T</code> is a pointer type, <code>T</code> is <code>const
+      char*</code> or <code>PyObject*</code>.
+
+      <dt><b>Returns:</b> <code>typedef <a href=
+      "to_python_value.html#to_python_value-spec">to_python_value</a>&lt;T
+      const&amp;&gt; type;</code>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+
+    <p>This example comes from the Boost.Python implementation itself. Because
+    the <a href=
+    "return_value_policy.html#return_value_policy-spec">return_value_policy</a>
+    class template does not implement <code>precall</code> or
+    <code>postcall</code> behavior, its default base class is
+    <code>default_call_policies</code>:
+<pre>
+template &lt;class Handler, class Base = default_call_policies&gt;
+struct return_value_policy : Base
+{
+   typedef Handler result_converter;
+};
+</pre>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  11 June, 2007
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+
+
+  <p><i>&copy; Copyright <a href="http://www.boost.org/people/dave_abrahams.htm">Dave
+  Abrahams</a> 2002.</i> Distributed under the Boost Software License,
+  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt)</p>
+

doc/v2/definitions.html

@@ -0,0 +1,102 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - Definitions</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Definitions</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <dl class="definitions">
+      <dt><b><a name="arity">arity</a>:</b> The number of arguments accepted
+      by a function or member function. Unless otherwise specified, the
+      hidden "<code>this</code>" argument to member functions is not counted
+      when specifying arity</dt>
+
+      <dd><br>
+      </dd>
+
+      <dt><b><a name="ntbs">ntbs</a>:</b> Null-Terminated Byte String, or
+      `C'-string. C++ string literals are <strong>ntbs</strong>es. An
+      <strong>ntbs</strong> must never be null.</dt>
+
+      <dd><br>
+      </dd>
+
+      <dt><b><a name="raise">raise</a>:</b> Exceptions in Python are
+      "raised", not "thrown", as they are in C++. When this documentation
+      says that some Python exception is "raised" in the context of C++ code,
+      it means that the corresponding Python exception is set via the <a
+      href=
+      "http://www.python.org/doc/current/api/exceptionHandling.html">Python/'C'
+      API</a>, and <code><a href=
+      "errors.html#throw_error_already_set-spec">throw_error_already_set</a>()</code>
+      is called.</dt>
+
+      <dd><br>
+      </dd>
+
+      <dt><b><a name="POD">POD</a>:</b> A technical term from the C++
+      standard. Short for "Plain Ol'Data": A POD-struct is an aggregate class
+      that has no non-static data members of type pointer to member,
+      non-POD-struct, non-POD-union (or array of such types) or reference,
+      and has no user-defined copy assign- ment operator and no user-defined
+      destructor. Similarly, a POD-union is an aggregate union that has no
+      non-static data members of type pointer to member, non-POD-struct,
+      non-POD-union (or array of such types) or reference, and has no
+      user-defined copy assignment operator and no user-defined destructor. A
+      POD class is a class that is either a POD-struct or a POD-union. An
+      aggregate is an array or a class (clause 9) with no user-declared
+      constructors (12.1), no private or protected non-static data members
+      (clause 11), no base classes (clause 10), and no virtual functions
+      (10.3).</dt>
+
+      <dd><br>
+      </dd>
+
+      <dt><b><a name="ODR">ODR</a>:</b> The &quot;One Definition
+      Rule&quot;, which says that any entity in a C++ program must have the same definition in all translation units (object files) which make up a program.
+      </dt>
+
+      <dd><br>
+      </dd>
+
+
+    </dl>
+    <hr>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/dict.html

@@ -0,0 +1,152 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/dict.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;boost/python/dict.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#dict-spec">Class <code>dict</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#dict-spec-synopsis">Class <code>dict</code>
+              synopsis</a></dt>
+            </dl>
+          </dd>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example(s)</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p>Exposes a <a href=
+    "ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> for the Python
+    <a href=
+    "http://www.python.org/dev/doc/devel/lib/typesmapping.html">dict</a>
+    type.</p>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="dict-spec"></a>Class <code>dict</code></h3>
+
+    <p>Exposes the <a href=
+    "http://www.python.org/dev/doc/devel/lib/typesmapping.html">mapping
+    protocol</a> of Python's built-in <code>dict</code> type. The semantics
+    of the constructors and member functions defined below can be fully
+    understood by reading the <a href=
+    "ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> concept
+    definition. Since <code>dict</code> is publicly derived from <code><a
+    href="object.html#object-spec">object</a></code>, the public object
+    interface applies to <code>dict</code> instances as well.</p>
+
+    <h4><a name="dict-spec-synopsis"></a>Class <code>dict</code>
+    synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+   class dict : public object
+   {
+      dict();
+
+      template&lt; class T &gt;
+      dict(T const &amp; data);
+
+      // modifiers
+      void clear();
+      dict copy();
+
+      template &lt;class T1, class T2&gt;
+      tuple popitem();
+
+      template &lt;class T&gt;
+      object setdefault(T const &amp;k);
+
+      template &lt;class T1, class T2&gt;
+      object setdefault(T1 const &amp; k, T2 const &amp; d);
+
+      void update(object_cref E);
+ 
+      template&lt; class T &gt;
+      void update(T const &amp; E);
+
+      // observers
+      list values() const;
+    
+      object get(object_cref k) const;
+
+      template&lt;class T&gt;
+      object get(T const &amp; k) const;
+
+      object get(object_cref k, object_cref d) const;
+      object get(T1 const &amp; k, T2 const &amp; d) const;
+
+      bool has_key(object_cref k) const;
+
+      template&lt; class T &gt;
+      bool has_key(T const &amp; k) const;
+
+      list items() const;
+      object iteritems() const;
+      object iterkeys() const;
+      object itervalues() const;
+      list keys() const;
+  };
+}}
+</pre>
+
+    <h2><a name="examples"></a>Example</h2>
+<pre>
+using namespace boost::python;
+dict swap_object_dict(object target, dict d)
+{
+    dict result = extract&lt;dict&gt;(target.attr("__dict__"));
+    target.attr("__dict__") = d;
+    return result;
+}
+</pre>
+
+    <p>Revised 30 September, 2002</p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/docstring_options.html

@@ -0,0 +1,386 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+  <meta name="generator" content=
+  "HTML Tidy for Linux/x86 (vers 1st September 2004), see www.w3.org">
+  <meta http-equiv="Content-Type" content=
+  "text/html; charset=us-ascii">
+  <link rel="stylesheet" type="text/css" href="../boost.css">
+
+  <title>Boost.Python -
+  &lt;boost/python/docstring_options.hpp&gt;</title>
+</head>
+
+<body>
+  <table border="0" cellpadding="7" cellspacing="0" width="100%"
+  summary="header">
+    <tr>
+      <td valign="top" width="300">
+        <h3><a href="../../../../index.htm"><img height="86" width=
+        "277" alt="C++ Boost" src="../../../../boost.png" border=
+        "0"></a></h3>
+      </td>
+
+      <td valign="top">
+        <h1 align="center"><a href=
+        "../index.html">Boost.Python</a></h1>
+
+        <h2 align="center">Header
+        &lt;boost/python/docstring_options.hpp&gt;</h2>
+      </td>
+    </tr>
+  </table>
+  <hr>
+
+  <h2>Contents</h2>
+
+  <dl class="page-index">
+    <dt><a href="#introduction">Introduction</a></dt>
+
+    <dt><a href="#classes">Classes</a></dt>
+
+    <dd>
+      <dl class="page-index">
+        <dt><a href="#docstring_options-spec">Class
+        <code>docstring_options</code></a></dt>
+
+        <dd>
+          <dl class="page-index">
+            <dt><a href="#docstring_options-spec-synopsis">Class
+            <code>docstring_options</code> synopsis</a></dt>
+
+            <dt><a href="#docstring_options-spec-ctors">Class
+            <code>docstring_options</code> constructors</a></dt>
+
+            <dt><a href="#docstring_options-spec-dtors">Class
+            <code>docstring_options</code> destructors</a></dt>
+
+            <dt><a href="#docstring_options-spec-modifiers">Class
+            <code>docstring_options</code> modifiers</a></dt>
+          </dl>
+        </dd>
+      </dl>
+    </dd>
+
+    <dt><a href="#examples">Examples</a></dt>
+  </dl>
+  <hr>
+
+  <h2><a name="introduction" id=
+  "introduction"></a>Introduction</h2>
+
+  <p>Boost.Python supports user-defined docstrings with automatic
+  appending of C++ signatures. These features are enabled by
+  default. The <code>class docstring_options</code> is available to
+  selectively suppress the user-defined docstrings, signatures, or
+  both.</p>
+
+  <h2><a name="classes" id="classes"></a>Classes</h2>
+
+  <h3><a name="docstring_options-spec" id=
+  "docstring_options-spec"></a>Class
+  <code>docstring_options</code></h3>
+
+  <p>Controls the appearance of docstrings of wrapped functions and
+  member functions for the life-time of the instance. The instances
+  are noncopyable to eliminate the possibility of surprising side
+  effects.</p>
+
+  <h4><a name="docstring_options-spec-synopsis" id=
+  "docstring_options-spec-synopsis"></a>Class
+  <code>docstring_options</code> synopsis</h4>
+  <pre>
+namespace boost { namespace python {
+
+    class docstring_options : boost::noncopyable
+    {
+      public:
+          docstring_options(bool show_all=true);
+
+          docstring_options(bool show_user_defined, bool show_signatures);
+
+          docstring_options(bool show_user_defined, bool show_py_signatures, bool show_cpp_signatures);
+
+          ~docstring_options();
+
+          void
+          disable_user_defined();
+
+          void
+          enable_user_defined();
+
+          void
+          disable_signatures();
+
+          void
+          enable_signatures();
+
+          void
+          disable_py_signatures();
+
+          void
+          enable_py_signatures();
+
+          void
+          disable_cpp_signatures();
+
+          void
+          enable_cpp_signatures();
+
+          void
+          disable_all();
+
+          void
+          enable_all();
+    };
+
+}}
+</pre>
+
+  <h4><a name="docstring_options-spec-ctors" id=
+  "docstring_options-spec-ctors"></a>Class
+  <code>docstring_options</code> constructors</h4>
+  <pre>
+docstring_options(bool show_all=true);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Effects:</b> Constructs a <code>docstring_options</code>
+    object which controls the appearance of function and
+    member-function docstrings defined in the code that follows. If
+    <code>show_all</code> is <code>true</code>, both the
+    user-defined docstrings and the automatically generated Python and C++
+    signatures are shown. If <code>show_all</code> is
+    <code>false</code> the <code>__doc__</code> attributes are
+    <code>None</code>.</dt>
+  </dl>
+  <pre>
+docstring_options(bool show_user_defined, bool show_signatures);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Effects:</b> Constructs a <code>docstring_options</code>
+    object which controls the appearance of function and
+    member-function docstrings defined in the code that follows.
+    Iff <code>show_user_defined</code> is <code>true</code>, the
+    user-defined docstrings are shown. Iff
+    <code>show_signatures</code> is <code>true</code>, Python and C++
+    signatures are automatically added. If both
+    <code>show_user_defined</code> and <code>show_signatures</code>
+    are <code>false</code>, the <code>__doc__</code> attributes are
+    <code>None</code>.</dt>
+  </dl>
+  <pre>
+docstring_options(bool show_user_defined, bool show_py_signatures, bool show_cpp_signatures);
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Effects:</b> Constructs a <code>docstring_options</code>
+    object which controls the appearance of function and
+    member-function docstrings defined in the code that follows.
+    Iff <code>show_user_defined</code> is <code>true</code>, the
+    user-defined docstrings are shown. Iff
+    <code>show_py_signatures</code> is <code>true</code>, Python 
+    signatures are automatically added. Iff 
+    <code>show_cpp_signatures</code> is <code>true</code>, C++ 
+    signatures are automatically added. If all parameters are
+    <code>false</code>, the <code>__doc__</code> attributes are
+    <code>None</code>.</dt>
+  </dl>
+
+  <h4><a name="docstring_options-spec-dtors" id=
+  "docstring_options-spec-dtors"></a>Class
+  <code>docstring_options</code> destructors</h4>
+  <pre>
+~docstring_options();
+</pre>
+
+  <dl class="function-semantics">
+    <dt><b>Effects:</b> Restores the previous state of the
+    docstring options. In particular, if
+    <code>docstring_options</code> instances are in nested C++
+    scopes the settings effective in the enclosing scope are
+    restored. If the last <code>docstring_options</code> instance
+    goes out of scope the default "all on" settings are
+    restored.</dt>
+  </dl>
+
+  <h4><a name="docstring_options-spec-modifiers" id=
+  "docstring_options-spec-modifiers"></a>Class
+  <code>docstring_options</code> modifier functions</h4>
+  <pre>
+void disable_user_defined();
+void enable_user_defined();
+void disable_signatures();
+void enable_signatures();
+void disable_py_signatures();
+void enable_py_signatures();
+void disable_cpp_signatures();
+void enable_cpp_signatures();
+void disable_all();
+void enable_all();
+</pre>
+
+  <dl class="function-semantics">
+    <dt>These member functions dynamically change the appearance of
+    docstrings in the code that follows. The
+    <code>*_user_defined()</code> and <code>*_signatures()</code>
+    member functions are provided for fine-grained control. The
+    <code>*_all()</code> member functions are convenient shortcuts
+    to manipulate all settings simultaneously.</dt>
+  </dl>
+
+  <h2><a name="examples" id="examples"></a>Examples</h2>
+
+  <h4>Docstring options defined at compile time</h4>
+  <pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/docstring_options.hpp&gt;
+
+void foo() {}
+
+BOOST_PYTHON_MODULE(demo)
+{
+    using namespace boost::python;
+    docstring_options doc_options(DEMO_DOCSTRING_SHOW_ALL);
+    def("foo", foo, "foo doc");
+}
+</pre>If compiled with <code>-DDEMO_DOCSTRING_SHOW_ALL=true</code>:
+  <pre>
+&gt;&gt;&gt; import demo
+&gt;&gt;&gt; print demo.foo.__doc__
+foo() -&gt; None : foo doc
+C++ signature:
+    foo(void) -&gt; void
+</pre>If compiled with
+<code>-DDEMO_DOCSTRING_SHOW_ALL=false</code>:
+  <pre>
+&gt;&gt;&gt; import demo
+&gt;&gt;&gt; print demo.foo.__doc__
+None
+</pre>
+
+  <h4>Selective suppressions</h4>
+  <pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/args.hpp&gt;
+#include &lt;boost/python/docstring_options.hpp&gt;
+
+int foo1(int i) { return i; }
+int foo2(long l) { return static_cast&lt;int&gt;(l); }
+int foo3(float f) { return static_cast&lt;int&gt;(f); }
+int foo4(double d) { return static_cast&lt;int&gt;(d); }
+
+BOOST_PYTHON_MODULE(demo)
+{
+    using namespace boost::python;
+    docstring_options doc_options;
+    def("foo1", foo1, arg("i"), "foo1 doc");
+    doc_options.disable_user_defined();
+    def("foo2", foo2, arg("l"), "foo2 doc");
+    doc_options.disable_signatures();
+    def("foo3", foo3, arg("f"), "foo3 doc");
+    doc_options.enable_user_defined();
+    def("foo4", foo4, arg("d"), "foo4 doc");
+    doc_options.enable_py_signatures();
+    def("foo5", foo4, arg("d"), "foo5 doc");
+    doc_options.disable_py_signatures();
+    doc_options.enable_cpp_signatures();
+    def("foo6", foo4, arg("d"), "foo6 doc");
+}
+</pre>Python code:
+  <pre>
+&gt;&gt;&gt; import demo
+&gt;&gt;&gt; print demo.foo1.__doc__
+foo1( (int)i) -&gt; int : foo1 doc
+C++ signature:
+    foo1(int i) -&gt; int
+&gt;&gt;&gt; print demo.foo2.__doc__
+foo2( (int)l) -&gt; int : 
+C++ signature:
+    foo2(long l) -&gt; int
+&gt;&gt;&gt; print demo.foo3.__doc__
+None
+&gt;&gt;&gt; print demo.foo4.__doc__
+foo4 doc
+&gt;&gt;&gt; print demo.foo5.__doc__
+foo5( (float)d) -&gt; int : foo5 doc
+&gt;&gt;&gt; print demo.foo6.__doc__
+foo6 doc
+C++ signature:
+    foo6(double d) -&gt; int
+</pre>
+
+  <h4>Wrapping from multiple C++ scopes</h4>
+  <pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/args.hpp&gt;
+#include &lt;boost/python/docstring_options.hpp&gt;
+
+int foo1(int i) { return i; }
+int foo2(long l) { return static_cast&lt;int&gt;(l); }
+
+int bar1(int i) { return i; }
+int bar2(long l) { return static_cast&lt;int&gt;(l); }
+
+namespace {
+
+    void wrap_foos()
+    {
+        using namespace boost::python;
+        // no docstring_options here
+        //   -&gt; settings from outer C++ scope are in effect
+        def("foo1", foo1, arg("i"), "foo1 doc");
+        def("foo2", foo2, arg("l"), "foo2 doc");
+    }
+
+    void wrap_bars()
+    {
+        using namespace boost::python;
+        bool show_user_defined = true;
+        bool show_signatures = false;
+        docstring_options doc_options(show_user_defined, show_signatures);
+        def("bar1", bar1, arg("i"), "bar1 doc");
+        def("bar2", bar2, arg("l"), "bar2 doc");
+    }
+}
+
+BOOST_PYTHON_MODULE(demo)
+{
+    boost::python::docstring_options doc_options(false);
+    wrap_foos();
+    wrap_bars();
+}
+</pre>Python code:
+  <pre>
+&gt;&gt;&gt; import demo
+&gt;&gt;&gt; print demo.foo1.__doc__
+None
+&gt;&gt;&gt; print demo.foo2.__doc__
+None
+&gt;&gt;&gt; print demo.bar1.__doc__
+bar1 doc
+&gt;&gt;&gt; print demo.bar2.__doc__
+bar2 doc
+</pre>
+
+  <h4>See also: <code>boost/libs/python/test/docstring.cpp</code>
+  and <code>docstring.py</code></h4>
+
+  <p>Revised 
+  <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+   16 January, 2006 
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" --></p>
+
+  <p><i>&copy; Copyright <a href=
+  "http://www.boost.org/people/ralf_w_grosse_kunstleve.htm">Ralf W.
+  Grosse-Kunstleve</a> 2006.</i></p>
+</body>
+</html>

