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115 Commits

Author SHA1 Message Date
Dave Abrahams
aed45d59d8 Branch for developing Bitten client/server testing
[SVN r41004]
2007-11-10 22:53:12 +00:00
Dave Abrahams
6a3085ad5d Merging some of the more obvious changes from RC_1_34_0
[SVN r40714]
2007-11-03 03:25:13 +00:00
Joel de Guzman
190d0d7ea6 replacing reinterpret_cast with static_cast<PySliceObject*>(static_cast<void*>(i))
[SVN r40712]
2007-11-03 03:05:26 +00:00
Eric Niebler
8b915a15ff merge Changeset 37947
[SVN r40675]
2007-11-02 04:35:01 +00:00
Dave Abrahams
90c5c19220 Take out print statement I added for debugging purposes.
[SVN r40536]
2007-10-28 19:24:02 +00:00
Dave Abrahams
cfe6f96f69 Closes #1379, really this time. The old code would sandwich argv[1] between quotes and interpret it as a string, so backslashes in windows paths were interpreted as escape sequences.
[SVN r40535]
2007-10-28 19:22:21 +00:00
Vladimir Prus
77907c5369 Make sure every library can be installed by using
bjam stage|install

in libs/<library>/build.


[SVN r40475]
2007-10-26 09:04:25 +00:00
Rene Rivera
512b30c971 Do not refer to nonexistent target when python is not configured.
[SVN r40216]
2007-10-20 16:36:18 +00:00
Rene Rivera
f005518686 Fix build system error when Python is not configured, without preventing the BPL target from being declared. Instead the target is now unbuildable, and will be skipped when Python is not configured.
[SVN r40156]
2007-10-18 16:11:41 +00:00
Rene Rivera
274a219965 Remove BPL build conditional as it prevents normal build failures.
[SVN r39731]
2007-10-06 19:46:39 +00:00
Ralf W. Grosse-Kunstleve
abc4abf84a gcc 4.3.0 compatibility (resolves new "changes meaning" error)
[SVN r39434]
2007-09-20 23:20:45 +00:00
Nikolay Mladenov
94a3ced83a fixed cpp signature related test failure
[SVN r39372]
2007-09-18 17:51:47 +00:00
Nikolay Mladenov
7eb0c678ee epydoc friendlier formatting
[SVN r39371]
2007-09-18 17:32:06 +00:00
Nikolay Mladenov
92460adce6 tabs removes, code reformatting
[SVN r39370]
2007-09-18 17:28:23 +00:00
Nikolay Mladenov
8cfd3fb2ef epydoc friendlier formatting
[SVN r39368]
2007-09-18 17:16:31 +00:00
Nikolay Mladenov
62ef542eaf fixed problem reported by Neal Becker; added a test case
[SVN r39223]
2007-09-12 21:31:39 +00:00
Ralf W. Grosse-Kunstleve
5809078ba9 Patches by Nikolay Mladenov (nickm at sitius com): new pythonic signatures; docstring support for enums; fix unrelated Visual C++ 6 problem
[SVN r39191]
2007-09-11 16:53:50 +00:00
Vladimir Prus
04e54d670c Remove V1 Jamfiles
[SVN r38516]
2007-08-08 19:02:26 +00:00
Stefan Seefeld
dd7c0a7f3d Fix ticket #1115.
[SVN r38289]
2007-07-26 16:11:18 +00:00
Stefan Seefeld
71f54cc920 Fix ticket #1115.
[SVN r38288]
2007-07-26 14:41:41 +00:00
Thomas Witt
2851325748 Doc and build fixes by Dave Abrahams.
[SVN r38154]
2007-07-06 19:47:17 +00:00
Thomas Witt
bd606e5017 Fix #583.
[SVN r37947]
2007-06-08 18:30:46 +00:00
Thomas Witt
a5706ec3b0 Fixes for #583.
[SVN r37929]
2007-06-07 18:08:54 +00:00
Ralf W. Grosse-Kunstleve
9de994c0d1 Hans Meine's extra new-line for epydoc with reST compatibility
[SVN r37906]
2007-06-06 00:00:57 +00:00
Rene Rivera
a346c577cf Fix the abolute reference to the Boost sources inserted by Dave.
[SVN r37837]
2007-05-31 22:03:06 +00:00
Dave Abrahams
217e4ca8f8 Repair auto-configuration and allow this project to work with --build-dir
[SVN r37829]
2007-05-31 13:49:45 +00:00
Stefan Seefeld
f2f47f85c0 Enhance embedding python docs.
[SVN r37710]
2007-05-18 15:54:25 +00:00
Stefan Seefeld
e9caacc428 More fixes for embedding python docs.
[SVN r37709]
2007-05-18 15:52:55 +00:00
Stefan Seefeld
5070e84f70 Enhance documentation for embedding python.
[SVN r37708]
2007-05-18 15:22:43 +00:00
Stefan Seefeld
b130c93af6 Backport new eval() function from HEAD.
[SVN r37693]
2007-05-15 13:43:52 +00:00
Stefan Seefeld
fe23d9885f Add new eval() function.
[SVN r37560]
2007-05-02 13:11:20 +00:00
Ralf W. Grosse-Kunstleve
e7ee17b71b MIPSpro: undo Python 2.5.1 define (the define leads to many warnings)
[SVN r37502]
2007-04-25 04:45:17 +00:00
Dave Abrahams
5edb63d01c Some progress on Python build guide. Minor fixes to getting started guide.
[SVN r37418]
2007-04-11 23:35:08 +00:00
Dave Abrahams
f4b3aab7d4 Checkpoint before reorg
[SVN r37370]
2007-04-05 20:13:13 +00:00
Dave Abrahams
6af67d1a4c kill off BBv1 project archive
[SVN r37367]
2007-04-05 17:19:20 +00:00
Dave Abrahams
16d975ba5c Bringing forward BBv2/Python support and a few other things that were
obviously more up-to-date on the RC branch.

Removed the Boost.Python v1 zip archive.


[SVN r37346]
2007-04-03 17:10:53 +00:00
Dave Abrahams
4fc5cafd40 Some progress on new build/test guide.
[SVN r37333]
2007-04-02 05:24:25 +00:00
Stefan Seefeld
1b5cd10f7c Fix reference counting error.
[SVN r37312]
2007-03-28 18:12:08 +00:00
Stefan Seefeld
0f91872518 Fix import_ failure.
[SVN r37142]
2007-03-05 18:51:04 +00:00
Stefan Seefeld
dc6b2979e4 Add copyright notice.
[SVN r37132]
2007-03-02 17:16:51 +00:00
Stefan Seefeld
50034140c4 Fix boost::python::import.
[SVN r37120]
2007-03-01 15:17:29 +00:00
Dave Abrahams
08a6f35ec2 Correct testing bugs:
either changing assert(...) or BOOST_ASSERT(...) to BOOST_TEST
    (in my code only)

    or adding "return boost::report_errors();" where it was clearly
    missing (and a pure bug, in anyone's code).


[SVN r37057]
2007-02-24 22:40:59 +00:00
Dave Abrahams
67236ffbad New build instructions in progress
[SVN r36879]
2007-02-03 16:55:07 +00:00
Dave Abrahams
96ab7a80a4 Remove BBv1 for good
[SVN r36323]
2006-12-11 05:02:34 +00:00
Dave Abrahams
d8c3ff199e Remove BBv1 for good
[SVN r36321]
2006-12-11 03:35:10 +00:00
Dave Abrahams
0c4ebef579 Fix auto-link to look at the right variable.
Make boost-build.jam point at the v2 Boost.


[SVN r36318]
2006-12-11 02:54:48 +00:00
Dave Abrahams
8fe9d41b58 Cleaned out flotsam and improved comments
[SVN r36317]
2006-12-11 02:50:55 +00:00
Dave Abrahams
8a4590b2ef Enable auto-linking
[SVN r36291]
2006-12-07 17:44:05 +00:00
Ralf W. Grosse-Kunstleve
d67b040683 fixes to support pickling of enums (by Shashank Bapat)
[SVN r36256]
2006-12-03 20:43:48 +00:00
Beman Dawes
2db61657f2 Add copyright, license
[SVN r35905]
2006-11-07 19:11:57 +00:00
Dave Abrahams
6d2ee96ba3 improve error message
[SVN r35822]
2006-11-03 16:34:53 +00:00
Stefan Seefeld
a74c8e3da3 Fix symbol visibility.
[SVN r35754]
2006-10-27 21:19:47 +00:00
Ralf W. Grosse-Kunstleve
9f4d39d9fe correct trivial, obvious accident: stray line removed
[SVN r35599]
2006-10-13 22:06:17 +00:00
Dave Abrahams
31c19644ed make numpy tests portable to Darwin with older docutils
[SVN r35597]
2006-10-13 21:34:26 +00:00
Dave Abrahams
600d444136 Fix some problems with testing on old docutils installations
[SVN r35594]
2006-10-13 19:35:28 +00:00
Dave Abrahams
c3bd0fcbad Make object comparison operators return object instead of bool, to
accomodate strange beasts like numarray arrays that return arrays that
can't be used as truth values from their comparison ops.

Fix numpy test for portability with old doctest (again!)


[SVN r35572]
2006-10-12 09:07:07 +00:00
Dave Abrahams
991a7c198a Workaround vc6 bugs
[SVN r35568]
2006-10-12 06:41:55 +00:00
Dave Abrahams
9b67f0447d Suppress a couple of msvc class/struct warnings
[SVN r35567]
2006-10-12 06:41:18 +00:00
Dave Abrahams
b714f6cc23 Adjust tests to account for numarray behavior differences
[SVN r35539]
2006-10-10 22:44:09 +00:00
Dave Abrahams
479a6ba4fc Try for backward compatibility with older versions of doctest
[SVN r35535]
2006-10-10 18:12:43 +00:00
Dave Abrahams
d78836b828 Fix lots of bugs in the numeric interface and tests.
Tests:
* Coerce a result to bool to deal with Python's new Bool type
* Better reporting of mismatches in expected and received results
* Remove bogus nullary y.astype() call
* Fix all uses of trace and diagonal so they don't cause errors
* Use appropriate typecodes
* Use doctest detailed API to run just the relevant tests
* Factor out error handling from macro

API:
* Added get_module_name() function to get current numeric module
* new_(x) now returns an array instead of object
* Fixed the signatures of the factory() family of functions
* Updated docs accordingly.


[SVN r35528]
2006-10-09 04:05:25 +00:00
Dave Abrahams
7a59131d37 Fix missing #include
[SVN r35524]
2006-10-08 05:17:20 +00:00
Dave Abrahams
5ab00bc9c8 Fix long-standing misnaming of "factory" method as "array"
[SVN r35428]
2006-09-29 22:24:12 +00:00
Dave Abrahams
94500ae36d Tests and fixes for a bad interaction between wrapper<> and operators
support.  "self" arguments weren't getting unwrapped properly.


[SVN r35365]
2006-09-28 14:41:01 +00:00
Dave Abrahams
5e5d34cc36 Fixed broken links
[SVN r35329]
2006-09-26 04:23:32 +00:00
Ralf W. Grosse-Kunstleve
c6f2aa4ef2 new boost/python/ssize_t.hpp; avoids potential clash of Py_ssize_t typedef and PY_SSIZE_T_MIN/MAX macros with definitions from other libraries
[SVN r35325]
2006-09-26 00:25:07 +00:00
Dave Abrahams
c7fb2f7047 Attempt GCC-3.4.4 and 4.0.1 workarounds
[SVN r35276]
2006-09-22 15:12:04 +00:00
Vladimir Prus
afedc1cd9a Add tests
[SVN r35244]
2006-09-21 07:26:35 +00:00
Gottfried Ganßauge
070e02d7d5 Renamed from opaque_pointer_converter.html
[SVN r35242]
2006-09-21 07:07:14 +00:00
Dave Abrahams
ccc56c2a4c Apply Boost license, with permission from Prabhu Ramachandran.
[SVN r35240]
2006-09-21 03:43:59 +00:00
Dave Abrahams
e00a88ff49 Fix inspection issues
[SVN r35239]
2006-09-21 02:40:19 +00:00
Stefan Seefeld
e527bc860f Fix copyright issues.
[SVN r35236]
2006-09-20 22:30:39 +00:00
Dave Abrahams
921e306b9a Fix license/copyright
[SVN r35234]
2006-09-20 21:59:03 +00:00
Dave Abrahams
bed1d26904 Return an int, not a string, on success from
check_numeric_array_rich_slice, since that's what the tests expect.


[SVN r35184]
2006-09-18 22:21:50 +00:00
Dave Abrahams
41a342f026 vc6/7 workaround
[SVN r35164]
2006-09-18 18:25:12 +00:00
Dave Abrahams
cee8e07046 Checkin missing op_repr definition
[SVN r35153]
2006-09-18 02:59:31 +00:00
Dave Abrahams
0806e89964 More informative error messages
Better autoconfiguration


[SVN r35140]
2006-09-17 02:41:20 +00:00
Dave Abrahams
f5421ca6b2 Default to Python 2.4 in Unix builds
Applied contributed patches http://tinyurl.com/ndljr and
http://tinyurl.com/18r


[SVN r35138]
2006-09-16 18:43:53 +00:00
Ralf W. Grosse-Kunstleve
eea7697175 if __name__ == '__main__'
[SVN r35114]
2006-09-14 21:57:56 +00:00
Ralf W. Grosse-Kunstleve
777ce7b561 magic coding: iso-latin1 comment added to avoid Python SyntaxError
[SVN r35113]
2006-09-14 21:53:00 +00:00
Gottfried Ganßauge
864ece5539 cross module compatibility test for opaque
[SVN r35111]
2006-09-14 19:06:33 +00:00
Gottfried Ganßauge
2610eb9acb Type object for opaque initialized with PyType_Clear.
opaque is registered only if not another module has already registered
a conversion for that pointer type.
Doc update.


[SVN r35104]
2006-09-14 05:59:29 +00:00
Dave Abrahams
567a2c7b89 attempt unverified workaround for http://tinyurl.com/gvrgd
[SVN r35103]
2006-09-13 22:47:11 +00:00
Dave Abrahams
05070faf12 Attempt to capture better debugging info in output
[SVN r35079]
2006-09-12 23:58:40 +00:00
Dave Abrahams
ad8069314d Move definition of BOOST_PYTHON_SUPPRESS_REGISTRY_INITIALIZATION back
where it belongs.


[SVN r35076]
2006-09-12 22:37:09 +00:00
Dave Abrahams
9366c48351 add missing license/copyright info
[SVN r35068]
2006-09-11 22:08:18 +00:00
Dave Abrahams
5a14319753 SunPro workarounds
[SVN r35067]
2006-09-11 10:38:14 +00:00
Joel de Guzman
279a4f7888 Update
[SVN r35006]
2006-08-31 06:01:57 +00:00
Dave Abrahams
d3418d494c Restort BOOST_PYTHON_STATIC_LIB. We don't want to create exported symbols.
[SVN r34942]
2006-08-24 19:03:35 +00:00
Dave Abrahams
c839427246 Sun workaround
[SVN r34939]
2006-08-24 13:04:59 +00:00
Dave Abrahams
dd3a136b18 Attempted Sun workaround
[SVN r34914]
2006-08-22 11:50:35 +00:00
Dave Abrahams
48696918de Try not specifying static link, to see if it makes Darwin happy
[SVN r34871]
2006-08-11 15:50:21 +00:00
Dave Abrahams
88be35ddc2 Attempt Sun-5.8 workaround
[SVN r34864]
2006-08-11 00:47:48 +00:00
Gennaro Prota
9ee0d36a1d removed tabs (inspect tool)
[SVN r34722]
2006-07-24 22:25:35 +00:00
Gennaro Prota
f240e0bab6 removed tabs (inspect tool)
[SVN r34720]
2006-07-24 22:20:25 +00:00
Gennaro Prota
4081605e4b removed tabs (inspect tool)
[SVN r34719]
2006-07-24 22:14:15 +00:00
Gennaro Prota
f332ff2d89 minor fix: violation of min/max guidelines
[SVN r34717]
2006-07-24 22:04:05 +00:00
Vladimir Prus
ec77608840 Clarify comment
[SVN r34668]
2006-07-22 12:53:49 +00:00
Vladimir Prus
f5a69a1dab Windows fix: use <library>/pytho/python_for_extensions, not <use>, so that
we actually link to Python import lib on windows.


[SVN r34666]
2006-07-22 12:28:00 +00:00
Vladimir Prus
a1e865061c Don't link Boost.Python to python library, and don't require
<threading>multi for embedding applications.

* libs/python/build/Jamfile.v2: (boost_python): Don't link
  to /python//python. Use /python//python_for_extensions.

* libs/python/test/Jamfile.v2: Remove <threading>multi project
  requirements.
  (py-run): Link to /python//python.
  (exec): Likewise.

* tools/build/v2/tools/python.jam: (pthread): Declare.
  (init-unix): Add 'pthread' to extra-libs.
  (


[SVN r34662]
2006-07-22 07:12:10 +00:00
Ralf W. Grosse-Kunstleve
596e92404a old misunderstanding corrected (L-BFGS)
[SVN r34504]
2006-07-11 04:09:41 +00:00
Joel de Guzman
2640f5af94 new css
[SVN r34426]
2006-06-29 09:35:52 +00:00
Joel de Guzman
0605e9fdcf minor tweak
[SVN r34375]
2006-06-22 13:43:09 +00:00
Joel de Guzman
cf68da0b19 added test for vector<string>
[SVN r34374]
2006-06-22 13:33:46 +00:00
Joel de Guzman
d3c474b295 terminology tweak
[SVN r34360]
2006-06-20 14:01:12 +00:00
Joel de Guzman
c9300e07c2 added custom converter test for map indexing suite
[SVN r34359]
2006-06-20 00:33:22 +00:00
Ralf W. Grosse-Kunstleve
cab94a7bba adjustments for new MIPSpro 7.4.4
[SVN r34132]
2006-06-02 05:39:50 +00:00
Ralf W. Grosse-Kunstleve
caa9cb8268 Python 2.5 compatibility
[SVN r34017]
2006-05-18 22:41:14 +00:00
Ralf W. Grosse-Kunstleve
66ac61450e avoid Visual C++ 7.1 "resolved overload was found by argument-dependent lookup" warning
[SVN r34016]
2006-05-18 22:09:20 +00:00
Ralf W. Grosse-Kunstleve
59f81def56 Python include must appear before any system include
[SVN r34010]
2006-05-18 18:47:12 +00:00
Ralf W. Grosse-Kunstleve
92862028b7 MIPSpro 7.3.1 compatibility
[SVN r34009]
2006-05-18 18:46:26 +00:00
Ralf W. Grosse-Kunstleve
b0ba7dfc50 also exercise OVERLOADS with docstring
[SVN r34006]
2006-05-18 16:15:59 +00:00
Ralf W. Grosse-Kunstleve
fe3abeda9f much more informative pickle error messages if pickling is not enabled
[SVN r34004]
2006-05-18 15:49:41 +00:00
Markus Schöpflin
3fdfb30e33 Include python first, fixes error on Tru64/CXX.
[SVN r33454]
2006-03-23 09:38:03 +00:00
Vladimir Prus
cdcf8633bb Force multithreading for Python test.
Workaround for problem described in
http://thread.gmane.org/gmane.comp.lib.boost.devel/139601


[SVN r33434]
2006-03-22 09:53:34 +00:00
123 changed files with 4316 additions and 2220 deletions

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@@ -22,11 +22,12 @@ if ! [ python.configured ] && ! ( --without-python in [ modules.peek : ARGV ] )
}
}
if [ python.configured ] {
project boost/python
: source-location ../src
;
: 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
@@ -38,7 +39,6 @@ lib boost_python
str.cpp
slice.cpp
aix_init_module.cpp
converter/from_python.cpp
converter/registry.cpp
converter/type_id.cpp
@@ -59,6 +59,7 @@ lib boost_python
wrapper.cpp
import.cpp
exec.cpp
object/function_doc_signature.cpp
: # requirements
<link>static:<define>BOOST_PYTHON_STATIC_LIB
<define>BOOST_PYTHON_SOURCE
@@ -75,19 +76,19 @@ lib boost_python
# 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.
<library>/python//python_for_extensions
[ 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
;
}
else
{
ECHO "warning: Python location is not configured" ;
ECHO "warning: the Boost.Python library won't be built" ;
}
boost-install boost_python ;

File diff suppressed because it is too large Load Diff

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@@ -75,7 +75,7 @@ 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">
<h1><a class="toc-backref" href="#id27">3&nbsp;&nbsp;&nbsp;No-Install Quickstart</a></h1>
<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
@@ -273,14 +273,6 @@ from source, you might want to supply the <tt class="docutils literal"><span cla
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 class="admonition-windows-users-no-auto-link-support admonition">
<p class="first admonition-title">Windows Users: No Auto-Link Support</p>
<p class="last">Boost.Python does not yet support the <a class="reference external" href="../../../more/getting_started/windows.html#link-your-program-to-a-boost-library">auto-link</a> feature, so if
you're not using the <a class="reference internal" href="#no-install-quickstart">quickstart</a> method, you'll have to pay
attention to the names of generated libraries and add extra link
arguments not shown in the <a class="reference external" href="../../../more/getting_started/index.html">Getting Started Guide</a> to select the
right library.</p>
</div>
</div>
<div class="section" id="configuring-boost-build">
<h1><a class="toc-backref" href="#id33">5&nbsp;&nbsp;&nbsp;Configuring Boost.Build</a></h1>
@@ -309,7 +301,7 @@ 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="#no-install-quickstart">quickstart</a>
(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>
@@ -570,9 +562,6 @@ static and dynamic builds of Boost.Python:</p>
<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>
<p class="last">Be sure to read this section even if your compiler supports
auto-linking, as Boost.Python does not yet take advantage of
that feature.</p>
</td></tr>
</tbody>
</table>
@@ -631,7 +620,7 @@ python and associated libraries are built by adding
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.
You may also find</td></tr>
</td></tr>
</tbody>
</table>
</div>
@@ -639,7 +628,7 @@ You may also find</td></tr>
<div class="footer">
<hr class="footer" />
<a class="reference external" href="./building.rst">View document source</a>.
Generated on: 2007-05-07 18:58 UTC.
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>