doc/v2/enum.html

@@ -0,0 +1,234 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/enum.hpp&gt;</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;boost/python/enum.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#enum_-spec">Class template
+          <code>enum_</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#enum_-spec-synopsis">Class template <code>enum_</code>
+              synopsis</a></dt>
+
+              <dt><a href="#enum_-spec-ctors">Class template <code>enum_</code>
+              constructors</a></dt>
+
+              <dt><a href="#enum_-spec-modifiers">Class template <code>enum_</code>
+              modifier functions</a></dt>
+            </dl>
+          </dd>
+
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example(s)</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><code>&lt;boost/python/enum.hpp&gt;</code> defines the
+    interface through which users expose their C++ enumeration types
+    to Python. It declares the
+    <code>enum_</code> class template, which is parameterized on the
+    enumeration type being exposed. </p>
+
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="enum_-spec"></a>Class template
+    <code>enum_&lt;T&gt;</code></h3>
+
+    <p>Creates a Python class derived from Python's <code>int</code>
+    type which is associated with the C++ type passed as its first
+    parameter. 
+
+    <h4><a name="enum_-spec-synopsis"></a>Class template <code>enum_</code>
+    synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+  template &lt;class T&gt;
+  class enum_ : public <a href="object.html#object-spec">object</a>
+  {
+    enum_(char const* name, char const* doc = 0);
+    enum_&lt;T&gt;&amp; value(char const* name, T);
+    enum_&lt;T&gt;&amp; export_values();
+  };
+}}
+</pre>
+
+    <h4><a name="enum_-spec-ctors"></a>Class template <code>enum_</code>
+    constructors</h4>
+<pre>
+enum_(char const* name, char const* doc=0);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> <code>name</code> is an <a href=
+      "definitions.html#ntbs">ntbs</a> which conforms to Python's <a href=
+      "http://www.python.org/doc/current/ref/identifiers.html">identifier
+      naming rules</a>. 
+
+      <dt><b>Effects:</b> Constructs an <code>enum_</code> object
+      holding a Python extension type derived from <code>int</code>
+      which is named <code>name</code>. The
+      <code>name</code>d attribute of the <a href=
+      "scope.html#introduction">current scope</a> is bound to the new
+      extension type.</dt>
+    </dl>
+
+    <h4><a name="enum_-spec-modifiers"></a>Class template
+    <code>enum_</code> modifier functions</h4>
+<pre>
+inline enum_&lt;T&gt;&amp; value(char const* name, T x);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> <code>name</code> is an <a href=
+      "definitions.html#ntbs">ntbs</a> which conforms to Python's <a
+      href=
+      "http://www.python.org/doc/current/ref/identifiers.html">identifier
+      naming rules</a>.
+
+      <dt><b>Effects:</b> adds an instance of the wrapped enumeration
+      type with value <code>x</code> to the type's dictionary as the
+      <code>name</code>d attribute.</dt>
+
+      <dt><b>Returns:</b> <code>*this</code></dt>
+
+    </dl>
+
+<pre>
+inline enum_&lt;T&gt;&amp; export_values();
+</pre>
+
+    <dl class="function-semantics">
+
+      <dt><b>Effects:</b> sets attributes in the current <a
+        href="scope.html#scope-spec"><code>scope</code></a> with the
+        same names and values as all enumeration values exposed so far
+        by calling <code>value()</code>.</dt>
+
+      <dt><b>Returns:</b> <code>*this</code></dt>
+
+    </dl>
+
+    <h2><a name="examples"></a>Example(s)</h2>
+
+    <p>C++ module definition
+<pre>
+#include &lt;boost/python/enum.hpp&gt;
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/module.hpp&gt;
+
+using namespace boost::python;
+
+enum color { red = 1, green = 2, blue = 4 };
+
+color identity_(color x) { return x; }
+
+BOOST_PYTHON_MODULE(enums)
+{
+    enum_&lt;color&gt;(&quot;color&quot;)
+        .value(&quot;red&quot;, red)
+        .value(&quot;green&quot;, green)
+        .export_values()
+        .value(&quot;blue&quot;, blue)
+        ;
+    
+    def(&quot;identity&quot;, identity_);
+}
+</pre>
+    <p>Interactive Python:
+<pre>
+&gt;&gt;&gt; from enums import *
+
+&gt;&gt;&gt; identity(red)
+enums.color.red
+
+&gt;&gt;&gt; identity(color.red)
+enums.color.red
+
+&gt;&gt;&gt; identity(green)
+enums.color.green
+
+&gt;&gt;&gt; identity(color.green)
+enums.color.green
+
+&gt;&gt;&gt; identity(blue)
+Traceback (most recent call last):
+  File &quot;&lt;stdin&gt;&quot;, line 1, in ?
+NameError: name blue' is not defined
+
+&gt;&gt;&gt; identity(color.blue)
+enums.color.blue
+
+&gt;&gt;&gt; identity(color(1))
+enums.color.red
+
+&gt;&gt;&gt; identity(color(2))
+enums.color.green
+
+&gt;&gt;&gt; identity(color(3))
+enums.color(3)
+
+&gt;&gt;&gt; identity(color(4))
+enums.color.blue
+
+&gt;&gt;&gt; identity(1)
+Traceback (most recent call last):
+  File &quot;&lt;stdin&gt;&quot;, line 1, in ?
+TypeError: bad argument type for built-in operation
+</pre>
+    <hr>
+
+    Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 December, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+     
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/errors.html

@@ -0,0 +1,289 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/errors.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;boost/python/errors.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#error_already_set-spec">Class
+          <code>error_already_set</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#error_already_set-spec-synopsis">Class
+              <code>error_already_set</code> synopsis</a></dt>
+            </dl>
+          </dd>
+        </dl>
+      </dd>
+
+      <dt><a href="#functions">Functions</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#handle_exception-spec">handle_exception</a></dt>
+
+          <dt><a href="#expect_non_null-spec">expect_non_null</a></dt>
+
+          <dt><a href=
+          "#throw_error_already_set-spec">throw_error_already_set</a></dt>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Examples</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><code>&lt;boost/python/errors.hpp&gt;</code> provides types and
+    functions for managing and translating between Python and C++ exceptions.
+    This is relatively low-level functionality that is mostly used internally
+    by Boost.Python. Users should seldom need it.</p>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="error_already_set-spec"></a>Class
+    <code>error_already_set</code></h3>
+
+    <p><code>error_already_set</code> is an exception type which can be
+    thrown to indicate that a Python error has occurred. If thrown, the
+    precondition is that <a href=
+    "http://www.python.org/doc/2.2/api/exceptionHandling.html#l2h-71">PyErr_Occurred()</a>
+    returns a value convertible to <code>true</code>. Portable code shouldn't
+    throw this exception type directly, but should instead use <code><a href=
+    "#throw_error_already_set-spec">throw_error_already_set</a>()</code>,
+    below.</p>
+
+    <h4><a name="error_already_set-spec-synopsis"></a>Class error_already_set
+    synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+    class error_already_set {};
+}}
+</pre>
+
+    <h2><a name="functions"></a>Functions</h2>
+<pre>
+<a name=
+"handle_exception-spec">template &lt;class T&gt; bool handle_exception</a>(T f) throw();
+
+void handle_exception() throw();
+</pre>
+
+    <dl class="handle_exception-semantics">
+      <dt><b>Requires:</b> The first form requires that the expression
+      <code><a href=
+      "../../../../doc/html/functionN.html">function0</a>&lt;void&gt;(f)</code>
+      is valid. The second form requires that a C++ exception is currently
+      being handled (see section 15.1 in the C++ standard).</dt>
+
+      <dt><b>Effects:</b> The first form calls <code>f()</code> inside a
+      <code>try</code> block which first attempts to use all registered <a
+      href="exception_translator.html">exception translators</a>. If none of
+      those translates the exception, the <code>catch</code> clauses then set
+      an appropriate Python exception for the C++ exception caught, returning
+      <code>true</code> if an exception was thrown, <code>false</code>
+      otherwise. The second form passes a function which rethrows the
+      exception currently being handled to the first form.</dt>
+
+      <dt><b>Postconditions:</b> No exception is being handled</dt>
+
+      <dt><b>Throws:</b> nothing</dt>
+
+      <dt><b>Rationale:</b> At inter-language boundaries it is important to
+      ensure that no C++ exceptions escape, since the calling language
+      usually doesn't have the equipment necessary to properly unwind the
+      stack. Use <code>handle_exception</code> to manage exception
+      translation whenever your C++ code is called directly from the Python
+      API. This is done for you automatically by the usual function wrapping
+      facilities: <code><a href=
+      "make_function.html#make_function-spec">make_function</a>()</code>,
+      <code><a href=
+      "make_function.html#make_constructor-spec">make_constructor</a>()</code>,
+      <code><a href="def.html#class_-spec-modifiers">def</a>()</code> and <code><a href=
+      "class.html#def-spec">class_::def</a>()</code>. The second form can be
+      more convenient to use (see the <a href="#examples">example</a> below),
+      but various compilers have problems when exceptions are rethrown from
+      within an enclosing <code>try</code> block.</dt>
+    </dl>
+<pre>
+<a name=
+"expect_non_null-spec">template &lt;class T&gt; T* expect_non_null(T* x);</a>
+</pre>
+
+    <dl class="expect_non_null-semantics">
+      <dt><b>Returns:</b> <code>x</code></dt>
+
+      <dt><b>Throws:</b> <code><a href=
+      "#error_already_set-spec">error_already_set</a>()</code> iff <code>x ==
+      0</code>.</dt>
+
+      <dt><b>Rationale:</b> Simplifies error-handling when calling functions
+      in the <a href="http://www.python.org/doc/2.2/api/api.html">Python/C
+      API</a> which return 0 on error.</dt>
+    </dl>
+<pre>
+<a name="throw_error_already_set-spec">void throw_error_already_set();</a>
+</pre>
+
+    <dl class="throw_error_already_set-semantics">
+      <dt><b>Effects:</b> <code>throw&nbsp;<a href=
+      "#error_already_set-spec">error_already_set</a>();</code></dt>
+    </dl>
+
+    <dl>
+      <dt><b>Rationale:</b> Many platforms and compilers are not able to
+      consistently catch exceptions thrown across shared library boundaries.
+      Using this function from the Boost.Python library ensures that the
+      appropriate <code>catch</code> block in <code><a href=
+      "#handle_exception-spec">handle_exception</a>()</code> can catch the
+      exception.</dt>
+    </dl>
+
+    <h2><a name="examples"></a>Examples</h2>
+<pre>
+#include &lt;string&gt;
+#include &lt;boost/python/errors.hpp&gt;
+#include &lt;boost/python/object.hpp&gt;
+#include &lt;boost/python/handle.hpp&gt;
+
+// Returns a std::string which has the same value as obj's "__name__"
+// attribute.
+std::string get_name(boost::python::object obj)
+{
+   // throws if there's no __name__ attribute
+   PyObject* p = boost::python::expect_non_null(
+      PyObject_GetAttrString(obj.ptr(), "__name__"));
+
+   char const* s = PyString_AsString(p);
+   if (s != 0) 
+        Py_DECREF(p);
+
+   // throws if it's not a Python string
+   std::string result(
+      boost::python::expect_non_null(
+         PyString_AsString(p)));
+
+   Py_DECREF(p); // Done with p
+   
+   return result;
+}
+
+//
+// Demonstrate form 1 of handle_exception
+//
+
+// Place into result a Python Int object whose value is 1 if a and b have
+// identical "__name__" attributes, 0 otherwise.
+void same_name_impl(PyObject*&amp; result, boost::python::object a, boost::python::object b)
+{
+   result = PyInt_FromLong(
+      get_name(a) == get_name(a2));
+}
+
+object borrowed_object(PyObject* p)
+{
+   return boost::python::object(
+        boost::python::handle&lt;&gt;(
+             boost::python::borrowed(a1)));
+}
+
+// This is an example Python 'C' API interface function
+extern "C" PyObject*
+same_name(PyObject* args, PyObject* keywords)
+{
+   PyObject* a1;
+   PyObject* a2;
+   PyObject* result = 0;
+
+   if (!PyArg_ParseTuple(args, const_cast&lt;char*&gt;("OO"), &amp;a1, &amp;a2))
+      return 0;
+   
+   // Use boost::bind to make an object compatible with
+   // boost::Function0&lt;void&gt;
+   if (boost::python::handle_exception(
+         boost::bind&lt;void&gt;(same_name_impl, boost::ref(result), borrowed_object(a1), borrowed_object(a2))))
+   {
+      // an exception was thrown; the Python error was set by
+      // handle_exception()
+      return 0;
+   }
+
+   return result;
+}
+
+//
+// Demonstrate form 2 of handle_exception. Not well-supported by all
+// compilers.
+//
+extern "C" PyObject*
+same_name2(PyObject* args, PyObject* keywords)
+{
+   PyObject* a1;
+   PyObject* a2;
+   PyObject* result = 0;
+
+   if (!PyArg_ParseTuple(args, const_cast&lt;char*&gt;("OO"), &amp;a1, &amp;a2))
+      return 0;
+
+   try {
+      return PyInt_FromLong(
+         get_name(borrowed_object(a1)) == get_name(borrowed_object(a2)));
+   }
+   catch(...)
+   {
+      // If an exception was thrown, translate it to Python
+      boost::python::handle_exception();
+      return 0;
+   }
+}
+</pre>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/exception_translator.html

@@ -0,0 +1,150 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python -
+    &lt;boost/python/exception_translator.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header
+          &lt;boost/python/exception_translator.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#functions">Functions</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href=
+          "#register_exception_translator-spec">register_exception_translator</a></dt>
+        </dl>
+      </dd>
+
+      <dt><a href="#examples">Example(s)</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p>As described <a href="errors.html#handle_exception-spec">here</a>, it
+    is important to make sure that exceptions thrown by C++ code do not pass
+    into the Python interpreter core. By default, Boost.Python translates all
+    C++ exceptions thrown by wrapped functions and module init functions into
+    Python, but the default translators are extremely limited: most C++
+    exceptions will appear in Python as a <a href=
+    "http://www.python.org/doc/current/lib/module-exceptions.html">RuntimeError</a>
+    exception whose representation is
+    <code>'Unidentifiable&nbsp;C++&nbsp;Exception'</code>. To produce better
+    error messages, users can register additional exception translators as
+    described below.</p>
+
+    <h2><a name="functions"></a>Functions</h2>
+
+<h3><code><a name="register_exception_translator-spec">register_exception_translator</a></code></h3>
+
+<pre>
+<a name="register_exception_translator-spec">template&lt;class ExceptionType, class Translate&gt;</a>
+void register_exception_translator(Translate translate);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b></dt>
+
+      <dd>
+        <code>Translate</code> is <a href=
+        "../../../utility/CopyConstructible.html">Copyconstructible</a>, and
+        the following code must be well-formed: 
+<pre>
+void f(ExceptionType x) { translate(x); }
+</pre>
+        The expression <code>translate(x)</code> must either throw a C++
+        exception, or a subsequent call to <code><a href=
+        "http://www.python.org/doc/current/api/exceptionHandling.html">PyErr_Occurred</a>()</code>
+        must return 1.
+      </dd>
+
+      <p>
+
+      <dt><b>Effects:</b> Adds a copy of <code>translate</code> to the sequence of
+      exception translators tried when Boost.Python catches an exception that
+      is about to pass into Python's core interpreter. The new translator
+      will get "first shot" at translating all exceptions matching the catch
+      clause shown above. Any subsequently-registered translators will be
+      allowed to translate the exception earlier. A translator which cannot
+      translate a given C++ exception can re-throw it, and it will be handled
+      by a translator which was registered earlier (or by the default
+      translator).</dt>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+<pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/exception_translator.hpp&gt;
+#include &lt;exception&gt;
+
+struct my_exception : std::exception
+{
+  char const* what() throw() { return "One of my exceptions"; }
+};
+
+void translate(my_exception const&amp; e)
+{
+    // Use the Python 'C' API to set up an exception object
+    PyErr_SetString(PyExc_RuntimeError, e.what());
+}
+
+void something_which_throws()
+{
+    ...
+    throw my_exception();
+    ...
+}
+
+BOOST_PYTHON_MODULE(exception_translator_ext)
+{
+  using namespace boost::python;
+  register_exception_translator&lt;my_exception&gt;(&amp;translate);
+  
+  def("something_which_throws", something_which_throws);
+}
+</pre>
+    <br>
+     <br>
+     
+    <hr>
+
+    <p>Revised 03 October, 2002</p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/exec.html

@@ -0,0 +1,163 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/exec.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;boost/python/exec.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#functions">Functions</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#eval-spec"><code>eval</code></a></dt>
+          <dt><a href="#exec-spec"><code>exec</code></a></dt>
+          <dt><a href="#exec_file-spec"><code>exec_file</code></a></dt>
+        </dl>
+      </dd>
+      <dt><a href="#examples">Examples</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p>Exposes a mechanism for embedding the python interpreter into C++ code.</p>
+
+    <h2><a name="functions"></a>Functions</h2>
+
+    <h3><a name="eval-spec"></a><code>eval</code></h3>
+    <pre>
+object eval(str expression,
+            object globals = object(),
+            object locals = object());
+    </pre>
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+        Evaluate Python expression from <code>expression</code> in the context 
+        specified by the dictionaries <code>globals</code> and <code>locals</code>.
+      </dt>
+      <dt><b>Returns:</b>
+        An instance of <a href="object.html#object-spec">object</a> 
+        which holds the value of the expression.
+      </dt>
+    </dl>
+
+    <h3><a name="exec-spec"></a><code>exec</code></h3>
+    <pre>
+object exec(str code,
+            object globals = object(),
+            object locals = object());
+    </pre>
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+        Execute Python source code from <code>code</code> in the context 
+        specified by the dictionaries <code>globals</code> and <code>locals</code>.
+      </dt>
+      <dt><b>Returns:</b>
+        An instance of <a href="object.html#object-spec">object</a> 
+        which holds the result of executing the code.
+      </dt>
+    </dl>
+
+    <h3><a name="exec_file-spec"></a><code>exec_file</code></h3>
+    <pre>
+object exec_file(str filename,
+                 object globals = object(),
+                 object locals = object());
+    </pre>
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+        Execute Python source code from the file named by <code>filename</code>
+        in the context specified by the  dictionaries <code>globals</code> and 
+        <code>locals</code>.
+      </dt>
+      <dt><b>Returns:</b>
+        An instance of <a href="object.html#object-spec">object</a> 
+        which holds the result of executing the code.
+      </dt>
+    </dl>
+
+    <h2><a name="examples"></a>Examples</h2>
+
+    <para>The following example demonstrates the use of <function>import</function>
+      and <function>exec</function> to define a function in python, and later call
+      it from within C++.</para>
+
+<pre>
+#include &lt;iostream&gt;
+#include &lt;string&gt;
+
+using namespace boost::python;
+
+void greet()
+{ 
+  // Retrieve the main module.
+  object main = import("__main__");
+  
+  // Retrieve the main module's namespace
+  object global(main.attr("__dict__"));
+
+  // Define greet function in Python.
+  object result = exec(
+    "def greet():                   \n"
+    "   return 'Hello from Python!' \n",
+    global, global);
+
+  // Create a reference to it.
+  object greet = global["greet"];
+
+  // Call it.
+  std::string message = extract&lt;std::string&gt;(greet());
+  std::cout &lt;&lt; message &lt;&lt; std::endl;
+}
+</pre>
+
+    <para>Instead of embedding the python script into a string,
+      we could also store it in an a file...</para>
+
+<pre>
+def greet():
+   return 'Hello from Python!'
+</pre>
+    <para>... and execute that instead.</para>
+<pre>
+  // ...
+  // Load the greet function from a file.
+  object result = exec_file(script, global, global);
+  // ...
+}
+</pre>
+    <p>Revised 01 November, 2005</p>
+
+    <p><i>&copy; Copyright Stefan Seefeld 2005.</i></p>
+  </body>
+</html>
+

doc/v2/extract.html

@@ -0,0 +1,232 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/extract.hpp&gt;</title>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Header &lt;boost/python/extract.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#extract-spec">Class <code>extract</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#extract-spec-synopsis">Class <code>extract</code>
+              synopsis</a></dt>
+
+              <dt><a href="#extract-spec-ctors">Class <code>extract</code>
+              constructors and destructor</a></dt>
+
+              <dt><a href="#extract-spec-observers">Class
+              <code>extract</code> observer functions</a></dt>
+            </dl>
+          </dd>
+        </dl>
+      </dd>
+
+
+      <dt><a href="#examples">Example</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p>Exposes a mechanism for extracting C++ object values from
+    generalized Python objects. Note that
+    <code>extract&lt;</code>...<code>&gt;</code> can also be used to
+    &quot;downcast&quot; an <a
+    href="object.html#object-spec">object</a> to some specific <a
+    href="ObjectWrapper.html#ObjectWrapper-concept">ObjectWrapper</a>. Because
+    invoking a mutable python type with an argument of the same type
+    (e.g. <code>list([1,2])</code> typically makes a <em>copy</em> of
+    the argument object, this may be the only way to access the <a
+    href="ObjectWrapper.html#ObjectWrapper-concept">ObjectWrapper</a>'s
+    interface on the original object.
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="extract-spec"></a>Class template <code>extract</code></h3>
+
+    <p><code>extract&lt;T&gt;</code> can be used to extract a value of
+    an arbitrary C++ type from an instance of <code><a
+    href="object.html#object-spec">object</a></code>. Two usages are supported:
+<ol>
+<li><b><code>extract&lt;T&gt;(o)</code></b> is a temporary object
+which is implicitly convertible to <code>T</code> (explicit conversion
+is also available through the object's function-call
+operator). However, if no conversion is available which can convert
+<code>o</code> to an object of type <code>T</code>, a Python
+<code>TypeError</code> exception will be <a
+href="definitions.html#raise">raised</a>.
+
+<li><b><code>extract&lt;T&gt; x(o);</code></b> constructs an extractor
+whose <code>check()</code> member function can be used to ask whether
+a conversion is available without causing an exception to be thrown.
+</ol>
+
+    <h4><a name="extract-spec-synopsis"></a>Class template <code>extract</code>
+    synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+  template &lt;class T&gt;
+  struct extract
+  {
+      typedef <i>unspecified</i> result_type;
+
+      extract(PyObject*);
+      extract(object const&amp;);
+
+      result_type operator()() const;
+      operator result_type() const;
+
+      bool check() const;
+  };
+}}
+</pre>
+
+    <h4><a name="extract-spec-ctors"></a>Class <code>extract</code>
+    constructors and destructor</h4>
+<pre>
+extract(PyObject* p);
+extract(object const&amp;);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Requires:</b> The first form requires that <code>p</code> is non-null.</dt>
+
+      <dt><b>Effects:</b>Stores a pointer to the Python object managed
+      by its constructor argument. In particular, the reference
+      count of the object is not incremented. The onus is on the user
+      to be sure it is not destroyed before the extractor's conversion
+      function is called.</dt>
+    </dl>
+
+    <h4><a name="extract-spec-observers"></a>Class <code>extract</code>
+    observer functions</h4>
+<pre>
+result_type operator()() const;
+operator result_type() const;
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b> Converts the stored pointer to
+      <code>result_type</code>, which is either <code>T</code> or
+      <code>T const&amp;</code>.
+      </dt>
+
+      <dt><b>Returns:</b> An object of <code>result_type</code>
+      corresponding to the one referenced by the stored pointer.</dt>
+
+      <dt><b>Throws:</b> <code><a
+      href="errors.html#error_already_set-spec">error_already_set</a></code>
+      and sets a <code>TypeError</code> if no such conversion is
+      available. May also emit other unspecified exceptions thrown by
+      the converter which is actually used.</dt>
+    </dl>
+
+<pre>
+bool check() const;
+</pre>
+
+    <dl class="function-semantics">
+
+      <dt><b>Postconditions:</b> None. In particular, note that a
+      return value of <code>true</code> does not preclude an exception
+      being thrown from <code>operator result_type()</code> or
+      <code>operator()()</code>.</dt>
+
+      <dt><b>Returns:</b> <code>false</code> <i>only</i> if no conversion from the
+      stored pointer to <code>T</code> is available.</dt>
+
+    </dl>
+
+
+    <h2><a name="examples"></a>Examples</h2>
+
+<pre>
+#include &lt;cstdio&gt;
+using namespace boost::python;
+int Print(str s)
+{ 
+   // extract a C string from the Python string object
+   char const* c_str = extract&lt;char const*&gt;(s);
+
+   // Print it using printf
+   std::printf(&quot;%s\n&quot;, c_str);
+
+   // Get the Python string's length and convert it to an int
+   return extract&lt;int&gt;(s.attr(&quot;__len__&quot;)())
+}
+</pre>
+
+The following example shows how extract can be used along with
+<code><a
+href="class.html#class_-spec">class_</a>&lt;</code>...<code>&gt;</code>
+to create and access an instance of a wrapped C++ class.
+
+<pre>
+struct X
+{
+   X(int x) : v(x) {}
+   int value() { return v; }
+ private:
+   int v;
+};
+
+BOOST_PYTHON_MODULE(extract_ext)
+{
+    object x_class(
+       class_&lt;X&gt;(&quot;X&quot;, init&lt;int&gt;())
+          .def(&quot;value&quot;, &amp;X::value))
+          ;
+        
+    // Instantiate an X object through the Python interface. 
+    // Its lifetime is now managed by x_obj.
+    object x_obj = x_class(3);
+
+    // Get a reference to the C++ object out of the Python object
+    X&amp; x = extract&lt;X&amp;&gt;(x_obj);
+    assert(x.value() == 3);
+}
+</pre>
+    <p>Revised 15 November, 2002</p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
+  </body>
+</html>
+