View File

@@ -65,6 +65,8 @@ 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
=====================
@@ -326,17 +328,6 @@ 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.
.. Admonition:: Windows Users: No Auto-Link Support
Boost.Python does not yet support the `auto-link`_ feature, so if
you're not using the quickstart_ method, you'll have to pay
attention to the names of generated libraries and add extra link
arguments not shown in the `Getting Started Guide`_ to select the
right library.
.. _auto-link: ../../../more/getting_started/windows.html#link-your-program-to-a-boost-library
.. _quickstart: `no-install quickstart`_
Configuring Boost.Build
=======================
@@ -652,10 +643,6 @@ __ http://www.python.org/doc/current/inst/index.html
__ ../../../more/getting_started/windows.html#library-naming
__ ../../../more/getting_started/unix-variants.html#library-naming
Be sure to read this section even if your compiler supports
auto-linking, as Boost.Python does not yet take advantage of
that feature.
.. [#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
@@ -691,4 +678,3 @@ __ http://www.python.org/doc/current/inst/index.html
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.
You may also find

View File

@@ -32,7 +32,43 @@
<hr>
<dl class="page-index">
<dt>Current CVS</dt>
<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>

View File

@@ -1,14 +1,11 @@
<!-- 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">
<title>Chapter 1. python 1.0</title>
<link rel="stylesheet" href="boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<link rel="start" href="index.html" title="Chapter 1. python 1.0">
<link rel="next" href="python/hello.html" title=" Building Hello World">
<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%">
@@ -34,7 +31,7 @@
<div><p class="copyright">Copyright © 2002-2005 Joel
de Guzman, David Abrahams</p></div>
<div><div class="legalnotice">
<a name="id376848"></a><p>
<a name="id2632684"></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>)
@@ -96,10 +93,10 @@
code takes on the look of a kind of declarative interface definition language
(IDL).
</p>
<a name="quickstart.hello_world"></a><h2>
<a name="id447173"></a>
<a name="quickstart.hello_world"></a><h3>
<a name="id2595112"></a>
Hello World
</h2>
</h3>
<p>
Following C/C++ tradition, let's start with the "hello, world". A
C++ Function:
@@ -135,14 +132,20 @@
</pre>
<p>
</p>
<div class="blockquote"><blockquote class="blockquote"><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></blockquote></div>
<div class="blockquote"><blockquote class="blockquote">
<p>
</p>
<p>
<span class="emphasis"><em><span class="bold"><strong>Next stop... Building your Hello World
module from start to finish...</strong></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"><small><p>Last revised: August 31, 2006 at 05:59:58 GMT</p></small></td>
<td align="left"><small><p>Last revised: May 18, 2007 at 15:46:01 GMT</p></small></td>
<td align="right"><small></small></td>
</tr></table>
<hr>

View File

@@ -1,15 +1,12 @@
<!-- 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">
<title>Embedding</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<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="prev" href="object.html" title="Object Interface">
<link rel="next" href="iterators.html" title="Iterators">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
@@ -42,30 +39,28 @@
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="id462650"></a>
<a name="embedding.building_embedded_programs"></a><h3>
<a name="id2654982"></a>
Building embedded programs
</h2>
</h3>
<p>
To be able to use embedding in your programs, they have to be linked to both
Boost.Python's and Python's static link library.
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 static link 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.
Boost.Python's library comes in two variants. Both are located in Boost's
<code class="literal">/libs/python/build/bin-stage</code> subdirectory. On Windows, the
variants are called <code class="literal">boost_python.lib</code> (for release builds)
and <code class="literal">boost_python_debug.lib</code> (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 static link library can be found in the <tt class="literal">/libs</tt> subdirectory
Python's library can be found in the <code class="literal">/libs</code> 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
Additionally, Python's <code class="literal">/include</code> subdirectory has to be added
to your include path.
</p>
<p>
@@ -86,295 +81,171 @@ exe embedded_program # name of the executable
&lt;library-path&gt;$(PYTHON_LIB_PATH)
&lt;find-library&gt;$(PYTHON_EMBEDDED_LIBRARY) ;
</pre>
<a name="embedding.getting_started"></a><h2>
<a name="id462747"></a>
<a name="embedding.getting_started"></a><h3>
<a name="id2655076"></a>
Getting started
</h2>
</h3>
<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><br><br>
#include <code class="literal">&lt;boost/python.hpp&gt;</code><br><br>
</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>
to start the interpreter and create the <code class="literal"><span class="underline">_main</span>_</code>
module.<br><br>
</li>
<li>
Call other Python C API routines to use the interpreter.<br><br>
</li>
<li>
Call <a href="http://www.python.org/doc/current/api/initialization.html#l2h-656" target="_top">Py_Finalize</a>()
to stop the interpreter and release its resources.
</li>
</ol></div>
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>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.</strong></span>
</p>
</div>
<p>
(Of course, there can be other C++ code between all of these steps.)
</p>
<div class="blockquote"><blockquote class="blockquote"><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></blockquote></div>
<div class="blockquote"><blockquote class="blockquote">
<p>
</p>
<p>
<span class="emphasis"><em><span class="bold"><strong>Now that we can embed the interpreter in
our programs, lets see how to put it to use...</strong></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.
the <code class="literal">PyObject</code>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/C API requires you to do it <a href="http://www.python.org/doc/current/api/refcounts.html" target="_top">by
hand</a>. This is messy and especially hard to get right in the presence
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.reference_counting_handles_and_objects"></a><h2>
<a name="id462914"></a>
Reference-counting handles and objects
</h2>
<p>
There are two ways in which a function in the Python/C API can return a
<tt class="literal">PyObject*</tt>: as a <span class="emphasis"><em>borrowed reference</em></span>
or as a <span class="emphasis"><em>new reference</em></span>. Which of these a function uses,
is listed in that function's documentation. The two require slightely different
approaches to reference-counting but both can be 'handled' by Boost.Python.
</p>
<p>
For a function returning a <span class="emphasis"><em>borrowed reference</em></span> we'll
have to tell the <tt class="literal">handle</tt> that the <tt class="literal">PyObject*</tt>
is borrowed with the aptly named <a href="../../../../v2/handle.html#borrowed-spec" target="_top">borrowed</a>
function. Two functions returning borrowed references are <a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a>
and <a href="http://www.python.org/doc/current/api/moduleObjects.html#l2h-594" target="_top">PyModule_GetDict</a>.
The former returns a reference to an already imported module, the latter
retrieves a module's namespace dictionary. Let's use them to retrieve the
namespace of the <tt class="literal"><span class="underline">_main</span>_</tt>
module:
</p>
<pre class="programlisting">
<span class="identifier">object</span> <span class="identifier">main_module</span><span class="special">((</span>
<span class="identifier">handle</span><span class="special">&lt;&gt;(</span><span class="identifier">borrowed</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a><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>
</pre>
<p>
For a function returning a <span class="emphasis"><em>new reference</em></span> we can just
create a <tt class="literal">handle</tt> out of the raw <tt class="literal">PyObject*</tt>
without wrapping it in a call to borrowed. One such function that returns
a new reference is <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
which we'll discuss in the next section.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><b>Handle is a class <span class="emphasis"><em>template</em></span>,
so why haven't we been using any template parameters?</b></span><br> <br>
<tt class="literal">handle</tt> has a single template parameter specifying the
type of the managed object. This type is <tt class="literal">PyObject</tt> 99%
of the time, so the parameter was defaulted to <tt class="literal">PyObject</tt>
for convenience. Therefore we can use the shorthand <tt class="literal">handle&lt;&gt;</tt>
instead of the longer, but equivalent, <tt class="literal">handle&lt;PyObject&gt;</tt>.
</p>
<a name="using_the_interpreter.running_python_code"></a><h2>
<a name="id463241"></a>
<a name="using_the_interpreter.running_python_code"></a><h3>
<a name="id2655255"></a>
Running Python code
</h2>
</h3>
<p>
To run Python code from C++ there is a family of functions in the API starting
with the PyRun prefix. You can find the full list of these functions <a href="http://www.python.org/doc/current/api/veryhigh.html" target="_top">here</a>. They
all work similarly so we will look at only one of them, namely:
Boost.python provides three related functions to run Python code from C++.
</p>
<pre class="programlisting">
<span class="identifier">PyObject</span><span class="special">*</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span><span class="keyword">char</span> <span class="special">*</span><span class="identifier">str</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">start</span><span class="special">,</span> <span class="identifier">PyObject</span> <span class="special">*</span><span class="identifier">globals</span><span class="special">,</span> <span class="identifier">PyObject</span> <span class="special">*</span><span class="identifier">locals</span><span class="special">)</span>
<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>
<a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
takes the code to execute as a null-terminated (C-style) string in its <tt class="literal">str</tt>
parameter. The function returns a new reference to a Python object. Which
object is returned depends on the <tt class="literal">start</tt> paramater.
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">start</tt> parameter is the start symbol from the Python
grammar to use for interpreting the code. The possible values are:
</p>
<div class="informaltable">
<h4>
<a name="id463420"></a>
<span class="table-title">Start symbols</span>
</h4>
<table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a></th>
<th>for
interpreting isolated expressions</th>
</tr></thead>
<tbody>
<tr>
<td><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a></td>
<td>for
interpreting sequences of statements</td>
</tr>
<tr>
<td><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-60" target="_top">Py_single_input</a></td>
<td>for
interpreting a single statement</td>
</tr>
</tbody>
</table>
</div>
<p>
When using <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>,
the input string must contain a single expression and its result is returned.
When using <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>,
the string can contain an abitrary number of statements and None is returned.
<a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-60" target="_top">Py_single_input</a>
works in the same way as <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>
but only accepts a single statement.
</p>
<p>
Lastly, 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>
The <code class="literal">globals</code> and <code class="literal">locals</code> 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 <code class="literal"><span class="underline">_main</span>_</code>
module for both parameters.
</p>
<p>
We have already seen how to get the <tt class="literal"><span class="underline">_main</span>_</tt>
module's namespace so let's run some Python code in it:
Boost.python provides a function to import a module:
</p>
<pre class="programlisting">
<span class="identifier">object</span> <span class="identifier">main_module</span><span class="special">((</span>
<span class="identifier">handle</span><span class="special">&lt;&gt;(</span><span class="identifier">borrowed</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a><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">handle</span><span class="special">&lt;&gt;</span> <span class="identifier">ignored</span><span class="special">((</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><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> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">())</span>
<span class="special">));</span>
<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>
Because the Python/C API doesn't know anything about <tt class="literal">object</tt>s,
we used the object's <tt class="literal">ptr</tt> member function to retrieve the
<tt class="literal">PyObject*</tt>.
import imports a python module (potentially loading it into the running process
first), and returns it.
</p>
<p>
Let's import the <code class="literal"><span class="underline">_main</span>_</code>
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>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><b>Note</b></span> that we wrap
the return value of <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
in a (nameless) <tt class="literal">handle</tt> even though we are not interested
in it. If we didn't do this, the the returned object would be kept alive
unnecessarily. Unless you want to be a Dr. Frankenstein, always wrap <tt class="literal">PyObject*</tt>s
in <tt class="literal">handle</tt>s.
</p>
<a name="using_the_interpreter.beyond_handles"></a><h2>
<a name="id463926"></a>
Beyond handles
</h2>
<a name="using_the_interpreter.manipulating_python_objects"></a><h3>
<a name="id2655783"></a>
Manipulating Python objects
</h3>
<p>
It's nice that <tt class="literal">handle</tt> manages the reference counting details
for us, but other than that it doesn't do much. Often we'd like to have a
more useful 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 it's derivatives. We've
already seen that they can be constructed from a <tt class="literal">handle</tt>.
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 <code class="literal">object</code> class and its
derivatives. We've already seen that they can be constructed from a <code class="literal">handle</code>.
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">handle</span><span class="special">&lt;&gt;(</span><span class="identifier">borrowed</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a><span class="special">(</span><span class="string">"__main__"</span><span class="special">)))));</span>
<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">handle</span><span class="special">&lt;&gt;</span> <span class="identifier">ignored</span><span class="special">((</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span>
<span class="string">"result = 5 ** 2"</span>
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">())</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>
Here we create a dictionary object for the <code class="literal"><span class="underline">_main</span>_</code>
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 let <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
return the result directly with <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>:
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">handle</span><span class="special">&lt;&gt;(</span>
<a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span><span class="string">"5 ** 2"</span>
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()))</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 ** 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>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><b>Note</b></span> that <tt class="literal">object</tt>'s
member function to return the wrapped <tt class="literal">PyObject*</tt> is called
<tt class="literal">ptr</tt> instead of <tt class="literal">get</tt>. This makes sense
if you take into account the different functions that <tt class="literal">object</tt>
and <tt class="literal">handle</tt> perform.
</p>
<a name="using_the_interpreter.exception_handling"></a><h2>
<a name="id464549"></a>
<a name="using_the_interpreter.exception_handling"></a><h3>
<a name="id2656116"></a>
Exception handling
</h2>
</h3>
<p>
If an exception occurs in the execution of some Python code, the <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
function returns a null pointer. Constructing a <tt class="literal">handle</tt>
out of this null pointer throws <a href="../../../../v2/errors.html#error_already_set-spec" target="_top">error_already_set</a>,
so basically, the Python exception is automatically translated into a C++
exception when using <tt class="literal">handle</tt>:
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">handle</span><span class="special">&lt;&gt;(</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span>
<span class="string">"5/0"</span>
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()))</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="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
The <code class="literal">error_already_set</code> 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/C API in your catch-statement. This
can be as simple as calling <a href="http://www.python.org/doc/api/exceptionHandling.html#l2h-70" target="_top">PyErr_Print()</a>
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
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="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="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>
@@ -391,23 +262,6 @@ exe embedded_program # name of the executable
(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>
<p>
If you'd rather not have <tt class="literal">handle</tt> throw a C++ exception
when it is constructed, you can use the <a href="../../../../v2/handle.html#allow_null-spec" target="_top">allow_null</a>
function in the same way you'd use borrowed:
</p>
<pre class="programlisting">
<span class="identifier">handle</span><span class="special">&lt;&gt;</span> <span class="identifier">result</span><span class="special">((</span><span class="identifier">allow_null</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span>
<span class="string">"5/0"</span>
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()))));</span>
<span class="keyword">if</span> <span class="special">(!</span><span class="identifier">result</span><span class="special">)</span>
<span class="comment">// Python exception occurred
</span><span class="keyword">else</span>
<span class="comment">// everything went okay, it's safe to use the result
</span></pre>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>

View File

@@ -1,16 +1,13 @@
<!-- 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">
<title> Exception Translation</title>
<title>Exception Translation</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<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="iterators.html" title="Iterators">
<link rel="next" href="techniques.html" title=" General Techniques">
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<table cellpadding="2" width="100%">

View File

@@ -1,15 +1,12 @@
<!-- 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">
<title> Exposing Classes</title>
<title>Exposing Classes</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<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="hello.html" title=" Building Hello World">
<link rel="prev" href="hello.html" title="Building Hello World">
<link rel="next" href="functions.html" title="Functions">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
@@ -67,9 +64,9 @@
<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
Here, we wrote a C++ class wrapper that exposes the member functions <code class="literal">greet</code>
and <code class="literal">set</code>. Now, after building our module as a shared library,
we may use our class <code class="literal">World</code> in Python. Here's a sample Python
session:
</p>
<p>
@@ -85,7 +82,7 @@
<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>
Our previous example didn't have any explicit constructors. Since <code class="literal">World</code>
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
@@ -109,9 +106,9 @@
<span class="special">};</span>
</pre>
<p>
This time <tt class="literal">World</tt> has no default constructor; our previous
This time <code class="literal">World</code> 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 have to tell <code class="literal">class_&lt;World&gt;</code> about the constructor
we want to expose instead.
</p>
<pre class="programlisting">
@@ -127,13 +124,13 @@
<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>").
<code class="literal">init&lt;std::string&gt;()</code> exposes the constructor taking
in a <code class="literal">std::string</code> (in Python, constructors are spelled
"<code class="literal">"<span class="underline">_init</span>_"</code>").
</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
We can expose additional constructors by passing more <code class="literal">init&lt;...&gt;</code>s
to the <code class="literal">def()</code> member function. Say for example we have
another World constructor taking in two doubles:
</p>
<pre class="programlisting">
@@ -145,13 +142,13 @@
</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:
may use <code class="literal">no_init</code> 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>
This actually adds an <code class="literal"><span class="underline">_init</span>_</code>
method which always raises a Python RuntimeError exception.
</p>
</div>
@@ -161,8 +158,8 @@
<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>:
to be exposed may be regarded as <span class="bold"><strong>read-only</strong></span>
or <span class="bold"><strong>read-write</strong></span>. Consider this class <code class="literal">Var</code>:
</p>
<pre class="programlisting">
<span class="keyword">struct</span> <span class="identifier">Var</span>
@@ -173,7 +170,7 @@
<span class="special">};</span>
</pre>
<p>
Our C++ <tt class="literal">Var</tt> class and its data members can be exposed
Our C++ <code class="literal">Var</code> class and its data members can be exposed
to Python:
</p>
<pre class="programlisting">
@@ -194,8 +191,8 @@
<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>.
Note that <code class="literal">name</code> is exposed as <span class="bold"><strong>read-only</strong></span>
while <code class="literal">value</code> is exposed as <span class="bold"><strong>read-write</strong></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
@@ -227,7 +224,7 @@
<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>
can just be a different syntax for a method call. Wrapping our <code class="literal">Num</code>
class using Boost.Python:
</p>
<pre class="programlisting">
@@ -248,8 +245,8 @@
<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>
Take note that the class property <code class="literal">rovalue</code> is exposed as
<span class="bold"><strong>read-only</strong></span> since the <code class="literal">rovalue</code>
setter member function is not passed in:
</p>
<p>
@@ -276,7 +273,7 @@
<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>
And a set of C++ functions operating on <code class="literal">Base</code> and <code class="literal">Derived</code>
object instances:
</p>
<pre class="programlisting">
@@ -285,7 +282,7 @@
<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>:
We've seen how we can wrap the base class <code class="literal">Base</code>:
</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>
@@ -293,8 +290,8 @@
<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:
Now we can inform Boost.Python of the inheritance relationship between <code class="literal">Derived</code>
and its base class <code class="literal">Base</code>. 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>
@@ -310,15 +307,15 @@
member functions)
</li>
<li>
<span class="bold"><b>If</b></span> Base is polymorphic, <tt class="literal">Derived</tt>
<span class="bold"><strong>If</strong></span> Base is polymorphic, <code class="literal">Derived</code>
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.
<code class="literal">Base</code> can be passed where a pointer or reference to
<code class="literal">Derived</code> is expected.
</li>
</ol></div>
<p>
Now, we shall expose the C++ free functions <tt class="literal">b</tt> and <tt class="literal">d</tt>
and <tt class="literal">factory</tt>:
Now, we shall expose the C++ free functions <code class="literal">b</code> and <code class="literal">d</code>
and <code class="literal">factory</code>:
</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>
@@ -326,11 +323,11 @@
<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
Note that free function <code class="literal">factory</code> is being used to generate
new instances of class <code class="literal">Derived</code>. In such cases, we use
<code class="literal">return_value_policy&lt;manage_new_object&gt;</code> to instruct
Python to adopt the pointer to <code class="literal">Base</code> and hold the instance
in a new Python <code class="literal">Base</code> object until the the Python object
is destroyed. We shall see more of Boost.Python <a href="functions.html#python.call_policies" title="Call Policies">call
policies</a> later.
</p>
@@ -346,7 +343,7 @@
<p>
In this section, we shall 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:
to our <code class="literal">Base</code> class:
</p>
<pre class="programlisting">
<span class="keyword">struct</span> <span class="identifier">Base</span>
@@ -359,11 +356,11 @@
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
to our class <code class="computeroutput"><span class="identifier">Base</span></code>. 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
polymorphically <span class="bold"><strong>from C++</strong></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>
a class wrapper that derives from <code class="computeroutput"><span class="identifier">Base</span></code>
that will unintrusively hook into the virtual functions so that a Python
override may be called:
</p>
@@ -377,21 +374,25 @@
<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
Notice too that in addition to inheriting from <code class="computeroutput"><span class="identifier">Base</span></code>,
we also multiply- inherited <code class="computeroutput"><span class="identifier">wrapper</span><span class="special">&lt;</span><span class="identifier">Base</span><span class="special">&gt;</span></code> (See <a href="../../../../v2/wrapper.html" target="_top">Wrapper</a>).
The <code class="computeroutput"><span class="identifier">wrapper</span></code> template makes
the job of wrapping classes that are meant to overridden in Python, easier.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><b>MSVC6/7 Workaround</b></span><br>
<br> If you are using Microsoft Visual C++ 6 or 7, you have to write <tt class="computeroutput"><span class="identifier">f</span></tt> as:<br> <br> <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>.
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><strong>MSVC6/7 Workaround</strong></span><br>
<br> If you are using Microsoft Visual C++ 6 or 7, you have to write <code class="computeroutput"><span class="identifier">f</span></code> as:<br> <br> <code 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></code>.
</p>
</div>
<p>
BaseWrap's overridden virtual member function <code class="computeroutput"><span class="identifier">f</span></code>
in effect calls the corresponding method of the Python object through <code class="computeroutput"><span class="identifier">get_override</span></code>.
</p>
<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>:
Finally, exposing <code class="computeroutput"><span class="identifier">Base</span></code>:
</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>
@@ -399,22 +400,25 @@
<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
<code class="computeroutput"><span class="identifier">pure_virtual</span></code> signals Boost.Python
that the function <code class="computeroutput"><span class="identifier">f</span></code> is a
pure virtual function.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><b>member function and methods</b></span><br>
<br> 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>
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>member function and methods</strong></span><br>
<br> Python, like many object oriented languages uses the term <span class="bold"><strong>methods</strong></span>. Methods correspond roughly to C++'s <span class="bold"><strong>member functions</strong></span>
</p>
</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
wrapper</a> facilities. If we wish to wrap <span class="bold"><strong>non</strong></span>-pure-virtual
functions instead, the mechanism is a bit different.
</p>
<p>
@@ -429,8 +433,8 @@
<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:
had a pure virtual function <code class="literal">f</code>. If, however, its member
function <code class="literal">f</code> was not declared as pure virtual:
</p>
<pre class="programlisting">
<span class="keyword">struct</span> <span class="identifier">Base</span>
@@ -456,15 +460,19 @@
<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>.
Notice how we implemented <code class="computeroutput"><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">f</span></code>. Now,
we have to check if there is an override for <code class="computeroutput"><span class="identifier">f</span></code>.
If none, then we call <code class="computeroutput"><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">()</span></code>.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><b>MSVC6/7 Workaround</b></span><br>
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><strong>MSVC6/7 Workaround</strong></span><br>
<br> 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:<br> <br> <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>.
the line with the <code class="computeroutput"><span class="special">*</span><span class="identifier">note</span><span class="special">*</span></code> as:<br> <br> <code 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></code>.
</p>
</div>
<p>
Finally, exposing:
</p>
@@ -474,10 +482,10 @@
<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.
Take note that we expose both <code class="computeroutput"><span class="special">&amp;</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span></code> and <code class="computeroutput"><span class="special">&amp;</span><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">default_f</span></code>. Boost.Python needs to keep track
of 1) the dispatch function <code class="literal">f</code> and 2) the forwarding function
to its default implementation <code class="literal">default_f</code>. There's a special
<code class="literal">def</code> function for this purpose.
</p>
<p>
In Python, the results would be as expected:
@@ -493,14 +501,14 @@
<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>:
Calling <code class="literal">base.f()</code>:
</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>:
Calling <code class="literal">derived.f()</code>:
</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>
@@ -510,17 +518,17 @@
<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="id453009"></a>
<a name="class_operators_special_functions.python_operators"></a><h3>
<a name="id2646169"></a>
Python Operators
</h2>
</h3>
<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
Consider a file position class <code class="literal">FilePos</code> and a set of operators
that take on FilePos instances:
</p>
<p>
@@ -553,16 +561,16 @@
<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
<code class="literal">self</code> refers to FilePos object. Also, not every class
<code class="literal">T</code> that you might need to interact with in an operator
expression is (cheaply) default-constructible. You can use <code class="literal">other&lt;T&gt;()</code>
in place of an actual <code class="literal">T</code> instance when writing "self
expressions".
</p>
<a name="class_operators_special_functions.special_methods"></a><h2>
<a name="id453761"></a>
<a name="class_operators_special_functions.special_methods"></a><h3>
<a name="id2646853"></a>
Special Methods
</h2>
</h3>
<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
@@ -588,14 +596,17 @@
<p>
Need we say more?
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> 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>.
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> What is the business of <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></code>? Well, the method <code class="computeroutput"><span class="identifier">str</span></code>
requires the <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></code>
to do its work (i.e. <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></code> is used by the method defined by
<code 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></code>.
</p>
</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"><small>Copyright © 2002-2005 Joel