doc/v2/faq.html

@@ -0,0 +1,861 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Cygwin (vers 1st April 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - FAQ</title>
+  </head>
+
+  <body link="#0000ff" vlink="#800080">
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 align="center"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 align="center">Frequently Asked Questions (FAQs)</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <dl class="page-index">
+
+      <dt><a href="#funcptr">How can I wrap a function which takes a
+      function pointer as an argument?</a><dd>
+
+      <dt><a href="#dangling">I'm getting the "attempt to return dangling
+      reference" error. What am I doing wrong?</a></dt>
+
+      <dt><a href="#question1">Is return_internal_reference
+      efficient?</a></dt>
+
+      <dt><a href="#question2">How can I wrap functions which take C++
+      containers as arguments?</a></dt>
+
+      <dt><a href="#c1204">fatal error C1204:Compiler limit:internal
+      structure overflow</a></dt>
+
+      <dt><a href="#debugging">How do I debug my Python extensions?</a></dt>
+
+      <dt><a href="#imul">Why doesn't my <code>*=</code> operator
+      work?</a></dt>
+
+      <dt><a href="#macosx">Does Boost.Python work with Mac OS X?</a></dt>
+
+      <dt><a href="#xref">How can I find the existing PyObject that holds a
+      C++ object?</a></dt>
+
+      <dt><a href="#ownership">How can I wrap a function which needs to take
+      ownership of a raw pointer?</a></dt>
+
+      <dt><a href="#slow_compilation">Compilation takes too much time and eats too much memory!
+      What can I do to make it faster?</a></dt>
+
+      <dt><a href="#packages">How do I create sub-packages using Boost.Python?</a></dt>
+
+      <dt><a href="#msvcthrowbug"
+      >error C2064: term does not evaluate to a function taking 2 arguments</a>
+      </dt>
+
+      <dt><a href="#custom_string"
+      >How can I automatically convert my custom string type to
+       and from a Python string?</a></dt>
+
+      <dt><a href="#topythonconversionfailed">Why is my automatic to-python conversion not being
+      found?</a></dt>
+
+      <dt><a href="#threadsupport">Is Boost.Python thread-aware/compatible with multiple interpreters?</a></dt>
+    </dl>
+    <hr>
+
+    <h2><a name="funcptr">How can I wrap a function which takes a
+      function pointer as an argument?</a></h2>
+
+    If what you're trying to do is something like this:
+<pre>
+typedef boost::function&lt;void (string s) &gt; funcptr;
+
+void foo(funcptr fp)
+{
+    fp(&quot;hello,world!&quot;);
+}
+
+BOOST_PYTHON_MODULE(test)
+{
+    def(&quot;foo&quot;,foo) ;
+}
+</pre>
+
+And then:
+
+<pre>
+&gt;&gt;&gt; def hello(s):
+...    print s
+...
+&gt;&gt;&gt; foo(hello)
+hello, world!
+</pre>
+
+    The short answer is: &quot;you can't&quot;.  This is not a
+    Boost.Python limitation so much as a limitation of C++.  The
+    problem is that a Python function is actually data, and the only
+    way of associating data with a C++ function pointer is to store it
+    in a static variable of the function.  The problem with that is
+    that you can only associate one piece of data with every C++
+    function, and we have no way of compiling a new C++ function
+    on-the-fly for every Python function you decide to pass
+    to <code>foo</code>.  In other words, this could work if the C++
+    function is always going to invoke the <em>same</em> Python
+    function, but you probably don't want that.
+
+    <p>If you have the luxury of changing the C++ code you're
+    wrapping, pass it an <code>object</code> instead and call that;
+    the overloaded function call operator will invoke the Python
+    function you pass it behind the <code>object</code>.
+
+    <p>For more perspective on the issue, see <a
+    href="http://aspn.activestate.com/ASPN/Mail/Message/1554837">this
+    posting</a>.
+
+    <hr>
+
+    <h2><a name="dangling">I'm getting the "attempt to return dangling
+    reference" error. What am I doing wrong?</a></h2>
+    That exception is protecting you from causing a nasty crash. It usually
+    happens in response to some code like this:
+<pre>
+period const&amp; get_floating_frequency() const
+{
+  return boost::python::call_method&lt;period const&amp;&gt;(
+      m_self,"get_floating_frequency");
+}
+</pre>
+    And you get:
+<pre>
+ReferenceError: Attempt to return dangling reference to object of type:
+class period
+</pre>
+
+    <p>In this case, the Python method invoked by <code>call_method</code>
+    constructs a new Python object. You're trying to return a reference to a
+    C++ object (an instance of <code>class period</code>) contained within
+    and owned by that Python object. Because the called method handed back a
+    brand new object, the only reference to it is held for the duration of
+    <code>get_floating_frequency()</code> above. When the function returns,
+    the Python object will be destroyed, destroying the instance of
+    <code>class period</code>, and leaving the returned reference dangling.
+    That's already undefined behavior, and if you try to do anything with
+    that reference you're likely to cause a crash. Boost.Python detects this
+    situation at runtime and helpfully throws an exception instead of letting
+    you do that.<br>
+     &nbsp;</p>
+    <hr>
+
+    <h2><a name="question1"></a>Is return_internal_reference efficient?</h2>
+
+    <blockquote>
+      <b>Q:</b> <i>I have an object composed of 12 doubles. A const&amp; to
+      this object is returned by a member function of another class. From the
+      viewpoint of using the returned object in Python I do not care if I get
+      a copy or a reference to the returned object. In Boost.Python Version 2
+      I have the choice of using copy_const_reference or
+      return_internal_reference. Are there considerations that would lead me
+      to prefer one over the other, such as size of generated code or memory
+      overhead?</i>
+
+      <p><b>A:</b> copy_const_reference will make an instance with storage
+      for one of your objects, size = base_size + 12 * sizeof(double).
+      return_internal_reference will make an instance with storage for a
+      pointer to one of your objects, size = base_size + sizeof(void*).
+      However, it will also create a weak reference object which goes in the
+      source object's weakreflist and a special callback object to manage the
+      lifetime of the internally-referenced object. My guess?
+      copy_const_reference is your friend here, resulting in less overall
+      memory use and less fragmentation, also probably fewer total
+      cycles.</p>
+    </blockquote>
+    <hr>
+
+    <h2><a name="question2"></a>How can I wrap functions which take C++
+    containers as arguments?</h2>
+
+    <p>Ralf W. Grosse-Kunstleve provides these notes:</p>
+
+    <ol>
+      <li>
+        Using the regular <code>class_&lt;&gt;</code> wrapper:
+<pre>
+class_&lt;std::vector&lt;double&gt; &gt;("std_vector_double")
+  .def(...)
+  ...
+  ;
+</pre>
+        This can be moved to a template so that several types (double, int,
+        long, etc.) can be wrapped with the same code. This technique is used
+        in the file
+
+        <blockquote>
+          scitbx/include/scitbx/array_family/boost_python/flex_wrapper.h
+        </blockquote>
+        in the "scitbx" package. The file could easily be modified for
+        wrapping std::vector&lt;&gt; instantiations.
+
+        <p>This type of C++/Python binding is most suitable for containers
+        that may contain a large number of elements (&gt;10000).</p>
+      </li>
+
+      <li>
+        Using custom rvalue converters. Boost.Python "rvalue converters"
+        match function signatures such as:
+<pre>
+void foo(std::vector&lt;double&gt; const&amp; array); // pass by const-reference
+void foo(std::vector&lt;double&gt; array); // pass by value
+</pre>
+        Some custom rvalue converters are implemented in the file
+
+        <blockquote>
+          scitbx/include/scitbx/boost_python/container_conversions.h
+        </blockquote>
+        This code can be used to convert from C++ container types such as
+        std::vector&lt;&gt; or std::list&lt;&gt; to Python tuples and vice
+        versa. A few simple examples can be found in the file
+
+        <blockquote>
+          scitbx/array_family/boost_python/regression_test_module.cpp
+        </blockquote>
+        Automatic C++ container &lt;-&gt; Python tuple conversions are most
+        suitable for containers of moderate size. These converters generate
+        significantly less object code compared to alternative 1 above.
+      </li>
+    </ol>
+    A disadvantage of using alternative 2 is that operators such as
+    arithmetic +,-,*,/,% are not available. It would be useful to have custom
+    rvalue converters that convert to a "math_array" type instead of tuples.
+    This is currently not implemented but is possible within the framework of
+    Boost.Python V2 as it will be released in the next couple of weeks. [ed.:
+    this was posted on 2002/03/10]
+
+    <p>It would also be useful to also have "custom lvalue converters" such
+    as std::vector&lt;&gt; &lt;-&gt; Python list. These converters would
+    support the modification of the Python list from C++. For example:</p>
+
+    <p>C++:</p>
+<pre>
+void foo(std::vector&lt;double&gt;&amp; array)
+{
+  for(std::size_t i=0;i&lt;array.size();i++) {
+    array[i] *= 2;
+  }
+}
+</pre>
+    Python:
+<pre>
+&gt;&gt;&gt; l = [1, 2, 3]
+&gt;&gt;&gt; foo(l)
+&gt;&gt;&gt; print l
+[2, 4, 6]
+</pre>
+    Custom lvalue converters require changes to the Boost.Python core library
+    and are currently not available.
+
+    <p>P.S.:</p>
+
+    <p>The "scitbx" files referenced above are available via anonymous
+    CVS:</p>
+<pre>
+cvs -d:pserver:anonymous@cvs.cctbx.sourceforge.net:/cvsroot/cctbx login
+cvs -d:pserver:anonymous@cvs.cctbx.sourceforge.net:/cvsroot/cctbx co scitbx
+</pre>
+    <hr>
+
+    <h2><a name="c1204"></a>fatal error C1204:Compiler limit:internal
+    structure overflow</h2>
+
+    <blockquote>
+      <b>Q:</b> <i>I get this error message when compiling a large source
+      file. What can I do?</i>
+
+      <p><b>A:</b> You have two choices:</p>
+
+      <ol>
+        <li>Upgrade your compiler (preferred)</li>
+
+        <li>
+          Break your source file up into multiple translation units.
+
+          <p><code><b>my_module.cpp</b></code>:</p>
+<pre>
+...
+void more_of_my_module();
+BOOST_PYTHON_MODULE(my_module)
+{
+   def("foo", foo);
+   def("bar", bar);
+   ...
+   more_of_my_module();
+}
+</pre>
+          <code><b>more_of_my_module.cpp</b></code>:
+<pre>
+void more_of_my_module()
+{
+   def("baz", baz);
+   ...
+}
+</pre>
+          If you find that a <code><a href=
+          "class.html#class_-spec">class_</a>&lt;...&gt;</code> declaration
+          can't fit in a single source file without triggering the error, you
+          can always pass a reference to the <code>class_</code> object to a
+          function in another source file, and call some of its member
+          functions (e.g. <code>.def(...)</code>) in the auxilliary source
+          file:
+
+          <p><code><b>more_of_my_class.cpp</b></code>:</p>
+<pre>
+void more_of_my_class(class&lt;my_class&gt;&amp; x)
+{
+   x
+     .def("baz", baz)
+     .add_property("xx", &amp;my_class::get_xx, &amp;my_class::set_xx)
+     ;
+
+   ...
+}
+</pre>
+        </li>
+      </ol>
+    </blockquote>
+    <hr>
+
+    <h2><a name="debugging"></a>How do I debug my Python extensions?</h2>
+
+    <p>Greg Burley gives the following answer for Unix GCC users:</p>
+
+    <blockquote>
+      Once you have created a boost python extension for your c++ library or
+      class, you may need to debug the code. Afterall this is one of the
+      reasons for wrapping the library in python. An expected side-effect or
+      benefit of using BPL is that debugging should be isolated to the c++
+      library that is under test, given that python code is minimal and
+      boost::python either works or it doesn't. (ie. While errors can occur
+      when the wrapping method is invalid, most errors are caught by the
+      compiler ;-).
+
+      <p>The basic steps required to initiate a gdb session to debug a c++
+      library via python are shown here. Note, however that you should start
+      the gdb session in the directory that contains your BPL my_ext.so
+      module.</p>
+<pre>
+(gdb) target exec python
+(gdb) run
+ &gt;&gt;&gt; from my_ext import *
+ &gt;&gt;&gt; [C-c]
+(gdb) break MyClass::MyBuggyFunction
+(gdb) cont
+ &gt;&gt;&gt; pyobj = MyClass()
+ &gt;&gt;&gt; pyobj.MyBuggyFunction()
+Breakpoint 1, MyClass::MyBuggyFunction ...
+Current language:  auto; currently c++
+(gdb) do debugging stuff
+</pre>
+    </blockquote>
+
+    <p>Greg's approach works even better using Emacs' "<code>gdb</code>"
+    command, since it will show you each line of source as you step through
+    it.</p>
+
+    <p>On <b>Windows</b>, my favorite debugging solution is the debugger that
+    comes with Microsoft Visual C++ 7. This debugger seems to work with code
+    generated by all versions of Microsoft and Metrowerks toolsets; it's rock
+    solid and "just works" without requiring any special tricks from the
+    user.</p>
+
+    <p>Raoul Gough has provided the following for gdb on Windows:</p>
+
+    <blockquote>
+
+      <p>gdb support for Windows DLLs has improved lately, so it is
+      now possible to debug Python extensions using a few
+      tricks. Firstly, you will need an up-to-date gdb with support
+      for minimal symbol extraction from a DLL. Any gdb from version 6
+      onwards, or Cygwin gdb-20030214-1 and onwards should do. A
+      suitable release will have a section in the gdb.info file under
+      Configuration &ndash; Native &ndash; Cygwin Native &ndash;
+      Non-debug DLL symbols. Refer to that info section for more
+      details of the procedures outlined here.</p>
+
+      <p>Secondly, it seems necessary to set a breakpoint in the
+      Python interpreter, rather than using ^C to break execution. A
+      good place to set this breakpoint is PyOS_Readline, which will
+      stop execution immediately before reading each interactive
+      Python command. You have to let Python start once under the
+      debugger, so that it loads its own DLL, before you can set the
+      breakpoint:</p>
+
+<p>
+<pre>
+$ gdb python
+GNU gdb 2003-09-02-cvs (cygwin-special)
+[...]
+
+(gdb) run
+Starting program: /cygdrive/c/Python22/python.exe
+Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
+Type "help", "copyright", "credits" or "license" for more information.
+&gt;&gt;&gt; ^Z
+
+
+Program exited normally.
+(gdb) break *&amp;PyOS_Readline
+Breakpoint 1 at 0x1e04eff0
+(gdb) run
+Starting program: /cygdrive/c/Python22/python.exe
+Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
+Type "help", "copyright", "credits" or "license" for more information.
+
+Breakpoint 1, 0x1e04eff0 in python22!PyOS_Readline ()
+   from /cygdrive/c/WINNT/system32/python22.dll
+(gdb) cont
+Continuing.
+&gt;&gt;&gt; from my_ext import *
+
+Breakpoint 1, 0x1e04eff0 in python22!PyOS_Readline ()
+   from /cygdrive/c/WINNT/system32/python22.dll
+(gdb) # my_ext now loaded (with any debugging symbols it contains)
+</pre>
+    </blockquote>
+
+    <h3>Debugging extensions through Boost.Build</h3>
+    If you are launching your extension module tests with <a href=
+    "../../../../tools/build/v1/build_system.htm">Boost.Build</a> using the
+    <code>boost-python-runtest</code> rule, you can ask it to launch your
+    debugger for you by adding "--debugger=<i>debugger</i>" to your bjam
+    command-line:
+<pre>
+bjam -sTOOLS=vc7.1 "--debugger=devenv /debugexe" test
+bjam -sTOOLS=gcc -sPYTHON_LAUNCH=gdb test
+</pre>
+    It can also be extremely useful to add the <code>-d+2</code> option when
+    you run your test, because Boost.Build will then show you the exact
+    commands it uses to invoke it. This will invariably involve setting up
+    PYTHONPATH and other important environment variables such as
+    LD_LIBRARY_PATH which may be needed by your debugger in order to get
+    things to work right.
+    <hr>
+
+    <h2><a name="imul"></a>Why doesn't my <code>*=</code> operator work?</h2>
+
+    <blockquote>
+      <b>Q:</b> <i>I have exported my class to python, with many overloaded
+      operators. it works fine for me except the</i> <code>*=</code>
+      <i>operator. It always tells me "can't multiply sequence with non int
+      type". If I use</i> <code>p1.__imul__(p2)</code> <i>instead of</i>
+      <code>p1 *= p2</code><i>, it successfully executes my code. What's
+      wrong with me?</i>
+
+      <p><b>A:</b> There's nothing wrong with you. This is a bug in Python
+      2.2. You can see the same effect in Pure Python (you can learn a lot
+      about what's happening in Boost.Python by playing with new-style
+      classes in Pure Python).</p>
+<pre>
+&gt;&gt;&gt; class X(object):
+...     def __imul__(self, x):
+...         print 'imul'
+...
+&gt;&gt;&gt; x = X()
+&gt;&gt;&gt; x *= 1
+</pre>
+      To cure this problem, all you need to do is upgrade your Python to
+      version 2.2.1 or later.
+    </blockquote>
+    <hr>
+
+    <h2><a name="macosx"></a>Does Boost.Python work with Mac OS X?</h2>
+
+    It is known to work under 10.2.8 and 10.3 using
+    Apple's gcc 3.3 compiler:
+    <pre>gcc (GCC) 3.3 20030304 (Apple Computer, Inc. build 1493)</pre>
+    Under 10.2.8 get the August 2003 gcc update (free at
+    <a href="http://connect.apple.com/">http://connect.apple.com/</a>).
+    Under 10.3 get the Xcode Tools v1.0 (also free).
+    <p>
+    Python 2.3 is required. The Python that ships with 10.3 is
+    fine. Under 10.2.8 use these commands to install Python
+    as a framework:
+    <pre>./configure --enable-framework
+make
+make frameworkinstall</pre>
+    The last command requires root privileges because the target
+    directory is
+    <tt>/Library/Frameworks/Python.framework/Versions/2.3</tt>.
+    However, the installation does not interfere with the Python
+    version that ships with 10.2.8.
+    <p>
+    It is also crucial to increase the <tt>stacksize</tt> before
+    starting compilations, e.g.:
+    <pre>limit stacksize 8192k</pre>
+    If the <tt>stacksize</tt> is too small the build might crash with
+    internal compiler errors.
+    <p>
+    Sometimes Apple's compiler exhibits a bug by printing an error
+    like the following while compiling a
+    <tt>boost::python::class_&lt;your_type&gt;</tt>
+    template instantiation:
+    <pre>.../inheritance.hpp:44: error: cannot
+ dynamic_cast `p' (of type `struct cctbx::boost_python::&lt;unnamed&gt;::add_pair*
+   ') to type `void*' (source type is not polymorphic)</pre>
+
+    We do not know a general workaround, but if the definition of
+    <tt>your_type</tt> can be modified the following was found
+    to work in all cases encountered so far:<pre>struct your_type
+{
+  // before defining any member data
+#if defined(__MACH__) &amp;&amp; defined(__APPLE_CC__) &amp;&amp; __APPLE_CC__ == 1493
+  bool dummy_;
+#endif
+  // now your member data, e.g.
+  double x;
+  int j;
+  // etc.
+};</pre>
+
+    <hr>
+    <h2><a name="xref">How can I find the existing PyObject that holds a C++
+    object?</a></h2>
+
+    <blockquote>
+      "I am wrapping a function that always returns a pointer to an
+      already-held C++ object."
+    </blockquote>
+    One way to do that is to hijack the mechanisms used for wrapping a class
+    with virtual functions. If you make a wrapper class with an initial
+    PyObject* constructor argument and store that PyObject* as "self", you
+    can get back to it by casting down to that wrapper type in a thin wrapper
+    function. For example:
+<pre>
+class X { X(int); virtual ~X(); ... };
+X* f();  // known to return Xs that are managed by Python objects
+
+
+// wrapping code
+
+struct X_wrap : X
+{
+    X_wrap(PyObject* self, int v) : self(self), X(v) {}
+    PyObject* self;
+};
+
+handle&lt;&gt; f_wrap()
+{
+    X_wrap* xw = dynamic_cast&lt;X_wrap*&gt;(f());
+    assert(xw != 0);
+    return handle&lt;&gt;(borrowed(xw-&gt;self));
+}
+
+...
+
+def("f", f_wrap());
+class_&lt;X,X_wrap,boost::noncopyable&gt;("X", init&lt;int&gt;())
+   ...
+   ;
+</pre>
+    Of course, if X has no virtual functions you'll have to use
+    <code>static_cast</code> instead of <code>dynamic_cast</code> with no
+    runtime check that it's valid. This approach also only works if the
+    <code>X</code> object was constructed from Python, because
+    <code>X</code>s constructed from C++ are of course never
+    <code>X_wrap</code> objects.
+
+    <p>Another approach to this requires you to change your C++ code a bit;
+    if that's an option for you it might be a better way to go. work we've
+    been meaning to get to anyway. When a <code>shared_ptr&lt;X&gt;</code> is
+    converted from Python, the shared_ptr actually manages a reference to the
+    containing Python object. When a shared_ptr&lt;X&gt; is converted back to
+    Python, the library checks to see if it's one of those "Python object
+    managers" and if so just returns the original Python object. So you could
+    just write <code>object(p)</code> to get the Python object back. To
+    exploit this you'd have to be able to change the C++ code you're wrapping
+    so that it deals with shared_ptr instead of raw pointers.</p>
+
+    <p>There are other approaches too. The functions that receive the Python
+    object that you eventually want to return could be wrapped with a thin
+    wrapper that records the correspondence between the object address and
+    its containing Python object, and you could have your f_wrap function
+    look in that mapping to get the Python object out.</p>
+
+    <hr>
+
+    <h2><a name="ownership">How can I wrap a function which needs to take
+    ownership of a raw pointer?</a></h2>
+
+    <blockquote>
+      <i>Part of an API that I'm wrapping goes something like this:</i>
+<pre>
+struct A {}; struct B { void add( A* ); }
+where B::add() takes ownership of the pointer passed to it.
+</pre>
+
+      <p><i>However:</i></p>
+<pre>
+a = mod.A()
+b = mod.B()
+b.add( a )
+del a
+del b
+# python interpreter crashes
+# later due to memory corruption.
+</pre>
+
+      <p><i>Even binding the lifetime of a</i> to b via
+      with_custodian_and_ward doesn't prevent the python object a from
+      ultimately trying to delete the object it's pointing to. Is there a way
+      to accomplish a 'transfer-of-ownership' of a wrapped C++ object?</p>
+
+      <p><i>--Bruce Lowery</i></p>
+    </blockquote>
+    Yes: Make sure the C++ object is held by auto_ptr:
+<pre>
+class_&lt;A, std::auto_ptr&lt;A&gt; &gt;("A")
+    ...
+    ;
+</pre>
+    Then make a thin wrapper function which takes an auto_ptr parameter:
+<pre>
+void b_insert(B&amp; b, std::auto_ptr&lt;A&gt; a)
+{
+    b.insert(a.get());
+    a.release();
+}
+</pre>
+    Wrap that as B.add. Note that pointers returned via <code><a href=
+    "manage_new_object.html#manage_new_object-spec">manage_new_object</a></code>
+    will also be held by <code>auto_ptr</code>, so this transfer-of-ownership
+    will also work correctly.
+
+    <hr>
+    <h2><a name="slow_compilation">Compilation takes too much time and eats too
+            much memory!  What can I do to make it faster?</a></h2>
+    <p>
+    Please refer to the <a href="../tutorial/doc/html/python/techniques.html#python.reducing_compiling_time"
+    >Reducing Compiling Time</a> section in the tutorial.
+    </p>
+
+    <hr>
+    <h2><a name="packages">How do I create sub-packages using Boost.Python?</a></h2>
+    <p>
+    Please refer to the <a href="../tutorial/doc/html/python/techniques.html#python.creating_packages"
+    >Creating Packages</a> section in the tutorial.
+    </p>
+
+    <hr>
+    <h2><a name="msvcthrowbug"></a>error C2064: term does
+        not evaluate to a function taking 2 arguments</h2>
+    <font size="-1"><i>Niall Douglas provides these notes:</i></font><p>
+    If you see Microsoft Visual C++ 7.1 (MS Visual Studio .NET 2003) issue
+    an error message like the following it is most likely due to a bug
+    in the compiler:
+    <pre>boost\boost\python\detail\invoke.hpp(76):
+error C2064: term does not evaluate to a function taking 2 arguments"</pre>
+    This message is triggered by code like the following:
+<pre>#include &lt;boost/python.hpp&gt;
+
+using namespace boost::python;
+
+class FXThread
+{
+public:
+    bool setAutoDelete(bool doso) throw();
+};
+
+void Export_FXThread()
+{
+    class_< FXThread >("FXThread")
+        .def("setAutoDelete", &amp;FXThread::setAutoDelete)
+    ;
+}
+    </pre>
+    The bug is related to the <code>throw()</code> modifier.
+    As a workaround cast off the modifier. E.g.:
+<pre>
+        .def("setAutoDelete", (bool (FXThread::*)(bool)) &amp;FXThread::setAutoDelete)</pre>
+    <p>(The bug has been reported to Microsoft.)</p>
+
+    <hr>
+    <h2><a name="custom_string"></a>How can I automatically
+    convert my custom string type to and from a Python string?</h2>
+    <font size="-1"><i>Ralf W. Grosse-Kunstleve provides these
+    notes:</i></font><p>
+    Below is a small, self-contained demo extension module that shows
+    how to do this. Here is the corresponding trivial test:
+    <pre>import custom_string
+assert custom_string.hello() == "Hello world."
+assert custom_string.size("california") == 10</pre>
+
+    If you look at the code you will find:
+
+    <ul>
+    <li>A custom <tt>to_python</tt> converter (easy):
+        <tt>custom_string_to_python_str</tt>
+
+    <li>A custom lvalue converter (needs more code):
+        <tt>custom_string_from_python_str</tt>
+    </ul>
+
+    The custom converters are registered in the global Boost.Python
+    registry near the top of the module initialization function. Once
+    flow control has passed through the registration code the automatic
+    conversions from and to Python strings will work in any module
+    imported in the same process.
+
+<pre>#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/to_python_converter.hpp&gt;
+
+namespace sandbox { namespace {
+
+  class custom_string
+  {
+    public:
+      custom_string() {}
+      custom_string(std::string const&amp; value) : value_(value) {}
+      std::string const&amp; value() const { return value_; }
+    private:
+      std::string value_;
+  };
+
+  struct custom_string_to_python_str
+  {
+    static PyObject* convert(custom_string const&amp; s)
+    {
+      return boost::python::incref(boost::python::object(s.value()).ptr());
+    }
+  };
+
+  struct custom_string_from_python_str
+  {
+    custom_string_from_python_str()
+    {
+      boost::python::converter::registry::push_back(
+        &amp;convertible,
+        &amp;construct,
+        boost::python::type_id&lt;custom_string&gt;());
+    }
+
+    static void* convertible(PyObject* obj_ptr)
+    {
+      if (!PyString_Check(obj_ptr)) return 0;
+      return obj_ptr;
+    }
+
+    static void construct(
+      PyObject* obj_ptr,
+      boost::python::converter::rvalue_from_python_stage1_data* data)
+    {
+      const char* value = PyString_AsString(obj_ptr);
+      if (value == 0) boost::python::throw_error_already_set();
+      void* storage = (
+        (boost::python::converter::rvalue_from_python_storage&lt;custom_string&gt;*)
+          data)-&gt;storage.bytes;
+      new (storage) custom_string(value);
+      data-&gt;convertible = storage;
+    }
+  };
+
+  custom_string hello() { return custom_string(&quot;Hello world.&quot;); }
+
+  std::size_t size(custom_string const&amp; s) { return s.value().size(); }
+
+  void init_module()
+  {
+    using namespace boost::python;
+
+    boost::python::to_python_converter&lt;
+      custom_string,
+      custom_string_to_python_str&gt;();
+
+    custom_string_from_python_str();
+
+    def(&quot;hello&quot;, hello);
+    def(&quot;size&quot;, size);
+  }
+
+}} // namespace sandbox::&lt;anonymous&gt;
+
+BOOST_PYTHON_MODULE(custom_string)
+{
+  sandbox::init_module();
+}</pre>
+
+    <hr>
+    <h2><a name="topythonconversionfailed"></a
+    >Why is my automatic to-python conversion not being found?</h2>
+    <font size="-1"><i>Niall Douglas provides these notes:</i></font><p>
+    If you define custom converters similar to the ones
+    shown above the <tt>def_readonly()</tt> and <tt>def_readwrite()</tt>
+    member functions provided by <tt>boost::python::class_</tt> for
+    direct access to your member data will not work as expected.
+    This is because <tt>def_readonly("bar",&nbsp;&amp;foo::bar)</tt> is
+    equivalent to:
+
+<pre>.add_property("bar", make_getter(&amp;foo::bar, return_internal_reference()))</pre>
+
+    Similarly, <tt>def_readwrite("bar",&nbsp;&amp;foo::bar)</tt> is
+    equivalent to:
+
+<pre>.add_property("bar", make_getter(&amp;foo::bar, return_internal_reference()),
+                     make_setter(&amp;foo::bar, return_internal_reference())</pre>
+
+    In order to define return value policies compatible with the
+    custom conversions replace <tt>def_readonly()</tt> and
+    <tt>def_readwrite()</tt> by <tt>add_property()</tt>. E.g.:
+
+<pre>.add_property("bar", make_getter(&amp;foo::bar, return_value_policy&lt;return_by_value&gt;()),
+                     make_setter(&amp;foo::bar, return_value_policy&lt;return_by_value&gt;()))</pre>
+
+    <hr>
+    <h2><a name="threadsupport"></a
+    >Is Boost.Python thread-aware/compatible with multiple interpreters?</h2>
+    <font size="-1"><i>Niall Douglas provides these notes:</i></font><p>
+    The quick answer to this is: no.</p>
+    <p>
+    The longer answer is that it can be patched to be so, but it's
+    complex. You will need to add custom lock/unlock wrapping of every
+    time your code enters Boost.Python (particularly every virtual
+    function override) plus heavily modify
+    <tt>boost/python/detail/invoke.hpp</tt> with custom unlock/lock
+    wrapping of every time Boost.Python enters your code. You must
+    furthermore take care to <i>not</i> unlock/lock when Boost.Python
+    is invoking iterator changes via <tt>invoke.hpp</tt>.</p>
+    <p>
+    There is a patched <tt>invoke.hpp</tt> posted on the C++-SIG
+    mailing list archives and you can find a real implementation of all
+    the machinery necessary to fully implement this in the TnFOX
+    project at <a href="http://sourceforge.net/projects/tnfox/"> this
+    SourceForge project location</a>.</p>
+
+    <hr>
+
+    <p>Revised
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     12 March, 2006
+    <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p><i>&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002-2006.</i></p>
+  </body>
+</html>