View File

@@ -1,16 +1,13 @@
<!-- 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">
<title>Functions</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<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="exposing.html" title=" Exposing Classes">
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<table cellpadding="2" width="100%">
@@ -41,12 +38,18 @@
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>
<span class="emphasis"><em>Read on...</em></span>
</p></blockquote></div>
<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>.
<code class="literal">&gt;&gt;&gt; import this</code>.
</p>
<pre class="programlisting">&gt;&gt;&gt; import this
The Zen of Python, by Tim Peters
@@ -65,7 +68,7 @@ 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.
Although never is often better than <span class="bold"><strong>right</strong></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!
@@ -93,9 +96,9 @@ Namespaces are one honking great idea -- let's do more of those!
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="identifier">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">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="identifier">CRASH</span><span class="special">!</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?
@@ -123,19 +126,19 @@ Namespaces are one honking great idea -- let's do more of those!
</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>
<code class="literal">f</code> is called passing in a reference to <code class="literal">y</code>
and a pointer to <code class="literal">z</code>
</li>
<li>
A reference to <tt class="literal">y.x</tt> is returned
A reference to <code class="literal">y.x</code> is returned
</li>
<li>
<tt class="literal">y</tt> is deleted. <tt class="literal">x</tt> is a dangling reference
<code class="literal">y</code> is deleted. <code class="literal">x</code> is a dangling reference
</li>
<li>
<tt class="literal">x.some_method()</tt> is called
<code class="literal">x.some_method()</code> is called
</li>
<li><span class="bold"><b>BOOM!</b></span></li>
<li><span class="bold"><strong>BOOM!</strong></span></li>
</ol></div>
<p>
We could copy result into a new object:
@@ -165,16 +168,16 @@ Namespaces are one honking great idea -- let's do more of those!
<span class="special">};</span>
</pre>
<p>
Notice that the data member <tt class="literal">z</tt> is held by class Y using
Notice that the data member <code class="literal">z</code> 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="identifier">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="identifier">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="identifier">CRASH</span><span class="special">!</span>
<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:
For reference, here's the implementation of <code class="literal">f</code> 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>
@@ -188,33 +191,33 @@ Namespaces are one honking great idea -- let's do more of those!
</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>
<code class="literal">f</code> is called passing in a reference to <code class="literal">y</code>
and a pointer to <code class="literal">z</code>
</li>
<li>
A pointer to <tt class="literal">z</tt> is held by <tt class="literal">y</tt>
A pointer to <code class="literal">z</code> is held by <code class="literal">y</code>
</li>
<li>
A reference to <tt class="literal">y.x</tt> is returned
A reference to <code class="literal">y.x</code> is returned
</li>
<li>
<tt class="literal">z</tt> is deleted. <tt class="literal">y.z</tt> is a dangling pointer
<code class="literal">z</code> is deleted. <code class="literal">y.z</code> is a dangling pointer
</li>
<li>
<tt class="literal">y.z_value()</tt> is called
<code class="literal">y.z_value()</code> is called
</li>
<li>
<tt class="literal">z-&gt;value()</tt> is called
<code class="literal">z-&gt;value()</code> is called
</li>
<li><span class="bold"><b>BOOM!</b></span></li>
<li><span class="bold"><strong>BOOM!</strong></span></li>
</ol></div>
<a name="call_policies.call_policies"></a><h2>
<a name="id455614"></a>
<a name="call_policies.call_policies"></a><h3>
<a name="id2648560"></a>
Call Policies
</h2>
</h3>
<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>
In our example, <code class="literal">return_internal_reference</code> and <code class="literal">with_custodian_and_ward</code>
are our friends:
</p>
<pre class="programlisting">
@@ -223,27 +226,27 @@ Namespaces are one honking great idea -- let's do more of those!
<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
What are the <code class="literal">1</code> and <code class="literal">2</code> 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>".
Informs Boost.Python that the first argument, in our case <code class="literal">Y&amp;
y</code>, is the owner of the returned reference: <code class="literal">X&amp;</code>.
The "<code class="literal">1</code>" simply specifies the first argument.
In short: "return an internal reference <code class="literal">X&amp;</code> owned
by the 1st argument <code class="literal">Y&amp; y</code>".
</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>).
(i.e. the 2nd argument: <code class="literal">Z* z</code>) is dependent on the lifetime
of the argument indicated by custodian (i.e. the 1st argument: <code class="literal">Y&amp;
y</code>).
</p>
<p>
It is also important to note that we have defined two policies above. Two
@@ -260,42 +263,45 @@ Namespaces are one honking great idea -- let's do more of those!
</p>
<div class="itemizedlist"><ul type="disc">
<li>
<span class="bold"><b>with_custodian_and_ward</b></span><br> Ties lifetimes
<span class="bold"><strong>with_custodian_and_ward</strong></span><br> Ties lifetimes
of the arguments
</li>
<li>
<span class="bold"><b>with_custodian_and_ward_postcall</b></span><br>
<span class="bold"><strong>with_custodian_and_ward_postcall</strong></span><br>
Ties lifetimes of the arguments and results
</li>
<li>
<span class="bold"><b>return_internal_reference</b></span><br> Ties lifetime
<span class="bold"><strong>return_internal_reference</strong></span><br> 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><br>
<span class="bold"><strong>return_value_policy&lt;T&gt; with T one of:</strong></span><br>
</li>
<li>
<span class="bold"><b>reference_existing_object</b></span><br> naive
<span class="bold"><strong>reference_existing_object</strong></span><br> naive
(dangerous) approach
</li>
<li>
<span class="bold"><b>copy_const_reference</b></span><br> Boost.Python
<span class="bold"><strong>copy_const_reference</strong></span><br> Boost.Python
v1 approach
</li>
<li>
<span class="bold"><b>copy_non_const_reference</b></span><br>
<span class="bold"><strong>copy_non_const_reference</strong></span><br>
</li>
<li>
<span class="bold"><b>manage_new_object</b></span><br> Adopt a pointer
<span class="bold"><strong>manage_new_object</strong></span><br> Adopt a pointer
and hold the instance
</li>
</ul></div>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span> <span class="bold"><b>Remember the Zen, Luke:</b></span><br>
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span> <span class="bold"><strong>Remember the Zen, Luke:</strong></span><br>
<br> "Explicit is better than implicit"<br> "In the face
of ambiguity, refuse the temptation to guess"<br>
</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>
@@ -356,21 +362,21 @@ Namespaces are one honking great idea -- let's do more of those!
<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>
pointers carry no default argument info. Take a function <code class="literal">f</code>
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
But the type of a pointer to the function <code class="literal">f</code> 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,
When we pass this function pointer to the <code class="literal">def</code> function,
there is no way to retrieve the default arguments:
</p>
<pre class="programlisting">
@@ -404,10 +410,10 @@ Namespaces are one honking great idea -- let's do more of those!
are overloaded with a common sequence of initial arguments
</li>
</ul></div>
<a name="default_arguments.boost_python_function_overloads"></a><h2>
<a name="id457647"></a>
<a name="default_arguments.boost_python_function_overloads"></a><h3>
<a name="id2650414"></a>
BOOST_PYTHON_FUNCTION_OVERLOADS
</h2>
</h3>
<p>
Boost.Python now has a way to make it easier. For instance, given a function:
</p>
@@ -425,19 +431,19 @@ Namespaces are one honking great idea -- let's do more of those!
</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>.
a class <code class="literal">foo_overloads</code> that can be passed on to <code class="literal">def(...)</code>.
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>
arguments, respectively. In our <code class="literal">foo</code> function the minimum
number of arguments is 1 and the maximum number of arguments is 4. The <code class="literal">def(...)</code>
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="id457963"></a>
<a name="default_arguments.boost_python_member_function_overloads"></a><h3>
<a name="id2650701"></a>
BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS
</h2>
</h3>
<p>
Objects here, objects there, objects here there everywhere. More frequently
than anything else, we need to expose member functions of our classes to
@@ -446,7 +452,7 @@ Namespaces are one honking great idea -- let's do more of those!
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>
Like <code class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</code>, <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code>
may be used to automatically create the thin wrappers for wrapping member
functions. Let's have an example:
</p>
@@ -467,11 +473,11 @@ Namespaces are one honking great idea -- let's do more of those!
<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>
will generate a set of thin wrappers for george's <code class="literal">wack_em</code>
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>:
in a class named <code class="literal">george_overloads</code> that can then be used
as an argument to <code class="literal">def(...)</code>:
</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>
@@ -480,13 +486,13 @@ Namespaces are one honking great idea -- let's do more of those!
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="id458323"></a>
<a name="default_arguments.init_and_optional"></a><h3>
<a name="id2651031"></a>
init and optional
</h2>
</h3>
<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>?
arguments or a sequence of overloads. Remember <code class="literal">init&lt;...&gt;</code>?
For example, given a class X with a constructor:
</p>
<pre class="programlisting">
@@ -503,7 +509,7 @@ Namespaces are one honking great idea -- let's do more of those!
<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>
Notice the use of <code class="literal">init&lt;...&gt;</code> and <code class="literal">optional&lt;...&gt;</code>
to signify the default (optional arguments).
</p>
</div>
@@ -511,8 +517,8 @@ Namespaces are one honking great idea -- let's do more of those!
<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
It was mentioned in passing in the previous section that <code class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</code>
and <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code> can also be
used for overloaded functions and member functions with a common sequence
of initial arguments. Here is an example:
</p>
@@ -554,24 +560,24 @@ Namespaces are one honking great idea -- let's do more of those!
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="id459095"></a>
<a name="auto_overloading.manual_wrapping"></a><h3>
<a name="id2651734"></a>
Manual Wrapping
</h2>
</h3>
<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,
It is important to emphasize however that <span class="bold"><strong>the overloaded
functions must have a common sequence of initial arguments</strong></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
automatic wrapping through <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code>
and its sister, <code class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</code>. 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
of initial arguments, we can use <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code>
to automatically wrap the first three of the <code class="literal">def</code>s and
manually wrap just the last. Here's how we'll do this:
</p>
<pre class="programlisting">

View File

@@ -1,16 +1,13 @@
<!-- 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">
<title> Building Hello World</title>
<title>Building Hello World</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<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="../index.html" title="Chapter 1. python 1.0">
<link rel="next" href="exposing.html" title=" Exposing Classes">
<link rel="next" href="exposing.html" title="Exposing Classes">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%">
@@ -28,26 +25,29 @@
<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="id377427"></a>
<a name="hello.from_start_to_finish"></a><h3>
<a name="id2595436"></a>
From Start To Finish
</h2>
</h3>
<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 shall outline the steps
necessary to achieve that. We shall use the build tool that comes bundled with
every boost distribution: <span class="bold"><b>bjam</b></span>.
every boost distribution: <span class="bold"><strong>bjam</strong></span>.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><b>Building without bjam</b></span><br>
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>Building without bjam</strong></span><br>
<br> 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>.<br>
There are of course other build tools apart from <code class="literal">bjam</code>.<br>
<br> 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>
</div>
<p>
We shall 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
@@ -78,7 +78,7 @@
if you are on Unix.
</p>
<p>
The tutorial example can be found in the directory: <tt class="literal">libs/python/example/tutorial</tt>.
The tutorial example can be found in the directory: <code class="literal">libs/python/example/tutorial</code>.
There, you can find:
</p>
<div class="itemizedlist"><ul type="disc">
@@ -90,20 +90,20 @@
</li>
</ul></div>
<p>
The <tt class="literal">hello.cpp</tt> file is our C++ hello world example. The
<tt class="literal">Jamfile</tt> is a minimalist <span class="emphasis"><em>bjam</em></span> script
The <code class="literal">hello.cpp</code> file is our C++ hello world example. The
<code class="literal">Jamfile</code> is a minimalist <span class="emphasis"><em>bjam</em></span> script
that builds the DLLs for us.
</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
or somewhere in your path such that <code class="literal">bjam</code> 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="id377613"></a>
<a name="hello.let_s_jam_"></a><h3>
<a name="id2595623"></a>
Let's Jam!
</h2>
</h3>
<p>
<span class="inlinemediaobject"><img src="../images/jam.png" alt="jam"></span>
</p>
@@ -123,13 +123,13 @@ extension hello # Declare a Python extension called hello
</pre>
<p>
First, we need to specify our location. You may place your project anywhere.
<tt class="literal">project-root</tt> allows you to do that.
<code class="literal">project-root</code> allows you to do that.
</p>
<pre class="programlisting">project-root ;
</pre>
<p>
By doing so, you'll need a Jamrules file. Simply copy the one in the <a href="../../../../../example/tutorial/Jamrules" target="_top">example/tutorial directory</a>
and tweak the <tt class="literal">path-global BOOST_ROOT</tt> to where your boost
and tweak the <code class="literal">path-global BOOST_ROOT</code> to where your boost
root directory is. The file has <a href="../../../../../example/tutorial/Jamrules" target="_top">detailed
instructions</a> you can follow.
</p>
@@ -139,7 +139,7 @@ extension hello # Declare a Python extension called hello
<pre class="programlisting">import python ;
</pre>
<p>
Finally we declare our <tt class="literal">hello</tt> extension:
Finally we declare our <code class="literal">hello</code> extension:
</p>
<pre class="programlisting">extension hello # Declare a Python extension called hello
: hello.cpp # source
@@ -151,20 +151,26 @@ extension hello # Declare a Python extension called hello
<p>
The last part tells BJam that we are depending on the Boost Python Library.
</p>
<a name="hello.running_bjam"></a><h2>
<a name="id377751"></a>
<a name="hello.running_bjam"></a><h3>
<a name="id2595752"></a>
Running bjam
</h2>
</h3>
<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>
Start it up.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote">
<p>
</p>
<p>
Start it up.
</p>
<p>
</p>
</blockquote></div>
<p>
Make sure that the environment is set so that we can invoke the C++ compiler.
With MSVC, that would mean running the <tt class="literal">Vcvars32.bat</tt> batch
With MSVC, that would mean running the <code class="literal">Vcvars32.bat</code> batch
file. For instance:
</p>
<pre class="programlisting">C:\Program Files\Microsoft Visual Studio .NET 2003\Common7\Tools\vsvars32.bat
@@ -177,21 +183,24 @@ extension hello # Declare a Python extension called hello
set PYTHON_VERSION=2.2
</pre>
<p>
The above assumes that the Python installation is in <tt class="literal">c:/dev/tools/python</tt>
The above assumes that the Python installation is in <code class="literal">c:/dev/tools/python</code>
and that we are using Python version 2.2. You'll have to tweak these appropriately.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span> Be sure not to include a third number, e.g. <span class="bold"><b>not</b></span> "2.2.1", even if that's the version you
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span> Be sure not to include a third number, e.g. <span class="bold"><strong>not</strong></span> "2.2.1", even if that's the version you
have.
</p>
</div>
<p>
Take note that you may also do that through the Jamrules file we put in our
project as detailed above. The file has <a href="../../../../../example/tutorial/Jamrules" target="_top">detailed
instructions</a> you can follow.
</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">"Jamfile"</tt>
Now we are ready... Be sure to <code class="literal">cd</code> to <code class="literal">libs/python/example/tutorial</code>
where the tutorial <code class="literal">"hello.cpp"</code> and the <code class="literal">"Jamfile"</code>
is situated.
</p>
<p>
@@ -254,8 +263,8 @@ b and object bin\tutorial\hello.pyd\vc-7_1\debug\threading-multi\hello.exp
if you are on Unix.
</p>
<p>
<tt class="literal">boost_python.dll</tt> and <tt class="literal">hello.pyd</tt> can be
found somewhere in your project's <tt class="literal">bin</tt> directory. After a
<code class="literal">boost_python.dll</code> and <code class="literal">hello.pyd</code> can be
found somewhere in your project's <code class="literal">bin</code> directory. After a
successful build, you make it possible for the system to find boost_python.dll
or libboost_python.so (usually done with LD_LIBRARY_PATH, DYLD_LIBRARY_PATH,
or some other variable on *nix and with PATH on Windows) and for Python to
@@ -273,9 +282,15 @@ b and object bin\tutorial\hello.pyd\vc-7_1\debug\threading-multi\hello.exp
</pre>
<p>
</p>
<div class="blockquote"><blockquote class="blockquote"><p>
<span class="bold"><b>There you go... Have fun!</b></span>
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote">
<p>
</p>
<p>
<span class="bold"><strong>There you go... Have fun!</strong></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>

View File

@@ -1,16 +1,13 @@
<!-- 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">
<title>Iterators</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%">
@@ -33,7 +30,7 @@
iterators, but these are two very different beasts.
</p>
<p>
<span class="bold"><b>C++ iterators:</b></span>
<span class="bold"><strong>C++ iterators:</strong></span>
</p>
<div class="itemizedlist"><ul type="disc">
<li>
@@ -48,7 +45,7 @@
</li>
</ul></div>
<p>
<span class="bold"><b>Python Iterators:</b></span>
<span class="bold"><strong>Python Iterators:</strong></span>
</p>
<div class="itemizedlist"><ul type="disc">
<li>
@@ -62,8 +59,8 @@
</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:
The typical Python iteration protocol: <code class="literal"><span class="bold"><strong>for y
in x...</strong></span></code> is as follows:
</p>
<p>
</p>
@@ -77,7 +74,7 @@
</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
as Python iterators. What we need to do is to produce appropriate <code class="computeroutput"><span class="identifier">__iter__</span></code> function from C++ iterators that
is compatible with the Python iteration protocol. For example:
</p>
<p>
@@ -94,7 +91,7 @@
<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>
<span class="bold"><strong>range</strong></span>
</p>
<p>
We can create a Python savvy iterator using the range function:
@@ -122,14 +119,14 @@
</li>
</ul></div>
<p>
<span class="bold"><b>iterator</b></span>
<span class="bold"><strong>iterator</strong></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.
Given a container <code class="literal">T</code>, iterator is a shortcut that simply
calls <code class="literal">range</code> with &amp;T::begin, &amp;T::end.
</p>
<p>
Let's put this into action... Here's an example from some hypothetical bogon
@@ -155,14 +152,14 @@
<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>
<span class="bold"><strong>stl_input_iterator</strong></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:
a Python iterator look like an STL iterator. For that, we use <code class="computeroutput"><span class="identifier">stl_input_iterator</span><span class="special">&lt;&gt;</span></code>.
Consider how we might implement a function that exposes <code 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></code> to Python:
</p>
<p>
</p>
@@ -181,7 +178,7 @@
</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>
Now in Python, we can assign any integer sequence to <code class="computeroutput"><span class="identifier">list_int</span></code>
objects:
</p>
<p>

View File

@@ -1,12 +1,9 @@
<!-- 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">
<title> Object Interface</title>
<title>Object Interface</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<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="functions.html" title="Functions">
@@ -38,13 +35,13 @@
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 shall see in this
are just instances of class <code class="literal">object</code>. We shall 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
C++ <code class="literal">object</code>s are as close as possible to Python. This should
minimize the learning curve significantly.
</p>
<p>
@@ -54,10 +51,10 @@
<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
Class <code class="literal">object</code> wraps <code class="literal">PyObject*</code>. All the
intricacies of dealing with <code class="literal">PyObject</code>s such as managing
reference counting are handled by the <code class="literal">object</code> class. C++
object interoperability is seamless. Boost.Python C++ <code class="literal">object</code>s
can in fact be explicitly constructed from any C++ object.
</p>
<p>
@@ -102,7 +99,7 @@
<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
Boost.Python comes with a set of derived <code class="literal">object</code> types
corresponding to that of Python's:
</p>
<div class="itemizedlist"><ul type="disc">
@@ -126,32 +123,32 @@
</li>
</ul></div>
<p>
These derived <tt class="literal">object</tt> types act like real Python types.
These derived <code class="literal">object</code> 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:
Wherever appropriate, a particular derived <code class="literal">object</code> has
corresponding Python type's methods. For instance, <code class="literal">dict</code>
has a <code class="literal">keys()</code> 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>.
<code class="literal">make_tuple</code> 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
In C++, when Boost.Python <code class="literal">object</code>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.
<code class="literal">f</code>, as declared below, is wrapped, it will only accept
instances of Python's <code class="literal">str</code> 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>
@@ -175,15 +172,18 @@
<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
Demonstrates that you can write the C++ equivalent of <code class="literal">"format"
% x,y,z</code> in Python, which is useful since there's no easy way to
do that in std C++.
</p>
<p class="blurb">
<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.
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><strong>Beware</strong></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>
@@ -198,12 +198,12 @@
<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="id461067"></a>
<a name="derived_object_types.class__lt_t_gt__as_objects"></a><h3>
<a name="id2653534"></a>
class_&lt;T&gt; as objects
</h2>
</h3>
<p>
Due to the dynamic nature of Boost.Python objects, any <tt class="literal">class_&lt;T&gt;</tt>
Due to the dynamic nature of Boost.Python objects, any <code class="literal">class_&lt;T&gt;</code>
may also be one of these types! The following code snippet wraps the class
(type) object.
</p>
@@ -225,15 +225,15 @@
<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
can be achieved with the <code class="literal">extract&lt;T&gt;</code> 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
In the code above, we got a compiler error because Boost.Python <code class="literal">object</code>
can't be implicitly converted to <code class="literal">double</code>s. Instead, what
we wanted to do above can be achieved by writing:
</p>
<pre class="programlisting">
@@ -243,14 +243,14 @@
</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>.
Boost.Python <code class="literal">object</code>. The second line attempts to <span class="emphasis"><em>extract</em></span>
the <code class="literal">Vec2</code> object from held by the Boost.Python <code class="literal">object</code>.
</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>
<code class="literal">object</code> does not really hold a <code class="literal">Vec2</code>
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
<code class="literal">object</code>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>
@@ -260,7 +260,7 @@
<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>
<span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span> The astute reader might have noticed that the <code class="literal">extract&lt;T&gt;</code>
facility in fact solves the mutable copying problem:
</p>
<pre class="programlisting">
@@ -273,8 +273,8 @@
<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
has no <code class="literal">enum</code> type, we'll often want to expose our C++ enums
to Python as an <code class="literal">int</code>. 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:
@@ -293,16 +293,19 @@
</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>
<code class="literal">scope()</code>, which is usually the current module. The snippet
above creates a Python class derived from Python's <code class="literal">int</code>
type which is associated with the C++ type passed as its first parameter.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><b>what is a scope?</b></span><br>
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>what is a scope?</strong></span><br>
<br> 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>
</div>
<p>
You can access those values in Python as
</p>

View File

@@ -1,15 +1,12 @@
<!-- 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">
<title> General Techniques</title>
<title>General Techniques</title>
<link rel="stylesheet" href="../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
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<table cellpadding="2" width="100%">
@@ -53,7 +50,7 @@
<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,
<code class="literal">sounds</code>. Our library already has a neat C++ namespace hierarchy,
like so:
</p>
<pre class="programlisting">
@@ -96,15 +93,18 @@
<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>.
Compiling these files will generate the following Python extensions: <code class="literal">core.pyd</code>,
<code class="literal">io.pyd</code> and <code class="literal">filters.pyd</code>.
</p>
<p class="blurb">
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> The extension <tt class="literal">.pyd</tt> is used for python
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> The extension <code class="literal">.pyd</code> 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>
your system, like <code class="literal">.so</code> for Unix and <code class="literal">.dll</code>
for Windows, works just as well.
</p>
</div>
<p>
Now, we create this directory structure for our Python package:
</p>
@@ -115,12 +115,12 @@
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
The file <code class="literal">__init__.py</code> is what tells Python that the directory
<code class="literal">sounds/</code> 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>
Now our package is ready. All the user has to do is put <code class="literal">sounds</code>
into his <a href="http://www.python.org/doc/current/tut/node8.html#SECTION008110000000000000000" target="_top">PYTHONPATH</a>
and fire up the interpreter:
</p>
@@ -159,7 +159,7 @@
</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 be changed to <code class="literal">_core.pyd</code> as well, and we do the same
to the other extension modules. Now, we change our package hierarchy like
so:
</p>
@@ -167,12 +167,12 @@
__init__.py
core/
__init__.py
_core.pyd
<span class="underline">core.pyd
filters/
__init__.py
_filters.pyd
\</span>_init__.py
<span class="underline">filters.pyd
io/
__init__.py
\</span>_init__.py
_io.pyd
</pre>
<p>
@@ -187,11 +187,11 @@
<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
which is not what we want. But here enters the <code class="literal">__init__.py</code>
magic: everything that is brought to the <code class="literal">__init__.py</code> 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>:
entire namespace from <code class="literal">_core.pyd</code> to <code class="literal">core/__init__.py</code>.
So add this line of code to <code class="literal">sounds<span class="emphasis"><em>core</em></span>__init__.py</code>:
</p>
<pre class="programlisting">
<span class="keyword">from</span> <span class="identifier">_core</span> <span class="keyword">import</span> <span class="special">*</span>
@@ -208,10 +208,10 @@
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
Python function, <code class="literal">echo_noise</code>, to the <code class="literal">filters</code>
package. This function applies both the <code class="literal">echo</code> and <code class="literal">noise</code>
filters in sequence in the given <code class="literal">sound</code> object. We create
a file named <code class="literal">sounds/filters/echo_noise.py</code> and code our
function:
</p>
<pre class="programlisting">
@@ -222,14 +222,14 @@
<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>:
Next, we add this line to <code class="literal">sounds<span class="emphasis"><em>filters</em></span>__init__.py</code>:
</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:
from the <code class="literal">filters</code> 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>
@@ -263,7 +263,7 @@
</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++:
we have a class <code class="literal">point</code> in C++:
</p>
<p>
</p>
@@ -277,7 +277,7 @@
</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>:
Packages</a>, we can code directly into <code class="literal">geom/__init__.py</code>:
</p>
<p>
</p>
@@ -292,7 +292,7 @@
</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
<span class="bold"><strong>All</strong></span> point instances created from C++ will
also have this member function! This technique has several advantages:
</p>
<div class="itemizedlist"><ul type="disc">
@@ -391,7 +391,7 @@
<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>
Now you create a file <code class="literal">main.cpp</code>, which contains the <code class="literal">BOOST_PYTHON_MODULE</code>
macro, and call the various export functions inside it.
</p>
<pre class="programlisting">
@@ -427,12 +427,17 @@
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>
<p class="blurb">
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> 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
take a look at the <code class="literal">--multiple</code> option, that generates the
wrappers in various files as demonstrated here.
</p>
<p class="blurb">
</div>
<div class="sidebar">
<p class="title"><b></b></p>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> 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
@@ -440,6 +445,7 @@
</p>
</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"><small>Copyright © 2002-2005 Joel

View File

@@ -1365,11 +1365,6 @@ create a new scope around a class:
[def Py_Initialize [@http://www.python.org/doc/current/api/initialization.html#l2h-652 Py_Initialize]]
[def Py_Finalize [@http://www.python.org/doc/current/api/initialization.html#l2h-656 Py_Finalize]]
[def PyRun_String [@http://www.python.org/doc/current/api/veryhigh.html#l2h-55 PyRun_String]]
[def PyRun_File [@http://www.python.org/doc/current/api/veryhigh.html#l2h-56 PyRun_File]]
[def Py_eval_input [@http://www.python.org/doc/current/api/veryhigh.html#l2h-58 Py_eval_input]]
[def Py_file_input [@http://www.python.org/doc/current/api/veryhigh.html#l2h-59 Py_file_input]]
[def Py_single_input [@http://www.python.org/doc/current/api/veryhigh.html#l2h-60 Py_single_input]]
[def Py_XINCREF [@http://www.python.org/doc/current/api/countingRefs.html#l2h-65 Py_XINCREF]]
[def Py_XDECREF [@http://www.python.org/doc/current/api/countingRefs.html#l2h-67 Py_XDECREF]]
[def PyImport_AppendInittab [@http://www.python.org/doc/current/api/importing.html#l2h-137 PyImport_AppendInittab]]
@@ -1396,17 +1391,17 @@ all. So stay tuned... :-)
[h2 Building embedded programs]
To be able to use embedding in your programs, they have to be linked to
both Boost.Python's and Python's static link library.
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.
Boost.Python's static link library comes in two variants. Both are located
Boost.Python's library comes in two variants. Both are located
in Boost's [^/libs/python/build/bin-stage] subdirectory. On Windows, the
variants are called [^boost_python.lib] (for release builds) and
[^boost_python_debug.lib] (for debugging). If you can't find the libraries,
you probably haven't built Boost.Python yet. See
[@../../../building.html Building and Testing] on how to do this.
Python's static link library can be found in the [^/libs] subdirectory of
Python's library can be found in the [^/libs] subdirectory of
your Python directory. On Windows it is called pythonXY.lib where X.Y is
your major Python version number.
@@ -1444,7 +1439,11 @@ steps:
# Call other Python C API routines to use the interpreter.\n\n
# Call Py_Finalize() to stop the interpreter and release its resources.
[/ # Call Py_Finalize() to stop the interpreter and release its resources.]
[blurb __note__ [*Note that at this time you must not call Py_Finalize() to stop the
interpreter. This may be fixed in a future version of boost.python.]
]
(Of course, there can be other C++ code between all of these steps.)
@@ -1461,171 +1460,76 @@ messy and especially hard to get right in the presence of C++ exceptions.
Fortunately Boost.Python provides the [@../../../v2/handle.html handle] and
[@../../../v2/object.html object] class templates to automate the process.
[h2 Reference-counting handles and objects]
There are two ways in which a function in the Python/C API can return a
[^PyObject*]: as a ['borrowed reference] or as a ['new reference]. Which of
these a function uses, is listed in that function's documentation. The two
require slightely different approaches to reference-counting but both can
be 'handled' by Boost.Python.
For a function returning a ['borrowed reference] we'll have to tell the
[^handle] that the [^PyObject*] is borrowed with the aptly named
[@../../../v2/handle.html#borrowed-spec borrowed] function. Two functions
returning borrowed references are PyImport_AddModule and PyModule_GetDict.
The former returns a reference to an already imported module, the latter
retrieves a module's namespace dictionary. Let's use them to retrieve the
namespace of the [^__main__] module:
object main_module((
handle<>(borrowed(PyImport_AddModule("__main__")))));
object main_namespace = main_module.attr("__dict__");
For a function returning a ['new reference] we can just create a [^handle]
out of the raw [^PyObject*] without wrapping it in a call to borrowed. One
such function that returns a new reference is PyRun_String which we'll
discuss in the next section.
[blurb __note__ [*Handle is a class ['template], so why haven't we been using any template parameters?]\n
\n
[^handle] has a single template parameter specifying the type of the managed object. This type is [^PyObject] 99% of the time, so the parameter was defaulted to [^PyObject] for convenience. Therefore we can use the shorthand [^handle<>] instead of the longer, but equivalent, [^handle<PyObject>].
]
[h2 Running Python code]
To run Python code from C++ there is a family of functions in the API
starting with the PyRun prefix. You can find the full list of these
functions [@http://www.python.org/doc/current/api/veryhigh.html here]. They
all work similarly so we will look at only one of them, namely:
Boost.python provides three related functions to run Python code from C++.
PyObject* PyRun_String(char *str, int start, PyObject *globals, PyObject *locals)
object eval(str expression, object globals = object(), object locals = object())
object exec(str code, object globals = object(), object locals = object())
object exec_file(str filename, object globals = object(), object locals = object())
PyRun_String takes the code to execute as a null-terminated (C-style)
string in its [^str] parameter. The function returns a new reference to a
Python object. Which object is returned depends on the [^start] paramater.
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.
The [^start] parameter is the start symbol from the Python grammar to use
for interpreting the code. The possible values are:
[table Start symbols
[[Py_eval_input] [for interpreting isolated expressions]]
[[Py_file_input] [for interpreting sequences of statements]]
[[Py_single_input] [for interpreting a single statement]]
]
When using Py_eval_input, the input string must contain a single expression
and its result is returned. When using Py_file_input, the string can
contain an abitrary number of statements and None is returned.
Py_single_input works in the same way as Py_file_input but only accepts a
single statement.
Lastly, the [^globals] and [^locals] parameters are Python dictionaries
The [^globals] and [^locals] 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
[^__main__] module for both parameters.
We have already seen how to get the [^__main__] module's namespace so let's
run some Python code in it:
Boost.python provides a function to import a module:
object main_module((
handle<>(borrowed(PyImport_AddModule("__main__")))));
object import(str name)
import imports a python module (potentially loading it into the running process
first), and returns it.
Let's import the [^__main__] module and run some Python code in its namespace:
object main_module = import("__main__");
object main_namespace = main_module.attr("__dict__");
handle<> ignored((PyRun_String(
"hello = file('hello.txt', 'w')\n"
"hello.write('Hello world!')\n"
"hello.close()"
, Py_file_input
, main_namespace.ptr()
, main_namespace.ptr())
));
Because the Python/C API doesn't know anything about [^object]s, we used
the object's [^ptr] member function to retrieve the [^PyObject*].
object ignored = exec("hello = file('hello.txt', 'w')\n"
"hello.write('Hello world!')\n"
"hello.close()",
main_namespace);
This should create a file called 'hello.txt' in the current directory
containing a phrase that is well-known in programming circles.
[blurb
__note__ [*Note] that we wrap the return value of PyRun_String in a
(nameless) [^handle] even though we are not interested in it. If we didn't
do this, the the returned object would be kept alive unnecessarily. Unless
you want to be a Dr. Frankenstein, always wrap [^PyObject*]s in [^handle]s.
]
[h2 Manipulating Python objects]
[h2 Beyond handles]
It's nice that [^handle] manages the reference counting details for us, but
other than that it doesn't do much. Often we'd like to have a more useful
class to manipulate Python objects. But we have already seen such a class
above, and in the [@python/object.html previous section]: the aptly
named [^object] class and it's derivatives. We've already seen that they
can be constructed from a [^handle]. The following examples should further
illustrate this fact:
object main_module((
handle<>(borrowed(PyImport_AddModule("__main__")))));
Often we'd like to have a class to manipulate Python objects.
But we have already seen such a class above, and in the
[@python/object.html previous section]: the aptly named [^object] class
and its derivatives. We've already seen that they can be constructed from
a [^handle]. The following examples should further illustrate this fact:
object main_module = import("__main__");
object main_namespace = main_module.attr("__dict__");
handle<> ignored((PyRun_String(
"result = 5 ** 2"
, Py_file_input
, main_namespace.ptr()
, main_namespace.ptr())
));
object ignored = exec("result = 5 ** 2", main_namespace);
int five_squared = extract<int>(main_namespace["result"]);
Here we create a dictionary object for the [^__main__] 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 let
PyRun_String return the result directly with Py_eval_input:
object result((handle<>(
PyRun_String("5 ** 2"
, Py_eval_input
, main_namespace.ptr()
, main_namespace.ptr()))
));
the dictionary. Another way to achieve the same result is to use eval instead,
which returns the result directly:
object result = eval("5 ** 2");
int five_squared = extract<int>(result);
[blurb
__note__ [*Note] that [^object]'s member function to return the wrapped
[^PyObject*] is called [^ptr] instead of [^get]. This makes sense if you
take into account the different functions that [^object] and [^handle]
perform.
]
[h2 Exception handling]
If an exception occurs in the execution of some Python code, the PyRun_String
function returns a null pointer. Constructing a [^handle] out of this null
pointer throws [@../../../v2/errors.html#error_already_set-spec error_already_set],
so basically, the Python exception is automatically translated into a
C++ exception when using [^handle]:
If an exception occurs in the evaluation of the python expression,
[@../../../v2/errors.html#error_already_set-spec error_already_set] is thrown:
try
{
object result((handle<>(PyRun_String(
"5/0"
, Py_eval_input
, main_namespace.ptr()
, main_namespace.ptr()))
));
object result = eval("5/0");
// execution will never get here:
int five_divided_by_zero = extract<int>(result);
}
catch(error_already_set)
catch(error_already_set const &)
{
// handle the exception in some way
}
@@ -1639,7 +1543,7 @@ print the exception's traceback to the console, or comparing the type of the
exception with those of the [@http://www.python.org/doc/api/standardExceptions.html
standard exceptions]:
catch(error_already_set)
catch(error_already_set const &)
{
if (PyErr_ExceptionMatches(PyExc_ZeroDivisionError))
{
@@ -1655,21 +1559,6 @@ standard exceptions]:
(To retrieve even more information from the exception you can use some of the other
exception handling functions listed [@http://www.python.org/doc/api/exceptionHandling.html here].)
If you'd rather not have [^handle] throw a C++ exception when it is constructed, you
can use the [@../../../v2/handle.html#allow_null-spec allow_null] function in the same
way you'd use borrowed:
handle<> result((allow_null(PyRun_String(
"5/0"
, Py_eval_input
, main_namespace.ptr()
, main_namespace.ptr()))));
if (!result)
// Python exception occurred
else
// everything went okay, it's safe to use the result
[endsect]
[endsect] [/ Embedding]

View File

@@ -8,7 +8,7 @@
<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>
<link rel="stylesheet" type="text/css" href="../../../../boost.css">
<title>Boost.Python - CallPolicies Concept</title>
</head>
@@ -60,6 +60,7 @@
<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>
@@ -132,7 +133,16 @@
reference count must be decremented; if another existing object is
returned, its reference count must be incremented.</td>
</tr>
</table>
<tr>
<td valign="top"><code>P::extract_return_type</code></td>
<td>A model of <a href=
"../../../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>

View File

@@ -1,10 +1,12 @@
<!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>
<link rel="stylesheet" type="text/css" href="../../../../boost.css">
<title>Boost.Python - ResultConverter Concept</title>
</head>
<body link="#0000ff" vlink="#800080">
@@ -24,10 +26,12 @@
<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="#ResultConverter-concept">ResultConverter Concept</a></dt>
<dt><a href="#ResultConverterGenerator-concept">ResultConverterGenerator Concept</a></dt>
</dl>
<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>
@@ -79,6 +83,13 @@ denotes an object of type <code><b>R</b></code>.
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>

View File

@@ -139,6 +139,41 @@
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>

View File

@@ -82,6 +82,7 @@ namespace boost { namespace python
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>
@@ -161,7 +162,7 @@ struct return_value_policy : Base
<p>Revised
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
13 November, 2002
11 June, 2007
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->

View File

@@ -103,6 +103,8 @@ namespace boost { namespace python {
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
@@ -117,6 +119,18 @@ namespace boost { namespace python {
void
enable_signatures();
void
disable_py_signatures();
void
enable_py_signatures();
void
disable_cpp_signatures();
void
enable_cpp_signatures();
void
disable_all();
@@ -139,7 +153,7 @@ docstring_options(bool show_all=true);
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 C++
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>
@@ -154,12 +168,29 @@ docstring_options(bool show_user_defined, bool show_signatures);
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>, C++
<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
@@ -186,6 +217,10 @@ 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>
@@ -196,7 +231,7 @@ void enable_all();
<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 both settings simultaneously.</dt>
to manipulate all settings simultaneously.</dt>
</dl>
<h2><a name="examples" id="examples"></a>Examples</h2>
@@ -219,7 +254,7 @@ BOOST_PYTHON_MODULE(demo)
<pre>
&gt;&gt;&gt; import demo
&gt;&gt;&gt; print demo.foo.__doc__
foo doc
foo() -&gt; None : foo doc
C++ signature:
foo(void) -&gt; void
</pre>If compiled with
@@ -253,21 +288,33 @@ BOOST_PYTHON_MODULE(demo)
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 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>