doc/v2/feb2002.html

@@ -0,0 +1,367 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+    <meta http-equiv="Content-Type" content=
+    "text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - February 2002 Progress Report</title>
+<style type="text/css">
+ :link { color: #0000ff }
+ :visited { color: #800080 }
+ p.c3 {font-style: italic}
+ h2.c2 {text-align: center}
+ h1.c1 {text-align: center}
+</style>
+
+    <table border="0" cellpadding="7" cellspacing="0" width=
+    "100%" summary="header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277" alt=
+          "C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+
+        <td valign="top">
+          <h1 class="c1"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 class="c2">February 2002 Progress Report</h2>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="index">
+      <dt><a href="#Python10">Python10 Conference Report</a>
+
+      <dt><a href="#progress">Boost.Python v2 Progress</a>
+
+      <dd>
+        <dl class="index">
+          <dt><a href="#documentation">Documentation</a>
+
+          <dt><a href="#conversion">Overhaul of
+          <code>to_python</code>/<code>from_python</code>
+          conversion mechanism</a>
+
+          <dt><a href="#miscellaneous">Miscellaneous</a>
+        </dl>
+    </dl>
+
+    <h2><a name="Python10">Python10 Conference Report</a></h2>
+    I spent the first week of February at the Python10 conference
+    in Alexandria, VA. I&#39;m including this experience report
+    for two reasons: firstly, it documents where my time was
+    used. Secondly, a public presence for Boost.Python and
+    interaction between the Python and C++ communities is
+    important to the future of Boost.Python, which in turn is
+    important to the Kull Project. 
+
+    <p>Andy Koenig, of all people, was the keynote speaker of
+    this year&#39;s opening plenary session. He presented his
+    &quot;impressions of a polyglot outsider&quot;, which
+    studiously avoided any mention of C++ until the end of his
+    talk, when he was asked about standardization. I was
+    surprised to learn that the C++ community at large wanted a
+    few more years before beginning but when ANSI accepted
+    HP&#39;s request for a standard, the process was forced to
+    start: it was a matter of participating or having
+    standardization proceed without one&#39;s input. Andy managed
+    to highlight very effectively the balance of strengths in
+    Python, one of the most important being its support for
+    extension via libraries. In many ways that makes Python a
+    good analogue for C++ in the interpreted world
+
+    <p>There were several kind mentions of the Boost.Python
+    library from people who found it indispensable. I was
+    particularly happy that Karl MacMillan, Michael Droettboom,
+    and Ichiro Fujinaga from Johns Hopkins is using it to do OCR
+    on a vast library of music notation, since in a previous life
+    I was an author of music notation software. These guys are
+    also drawing on Ullrich Koethe&#39;s VIGRA library for image
+    manipulation (Ullrich has been a major contributor to
+    Boost.Python). They also have a system for writing the
+    Boost.Python wrapper code in C++ comments, which allows them
+    to keep all of the code in one place. I&#39;ve asked them to
+    send me some information on that.
+
+    <p>The development of Swig has been gaining momentum again
+    (the basic description at
+    www.boost.org/libs/python/doc/comparisons.html still
+    applies). The talk given about it by David Beazly was very
+    well-attended, and they appear to have quite a few users.
+    Swig&#39;s strengths (coverage of many langauages) and
+    weaknesses (incomplete C++ language support) haven&#39;t
+    changed, although the C++ support seems to have improved
+    considerably - they now claim to have a complete model of the
+    C++ type system. It seems to be mostly geared at wrapping
+    what Walter Landry calls &quot;C-Tran&quot;: C++ code which
+    traffics in built-in types with little use of abstraction.
+    I&#39;m not knocking that, either: I&#39;m sure a lot of that
+    code exists, so it&#39;s a valuable service. One feature Swig
+    has which I&#39;d like to steal is the ability to unwrap a
+    single Python argument into multiple C++ arguments, for
+    example, by converting a Python string into a pointer and
+    length. When his talk was over, David approached me about a
+    possible joint workshop on language binding, which sounds
+    like a fun idea to me.
+
+    <p>I spent some considerable time talking with Steven Knight,
+    the leader of the Scons build tool effort. We had a lot to
+    share with one another, and I gained a much better
+    appreciation for many of the Scons design decisions. Scons
+    seems to be concentrating on being the ultimate build system
+    substrate, and Steve seemed to think that we were on the
+    right track with our high-level design. We both hope that the
+    Boost.Build V2 high-level architecture can eventually be
+    ported to run on top of Scons.
+
+    <p>They also have a highly-refined and successful development
+    procedure which I&#39;d like to emulate for Boost.Build V2.
+    Among many other things they do, their source-control system
+    automatically ensures that when you check in a new test, it
+    is automatically run on the currently checked-in state of the
+    code, and is expected to fail -- a relatively obvious good
+    idea which I&#39;ve never heard before.
+
+    <p>Guido Van Rossum&#39;s &quot;State of the Python
+    Union&quot; address was full of questions for the community
+    about what should be done next, but the one idea Guido seemed
+    to stress was that core language stability and continuing
+    library development would be a good idea (sound familiar?) I
+    mentioned the Boost model as a counterpoint to the idea of
+    something like CPAN (the massive Perl library archives), and
+    it seemed to generate some significant interest. I&#39;ve
+    offered to work with anyone from the Python community who
+    wants to set up something like Boost.
+
+    <p>There was some discussion of &quot;string
+    interpolation&quot; (variable substitution in strings), and
+    Guido mentioned that he had some thoughts about the
+    strengths/weaknesses of Python&#39;s formatting interface. It
+    might be useful for those working on formatting for boost to
+    contact him and find out what he has to say.
+
+    <p>Ka-Ping Yee demoed a Mailman discussion thread weaver.
+    This tool weaves the various messages in a discussion thread
+    into a single document so you can follow the entire
+    conversation. Since we&#39;re looking very seriously at
+    moving Boost to Mailman, this could be a really useful thing
+    for us to have. If we do this, we&#39;ll move the yahoogroups
+    discussions into the mailman archive so old discussions can
+    be easily accessed in the same fashion.
+
+    <p>And, just because it&#39;s cool, though perhaps not
+    relevant: http://homepages.ulb.ac.be/~arigo/psyco/ is a
+    promising effort to accelerate the execution of Python code
+    to speeds approaching those of compiled languages. It
+    reminded me a lot of Todd Veldhuizen&#39;s research into
+    moving parts of C++ template compilation to runtime, only
+    coming from the opposite end of things.
+
+    <h2><a name="progress">Boost.Python v2 Progress</a></h2>
+    Here&#39;s what actually got accomplished. 
+
+    <h3><a name="documentation">Documentation</a></h3>
+
+    <p>My first priority upon returning from Python10 was to get
+    some documentation in place. After wasting an unfortunate
+    amount of time looking at automatic documentation tools which
+    don&#39;t quite work, I settled down to use Bill Kempf&#39;s
+    HTML templates designed to be a boost standard. While they
+    are working well, it is highly labor-intensive.
+
+    <p>I decided to begin with the high-level reference material,
+    as opposed to tutorial, narrative, or nitty-gritty details of
+    the framework. It seemed more important to have a precise
+    description of the way the commonly-used components work than
+    to have examples in HTML (since we already have some test
+    modules), and since the low-level details are much
+    less-frequently needed by users it made sense for me to
+    simply respond to support requests for the time being.
+
+    <p>After completing approximately 60% of the high-level docs
+    (currently checked in to libs/python/doc/v2), I found myself
+    ready to start documenting the mechanisms for creating
+    to-/from-python converters. This caused a dilemma: I had
+    realized during the previous week that a much simpler,
+    more-efficient, and easier-to-use implementation was
+    possible, but I hadn&#39;t planned on implementing it right
+    away, since what was already in place worked adequately. I
+    had also received my first query on the C++-sig about how to
+    write such a converter
+
+    <p>Given the labor-intensive nature of documentation writing,
+    I decided it would be a bad idea to document the conversion
+    mechanism if I was just going to rewrite it. Often the best
+    impetus for simplifying a design is the realization that
+    understandably documenting its current state would be too
+    difficult, and this was no exception.
+
+    <h3><a name="conversion">Overhaul of
+    <code>to_python</code>/<code>from_python</code> conversion
+    mechanism</a></h3>
+
+    <p>There were two basic realizations involved here:
+
+    <ol>
+      <li><code>to_python</code> conversion could be a one-step
+      process, once an appropriate conversion function is found.
+      This allows elimination of the separate indirect
+      convertibility check
+
+      <li>There are basically two categories of from_python
+      conversions: those which lvalues stored within or held by
+      the Python object (essentially extractions), like what
+      happens when an instance of a C++ class exposed with class_
+      is used as the target of a wrapped member function), and
+      those in which a new rvalue gets created, as when a Python
+      Float is converted to a C++
+      <code>complex&lt;double&gt;</code> or a Python tuple is
+      converted to a C++ <code>std::vector&lt;&gt;</code>. From
+      the client side, there are two corresponding categories of
+      conversion: those which demand an lvalue conversion and
+      those which can accept an lvalue or an rvalue conversion.
+    </ol>
+    The latter realization allowed the following collapse, which
+    considerably simplified things: 
+
+    <blockquote>
+      <table border="1" summary="Conversion protocol">
+        <tr>
+          <th>Target Type
+
+          <th>Eligible Converters
+
+        <tr>
+          <td><code>T</code> 
+
+          <td rowspan="5"><code>T</code> rvalue or lvalue
+
+        <tr>
+          <td><code>T const</code> 
+
+        <tr>
+          <td><code>T volatile</code> 
+
+        <tr>
+          <td><code>T const volatile</code> 
+
+        <tr>
+          <td><code>T const&amp;</code> 
+
+        <tr>
+          <td><code>T const*</code> 
+
+          <td rowspan="9"><code>T</code> lvalue
+
+        <tr>
+          <td><code>T volatile*</code> 
+
+        <tr>
+          <td><code>T const volatile*</code> 
+
+        <tr>
+          <td><code>T&amp;</code> 
+
+        <tr>
+          <td><code>T volatile&amp;</code> 
+
+        <tr>
+          <td><code>T const volatile&amp;</code> 
+
+        <tr>
+          <td><code>T* const&amp;</code> 
+
+        <tr>
+          <td><code>T const* const&amp;</code> 
+
+        <tr>
+          <td><code>T volatile*const&amp;</code> 
+
+        <tr>
+          <td><code>T const volatile*const&amp;</code> 
+      </table>
+    </blockquote>
+    This job included the following additional enhancements: 
+
+    <ul>
+      <li>Elimination of virtual functions, which cause object
+      code bloat
+
+      <li>Registration of a single converter function for all
+      lvalue conversions, two for all rvalue conversions
+
+      <li>Killed lots of unneeded code
+
+      <li>Increased opacity of registry interface
+
+      <li>Eliminated all need for decorated runtime type
+      identifiers
+
+      <li>Updated test modules to reflect new interface
+
+      <li>Eliminated the need for users to worry about converter
+      lifetime issues Additional Builtin Conversion Enhancements
+
+      <li>Support for complex&lt;float&gt;,
+      complex&lt;double&gt;, and complex&lt;long double&gt;
+      conversions
+
+      <li>Support for bool conversions
+
+      <li>NULL pointers representable by None in Python
+
+      <li>Support for conversion of Python classic classes to
+      numeric types
+    </ul>
+
+    <h3><a name="miscellaneous">Miscellaneous</a></h3>
+    These don&#39;t fit easily under a large heading: 
+
+    <ul>
+      <li>Support CallPolicies for class member functions
+
+      <li>from_python_data.hpp: revamped type alignment
+      metaprogram so that it&#39;s fast enough for KCC
+
+      <li>classfwd.hpp header forward-declares class_&lt;T&gt;
+
+      <li>indirect_traits.hpp:
+
+      <li>added is_pointer_to_reference
+
+      <li>fixed bugs
+
+      <li>Reduced recompilation dependencies
+
+      <li>msvc_typeinfo works around broken MS/Intel typeid()
+      implementation
+
+      <li>Many fixes and improvements to the type_traits library
+      in order to work around compiler bugs and suppress warnings
+
+      <li>Eliminated the need for explicit acquisition of
+      converter registrations
+
+      <li>Expanded constructor support to 6 arguments
+
+      <li>Implemented generalized pointer lifetime support
+
+      <li>Updated code generation for returning.hpp
+
+      <li>Tracked down and fixed cycle GC bugs
+
+      <li>Added comprehensive unit tests for destroy_reference,
+      pointer_type_id, select_from_python, complex&lt;T&gt;,
+      bool, and classic class instance conversions
+    </ul>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  13 November, 2002
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+
+
+  <p class="c3">&copy; Copyright <a href=
+  "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002. Distributed
+  under the Boost Software License, Version 1.0. (See accompanying file
+  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</p>
+