View File

@@ -89,7 +89,7 @@ namespace boost { namespace python
template &lt;class T&gt;
class enum_ : public <a href="object.html#object-spec">object</a>
{
enum_(char const* name);
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();
};
@@ -99,7 +99,7 @@ namespace boost { namespace python
<h4><a name="enum_-spec-ctors"></a>Class template <code>enum_</code>
constructors</h4>
<pre>
enum_(char const* name);
enum_(char const* name, char const* doc=0);
</pre>
<dl class="function-semantics">
@@ -131,7 +131,7 @@ inline enum_&lt;T&gt;&amp; value(char const* name, T x);
<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>.
<code>name</code>d attribute.</dt>
<dt><b>Returns:</b> <code>*this</code></dt>
@@ -146,7 +146,7 @@ inline enum_&lt;T&gt;&amp; export_values();
<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>.
by calling <code>value()</code>.</dt>
<dt><b>Returns:</b> <code>*this</code></dt>

View File

@@ -38,6 +38,7 @@
<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>
@@ -52,6 +53,23 @@
<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,
@@ -109,7 +127,7 @@ void greet()
// Define greet function in Python.
object result = exec(
"def greet(self): \n"
"def greet(): \n"
" return 'Hello from Python!' \n",
global, global);
@@ -126,7 +144,7 @@ void greet()
we could also store it in an a file...</para>
<pre>
def greet(self):
def greet():
return 'Hello from Python!'
</pre>
<para>... and execute that instead.</para>

View File

@@ -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>

View File

@@ -214,6 +214,9 @@ namespace boost { namespace python { namespace self_ns {
<a href=
"#operator_-spec">operator_</a>&lt;<i>unspecified</i>&gt; str(self_t);
<a href=
"#operator_-spec">operator_</a>&lt;<i>unspecified</i>&gt; repr(self_t);
}}};
</pre>
The tables below describe the methods generated when the results of the
@@ -765,6 +768,15 @@ namespace boost { namespace python { namespace self_ns {
<td><code><a href=
"../../../conversion/lexical_cast.htm#lexical_cast">lexical_cast</a>&lt;std::string&gt;(x)</code></td>
</tr>
<tr>
<td><code>repr</code></td>
<td><code>__repr__</code></td>
<td><code><a href=
"../../../conversion/lexical_cast.htm#lexical_cast">lexical_cast</a>&lt;std::string&gt;(x)</code></td>
</tr>
</table>
<h3><a name="other-spec"></a>Class Template <code>other</code></h3>

370
doc/v2/pytype_function.html Normal file
View File

@@ -0,0 +1,370 @@
<!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/pytype_function.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/converter/pytype_function.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="#wrap_pytype-spec">Class
<code>wrap_pytype</code></a></dt>
<dd>
<dl class="page-index">
<dt><a href="#wrap_pytype-spec-synopsis">Class
<code>wrap_pytype</code> synopsis</a></dt>
</dl>
</dd>
</dl>
</dd>
<dd>
<dl class="page-index">
<dt><a href="#registered_pytype-spec">Class
<code>registered_pytype</code></a></dt>
<dd>
<dl class="page-index">
<dt><a href="#registered_pytype-spec-synopsis">Class
<code>registered_pytype</code> synopsis</a></dt>
</dl>
</dd>
</dl>
</dd>
<dd>
<dl class="page-index">
<dt><a href="#expected_from_python_type-spec">Class
<code>expected_from_python_type</code></a></dt>
<dd>
<dl class="page-index">
<dt><a href="#expected_from_python_type-spec-synopsis">Class
<code>expected_from_python_type</code> synopsis</a></dt>
</dl>
</dd>
</dl>
</dd>
<dd>
<dl class="page-index">
<dt><a href="#to_python_target_type-spec">Class
<code>to_python_target_type</code></a></dt>
<dd>
<dl class="page-index">
<dt><a href="#to_python_target_type-spec-synopsis">Class
<code>to_python_target_type</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>To support Pythonic signatures the converters should supply a <code>get_pytype</code> function
returning a pointer to the associated <code>PyTypeObject</code>. See for example
<a href="ResultConverter.html#ResultConverter-concept">ResultConverter</a> or
<a href="to_python_converter.html#to_python_converter-spec">to_python_converter</a>.
The classes in this header file are meant to be used when implmenting <code>get_pytype</code>.
There are also <code>_direct</code> versions of the templates of <code>class T</code> which
should be used with undecorated type parameter, expected to be in the conversion registry when the module loads.
</p>
<h2><a name="classes" id="classes"></a>Classes</h2>
<h3><a name="wrap_pytype-spec" id=
"wrap_pytype-spec"></a>Class
<code>wrap_pytype</code></h3>
<p>
This template generates a static <code>get_pytype</code> member returning the template parameter.
</p>
<h4><a name="wrap_pytype-spec-synopsis" id=
"wrap_pytype-spec-synopsis"></a>Class
<code>wrap_pytype</code> synopsis</h4>
<pre>
namespace boost { namespace python { namespace converter{
template &lt; PyTypeObject const *pytype &gt;
class wrap_pytype
{
public:
static PyTypeObject const *get_pytype(){return pytype; }
};
}}}
</pre>
<h3><a name="registered_pytype-spec" id=
"registered_pytype-spec"></a>Class
<code>registered_pytype</code></h3>
<p>
This template should be used with template parameters which are (possibly decorated)
types exported to python using <a href="class.html"><code>class_</code></a>.
The generated a static <code>get_pytype</code> member
returns the corresponding python type.
</p>
<h4><a name="registered_pytype-spec-synopsis" id=
"registered_pytype-spec-synopsis"></a>Class
<code>registered_pytype</code> synopsis</h4>
<pre>
namespace boost { namespace python { namespace converter{
template &lt; class T &gt;
class registered_pytype
{
public:
static PyTypeObject const *get_pytype();
};
}}}
</pre>
<h3><a name="expected_from_python_type-spec" id=
"expected_from_python_type-spec"></a>Class
<code>expected_from_python_type</code></h3>
<p>
This template generates a static <code>get_pytype</code> member which inspects the registered
<code>from_python</code> converters for the type <code>T</code> and returns a matching python type.
</p>
<h4><a name="expected_from_python_type-spec-synopsis" id=
"expected_from_python_type-spec-synopsis"></a>Class
<code>expected_from_python_type</code> synopsis</h4>
<pre>
namespace boost { namespace python { namespace converter{
template &lt; class T &gt;
class expected_from_python_type
{
public:
static PyTypeObject const *get_pytype();
};
}}}
</pre>
<h3><a name="to_python_target_type-spec" id=
"to_python_target_type-spec"></a>Class
<code>to_python_target_type</code></h3>
<p>
This template generates a static <code>get_pytype</code> member returning the
python type to which T can be converted.
</p>
<h4><a name="to_python_target_type-spec-synopsis" id=
"to_python_target_type-spec-synopsis"></a>Class
<code>to_python_target_type</code> synopsis</h4>
<pre>
namespace boost { namespace python { namespace converter{
template &lt; class T &gt;
class to_python_target_type
{
public:
static PyTypeObject const *get_pytype();
};
}}}
</pre>
<h2><a name="examples" id="examples"></a>Examples</h2>
This example presumes that someone has implemented the standard <a href=
"http://www.python.org/doc/2.2/ext/dnt-basics.html">noddy example
module</a> from the Python documentation, and placed the corresponding
declarations in <code>"noddy.h"</code>. Because
<code>noddy_NoddyObject</code> is the ultimate trivial extension type,
the example is a bit contrived: it wraps a function for which all
information is contained in the <i>type</i> of its return value.
<h3>C++ module definition</h3>
<pre>
#include &lt;boost/python/reference.hpp&gt;
#include &lt;boost/python/module.hpp&gt;
#include "noddy.h"
struct tag {};
tag make_tag() { return tag(); }
using namespace boost::python;
struct tag_to_noddy
#if defined BOOST_PYTHON_SUPPORTS_PY_SIGNATURES //unnecessary overhead if py signatures are not supported
: wrap_pytype<&amp;noddy_NoddyType> //inherits get_pytype from wrap_pytype
#endif
{
static PyObject* convert(tag const&amp; x)
{
return PyObject_New(noddy_NoddyObject, &amp;noddy_NoddyType);
}
};
BOOST_PYTHON_MODULE(to_python_converter)
{
def("make_tag", make_tag);
to_python_converter&lt;tag, tag_to_noddy
#if defined BOOST_PYTHON_SUPPORTS_PY_SIGNATURES //invalid if py signatures are not supported
, true
#endif
&gt;(); //"true" because tag_to_noddy has member get_pytype
}
</pre>
<p>The following example registers to and from python converters using the templates
<code>expected_from_python_type</code> and <code>to_pyhton_target_type</code>.
</p>
<pre>
#include &lt;boost/python/module.hpp&gt;
#include &lt;boost/python/def.hpp&gt;
#include &lt;boost/python/extract.hpp&gt;
#include &lt;boost/python/to_python_converter.hpp&gt;
#include &lt;boost/python/class.hpp&gt;
using namespace boost::python;
struct A
{
};
struct B
{
A a;
B(const A& a_):a(a_){}
};
// Converter from A to python int
struct BToPython
#if defined BOOST_PYTHON_SUPPORTS_PY_SIGNATURES //unnecessary overhead if py signatures are not supported
: converter::to_python_target_type&lt;A&gt; //inherits get_pytype
#endif
{
static PyObject* convert(const B& b)
{
return incref(object(b.a).ptr());
}
};
// Conversion from python int to A
struct BFromPython
{
BFromPython()
{
boost::python::converter::registry::push_back
( &amp;convertible
, &amp;construct
, type_id&lt; B &gt;()
#if defined BOOST_PYTHON_SUPPORTS_PY_SIGNATURES //invalid if py signatures are not supported
, &amp;converter::expected_from_python_type&lt;A&gt;::get_pytype//convertible to A can be converted to B
#endif
);
}
static void* convertible(PyObject* obj_ptr)
{
extract&lt;const A&&gt; ex(obj_ptr);
if (!ex.check()) return 0;
return obj_ptr;
}
static void construct(
PyObject* obj_ptr,
converter::rvalue_from_python_stage1_data* data)
{
void* storage = (
(converter::rvalue_from_python_storage&lt; B &gt;*)data)-&gt; storage.bytes;
extract&lt;const A&&gt; ex(obj_ptr);
new (storage) B(ex());
data->convertible = storage;
}
};
B func(const B& b) { return b ; }
BOOST_PYTHON_MODULE(pytype_function_ext)
{
to_python_converter&lt; B , BToPython
#if defined BOOST_PYTHON_SUPPORTS_PY_SIGNATURES //invalid if py signatures are not supported
,true
#endif
&gt;(); //has get_pytype
BFromPython();
class_&lt;A&gt;("A") ;
def("func", &amp;func);
}
&gt;&gt;&gt; from pytype_function_ext import *
&gt;&gt;&gt; print func.__doc__
func( (A)arg1) -> A :
C++ signature:
struct B func(struct B)
</pre>
<p><i>&copy; Copyright <a href="mailto:nickm at sitius dot com">Nikolay Mladenov</a> 2007.</i></p>
</body>
</html>

View File

@@ -609,6 +609,66 @@
</dl>
</dd>
<dd>
<a name="function_documentation"></a>
<h3>Function documentation</h3>
<dl class="index">
<dt><a href=
"function_doc_signature.html">function_doc_signature.hpp</a></dt>
<dd>
<dl class="index">
<dt><a href=
"function_doc_signature.html#classes">Classes</a></dt>
<dd>
<dl class="index">
<dt><a href=
"function_doc_signature.html#function_doc_signature_generator-spec">function_doc_signature_generator</a></dt>
</dl>
</dd>
</dl>
</dd>
</dl>
<dl class="index">
<dt><a href=
"pytype_function.html">pytype_function.hpp</a></dt>
<dd>
<dl class="index">
<dt><a href=
"pytype_function.html#classes">Classes</a></dt>
<dd>
<dl class="index">
<dt><a href=
"pytype_function.html#wrap_pytype-spec">wrap_pytype</a></dt>
</dl>
<dl class="index">
<dt><a href=
"pytype_function.html#expected_from_python_type-spec">expected_from_python_type</a></dt>
</dl>
<dl class="index">
<dt><a href=
"pytype_function.html#to_python_target_type-spec">to_python_target_type</a></dt>
</dl>
<dl class="index">
<dt><a href=
"pytype_function.html#registered_pytype-spec">registered_pytype</a></dt>
</dl>
</dd>
</dl>
</dd>
</dl>
</dd>
<dd>
<a name="models_of_call_policies"></a>
@@ -977,6 +1037,7 @@
<dd>
<dl class="index">
<dt><a href="exec.html#eval-spec">eval</a></dt>
<dt><a href="exec.html#exec-spec">exec</a></dt>
<dt><a href="exec.html#exec_file-spec">exec_file</a></dt>
</dl>

View File

@@ -125,6 +125,8 @@ namespace boost { namespace python
{
static PyObject* postcall(PyObject*, PyObject* result);
struct result_converter{ template &lt;class T&gt; struct apply; };
template &lt;class Sig&gt; struct extract_return_type : mpl::at_c&lt;Sig, arg_pos&gt;{};
};
}}
</pre>

View File

@@ -108,6 +108,23 @@
<td>A class type whose static member function <code>convert</code>
does the real work of the conversion.</td>
</tr>
<tr>
<td><code>bool has_get_pytype = false</code></td>
<td>
<code>PyTypeObject const * p = Conversion::get_pytype() </code>.</td>
<td><b>Optional member</b> - if <code>Conversion</code> has <code>get_pytype</code> member supply
<code>true</code> for this parameters.
If present <code>get_pytype</code> is used to document the return type
of functions using this conversion. The <code>get_pytype</code> may be implemented
using the classes and functions
from <a href="pytype_function.html"><code>pytype_function.hpp</code></a>
<b>NOTE :</b> For backward compatibility this parameter may be passed after
checking if <code>BOOST_PYTHON_SUPPORTS_PY_SIGNATURES</code> is defined (see
<a href="pytype_function.html#examples">here</a>).
</td>
</tr>
</table>
<h4><a name="to_python_converter-spec-synopsis"></a>Class template
@@ -115,7 +132,7 @@
<pre>
namespace boost { namespace python
{
template &lt;class T, class Conversion&gt;
template &lt;class T, class Conversion, bool convertion_has_get_pytype_member=false&gt;
struct to_python_converter
{
to_python_converter();
@@ -160,12 +177,16 @@ struct tag_to_noddy
{
return PyObject_New(noddy_NoddyObject, &amp;noddy_NoddyType);
}
static PyTypeObject const* get_pytype()
{
return &amp;noddy_NoddyType;
}
};
BOOST_PYTHON_MODULE(to_python_converter)
{
def("make_tag", make_tag);
to_python_converter&lt;tag, tag_to_noddy&gt;();
to_python_converter&lt;tag, tag_to_noddy, true&gt;(); //"true" because tag_to_noddy has member get_pytype
}
</pre>
@@ -195,7 +216,7 @@ BOOST_PYTHON_MODULE(to_python_converter)
<p>Revised
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
13 November, 2002
11 June, 2007
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
</p>

View File

@@ -10,8 +10,12 @@ use-project boost
# Set up the project-wide requirements that everything uses the
# boost_python library defined in the project whose global ID is
# /boost/python.
project
: requirements <library>/boost/python//boost_python ;
project boost-python-quickstart
: requirements <library>/boost/python//boost_python
;
# Make the definition of the python-extension rule available
import python ;
# Declare a Python extension called hello.
python-extension extending : extending.cpp ;
@@ -31,3 +35,9 @@ testing.run embedding
: # requirements
: test_embed ; # name of test
# Create a "test" target that runs all the tests
alias test : test_ext test_embed ;
# make sure the tests don't run by default
explicit test_ext test_embed test ;

View File

@@ -18,6 +18,7 @@ namespace { // Avoid cluttering the global namespace.
return boost::python::incref(
boost::python::make_tuple(p.first, p.second).ptr());
}
static PyTypeObject const *get_pytype () {return &PyTuple_Type; }
};
// Helper for convenience.
@@ -28,7 +29,9 @@ namespace { // Avoid cluttering the global namespace.
{
boost::python::to_python_converter<
std::pair<T1, T2>,
std_pair_to_tuple<T1, T2> >();
std_pair_to_tuple<T1, T2>,
true //std_pair_to_tuple has get_pytype
>();
}
};

View File

@@ -39,6 +39,9 @@ struct as_to_python_function
// but c'est la vie.
return ToPython::convert(*const_cast<T*>(static_cast<T const*>(x)));
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const * get_pytype() { return ToPython::get_pytype(); }
#endif
};
}}} // namespace boost::python::converter

View File

@@ -47,7 +47,7 @@ namespace detail
}
// Use expr to create the PyObject corresponding to x
# define BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(T, expr) \
# define BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(T, expr, pytype)\
template <> struct to_python_value<T&> \
: detail::builtin_to_python \
{ \
@@ -55,6 +55,10 @@ namespace detail
{ \
return (expr); \
} \
inline PyTypeObject const* get_pytype() const \
{ \
return (pytype); \
} \
}; \
template <> struct to_python_value<T const&> \
: detail::builtin_to_python \
@@ -63,6 +67,10 @@ namespace detail
{ \
return (expr); \
} \
inline PyTypeObject const* get_pytype() const \
{ \
return (pytype); \
} \
};
# define BOOST_PYTHON_ARG_TO_PYTHON_BY_VALUE(T, expr) \
@@ -77,25 +85,25 @@ namespace detail
}
// Specialize argument and return value converters for T using expr
# define BOOST_PYTHON_TO_PYTHON_BY_VALUE(T, expr) \
BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(T,expr) \
# define BOOST_PYTHON_TO_PYTHON_BY_VALUE(T, expr, pytype) \
BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(T,expr, pytype) \
BOOST_PYTHON_ARG_TO_PYTHON_BY_VALUE(T,expr)
// Specialize converters for signed and unsigned T to Python Int
# define BOOST_PYTHON_TO_INT(T) \
BOOST_PYTHON_TO_PYTHON_BY_VALUE(signed T, ::PyInt_FromLong(x)) \
BOOST_PYTHON_TO_PYTHON_BY_VALUE(signed T, ::PyInt_FromLong(x), &PyInt_Type) \
BOOST_PYTHON_TO_PYTHON_BY_VALUE( \
unsigned T \
, static_cast<unsigned long>(x) > static_cast<unsigned long>( \
(std::numeric_limits<long>::max)()) \
? ::PyLong_FromUnsignedLong(x) \
: ::PyInt_FromLong(x))
: ::PyInt_FromLong(x), &PyInt_Type)
// Bool is not signed.
#if PY_VERSION_HEX >= 0x02030000
BOOST_PYTHON_TO_PYTHON_BY_VALUE(bool, ::PyBool_FromLong(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(bool, ::PyBool_FromLong(x), &PyBool_Type)
#else
BOOST_PYTHON_TO_PYTHON_BY_VALUE(bool, ::PyInt_FromLong(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(bool, ::PyInt_FromLong(x), &PyInt_Type)
#endif
// note: handles signed char and unsigned char, but not char (see below)
@@ -108,25 +116,25 @@ BOOST_PYTHON_TO_INT(long)
// using Python's macro instead of Boost's - we don't seem to get the
// config right all the time.
# ifdef HAVE_LONG_LONG
BOOST_PYTHON_TO_PYTHON_BY_VALUE(signed BOOST_PYTHON_LONG_LONG, ::PyLong_FromLongLong(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(unsigned BOOST_PYTHON_LONG_LONG, ::PyLong_FromUnsignedLongLong(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(signed BOOST_PYTHON_LONG_LONG, ::PyLong_FromLongLong(x), &PyInt_Type)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(unsigned BOOST_PYTHON_LONG_LONG, ::PyLong_FromUnsignedLongLong(x), &PyInt_Type)
# endif
# undef BOOST_TO_PYTHON_INT
BOOST_PYTHON_TO_PYTHON_BY_VALUE(char, converter::do_return_to_python(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(char const*, converter::do_return_to_python(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::string, ::PyString_FromStringAndSize(x.data(),implicit_cast<ssize_t>(x.size())))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(char, converter::do_return_to_python(x), &PyString_Type)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(char const*, converter::do_return_to_python(x), &PyString_Type)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::string, ::PyString_FromStringAndSize(x.data(),implicit_cast<ssize_t>(x.size())), &PyString_Type)
#if defined(Py_USING_UNICODE) && !defined(BOOST_NO_STD_WSTRING)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::wstring, ::PyUnicode_FromWideChar(x.data(),implicit_cast<ssize_t>(x.size())))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::wstring, ::PyUnicode_FromWideChar(x.data(),implicit_cast<ssize_t>(x.size())), &PyString_Type)
# endif
BOOST_PYTHON_TO_PYTHON_BY_VALUE(float, ::PyFloat_FromDouble(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(double, ::PyFloat_FromDouble(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(long double, ::PyFloat_FromDouble(x))
BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(PyObject*, converter::do_return_to_python(x))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::complex<float>, ::PyComplex_FromDoubles(x.real(), x.imag()))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::complex<double>, ::PyComplex_FromDoubles(x.real(), x.imag()))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::complex<long double>, ::PyComplex_FromDoubles(x.real(), x.imag()))
BOOST_PYTHON_TO_PYTHON_BY_VALUE(float, ::PyFloat_FromDouble(x), &PyFloat_Type)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(double, ::PyFloat_FromDouble(x), &PyFloat_Type)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(long double, ::PyFloat_FromDouble(x), &PyFloat_Type)
BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE(PyObject*, converter::do_return_to_python(x), 0)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::complex<float>, ::PyComplex_FromDoubles(x.real(), x.imag()), &PyComplex_Type)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::complex<double>, ::PyComplex_FromDoubles(x.real(), x.imag()), &PyComplex_Type)
BOOST_PYTHON_TO_PYTHON_BY_VALUE(std::complex<long double>, ::PyComplex_FromDoubles(x.real(), x.imag()), &PyComplex_Type)
# undef BOOST_PYTHON_RETURN_TO_PYTHON_BY_VALUE
# undef BOOST_PYTHON_ARG_TO_PYTHON_BY_VALUE

View File

@@ -18,6 +18,9 @@ struct pyobject_traits<PyObject>
// All objects are convertible to PyObject
static bool check(PyObject*) { return true; }
static PyObject* checked_downcast(PyObject* x) { return x; }
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const* get_pytype() { return 0; }
#endif
};
//

View File

@@ -14,7 +14,7 @@ BOOST_PYTHON_DECL PyObject* checked_downcast_impl(PyObject*, PyTypeObject*);
// Used as a base class for specializations which need to provide
// Python type checking capability.
template <class Object, PyTypeObject* pytype>
struct pyobject_type
struct pyobject_type
{
static bool check(PyObject* x)
{
@@ -27,6 +27,9 @@ struct pyobject_type
(checked_downcast_impl)(x, pytype)
);
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const* get_pytype() { return pytype; }
#endif
};
}}} // namespace boost::python::converter

View File

@@ -0,0 +1,132 @@
// Copyright David Abrahams 2002, 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)
#ifndef WRAP_PYTYPE_NM20070606_HPP
# define WRAP_PYTYPE_NM20070606_HPP
# include <boost/python/detail/prefix.hpp>
# include <boost/python/converter/registered.hpp>
# include <boost/python/detail/unwind_type.hpp>
namespace boost { namespace python {
namespace converter
{
template <PyTypeObject const* python_type>
struct wrap_pytype
{
static PyTypeObject const* get_pytype()
{
return python_type;
}
};
typedef PyTypeObject const* (*pytype_function)();
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
namespace detail
{
struct unwind_type_id_helper{
typedef python::type_info result_type;
template <class U>
static result_type execute(U* ){
return python::type_id<U>();
}
};
template <class T>
inline python::type_info unwind_type_id_(boost::type<T>* = 0, mpl::false_ * =0)
{
return boost::python::detail::unwind_type<unwind_type_id_helper, T> ();
}
inline python::type_info unwind_type_id_(boost::type<void>* = 0, mpl::true_* =0)
{
return type_id<void>();
}
template <class T>
inline python::type_info unwind_type_id(boost::type<T>* p= 0)
{
return unwind_type_id_(p, (mpl::bool_<boost::is_void<T>::value >*)0 );
}
}
template <class T>
struct expected_pytype_for_arg
{
static PyTypeObject const *get_pytype()
{
const converter::registration *r=converter::registry::query(
detail::unwind_type_id_((boost::type<T>*)0, (mpl::bool_<boost::is_void<T>::value >*)0 )
);
return r ? r->expected_from_python_type(): 0;
}
};
template <class T>
struct registered_pytype
{
static PyTypeObject const *get_pytype()
{
const converter::registration *r=converter::registry::query(
detail::unwind_type_id_((boost::type<T>*) 0, (mpl::bool_<boost::is_void<T>::value >*)0 )
);
return r ? r->m_class_object: 0;
}
};
template <class T>
struct registered_pytype_direct
{
static PyTypeObject const* get_pytype()
{
return registered<T>::converters.m_class_object;
}
};
template <class T>
struct expected_from_python_type : expected_pytype_for_arg<T>{};
template <class T>
struct expected_from_python_type_direct
{
static PyTypeObject const* get_pytype()
{
return registered<T>::converters.expected_from_python_type();
}
};
template <class T>
struct to_python_target_type
{
static PyTypeObject const *get_pytype()
{
const converter::registration *r=converter::registry::query(
detail::unwind_type_id_((boost::type<T>*)0, (mpl::bool_<boost::is_void<T>::value >*)0 )
);
return r ? r->to_python_target_type(): 0;
}
};
template <class T>
struct to_python_target_type_direct
{
static PyTypeObject const *get_pytype()
{
return registered<T>::converters.to_python_target_type();
}
};
#endif
}}} // namespace boost::python
#endif // WRAP_PYTYPE_NM20070606_HPP

View File

@@ -27,6 +27,7 @@ struct rvalue_from_python_chain
{
convertible_function convertible;
constructor_function construct;
PyTypeObject const* (*expected_pytype)();
rvalue_from_python_chain* next;
};
@@ -34,6 +35,7 @@ struct BOOST_PYTHON_DECL registration
{
public: // member functions
explicit registration(type_info target, bool is_shared_ptr = false);
~registration();
// Convert the appropriately-typed data to Python
PyObject* to_python(void const volatile*) const;
@@ -42,6 +44,11 @@ struct BOOST_PYTHON_DECL registration
// exception if no class has been registered.
PyTypeObject* get_class_object() const;
// Return common denominator of the python class objects,
// convertable to target. Inspects the m_class_object and the value_chains.
PyTypeObject const* expected_from_python_type() const;
PyTypeObject const* to_python_target_type() const;
public: // data members. So sue me.
const python::type_info target_type;
@@ -56,6 +63,8 @@ struct BOOST_PYTHON_DECL registration
// The unique to_python converter for the associated C++ type.
to_python_function_t m_to_python;
PyTypeObject const* (*m_to_python_target_type)();
// True iff this type is a shared_ptr. Needed for special rvalue
// from_python handling.
@@ -76,6 +85,7 @@ inline registration::registration(type_info target_type, bool is_shared_ptr)
, rvalue_chain(0)
, m_class_object(0)
, m_to_python(0)
, m_to_python_target_type(0)
, is_shared_ptr(is_shared_ptr)
{}

View File

@@ -27,16 +27,17 @@ namespace registry
// Return a pointer to the corresponding registration, if one exists
BOOST_PYTHON_DECL registration const* query(type_info);
BOOST_PYTHON_DECL void insert(to_python_function_t, type_info);
BOOST_PYTHON_DECL void insert(to_python_function_t, type_info, PyTypeObject const* (*to_python_target_type)() = 0);
// Insert an lvalue from_python converter
BOOST_PYTHON_DECL void insert(void* (*convert)(PyObject*), type_info);
BOOST_PYTHON_DECL void insert(void* (*convert)(PyObject*), type_info, PyTypeObject const* (*expected_pytype)() = 0);
// Insert an rvalue from_python converter
BOOST_PYTHON_DECL void insert(
convertible_function
, constructor_function
, type_info
, PyTypeObject const* (*expected_pytype)() = 0
);
// Insert an rvalue from_python converter at the tail of the
@@ -45,6 +46,7 @@ namespace registry
convertible_function
, constructor_function
, type_info
, PyTypeObject const* (*expected_pytype)() = 0
);
}

View File

@@ -10,6 +10,9 @@
# include <boost/python/converter/from_python.hpp>
# include <boost/python/converter/rvalue_from_python_data.hpp>
# include <boost/python/converter/registered.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/shared_ptr.hpp>
namespace boost { namespace python { namespace converter {
@@ -19,7 +22,11 @@ struct shared_ptr_from_python
{
shared_ptr_from_python()
{
converter::registry::insert(&convertible, &construct, type_id<shared_ptr<T> >());
converter::registry::insert(&convertible, &construct, type_id<shared_ptr<T> >()
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
, &converter::expected_from_python_type_direct<T>::get_pytype
#endif
);
}
private:

View File

@@ -13,6 +13,7 @@
# include <boost/type_traits/is_pointer.hpp>
# include <boost/type_traits/is_reference.hpp>
# include <boost/mpl/or.hpp>
# include <boost/mpl/front.hpp>
namespace boost { namespace python {
@@ -49,6 +50,12 @@ struct default_call_policies
typedef default_result_converter result_converter;
typedef PyObject* argument_package;
template <class Sig>
struct extract_return_type : mpl::front<Sig>
{
};
};
struct default_result_converter

View File

@@ -11,12 +11,15 @@
# include <boost/python/type_id.hpp>
# include <boost/python/handle.hpp>
# include <boost/detail/indirect_traits.hpp>
# include <boost/python/detail/invoke.hpp>
# include <boost/python/detail/signature.hpp>
# include <boost/python/detail/preprocessor.hpp>
# include <boost/python/arg_from_python.hpp>
# include <boost/python/converter/context_result_converter.hpp>
# include <boost/python/converter/builtin_converters.hpp>
# include <boost/preprocessor/iterate.hpp>
# include <boost/preprocessor/cat.hpp>
@@ -89,6 +92,27 @@ inline ResultConverter create_result_converter(
{
return ResultConverter();
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
template <class ResultConverter>
struct converter_target_type
{
static PyTypeObject const *get_pytype()
{
return create_result_converter((PyObject*)0, (ResultConverter *)0, (ResultConverter *)0).get_pytype();
}
};
template < >
struct converter_target_type <void_result_to_python >
{
static PyTypeObject const *get_pytype()
{
return 0;
}
};
#endif
template <unsigned> struct caller_arity;
@@ -203,11 +227,26 @@ struct caller_arity<N>
static unsigned min_arity() { return N; }
static signature_element const* signature()
static py_func_sig_info signature()
{
return detail::signature<Sig>::elements();
const signature_element * sig = detail::signature<Sig>::elements();
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
typedef BOOST_DEDUCED_TYPENAME Policies::template extract_return_type<Sig>::type rtype;
typedef typename select_result_converter<Policies, rtype>::type result_converter;
static const signature_element ret = {
(boost::is_void<rtype>::value ? "void" : type_id<rtype>().name())
, &detail::converter_target_type<result_converter>::get_pytype
, boost::detail::indirect_traits::is_reference_to_non_const<rtype>::value
};
py_func_sig_info res = {sig, &ret };
#else
py_func_sig_info res = {sig, sig };
#endif
return res;
}
private:
compressed_pair<F,Policies> m_data;
};

View File

@@ -134,4 +134,8 @@
#include <boost/config/auto_link.hpp>
#endif // auto-linking disabled
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
#define BOOST_PYTHON_SUPPORTS_PY_SIGNATURES // enables smooth transition
#endif
#endif // CONFIG_DWA052200_H_

View File

@@ -155,7 +155,7 @@ namespace detail
, T3 const&
, T4 const&
, default_call_policies
, keywords<0>
, detail::keywords<0>
, char const*
, void(not_specified::*)() // A function pointer type which is never an
// appropriate default implementation

View File

@@ -168,7 +168,7 @@ namespace detail
char const* doc)
{
// define the NTH stub function of stubs
define_stub_function<N>::define(name, stubs, kw, policies, name_space, 0);
define_stub_function<N>::define(name, stubs, kw, policies, name_space, doc);
if (kw.second > kw.first)
--kw.second;

View File

@@ -248,7 +248,7 @@ namespace detail
BOOST_PYTHON_GEN_MEM_FUNCTION( \
fname, void_return_type, n_args, n_dflts, ;) \
\
BOOST_PYTHON_OVERLOAD_CONSTRUCTORS(fstubs_name, n_args, n_dflts) \
BOOST_PYTHON_OVERLOAD_CONSTRUCTORS(fstubs_name, n_args + 1, n_dflts) \
};
# else // !defined(BOOST_NO_VOID_RETURNS)
@@ -273,7 +273,7 @@ namespace detail
fname, non_void_return_type, n_args, n_dflts, return) \
\
typedef non_void_return_type void_return_type; \
BOOST_PYTHON_OVERLOAD_CONSTRUCTORS(fstubs_name, n_args, n_dflts) \
BOOST_PYTHON_OVERLOAD_CONSTRUCTORS(fstubs_name, n_args + 1, n_dflts) \
};
# endif // !defined(BOOST_NO_VOID_RETURNS)

View File

@@ -57,6 +57,9 @@ object make_keyword_range_constructor(
, Holder* = 0
, ArgList* = 0, Arity* = 0)
{
#if !defined( BOOST_PYTHON_NO_PY_SIGNATURES) && defined( BOOST_PYTHON_PY_SYGNATURES_PROPER_INIT_SELF_TYPE)
python_class<BOOST_DEDUCED_TYPENAME Holder::value_type>::register_();
#endif
return detail::make_keyword_range_function(
objects::make_holder<Arity::value>
::template apply<Holder,ArgList>::execute

View File

@@ -47,7 +47,8 @@ enum operator_id
op_ixor,
op_ior,
op_complex,
op_nonzero
op_nonzero,
op_repr
};
}}} // namespace boost::python::detail

View File

@@ -0,0 +1,37 @@
// 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)
#ifndef BOOST_PYTHON_OBJECT_PYTHON_TYPE_H
#define BOOST_PYTHON_OBJECT_PYTHON_TYPE_H
#include <boost/python/converter/registered.hpp>
namespace boost {namespace python {namespace detail{
template <class T> struct python_class : PyObject
{
typedef python_class<T> this_type;
typedef T type;
static void *converter (PyObject *p){
return p;
}
static void register_()
{
static bool first_time = true;
if ( !first_time ) return;
first_time = false;
converter::registry::insert(&converter, boost::python::type_id<this_type>(), &converter::registered_pytype_direct<T>::get_pytype);
}
};
}}} //namespace boost :: python :: detail
#endif //BOOST_PYTHON_OBJECT_PYTHON_TYPE_H

View File

@@ -12,6 +12,7 @@
# include <boost/python/detail/preprocessor.hpp>
# include <boost/python/detail/indirect_traits.hpp>
# include <boost/python/converter/pytype_function.hpp>
# include <boost/preprocessor/iterate.hpp>
# include <boost/preprocessor/iteration/local.hpp>
@@ -24,9 +25,16 @@ namespace boost { namespace python { namespace detail {
struct signature_element
{
char const* basename;
converter::pytype_function pytype_f;
bool lvalue;
};
struct py_func_sig_info
{
signature_element const *signature;
signature_element const *ret;
};
template <unsigned> struct signature_arity;
# define BOOST_PP_ITERATION_PARAMS_1 \
@@ -68,15 +76,25 @@ struct signature_arity<N>
{
static signature_element const result[N+2] = {
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# define BOOST_PP_LOCAL_MACRO(i) \
{ \
type_id<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>().name() \
, indirect_traits::is_reference_to_non_const<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>::value \
},
{ \
type_id<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>().name() \
, &converter::expected_pytype_for_arg<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>::get_pytype \
, indirect_traits::is_reference_to_non_const<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>::value \
},
#else
# define BOOST_PP_LOCAL_MACRO(i) \
{ \
type_id<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>().name() \
, 0 \
, indirect_traits::is_reference_to_non_const<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>::value \
},
#endif
# define BOOST_PP_LOCAL_LIMITS (0, N)
# include BOOST_PP_LOCAL_ITERATE()
{0,0}
{0,0,0}
};
return result;
}

View File

@@ -0,0 +1,170 @@
// Copyright David Abrahams 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)
#ifndef UNWIND_TYPE_DWA200222_HPP
# define UNWIND_TYPE_DWA200222_HPP
# include <boost/python/detail/cv_category.hpp>
# include <boost/python/detail/indirect_traits.hpp>
# include <boost/type_traits/object_traits.hpp>
namespace boost { namespace python { namespace detail {
#ifndef _MSC_VER //if forward declared, msvc6.5 does not recognize them as inline
// forward declaration, required (at least) by Tru64 cxx V6.5-042
template <class Generator, class U>
inline typename Generator::result_type
unwind_type(U const& p, Generator* = 0);
// forward declaration, required (at least) by Tru64 cxx V6.5-042
template <class Generator, class U>
inline typename Generator::result_type
unwind_type(boost::type<U>*p = 0, Generator* = 0);
#endif
template <class Generator, class U>
inline typename Generator::result_type
unwind_type_cv(U* p, cv_unqualified, Generator* = 0)
{
return Generator::execute(p);
}
template <class Generator, class U>
inline typename Generator::result_type
unwind_type_cv(U const* p, const_, Generator* = 0)
{
return unwind_type(const_cast<U*>(p), (Generator*)0);
}
template <class Generator, class U>
inline typename Generator::result_type
unwind_type_cv(U volatile* p, volatile_, Generator* = 0)
{
return unwind_type(const_cast<U*>(p), (Generator*)0);
}
template <class Generator, class U>
inline typename Generator::result_type
unwind_type_cv(U const volatile* p, const_volatile_, Generator* = 0)
{
return unwind_type(const_cast<U*>(p), (Generator*)0);
}
template <class Generator, class U>
inline typename Generator::result_type
unwind_ptr_type(U* p, Generator* = 0)
{
typedef typename cv_category<U>::type tag;
return unwind_type_cv<Generator>(p, tag());
}
template <bool is_ptr>
struct unwind_helper
{
template <class Generator, class U>
static typename Generator::result_type
execute(U p, Generator* = 0)
{
return unwind_ptr_type(p, (Generator*)0);
}
};
template <>
struct unwind_helper<false>
{
template <class Generator, class U>
static typename Generator::result_type
execute(U& p, Generator* = 0)
{
return unwind_ptr_type(&p, (Generator*)0);
}
};
template <class Generator, class U>
inline typename Generator::result_type
#ifndef _MSC_VER
unwind_type(U const& p, Generator*)
#else
unwind_type(U const& p, Generator* = 0)
#endif
{
return unwind_helper<is_pointer<U>::value>::execute(p, (Generator*)0);
}
enum { direct_ = 0, pointer_ = 1, reference_ = 2, reference_to_pointer_ = 3 };
template <int indirection> struct unwind_helper2;
template <>
struct unwind_helper2<direct_>
{
template <class Generator, class U>
static typename Generator::result_type
execute(U(*)(), Generator* = 0)
{
return unwind_ptr_type((U*)0, (Generator*)0);
}
};
template <>
struct unwind_helper2<pointer_>
{
template <class Generator, class U>
static typename Generator::result_type
execute(U*(*)(), Generator* = 0)
{
return unwind_ptr_type((U*)0, (Generator*)0);
}
};
template <>
struct unwind_helper2<reference_>
{
template <class Generator, class U>
static typename Generator::result_type
execute(U&(*)(), Generator* = 0)
{
return unwind_ptr_type((U*)0, (Generator*)0);
}
};
template <>
struct unwind_helper2<reference_to_pointer_>
{
template <class Generator, class U>
static typename Generator::result_type
execute(U&(*)(), Generator* = 0)
{
return unwind_ptr_type(U(0), (Generator*)0);
}
};
// Call this one with both template parameters explicitly specified
// and no function arguments:
//
// return unwind_type<my_generator,T>();
//
// Doesn't work if T is an array type; we could handle that case, but
// why bother?
template <class Generator, class U>
inline typename Generator::result_type
#ifndef _MSC_VER
unwind_type(boost::type<U>*p, Generator*)
#else
unwind_type(boost::type<U>*p =0, Generator* =0)
#endif
{
BOOST_STATIC_CONSTANT(int, indirection
= (boost::is_pointer<U>::value ? pointer_ : 0)
+ (indirect_traits::is_reference_to_pointer<U>::value
? reference_to_pointer_
: boost::is_reference<U>::value
? reference_
: 0));
return unwind_helper2<indirection>::execute((U(*)())0,(Generator*)0);
}
}}} // namespace boost::python::detail
#endif // UNWIND_TYPE_DWA200222_HPP