doc/v2/function_doc_signature.html

@@ -0,0 +1,216 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright Nikolay Mladenov	 2007. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+<head>
+  <meta http-equiv="Content-Type" content=
+  "text/html; charset=us-ascii">
+  <link rel="stylesheet" type="text/css" href="../boost.css">
+
+  <title>Boost.Python -
+  &lt;boost/python/doobject/function_doc_signature.hpp&gt;</title>
+</head>
+
+<body>
+  <table border="0" cellpadding="7" cellspacing="0" width="100%"
+  summary="header">
+    <tr>
+      <td valign="top" width="300">
+        <h3><a href="../../../../index.htm"><img height="86" width=
+        "277" alt="C++ Boost" src="../../../../boost.png" border=
+        "0"></a></h3>
+      </td>
+
+      <td valign="top">
+        <h1 align="center"><a href=
+        "../index.html">Boost.Python</a></h1>
+
+        <h2 align="center">Header
+        &lt;boost/python/object/function_doc_signature.hpp&gt;</h2>
+      </td>
+    </tr>
+  </table>
+  <hr>
+
+  <h2>Contents</h2>
+
+  <dl class="page-index">
+    <dt><a href="#introduction">Introduction</a></dt>
+
+    <dt><a href="#classes">Classes</a></dt>
+
+    <dd>
+      <dl class="page-index">
+        <dt><a href="#function_doc_signature_generator-spec">Class
+        <code>function_doc_signature_generator</code></a></dt>
+
+        <dd>
+          <dl class="page-index">
+            <dt><a href="#function_doc_signature_generator-spec-synopsis">Class
+            <code>function_doc_signature_generator</code> synopsis</a></dt>
+
+          </dl>
+        </dd>
+      </dl>
+    </dd>
+
+    <dt><a href="#examples">Examples</a></dt>
+  </dl>
+  <hr>
+
+  <h2><a name="introduction" id=
+  "introduction"></a>Introduction</h2>
+
+  <p>Boost.Python supports docstrings with automatic
+  appending of Pythonic and C++ signatures. This feature is implemented 
+  by <code>class function_doc_signature_generator</code>
+  The class uses all of the overloads, supplied arg names and default values, as well as 
+  the user-defined docstrings, to generate documentation for a given function.</p>
+
+  <h2><a name="classes" id="classes"></a>Classes</h2>
+
+  <h3><a name="function_doc_signature_generator-spec" id=
+  "function_doc_signature_generator-spec"></a>Class
+  <code>function_doc_signature_generator</code></h3>
+
+  <p>
+   The class has only one public function which returns a list of strings documenting the
+   overloads of a function.
+  </p>
+
+  <h4><a name="function_doc_signature_generator-spec-synopsis" id=
+  "function_doc_signature_generator-spec-synopsis"></a>Class
+  <code>function_doc_signature_generator</code> synopsis</h4>
+  <pre>
+namespace boost { namespace python { namespace objects {
+
+    class function_doc_signature_generator 
+    {
+      public:
+          static list function_doc_signatures(function const *f);
+    };
+
+}}}
+</pre>
+
+
+  <h2><a name="examples" id="examples"></a>Examples</h2>
+
+  <h4>Docstrings generated with <code>function_doc_signature_generator</code></h4>
+  <pre>
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/def.hpp&gt;
+#include &lt;boost/python/args.hpp&gt;
+#include &lt;boost/python/tuple.hpp&gt;
+#include &lt;boost/python/class.hpp&gt;
+#include &lt;boost/python/overloads.hpp&gt;
+#include &lt;boost/python/raw_function.hpp&gt;
+
+using namespace boost::python;
+
+tuple f(int x = 1, double y = 4.25, char const* z = "wow")
+{
+    return make_tuple(x, y, z);
+}
+
+BOOST_PYTHON_FUNCTION_OVERLOADS(f_overloads, f, 0, 3)
+
+
+struct X
+{
+    tuple f(int x = 1, double y = 4.25, char const* z = "wow")
+    {
+        return make_tuple(x, y, z);
+    }
+};
+
+BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS(X_f_overloads, X::f, 0, 3)
+
+tuple raw_func(tuple args, dict kw)
+{
+    return make_tuple(args, kw);
+}
+
+BOOST_PYTHON_MODULE(args_ext)
+{
+    def("f", f, (arg("x")=1, arg("y")=4.25, arg("z")="wow")
+        , "This is f's docstring"
+        );
+
+    def("raw", raw_function(raw_func));
+
+    def("f1", f, f_overloads("f1's docstring", args("x", "y", "z")));
+
+
+    class_&lt;X&gt;("X", "This is X's docstring", init&lt;&gt;(args("self")))
+        .def("f", &amp;X::f
+             , "This is X.f's docstring"
+             , args("self","x", "y", "z"))
+
+        ;
+
+}
+
+</pre>
+Python code:
+  <pre>
+&gt;&gt;&gt; import args_ext
+&gt;&gt;&gt; help(args_ext)
+Help on module args_ext:
+
+NAME
+    args_ext
+
+FILE
+    args_ext.pyd
+
+CLASSES
+    Boost.Python.instance(__builtin__.object)
+        X
+
+    class X(Boost.Python.instance)
+     |  This is X's docstring
+     |
+     |  Method resolution order:
+     |      X
+     |      Boost.Python.instance
+     |      __builtin__.object
+     |
+     |  Methods defined here:
+     |
+     |  __init__(...)
+     |      __init__( (object)self) -> None :
+     |       C++ signature:
+     |           void __init__(struct _object *)
+     |
+     |  f(...)
+     |      f( (X)self, (int)x, (float)y, (str)z) -> tuple : This is X.f's docstring
+     |      C++ signature:
+     |          class boost::python::tuple f(struct X {lvalue},int,double,char const *)
+     |
+     |    .................
+     |
+FUNCTIONS
+    f(...)
+        f([ (int)x=1 [, (float)y=4.25 [, (str)z='wow']]]) -> tuple : This is f's docstring
+        C++ signature:
+            class boost::python::tuple f([ int=1 [,double=4.25 [,char const *='wow']]])
+
+    f1(...)
+        f1([ (int)x [, (float)y [, (str)z]]]) -> tuple : f1's docstring
+        C++ signature:
+            class boost::python::tuple f1([ int [,double [,char const *]]])
+
+    raw(...)
+        object raw(tuple args, dict kwds) :
+        C++ signature:
+            object raw(tuple args, dict kwds)
+
+
+</pre>
+
+  <p><i>&copy; Copyright <a href="mailto:nickm at sitius dot com">Nikolay Mladenov</a> 2007.</i></p>
+</body>
+</html>