View File

@@ -17,23 +17,38 @@ class BOOST_PYTHON_DECL docstring_options : boost::noncopyable
docstring_options(bool show_all=true)
{
previous_show_user_defined_ = show_user_defined_;
previous_show_signatures_ = show_signatures_;
previous_show_py_signatures_ = show_py_signatures_;
previous_show_cpp_signatures_ = show_cpp_signatures_;
show_user_defined_ = show_all;
show_signatures_ = show_all;
show_cpp_signatures_ = show_all;
show_py_signatures_ = show_all;
}
docstring_options(bool show_user_defined, bool show_signatures)
{
previous_show_user_defined_ = show_user_defined_;
previous_show_signatures_ = show_signatures_;
previous_show_cpp_signatures_ = show_cpp_signatures_;
previous_show_py_signatures_ = show_py_signatures_;
show_user_defined_ = show_user_defined;
show_signatures_ = show_signatures;
show_cpp_signatures_ = show_signatures;
show_py_signatures_ = show_signatures;
}
docstring_options(bool show_user_defined, bool show_py_signatures, bool show_cpp_signatures)
{
previous_show_user_defined_ = show_user_defined_;
previous_show_cpp_signatures_ = show_cpp_signatures_;
previous_show_py_signatures_ = show_py_signatures_;
show_user_defined_ = show_user_defined;
show_cpp_signatures_ = show_cpp_signatures;
show_py_signatures_ = show_py_signatures;
}
~docstring_options()
{
show_user_defined_ = previous_show_user_defined_;
show_signatures_ = previous_show_signatures_;
show_cpp_signatures_ = previous_show_cpp_signatures_;
show_py_signatures_ = previous_show_py_signatures_;
}
void
@@ -43,32 +58,68 @@ class BOOST_PYTHON_DECL docstring_options : boost::noncopyable
enable_user_defined() { show_user_defined_ = true; }
void
disable_signatures() { show_signatures_ = false; }
disable_py_signatures()
{
show_py_signatures_ = false;
}
void
enable_signatures() { show_signatures_ = true; }
enable_py_signatures()
{
show_py_signatures_ = true;
}
void
disable_cpp_signatures()
{
show_cpp_signatures_ = false;
}
void
enable_cpp_signatures()
{
show_cpp_signatures_ = true;
}
void
disable_signatures()
{
show_cpp_signatures_ = false;
show_py_signatures_ = false;
}
void
enable_signatures()
{
show_cpp_signatures_ = true;
show_py_signatures_ = true;
}
void
disable_all()
{
show_user_defined_ = false;
show_signatures_ = false;
show_cpp_signatures_ = false;
show_py_signatures_ = false;
}
void
enable_all()
{
show_user_defined_ = true;
show_signatures_ = true;
show_cpp_signatures_ = true;
show_py_signatures_ = true;
}
friend struct objects::function;
private:
static volatile bool show_user_defined_;
static volatile bool show_signatures_;
static volatile bool show_cpp_signatures_;
static volatile bool show_py_signatures_;
bool previous_show_user_defined_;
bool previous_show_signatures_;
bool previous_show_cpp_signatures_;
bool previous_show_py_signatures_;
};
}} // namespace boost::python

View File

@@ -19,7 +19,7 @@ struct enum_ : public objects::enum_base
typedef objects::enum_base base;
// Declare a new enumeration type in the current scope()
enum_(char const* name);
enum_(char const* name, char const* doc = 0);
// Add a new enumeration value with the given name and value.
inline enum_<T>& value(char const* name, T);
@@ -34,13 +34,15 @@ struct enum_ : public objects::enum_base
};
template <class T>
inline enum_<T>::enum_(char const* name)
inline enum_<T>::enum_(char const* name, char const* doc )
: base(
name
, &enum_<T>::to_python
, &enum_<T>::convertible_from_python
, &enum_<T>::construct
, type_id<T>())
, type_id<T>()
, doc
)
{
}

View File

@@ -13,18 +13,25 @@ namespace boost
namespace python
{
// Evaluate python expression from str.
// global and local are the global and local scopes respectively,
// used during evaluation.
object
BOOST_PYTHON_DECL
eval(str string, object global = object(), object local = object());
// Execute python source code from str.
// global and local are the global and local scopes respectively,
// used during execution.
object
BOOST_PYTHON_DECL
BOOST_PYTHON_DECL
exec(str string, object global = object(), object local = object());
// Execute python source code from file filename.
// global and local are the global and local scopes respectively,
// used during execution.
object
BOOST_PYTHON_DECL
BOOST_PYTHON_DECL
exec_file(str filename, object global = object(), object local = object());
}

View File

@@ -9,6 +9,9 @@
# include <boost/type.hpp>
# include <boost/python/converter/implicit.hpp>
# include <boost/python/converter/registry.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/python/type_id.hpp>
namespace boost { namespace python {
@@ -21,7 +24,11 @@ void implicitly_convertible(boost::type<Source>* = 0, boost::type<Target>* = 0)
converter::registry::push_back(
&functions::convertible
, &functions::construct
, type_id<Target>());
, type_id<Target>()
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
, &converter::expected_from_python_type_direct<Source>::get_pytype
#endif
);
}
}} // namespace boost::python

View File

@@ -245,7 +245,7 @@ class init : public init_base<init<BOOST_PYTHON_OVERLOAD_ARGS> >
: base(doc_, kw.range())
{
typedef typename detail::error::more_keywords_than_init_arguments<
N, n_arguments::value
N, n_arguments::value + 1
>::too_many_keywords assertion;
}
@@ -254,7 +254,7 @@ class init : public init_base<init<BOOST_PYTHON_OVERLOAD_ARGS> >
: base(doc_, kw.range())
{
typedef typename detail::error::more_keywords_than_init_arguments<
N, n_arguments::value
N, n_arguments::value + 1
>::too_many_keywords assertion;
}
@@ -363,7 +363,7 @@ namespace detail
, char const* doc
, detail::keyword_range keywords)
{
detail::def_init_aux(cl, args, NArgs(), policies, 0, keywords);
detail::def_init_aux(cl, args, NArgs(), policies, doc, keywords);
if (keywords.second > keywords.first)
--keywords.second;

View File

@@ -6,6 +6,9 @@
# define LVALUE_FROM_PYTYPE_DWA2002130_HPP
# include <boost/python/detail/prefix.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/python/type_id.hpp>
# include <boost/python/converter/registry.hpp>
@@ -81,12 +84,17 @@ struct extract_identity
// Extractor's static execute function from Python objects whose type
// object is python_type.
template <class Extractor, PyTypeObject const* python_type>
struct lvalue_from_pytype
struct lvalue_from_pytype
{
lvalue_from_pytype()
{
converter::registry::insert(
&extract, detail::extractor_type_id(&Extractor::execute));
converter::registry::insert
( &extract
, detail::extractor_type_id(&Extractor::execute)
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
, &get_pytype
#endif
);
}
private:
static void* extract(PyObject* op)
@@ -98,6 +106,9 @@ struct lvalue_from_pytype
: 0
;
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const*get_pytype() { return python_type; }
#endif
};
}} // namespace boost::python

View File

@@ -23,6 +23,7 @@
# include <boost/mpl/int.hpp>
# include <boost/mpl/push_front.hpp>
# include <boost/mpl/pop_front.hpp>
# include <boost/mpl/assert.hpp>
namespace boost { namespace python {
@@ -103,13 +104,23 @@ namespace detail
// If the BasePolicy_ supplied a result converter it would be
// ignored; issue an error if it's not the default.
BOOST_STATIC_ASSERT((
is_same<
#if defined _MSC_VER && _MSC_VER < 1300
typedef is_same<
typename BasePolicy_::result_converter
, default_result_converter
>::value
));
> same_result_converter;
//see above for explanation
BOOST_STATIC_ASSERT(same_result_converter::value) ;
#else
BOOST_MPL_ASSERT_MSG(
(is_same<
typename BasePolicy_::result_converter
, default_result_converter
>::value)
, MAKE_CONSTRUCTOR_SUPPLIES_ITS_OWN_RESULT_CONVERTER_THAT_WOULD_OVERRIDE_YOURS
, (typename BasePolicy_::result_converter)
);
#endif
typedef constructor_result_converter result_converter;
typedef offset_args<typename BasePolicy_::argument_package, mpl::int_<1> > argument_package;
};

View File

@@ -26,23 +26,7 @@ extern "C" __declspec(dllexport) void init##name() \
} \
void init_module_##name()
# elif defined(_AIX) && !defined(BOOST_PYTHON_STATIC_MODULE)
# include <boost/python/detail/aix_init_module.hpp>
# define BOOST_PYTHON_MODULE_INIT(name) \
void init_module_##name(); \
extern "C" \
{ \
extern PyObject* _PyImport_LoadDynamicModule(char*, char*, FILE *); \
void init##name() \
{ \
boost::python::detail::aix_init_module( \
_PyImport_LoadDynamicModule, #name, &init_module_##name); \
} \
} \
void init_module_##name()
# elif BOOST_PYTHON_USE_GCC_SYMBOL_VISIBILITY
# elif BOOST_PYTHON_USE_GCC_SYMBOL_VISIBILITY
# define BOOST_PYTHON_MODULE_INIT(name) \
void init_module_##name(); \
@@ -52,7 +36,7 @@ extern "C" __attribute__ ((visibility("default"))) void init##name() \
} \
void init_module_##name()
# else
# else
# define BOOST_PYTHON_MODULE_INIT(name) \
void init_module_##name(); \

View File

@@ -238,6 +238,14 @@ struct class_metadata
//
inline static void maybe_register_pointer_to_python(void*,void*,void*) {}
#ifndef BOOST_PYTHON_NO_PY_SYGNATURES
inline static void maybe_register_pointer_to_python(void*,void*,mpl::true_*)
{
objects::copy_class_object(python::type_id<T>(), python::type_id<back_reference<T const &> >());
objects::copy_class_object(python::type_id<T>(), python::type_id<back_reference<T &> >());
}
#endif
template <class T2>
inline static void maybe_register_pointer_to_python(T2*, mpl::false_*, mpl::false_*)
{
@@ -247,6 +255,10 @@ struct class_metadata
, make_ptr_instance<T2, pointer_holder<held_type, T2> >
>()
);
#ifndef BOOST_PYTHON_NO_PY_SYGNATURES
// explicit qualification of type_id makes msvc6 happy
objects::copy_class_object(python::type_id<T2>(), python::type_id<held_type>());
#endif
}
//
// Support for registering to-python converters
@@ -258,6 +270,10 @@ struct class_metadata
inline static void maybe_register_class_to_python(T2*, mpl::false_)
{
python::detail::force_instantiate(class_cref_wrapper<T2, make_instance<T2, holder> >());
#ifndef BOOST_PYTHON_NO_PY_SYGNATURES
// explicit qualification of type_id makes msvc6 happy
objects::copy_class_object(python::type_id<T2>(), python::type_id<held_type>());
#endif
}
//

View File

@@ -6,6 +6,9 @@
# define CLASS_WRAPPER_DWA20011221_HPP
# include <boost/python/to_python_converter.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/ref.hpp>
namespace boost { namespace python { namespace objects {
@@ -19,22 +22,28 @@ namespace boost { namespace python { namespace objects {
template <class Src, class MakeInstance>
struct class_cref_wrapper
: to_python_converter<Src,class_cref_wrapper<Src,MakeInstance> >
: to_python_converter<Src,class_cref_wrapper<Src,MakeInstance> ,true>
{
static PyObject* convert(Src const& x)
{
return MakeInstance::execute(boost::ref(x));
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const *get_pytype() { return converter::registered_pytype_direct<Src>::get_pytype(); }
#endif
};
template <class Src, class MakeInstance>
struct class_value_wrapper
: to_python_converter<Src,class_value_wrapper<Src,MakeInstance> >
: to_python_converter<Src,class_value_wrapper<Src,MakeInstance> ,true>
{
static PyObject* convert(Src x)
{
return MakeInstance::execute(x);
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const *get_pytype() { return MakeInstance::get_pytype(); }
#endif
};
}}} // namespace boost::python::objects

View File

@@ -21,7 +21,9 @@ struct BOOST_PYTHON_DECL enum_base : python::api::object
, converter::to_python_function_t
, converter::convertible_function
, converter::constructor_function
, type_info);
, type_info
, const char *doc = 0
);
void add_value(char const* name, long value);
void export_values();

View File

@@ -14,6 +14,7 @@
namespace boost { namespace python { namespace objects {
struct BOOST_PYTHON_DECL function : PyObject
{
function(
@@ -53,6 +54,7 @@ struct BOOST_PYTHON_DECL function : PyObject
object m_doc;
object m_arg_names;
unsigned m_nkeyword_values;
friend class function_doc_signature_generator;
};
//

View File

@@ -0,0 +1,36 @@
// 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)
#ifndef FUNCTION_SIGNATURE_20070531_HPP
# define FUNCTION_SIGNATURE_20070531_HPP
#include <boost/python/object/function.hpp>
#include <boost/python/converter/registrations.hpp>
#include <boost/python/str.hpp>
#include <boost/python/tuple.hpp>
#include <boost/python/detail/signature.hpp>
#include <vector>
namespace boost { namespace python { namespace objects {
class function_doc_signature_generator{
static const char * py_type_str(const python::detail::signature_element &s);
static bool arity_cmp( function const *f1, function const *f2 );
static bool are_seq_overloads( function const *f1, function const *f2 , bool check_docs);
static std::vector<function const*> flatten(function const *f);
static std::vector<function const*> split_seq_overloads( const std::vector<function const *> &funcs, bool split_on_doc_change);
static str raw_function_pretty_signature(function const *f, size_t n_overloads, bool cpp_types = false);
static str parameter_string(py_function const &f, size_t n, object arg_names, bool cpp_types);
static str pretty_signature(function const *f, size_t n_overloads, bool cpp_types = false);
public:
static list function_doc_signatures( function const * f);
};
}}}//end of namespace boost::python::objects
#endif //FUNCTION_SIGNATURE_20070531_HPP

View File

@@ -11,6 +11,10 @@
# include <boost/python/detail/prefix.hpp>
# include <boost/python/object/instance.hpp>
# include <boost/python/converter/registry.hpp>
#if !defined( BOOST_PYTHON_NO_PY_SIGNATURES) && defined( BOOST_PYTHON_PY_SYGNATURES_PROPER_INIT_SELF_TYPE)
# include <boost/python/detail/python_type.hpp>
#endif
# include <boost/python/object/forward.hpp>
# include <boost/python/detail/preprocessor.hpp>
@@ -74,7 +78,11 @@ struct make_holder<N>
# endif
static void execute(
PyObject* p
#if !defined( BOOST_PYTHON_NO_PY_SIGNATURES) && defined( BOOST_PYTHON_PY_SYGNATURES_PROPER_INIT_SELF_TYPE)
boost::python::detail::python_class<BOOST_DEDUCED_TYPENAME Holder::value_type> *p
#else
PyObject *p
#endif
BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, t, a))
{
typedef instance<Holder> instance_t;

View File

@@ -29,7 +29,12 @@ struct make_ptr_instance
{
return get_class_object_impl(get_pointer(x));
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static inline PyTypeObject const* get_pytype()
{
return converter::registered<T>::converters.get_class_object();
}
#endif
private:
template <class U>
static inline PyTypeObject* get_class_object_impl(U const volatile* p)

View File

@@ -23,7 +23,7 @@ struct BOOST_PYTHON_DECL py_function_impl_base
virtual PyObject* operator()(PyObject*, PyObject*) = 0;
virtual unsigned min_arity() const = 0;
virtual unsigned max_arity() const;
virtual python::detail::signature_element const* signature() const = 0;
virtual python::detail::py_func_sig_info signature() const = 0;
};
template <class Caller>
@@ -43,7 +43,7 @@ struct caller_py_function_impl : py_function_impl_base
return m_caller.min_arity();
}
virtual python::detail::signature_element const* signature() const
virtual python::detail::py_func_sig_info signature() const
{
return m_caller.signature();
}
@@ -69,9 +69,11 @@ struct signature_py_function_impl : py_function_impl_base
return mpl::size<Sig>::value - 1;
}
virtual python::detail::signature_element const* signature() const
virtual python::detail::py_func_sig_info signature() const
{
return python::detail::signature<Sig>::elements();
python::detail::signature_element const* sig = python::detail::signature<Sig>::elements();
python::detail::py_func_sig_info res = {sig, sig};
return res;
}
private:
@@ -102,9 +104,11 @@ struct full_py_function_impl : py_function_impl_base
return m_max_arity;
}
virtual python::detail::signature_element const* signature() const
virtual python::detail::py_func_sig_info signature() const
{
return python::detail::signature<Sig>::elements();
python::detail::signature_element const* sig = python::detail::signature<Sig>::elements();
python::detail::py_func_sig_info res = {sig, sig};
return res;
}
private:
@@ -151,7 +155,12 @@ struct py_function
python::detail::signature_element const* signature() const
{
return m_impl->signature();
return m_impl->signature().signature;
}
python::detail::signature_element const& get_return_type() const
{
return *m_impl->signature().ret;
}
private:

View File

@@ -470,6 +470,9 @@ namespace converter
{
return python::detail::new_non_null_reference(x);
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const *get_pytype() {return 0;}
#endif
};
}

View File

@@ -1,4 +1,4 @@
// Copyright Gottfried Ganßauge 2003..2006
// Copyright Gottfried Ganßauge 2003..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)
@@ -93,8 +93,13 @@ private:
if ((existing == 0) || (existing->m_to_python == 0))
{
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
converter::registry::insert(&extract, type_id<Pointee>(), &get_pytype);
converter::registry::insert(&wrap, type_id<Pointee*>(), &get_pytype);
#else
converter::registry::insert(&extract, type_id<Pointee>());
converter::registry::insert(&wrap, type_id<Pointee*>());
#endif
}
}
@@ -105,6 +110,9 @@ private:
};
static PyTypeObject type_object;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
static PyTypeObject const *get_pytype(){return &type_object; }
#endif
};
template <class Pointee>

View File

@@ -347,6 +347,7 @@ BOOST_PYTHON_UNARY_OPERATOR(long, PyLong_FromLong, long_)
BOOST_PYTHON_UNARY_OPERATOR(float, double, float_)
BOOST_PYTHON_UNARY_OPERATOR(complex, std::complex<double>, complex_)
BOOST_PYTHON_UNARY_OPERATOR(str, lexical_cast<std::string>, str)
BOOST_PYTHON_UNARY_OPERATOR(repr, lexical_cast<std::string>, repr)
# undef BOOST_PYTHON_UNARY_OPERATOR
}} // namespace boost::python
@@ -358,6 +359,7 @@ using boost::python::self_ns::long_;
using boost::python::self_ns::float_;
using boost::python::self_ns::complex_;
using boost::python::self_ns::str;
using boost::python::self_ns::repr;
using boost::python::self_ns::pow;
# endif

View File

@@ -8,10 +8,15 @@
# include <boost/python/detail/none.hpp>
# include <boost/python/detail/value_arg.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/type_traits/add_reference.hpp>
# include <boost/type_traits/add_const.hpp>
# include <boost/mpl/int.hpp>
# include <boost/mpl/at.hpp>
# include <boost/static_assert.hpp>
# include <boost/python/refcount.hpp>
@@ -44,6 +49,9 @@ namespace detail
{
return none();
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
PyTypeObject const *get_pytype() const { return converter::expected_pytype_for_arg<T>::get_pytype() ; }
#endif
};
};
};
@@ -82,6 +90,12 @@ struct return_arg : Base
Py_DECREF(result);
return incref( detail::get(mpl::int_<arg_pos-1>(),args) );
}
template <class Sig>
struct extract_return_type : mpl::at_c<Sig, arg_pos>
{
};
};
template <

View File

@@ -17,73 +17,73 @@
# include <boost/type_traits/is_same.hpp>
namespace boost { namespace python {
// indexing_suite class. This class is the facade class for
// the management of C++ containers intended to be integrated
// to Python. The objective is make a C++ container look and
// feel and behave exactly as we'd expect a Python container.
// By default indexed elements are returned by proxy. This can be
// disabled by supplying *true* in the NoProxy template parameter.
//
//
// Derived classes provide the hooks needed by the indexing_suite
// to do its job:
//
// static data_type&
// static data_type&
// get_item(Container& container, index_type i);
//
// static object
// static object
// get_slice(Container& container, index_type from, index_type to);
//
// static void
// static void
// set_item(Container& container, index_type i, data_type const& v);
//
// static void
// static void
// set_slice(
// Container& container, index_type from,
// Container& container, index_type from,
// index_type to, data_type const& v
// );
//
// template <class Iter>
// static void
// set_slice(Container& container, index_type from,
// static void
// set_slice(Container& container, index_type from,
// index_type to, Iter first, Iter last
// );
//
// static void
// static void
// delete_item(Container& container, index_type i);
//
// static void
//
// static void
// delete_slice(Container& container, index_type from, index_type to);
//
//
// static size_t
// size(Container& container);
//
// template <class T>
// static bool
// contains(Container& container, T const& val);
//
//
// static index_type
// convert_index(Container& container, PyObject* i);
//
//
// static index_type
// adjust_index(index_type current, index_type from,
// adjust_index(index_type current, index_type from,
// index_type to, size_type len
// );
//
// Most of these policies are self explanatory. convert_index and
// adjust_index, however, deserves some explanation.
// Most of these policies are self explanatory. convert_index and
// adjust_index, however, deserves some explanation.
//
// convert_index converts an Python index into a C++ index that the
// container can handle. For instance, negative indexes in Python, by
// convention, indexes from the right (e.g. C[-1] indexes the rightmost
// element in C). convert_index should handle the necessary conversion
// convert_index converts an Python index into a C++ index that the
// container can handle. For instance, negative indexes in Python, by
// convention, indexes from the right (e.g. C[-1] indexes the rightmost
// element in C). convert_index should handle the necessary conversion
// for the C++ container (e.g. convert -1 to C.size()-1). convert_index
// should also be able to convert the type of the index (A dynamic Python
// type) to the actual type that the C++ container expects.
//
// When a container expands or contracts, held indexes to its elements
// must be adjusted to follow the movement of data. For instance, if
// we erase 3 elements, starting from index 0 from a 5 element vector,
// we erase 3 elements, starting from index 0 from a 5 element vector,
// what used to be at index 4 will now be at index 1:
//
// [a][b][c][d][e] ---> [d][e]
@@ -104,7 +104,7 @@ namespace boost { namespace python {
, class Index = typename Container::size_type
, class Key = typename Container::value_type
>
class indexing_suite
class indexing_suite
: public def_visitor<
indexing_suite<
Container
@@ -117,7 +117,7 @@ namespace boost { namespace python {
> >
{
private:
typedef mpl::or_<
mpl::bool_<NoProxy>
, mpl::not_<is_class<Data> >
@@ -127,10 +127,10 @@ namespace boost { namespace python {
, is_same<Data, std::complex<double> >
, is_same<Data, std::complex<long double> > >::type>
no_proxy;
typedef detail::container_element<Container, Index, DerivedPolicies>
container_element_t;
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
struct return_policy : return_internal_reference<> {};
#else
@@ -142,7 +142,7 @@ namespace boost { namespace python {
, iterator<Container>
, iterator<Container, return_policy> >::type
def_iterator;
typedef typename mpl::if_<
no_proxy
, detail::no_proxy_helper<
@@ -172,15 +172,15 @@ namespace boost { namespace python {
, Data
, Index> >::type
slice_handler;
public:
template <class Class>
void visit(Class& cl) const
{
// Hook into the class_ generic visitation .def function
proxy_handler::register_container_element();
cl
.def("__len__", base_size)
.def("__setitem__", &base_set_item)
@@ -189,12 +189,12 @@ namespace boost { namespace python {
.def("__contains__", &base_contains)
.def("__iter__", def_iterator())
;
DerivedPolicies::extension_def(cl);
}
}
template <class Class>
static void
static void
extension_def(Class& cl)
{
// default.
@@ -202,24 +202,24 @@ namespace boost { namespace python {
}
private:
static object
base_get_item(back_reference<Container&> container, PyObject* i)
{
{
if (PySlice_Check(i))
return slice_handler::base_get_slice(
container.get(), reinterpret_cast<PySliceObject*>(i));
container.get(), static_cast<PySliceObject*>(static_cast<void*>(i)));
return proxy_handler::base_get_item_(container, i);
}
static void
static void
base_set_item(Container& container, PyObject* i, PyObject* v)
{
if (PySlice_Check(i))
{
slice_handler::base_set_slice(container,
reinterpret_cast<PySliceObject*>(i), v);
slice_handler::base_set_slice(container,
static_cast<PySliceObject*>(static_cast<void*>(i)), v);
}
else
{
@@ -228,7 +228,7 @@ namespace boost { namespace python {
if (elem.check())
{
DerivedPolicies::
set_item(container,
set_item(container,
DerivedPolicies::
convert_index(container, i), elem());
}
@@ -239,7 +239,7 @@ namespace boost { namespace python {
if (elem.check())
{
DerivedPolicies::
set_item(container,
set_item(container,
DerivedPolicies::
convert_index(container, i), elem());
}
@@ -252,20 +252,20 @@ namespace boost { namespace python {
}
}
static void
static void
base_delete_item(Container& container, PyObject* i)
{
if (PySlice_Check(i))
{
slice_handler::base_delete_slice(
container, reinterpret_cast<PySliceObject*>(i));
container, static_cast<PySliceObject*>(static_cast<void*>(i)));
return;
}
Index index = DerivedPolicies::convert_index(container, i);
proxy_handler::base_erase_index(container, index, mpl::bool_<NoSlice>());
DerivedPolicies::delete_item(container, index);
}
}
static size_t
base_size(Container& container)
@@ -290,10 +290,10 @@ namespace boost { namespace python {
return DerivedPolicies::contains(container, x());
else
return false;
}
}
}
};
}} // namespace boost::python
}} // namespace boost::python
#endif // INDEXING_SUITE_JDG20036_HPP