doc/v2/handle.html

@@ -0,0 +1,336 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/handle.hpp&gt;</title>
+
+    <style type="text/css">
+ p.c4 {font-style: italic}
+ span.c3 {color: #ff0000}
+ h2.c2 {text-align: center}
+ h1.c1 {text-align: center}
+        </style>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 class="c1"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 class="c2">Header &lt;boost/python/handle.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#handle-spec">Class template
+          <code>handle</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#handle-spec-synopsis">Class <code>handle</code>
+              synopsis</a></dt>
+
+              <dt><a href="#handle-spec-ctors">Class <code>handle</code>
+              constructors and destructor</a></dt>
+
+              <dt><a href="#handle-spec-modifiers">Class <code>handle</code>
+              modifier functions</a></dt>
+
+              <dt><a href="#handle-spec-observers">Class <code>handle</code>
+              observer functions</a></dt>
+            </dl>
+          </dd>
+        </dl>
+      </dd>
+
+      <dt><a href="#functions">Functions</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#borrowed-spec"><code>borrowed</code></a></dt>
+
+          <dt><a href="#allow_null-spec"><code>allow_null</code></a></dt>
+        </dl>
+      </dd>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><code>&lt;boost/python/handle.hpp&gt;</code> provides
+    <code>class&nbsp;template&nbsp;handle</code>, a smart pointer for
+    managing reference-counted Python objects.</p>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="handle-spec"></a>Class template <code>handle</code></h3>
+
+    <p><code>handle</code> is a smart pointer to a Python object type; it
+    holds a pointer of type <code>T*</code>, where T is its template
+    parameter. <code>T</code> must be either a type derived from
+    <code>PyObject</code> or a <a href="definitions.html#POD">POD</a> type
+    whose initial <code>sizeof(PyObject)</code> bytes are layout-compatible
+    with <code>PyObject</code>. Use <code>handle&lt;&gt;</code> at the
+    boundary between the Python/'C' API and high-level code; prefer <code><a
+    href="object.html#object-spec">object</a></code> for a generalized
+    interface to Python objects.</p>
+
+    <p><a name="upcast"></a>In this document, the term "upcast" refers to an
+    operation which converts a pointer <code>Y*</code> to a base class
+    pointer <code>T*</code> via <code>static_cast&lt;T*&gt;</code> if
+    <code>Y</code> is derived from <code>T</code>, or via C-style cast
+    <code>(T*)</code> if it is not. However, in the latter case the "upcast"
+    is ill-formed if the initial <code>sizeof(PyObject)</code> bytes of
+    <code>Y</code> are not layout-compatible with <code>PyObject</code>.</p>
+
+    <h4><a name="handle-spec-synopsis"></a>Class template handle
+    synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+  template &lt;class T&gt;
+  class handle
+  {
+      typedef <i>unspecified-member-function-pointer</i> bool_type;
+
+   public: // types
+      typedef T element_type;
+
+   public: // member functions
+      ~handle();
+
+      template &lt;class Y&gt;
+      explicit handle(detail::borrowed&lt;null_ok&lt;Y&gt; &gt;* p);
+
+      template &lt;class Y&gt;
+      explicit handle(null_ok&lt;detail::borrowed&lt;Y&gt; &gt;* p);
+
+      template &lt;class Y&gt;
+      explicit handle(detail::borrowed&lt;Y&gt;* p);
+
+      template &lt;class Y&gt;
+      explicit handle(null_ok&lt;Y&gt;* p);
+
+      template &lt;class Y&gt;
+      explicit handle(Y* p);
+
+      handle();
+
+      handle&amp; operator=(handle const&amp; r);
+
+      template&lt;typename Y&gt;
+      handle&amp; operator=(handle&lt;Y&gt; const &amp; r); // never throws
+
+
+      template &lt;typename Y&gt;
+      handle(handle&lt;Y&gt; const&amp; r);
+
+      handle(handle const&amp; r);
+
+      T* operator-&gt; () const;
+      T&amp; operator* () const;
+      T* get() const;
+      void reset();
+      T* release();
+
+      operator bool_type() const; // never throws
+   private:
+      T* m_p;
+  };
+  
+  template &lt;class T&gt; struct null_ok;
+  namespace detail { template &lt;class T&gt; struct borrowed; }
+}}
+</pre>
+
+    <h4><a name="handle-spec-ctors">Class <code>handle</code> constructors
+    and destructor</a></h4>
+<pre>
+virtual ~handle();
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>Py_XDECREF(</code><i>upcast</i><code>&lt;PyObject*&gt;(m_p))</code></dt>
+    </dl>
+<pre>
+template &lt;class Y&gt;
+explicit handle(detail::borrowed&lt;null_ok&lt;Y&gt; &gt;* p);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>Py_XINCREF(</code><i>upcast</i><code>&lt;PyObject*&gt;(p));
+      m_p&nbsp;=&nbsp;</code><i>upcast</i><code>&lt;T*&gt;(p);</code></dt>
+    </dl>
+<pre>
+template &lt;class Y&gt;
+explicit handle(null_ok&lt;detail::borrowed&lt;Y&gt; &gt;* p);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>Py_XINCREF(</code><i>upcast</i><code>&lt;PyObject*&gt;(p));
+      m_p&nbsp;=&nbsp;</code><i>upcast</i><code>&lt;T*&gt;(p);</code></dt>
+    </dl>
+<pre>
+template &lt;class Y&gt;
+explicit handle(detail::borrowed&lt;Y&gt;* p);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>Py_XINCREF(</code><i>upcast</i><code>&lt;PyObject*&gt;(p));
+      m_p&nbsp;=&nbsp;</code><i>upcast</i><code>&lt;T*&gt;(<a href=
+      "errors.html#expect_non_null-spec">expect_non_null</a>(p));</code></dt>
+    </dl>
+<pre>
+template &lt;class Y&gt;
+explicit handle(null_ok&lt;Y&gt;* p);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>m_p&nbsp;=&nbsp;</code><i>upcast</i><code>&lt;T*&gt;(p);</code></dt>
+    </dl>
+<pre>
+template &lt;class Y&gt;
+explicit handle(Y* p);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>m_p&nbsp;=&nbsp;</code><i>upcast</i><code>&lt;T*&gt;(<a href=
+      "errors.html#expect_non_null-spec">expect_non_null</a>(p));</code></dt>
+    </dl>
+<pre>
+handle();
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b> <code>m_p&nbsp;=&nbsp;0;</code></dt>
+    </dl>
+<pre>
+template &lt;typename Y&gt;
+handle(handle&lt;Y&gt; const&amp; r);
+handle(handle const&amp; r);
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>m_p&nbsp;=&nbsp;r.m_p;&nbsp;Py_XINCREF(</code><i>upcast</i><code>&lt;PyObject*&gt;(m_p));</code></dt>
+    </dl>
+
+    <h4><a name="handle-spec-modifiers">Class <code>handle</code>
+    modifiers</a></h4>
+<pre>
+handle&amp; operator=(handle const&amp; r);
+template&lt;typename Y&gt;
+handle&amp; operator=(handle&lt;Y&gt; const &amp; r); // never throws
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>Py_XINCREF(</code><i>upcast</i><code>&lt;PyObject*&gt;(r.m_p));&nbsp;Py_XDECREF(</code><i>
+      upcast</i><code>&lt;PyObject*&gt;(m_p));&nbsp;m_p&nbsp;=&nbsp;r.m_p;</code></dt>
+    </dl>
+<pre>
+T* release();
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b> <code>T* x = m_p;&nbsp;m_p&nbsp;=&nbsp;0;return
+      x;</code></dt>
+    </dl>
+<pre>
+void reset();
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Effects:</b>
+      <code>*this&nbsp;=&nbsp;handle&lt;T&gt;();</code></dt>
+    </dl>
+
+    <h4><a name="handle-spec-observers">Class <code>handle</code>
+    observers</a></h4>
+<pre>
+T* operator-&gt; () const;
+T* get() const;
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Returns:</b> <code>m_p;</code></dt>
+    </dl>
+<pre>
+T&amp; operator* () const;
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Returns:</b> <code>*m_p;</code></dt>
+    </dl>
+<pre>
+operator bool_type() const; // never throws
+</pre>
+
+    <dl class="function-semantics">
+      <dt><b>Returns:</b> 0 if <code>m_p&nbsp;==&nbsp;0</code>, a pointer
+      convertible to <code>true</code> otherwise.</dt>
+    </dl>
+
+    <h2><a name="functions"></a>Functions</h2>
+
+    <h3><a name="borrowed-spec"></a><code>borrowed</code></h3>
+<pre>
+template &lt;class T&gt;
+detail::borrowed&lt;T&gt;* borrowed(T* p)
+{
+    return (detail::borrowed&lt;T&gt;*)p;
+}
+</pre>
+
+    <h3><a name="allow_null-spec"></a><code>allow_null</code></h3>
+<pre>
+template &lt;class T&gt;
+null_ok&lt;T&gt;* allow_null(T* p)
+{
+    return (null_ok&lt;T&gt;*)p;
+}
+</pre>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+     13 November, 2002 
+    <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p class="c4">&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002
+.</p>
+  </body>
+</html>
+

doc/v2/has_back_reference.html

@@ -0,0 +1,225 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
+<!-- Software License, Version 1.0. (See accompanying -->
+<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
+<html>
+  <head>
+    <meta name="generator" content=
+    "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
+    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+    <link rel="stylesheet" type="text/css" href="../boost.css">
+
+    <title>Boost.Python - &lt;boost/python/has_back_reference.hpp&gt;</title>
+
+    <style type="text/css">
+ p.c3 {font-style: italic}
+ h2.c2 {text-align: center}
+ h1.c1 {text-align: center}
+            </style>
+  </head>
+
+  <body>
+    <table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
+    "header">
+      <tr>
+        <td valign="top" width="300">
+          <h3><a href="../../../../index.htm"><img height="86" width="277"
+          alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
+        </td>
+
+        <td valign="top">
+          <h1 class="c1"><a href="../index.html">Boost.Python</a></h1>
+
+          <h2 class="c2">Header
+          &lt;boost/python/has_back_reference.hpp&gt;</h2>
+        </td>
+      </tr>
+    </table>
+    <hr>
+
+    <h2>Contents</h2>
+
+    <dl class="page-index">
+      <dt><a href="#introduction">Introduction</a></dt>
+
+      <dt><a href="#classes">Classes</a></dt>
+
+      <dd>
+        <dl class="page-index">
+          <dt><a href="#has_back_reference-spec">Class template
+          <code>has_back_reference</code></a></dt>
+
+          <dd>
+            <dl class="page-index">
+              <dt><a href="#has_back_reference-spec-synopsis">Class template
+              <code>has_back_reference</code> synopsis</a></dt>
+            </dl>
+          </dd>
+
+          <dt><a href="#examples">Example(s)</a></dt>
+        </dl>
+      </dd>
+    </dl>
+    <hr>
+
+    <h2><a name="introduction"></a>Introduction</h2>
+
+    <p><code>&lt;boost/python/has_back_reference.hpp&gt;</code> defines the
+    predicate metafunction <code>has_back_reference&lt;&gt;</code>, which can
+    be specialized by the user to indicate that a wrapped class instance
+    holds a <code>PyObject*</code> corresponding to a Python object.</p>
+
+    <h2><a name="classes"></a>Classes</h2>
+
+    <h3><a name="has_back_reference-spec"></a>Class template
+    <code>has_back_reference</code></h3>
+
+    <p>A unary metafunction whose <code>value</code> is true iff its argument
+    is a <code>pointer_wrapper&lt;&gt;</code>.</p>
+
+    <h4><a name="has_back_reference-spec-synopsis"></a>Class template
+    <code>has_back_reference</code> synopsis</h4>
+<pre>
+namespace boost { namespace python
+{
+    template&lt;class WrappedClass&gt; class has_back_reference
+    { 
+        typedef mpl::false_ type;
+    };
+}}
+</pre>
+    <p>A "<a href="../../../mpl/doc/refmanual/metafunction.html">
+    metafunction</a>" that is inspected by Boost.Python to determine how 
+    wrapped classes can be constructed.</p>
+
+    <dl class="traits-semantics">
+      <dt><code>type::value</code> is an integral constant convertible to bool
+      of unspecified type.</dt>
+
+      <dt>Specializations may substitute a <code>true</code>-valued integral constant wrapper for 
+      <code>type</code> iff for each invocation of
+      <code>class_&lt;WrappedClass&gt;::def(init&lt;</code>
+      <i>type-sequence...</i><code>&gt;())</code> and the implicitly wrapped
+      copy constructor (unless it is <a href="class.html#class_-spec">
+      noncopyable</a>), there exists a corresponding constructor 
+      <code>WrappedClass::WrappedClass(PyObject*,&nbsp;</code>
+      <i>type-sequence...</i><code>)</code>. If such a specialization exists,
+      the <code>WrappedClass</code> constructors will be called with a "back
+      reference" pointer to the corresponding Python object whenever they are
+      invoked from Python. The easiest way to provide this nested <code>
+type
+</code>
+ is to 
+      derive the specialization from <code>mpl::true_</code>.
+      </dt>
+    </dl>
+
+    <h2><a name="examples"></a>Example</h2>
+
+    <h3>C++ module definition</h3>
+<pre>
+#include &lt;boost/python/class.hpp&gt;
+#include &lt;boost/python/module.hpp&gt;
+#include &lt;boost/python/has_back_reference.hpp&gt;
+#include &lt;boost/python/handle.hpp&gt;
+#include &lt;boost/shared_ptr.hpp&gt;
+
+using namespace boost::python;
+using boost::shared_ptr;
+
+struct X
+{
+    X(PyObject* self) : m_self(self), m_x(0) {}
+    X(PyObject* self, int x) : m_self(self), m_x(x) {}
+    X(PyObject* self, X const& other) : m_self(self), m_x(other.m_x) {}
+    
+    handle&lt;&gt; self() { return handle&lt;&gt;(borrowed(m_self)); }
+    int get() { return m_x; }
+    void set(int x) { m_x = x; }
+
+    PyObject* m_self;
+    int m_x;
+};
+
+// specialize has_back_reference for X
+namespace boost { namespace python
+{
+  template &lt;&gt;
+  struct has_back_reference&lt;X&gt;
+    : mpl::true_
+  {};
+}}
+
+struct Y
+{
+    Y() : m_x(0) {}
+    Y(int x) : m_x(x) {}
+    int get() { return m_x; }
+    void set(int x) { m_x = x; }
+
+    int m_x;
+};
+
+shared_ptr&lt;Y&gt; 
+Y_self(shared_ptr&lt;Y&gt; self) { return self; }
+
+BOOST_PYTHON_MODULE(back_references)
+{
+    class_&lt;X&gt;("X")
+       .def(init&lt;int&gt;())
+       .def("self", &amp;X::self)
+       .def("get", &amp;X::get)
+       .def("set", &amp;X::set)
+       ;
+
+    class_&lt;Y, shared_ptr&lt;Y&gt; &gt;("Y")
+       .def(init&lt;int&gt;())
+       .def("get", &amp;Y::get)
+       .def("set", &amp;Y::set)
+       .def("self", Y_self)
+       ;
+}
+</pre>
+    The following Python session illustrates that <code>x.self()</code>
+    returns the same Python object on which it is invoked, while
+    <code>y.self()</code> must create a new Python object which refers to the
+    same Y instance. 
+
+    <h3>Python code</h3>
+<pre>
+&gt;&gt;&gt; from back_references import *
+&gt;&gt;&gt; x = X(1)
+&gt;&gt;&gt; x2 = x.self()
+&gt;&gt;&gt; x2 is x
+<b>1</b>
+&gt;&gt;&gt; (x.get(), x2.get())
+(1, 1)
+&gt;&gt;&gt; x.set(10)
+&gt;&gt;&gt; (x.get(), x2.get())
+(10, 10)
+&gt;&gt;&gt;
+&gt;&gt;&gt;
+&gt;&gt;&gt; y = Y(2)
+&gt;&gt;&gt; y2 = y.self()
+&gt;&gt;&gt; y2 is y
+<b>0</b>
+&gt;&gt;&gt; (y.get(), y2.get())
+(2, 2)
+&gt;&gt;&gt; y.set(20)
+&gt;&gt;&gt; (y.get(), y2.get())
+(20, 20)
+</pre>
+
+    <p>Revised 
+    <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
+  18 July, 2004
+  <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
+    </p>
+
+    <p class="c3">&copy; Copyright <a href=
+    "http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002
+.</p>
+  </body>
+</html>
+