View File

@@ -9,13 +9,67 @@
# include <boost/python/converter/registry.hpp>
# include <boost/python/converter/as_to_python_function.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/python/type_id.hpp>
namespace boost { namespace python {
template <class T, class Conversion>
struct to_python_converter
#if 0 //get_pytype member detection
namespace detail
{
typedef char yes_type;
typedef struct {char a[2]; } no_type;
template<PyTypeObject const * (*f)()> struct test_get_pytype1 { };
template<PyTypeObject * (*f)()> struct test_get_pytype2 { };
template<class T> yes_type tester(test_get_pytype1<&T::get_pytype>*);
template<class T> yes_type tester(test_get_pytype2<&T::get_pytype>*);
template<class T> no_type tester(...);
template<class T>
struct test_get_pytype_base
{
BOOST_STATIC_CONSTANT(bool, value= (sizeof(detail::tester<T>(0)) == sizeof(yes_type)));
};
template<class T>
struct test_get_pytype : boost::mpl::bool_<test_get_pytype_base<T>::value>
{
};
}
#endif
template < class T, class Conversion, bool has_get_pytype=false >
struct to_python_converter
{
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
#if 0 //defined _MSC_VER && _MSC_VER >=1310
//probably other compilers could come here as well
typedef typename detail::test_get_pytype<Conversion> HasGetPytype;
#else
typedef boost::mpl::bool_<has_get_pytype> HasGetPytype;
#endif
static PyTypeObject const* get_pytype_1(boost::mpl::true_ *)
{
return Conversion::get_pytype();
}
static PyTypeObject const* get_pytype_1(boost::mpl::false_ *)
{
return 0;
}
static PyTypeObject const* get_pytype_impl()
{
return get_pytype_1((HasGetPytype*)0);
}
#endif
to_python_converter();
};
@@ -23,18 +77,23 @@ struct to_python_converter
// implementation
//
template <class T, class Conversion>
to_python_converter<T,Conversion>::to_python_converter()
template <class T, class Conversion ,bool has_get_pytype>
to_python_converter<T,Conversion, has_get_pytype>::to_python_converter()
{
typedef converter::as_to_python_function<
T, Conversion
> normalized;
converter::registry::insert(
&normalized::convert
, type_id<T>());
, type_id<T>()
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
, &get_pytype_impl
#endif
);
}
}} // namespace boost::python
#endif // TO_PYTHON_CONVERTER_DWA200221_HPP

View File

@@ -12,6 +12,10 @@
# include <boost/python/detail/none.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/python/refcount.hpp>
# include <boost/type_traits/is_pointer.hpp>
@@ -36,7 +40,13 @@ struct to_python_indirect
{
return this->execute(const_cast<U&>(ref), is_pointer<U>());
}
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
inline PyTypeObject const*
get_pytype()const
{
return converter::registered_pytype<T>::get_pytype();
}
#endif
private:
template <class U>
inline PyObject* execute(U* ptr, mpl::true_) const

View File

@@ -9,12 +9,12 @@
# include <boost/python/refcount.hpp>
# include <boost/python/tag.hpp>
# include <boost/python/handle.hpp>
# include <boost/python/converter/registry.hpp>
# include <boost/python/converter/registered.hpp>
# include <boost/python/converter/builtin_converters.hpp>
# include <boost/python/converter/object_manager.hpp>
# include <boost/python/converter/object_manager.hpp>
# include <boost/python/converter/shared_ptr_to_python.hpp>
# include <boost/python/detail/value_is_shared_ptr.hpp>
@@ -24,17 +24,57 @@
# include <boost/mpl/if.hpp>
# include <boost/mpl/or.hpp>
# include <boost/type_traits/is_const.hpp>
namespace boost { namespace python {
namespace detail
{
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
template <bool is_const_ref>
struct object_manager_get_pytype
{
template <class U>
static PyTypeObject const* get( U& (*p)() =0)
{
return converter::object_manager_traits<U>::get_pytype();
}
};
template <>
struct object_manager_get_pytype<true>
{
template <class U>
static PyTypeObject const* get( U const& (*p)() =0)
{
return converter::object_manager_traits<U>::get_pytype();
}
};
#endif
template <class T>
struct object_manager_to_python_value
{
typedef typename value_arg<T>::type argument_type;
PyObject* operator()(argument_type) const;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
typedef boost::mpl::bool_<is_handle<T>::value> is_t_handle;
typedef boost::detail::indirect_traits::is_reference_to_const<T> is_t_const;
PyTypeObject const* get_pytype() const {
return get_pytype_aux((is_t_handle*)0);
}
inline static PyTypeObject const* get_pytype_aux(mpl::true_*) {return converter::object_manager_traits<T>::get_pytype();}
inline static PyTypeObject const* get_pytype_aux(mpl::false_* )
{
return object_manager_get_pytype<is_t_const::value>::get((T(*)())0);
}
#endif
// This information helps make_getter() decide whether to try to
// return an internal reference or not. I don't like it much,
@@ -49,6 +89,9 @@ namespace detail
typedef typename value_arg<T>::type argument_type;
PyObject* operator()(argument_type) const;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
PyTypeObject const* get_pytype() const {return converter::registered<T>::converters.to_python_target_type();}
#endif
// This information helps make_getter() decide whether to try to
// return an internal reference or not. I don't like it much,
@@ -62,11 +105,20 @@ namespace detail
typedef typename value_arg<T>::type argument_type;
PyObject* operator()(argument_type) const;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
PyTypeObject const* get_pytype() const {return get_pytype((boost::type<argument_type>*)0);}
#endif
// This information helps make_getter() decide whether to try to
// return an internal reference or not. I don't like it much,
// but it will have to serve for now.
BOOST_STATIC_CONSTANT(bool, uses_registry = false);
private:
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
template <class U>
PyTypeObject const* get_pytype(boost::type<shared_ptr<U> &> *) const {return converter::registered<U>::converters.to_python_target_type();}
template <class U>
PyTypeObject const* get_pytype(boost::type<const shared_ptr<U> &> *) const {return converter::registered<U>::converters.to_python_target_type();}
#endif
};
}

View File

@@ -1,141 +0,0 @@
// Copyright David Abrahams 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)
#ifdef _AIX
#include <cstdio>
#include <cstdlib>
extern "C"
{
#include <sys/stat.h>
#include <unistd.h>
}
# include <string>
# include <boost/python/detail/wrap_python.hpp>
# include <boost/python/errors.hpp>
# include <boost/python/detail/aix_init_module.hpp>
# include <boost/python/module.hpp>
namespace boost { namespace python { namespace detail {
namespace
{
static PyMethodDef initial_methods[] = { { 0, 0, 0, 0 } };
extern "C" void initlibboost_python()
{
Py_InitModule("libboost_python", initial_methods);
}
struct find_and_open_file
{
FILE* fp;
std::string libpath; // -- search path
std::string filename; // -- filename to look for
std::string fullpath; // -- full path to file
find_and_open_file(
const std::string& libpath_env
, const std::string& file);
};
find_and_open_file::find_and_open_file(
const std::string& libpath_env
, const std::string& file)
: fp(0)
{
char* value = std::getenv(libpath_env.c_str());
if(value == 0)
return;
libpath = value;
if (libpath == "")
return;
std::string::size_type pos = 0, prev_pos = 0;
// -- loop through all search paths looking for file
while((pos = libpath.find_first_of(":",pos)) != std::string::npos)
{
fullpath = libpath.substr(prev_pos,pos - prev_pos) + "/" + file;
if (::access(fullpath.c_str(), R_OK) == 0)
{
struct stat filestat;
::stat(fullpath.c_str(), &filestat);
if (!S_ISDIR(filestat.st_mode))
{
fp = std::fopen(fullpath.c_str(), "r");
if (fp)
{
filename = file;
}
return;
}
}
prev_pos = ++pos;
}
// -- mop up odd path
if (libpath.find_first_of(":", prev_pos) == std::string::npos)
{
fullpath = libpath.substr(prev_pos, libpath.size() - prev_pos) + "/" + file;
if (::access(fullpath.c_str(), R_OK) == 0)
{
struct stat filestat;
::stat(fullpath.c_str(),&filestat);
if (!S_ISDIR(filestat.st_mode))
{
fp = std::fopen(fullpath.c_str(), "r");
filename = file;
}
}
}
}
}
void aix_init_module(
so_load_function load_dynamic_module
, char const* module_name
, void (*init_module)())
{
static bool initialized;
if (!initialized)
{
char const* const name = "libboost_python.so";
find_and_open_file dynlib("LIBPATH", name);
if (dynlib.fp == 0)
{
fprintf(stderr, " Error: could not find %s\n", name);
return;
}
std::string::size_type pos = pos = dynlib.filename.rfind(".so");
if (pos != dynlib.filename.size() - 3)
{
fprintf(stderr, "dynamic library %s must end with .so\n", dynlib.filename.c_str());
return;
}
PyObject* m =
load_dynamic_module(
const_cast<char*>(dynlib.filename.substr(0,pos).c_str()),
const_cast<char*>(dynlib.fullpath.c_str()),
dynlib.fp);
if (m == 0)
{
fprintf(stderr, "failed to load library %s\n", name);
return;
}
Py_DECREF(m);
initialized = true;
}
python::detail::init_module(module_name, init_module);
}
}}} // namespace boost::python
#endif

View File

@@ -16,6 +16,7 @@
#include <boost/python/converter/registry.hpp>
#include <boost/python/converter/registrations.hpp>
#include <boost/python/converter/shared_ptr_deleter.hpp>
#include <boost/python/converter/pytype_function.hpp>
#include <boost/cast.hpp>
#include <string>
@@ -56,6 +57,7 @@ namespace
&slot_rvalue_from_python<T,SlotPolicy>::convertible
, &slot_rvalue_from_python<T,SlotPolicy>::construct
, type_id<T>()
, &SlotPolicy::get_pytype
);
}
@@ -100,6 +102,7 @@ namespace
return (PyInt_Check(obj) || PyLong_Check(obj))
? &number_methods->nb_int : 0;
}
static PyTypeObject const* get_pytype() { return &PyInt_Type;}
};
template <class T>
@@ -135,6 +138,7 @@ namespace
return (PyInt_Check(obj) || PyLong_Check(obj))
? &py_object_identity : 0;
}
static PyTypeObject const* get_pytype() { return &PyInt_Type;}
};
template <class T>
@@ -173,6 +177,7 @@ namespace
else
return 0;
}
static PyTypeObject const* get_pytype() { return &PyInt_Type;}
};
struct long_long_rvalue_from_python : long_long_rvalue_from_python_base
@@ -228,6 +233,15 @@ namespace
{
return PyObject_IsTrue(intermediate);
}
static PyTypeObject const* get_pytype()
{
#if PY_VERSION_HEX >= 0x02030000
return &PyBool_Type;
#else
return &PyInt_Type;
#endif
}
};
// A SlotPolicy for extracting floating types from Python objects.
@@ -259,6 +273,7 @@ namespace
return PyFloat_AS_DOUBLE(intermediate);
}
}
static PyTypeObject const* get_pytype() { return &PyFloat_Type;}
};
// A SlotPolicy for extracting C++ strings from Python objects.
@@ -276,6 +291,7 @@ namespace
{
return std::string(PyString_AsString(intermediate),PyString_Size(intermediate));
}
static PyTypeObject const* get_pytype() { return &PyString_Type;}
};
#if defined(Py_USING_UNICODE) && !defined(BOOST_NO_STD_WSTRING)
@@ -316,6 +332,7 @@ namespace
}
return result;
}
static PyTypeObject const* get_pytype() { return &PyUnicode_Type;}
};
#endif
@@ -346,6 +363,7 @@ namespace
return PyFloat_AS_DOUBLE(intermediate);
}
}
static PyTypeObject const* get_pytype() { return &PyComplex_Type;}
};
}
@@ -411,7 +429,7 @@ void initialize_builtin_converters()
slot_rvalue_from_python<std::complex<long double>,complex_rvalue_from_python>();
// Add an lvalue converter for char which gets us char const*
registry::insert(convert_to_cstring,type_id<char>());
registry::insert(convert_to_cstring,type_id<char>(),&converter::wrap_pytype<&PyString_Type>::get_pytype);
// Register by-value converters to std::string, std::wstring
#if defined(Py_USING_UNICODE) && !defined(BOOST_NO_STD_WSTRING)

View File

@@ -20,6 +20,35 @@
#endif
namespace boost { namespace python { namespace converter {
BOOST_PYTHON_DECL PyTypeObject const* registration::expected_from_python_type() const
{
if (this->m_class_object != 0)
return this->m_class_object;
std::set<PyTypeObject const*> pool;
for(rvalue_from_python_chain* r = rvalue_chain; r ; r=r->next)
if(r->expected_pytype)
pool.insert(r->expected_pytype());
//for now I skip the search for common base
if (pool.size()==1)
return *pool.begin();
return 0;
}
BOOST_PYTHON_DECL PyTypeObject const* registration::to_python_target_type() const
{
if (this->m_class_object != 0)
return this->m_class_object;
if (this->m_to_python_target_type != 0)
return this->m_to_python_target_type();
return 0;
}
BOOST_PYTHON_DECL PyTypeObject* registration::get_class_object() const
{
@@ -57,6 +86,24 @@ BOOST_PYTHON_DECL PyObject* registration::to_python(void const volatile* source)
: this->m_to_python(const_cast<void*>(source));
}
namespace
{
template< typename T >
void delete_node( T* node )
{
if( !!node && !!node->next )
delete_node( node->next );
delete node;
}
}
registration::~registration()
{
delete_node(lvalue_chain);
delete_node(rvalue_chain);
}
namespace // <unnamed>
{
typedef registration entry;
@@ -150,15 +197,15 @@ namespace // <unnamed>
namespace registry
{
void insert(to_python_function_t f, type_info source_t)
void insert(to_python_function_t f, type_info source_t, PyTypeObject const* (*to_python_target_type)())
{
# ifdef BOOST_PYTHON_TRACE_REGISTRY
std::cout << "inserting to_python " << source_t << "\n";
# endif
to_python_function_t& slot = get(source_t)->m_to_python;
entry* slot = get(source_t);
assert(slot == 0); // we have a problem otherwise
if (slot != 0)
assert(slot->m_to_python == 0); // we have a problem otherwise
if (slot->m_to_python != 0)
{
std::string msg = (
std::string("to-Python converter for ")
@@ -171,11 +218,12 @@ namespace registry
throw_error_already_set();
}
}
slot = f;
slot->m_to_python = f;
slot->m_to_python_target_type = to_python_target_type;
}
// Insert an lvalue from_python converter
void insert(convertible_function convert, type_info key)
void insert(convertible_function convert, type_info key, PyTypeObject const* (*exp_pytype)())
{
# ifdef BOOST_PYTHON_TRACE_REGISTRY
std::cout << "inserting lvalue from_python " << key << "\n";
@@ -186,13 +234,14 @@ namespace registry
registration->next = found->lvalue_chain;
found->lvalue_chain = registration;
insert(convert, 0, key);
insert(convert, 0, key,exp_pytype);
}
// Insert an rvalue from_python converter
void insert(void* (*convertible)(PyObject*)
, constructor_function construct
, type_info key)
, type_info key
, PyTypeObject const* (*exp_pytype)())
{
# ifdef BOOST_PYTHON_TRACE_REGISTRY
std::cout << "inserting rvalue from_python " << key << "\n";
@@ -201,6 +250,7 @@ namespace registry
rvalue_from_python_chain *registration = new rvalue_from_python_chain;
registration->convertible = convertible;
registration->construct = construct;
registration->expected_pytype = exp_pytype;
registration->next = found->rvalue_chain;
found->rvalue_chain = registration;
}
@@ -208,7 +258,8 @@ namespace registry
// Insert an rvalue from_python converter
void push_back(void* (*convertible)(PyObject*)
, constructor_function construct
, type_info key)
, type_info key
, PyTypeObject const* (*exp_pytype)())
{
# ifdef BOOST_PYTHON_TRACE_REGISTRY
std::cout << "push_back rvalue from_python " << key << "\n";
@@ -220,6 +271,7 @@ namespace registry
rvalue_from_python_chain *registration = new rvalue_from_python_chain;
registration->convertible = convertible;
registration->construct = construct;
registration->expected_pytype = exp_pytype;
registration->next = 0;
*found = registration;
}

View File

@@ -171,4 +171,14 @@ list dict_base::values() const
}
}
static struct register_dict_pytype_ptr
{
register_dict_pytype_ptr()
{
const_cast<converter::registration &>(
converter::registry::lookup(boost::python::type_id<boost::python::dict>())
).m_class_object = &PyDict_Type;
}
}register_dict_pytype_ptr_;
}}} // namespace boost::python

View File

@@ -13,6 +13,15 @@ namespace boost
namespace python
{
object BOOST_PYTHON_DECL eval(str string, object global, object local)
{
// should be 'char const *' but older python versions don't use 'const' yet.
char *s = python::extract<char *>(string);
PyObject* result = PyRun_String(s, Py_eval_input, global.ptr(), local.ptr());
if (!result) throw_error_already_set();
return object(detail::new_reference(result));
}
object BOOST_PYTHON_DECL exec(str string, object global, object local)
{
// should be 'char const *' but older python versions don't use 'const' yet.

View File

@@ -137,4 +137,14 @@ long list_base::count(object_cref value) const
return result;
}
static struct register_list_pytype_ptr
{
register_list_pytype_ptr()
{
const_cast<converter::registration &>(
converter::registry::lookup(boost::python::type_id<boost::python::list>())
).m_class_object = &PyList_Type;
}
}register_list_pytype_ptr_;
}}} // namespace boost::python

View File

@@ -532,6 +532,10 @@ namespace objects
if (scope().ptr() != Py_None)
scope().attr(name) = result;
// For pickle. Will lead to informative error messages if pickling
// is not enabled.
result.attr("__reduce__") = object(make_instance_reduce_function());
return result;
}
}
@@ -629,7 +633,6 @@ namespace objects
void class_base::enable_pickling_(bool getstate_manages_dict)
{
setattr("__reduce__", object(make_instance_reduce_function()));
setattr("__safe_for_unpickling__", object(true));
if (getstate_manages_dict)

View File

@@ -32,10 +32,11 @@ extern "C"
{
static PyObject* enum_repr(PyObject* self_)
{
const char *mod = PyString_AsString(PyObject_GetAttrString( self_, "__module__"));
enum_object* self = downcast<enum_object>(self_);
if (!self->name)
{
return PyString_FromFormat("%s(%ld)", self_->ob_type->tp_name, PyInt_AS_LONG(self_));
return PyString_FromFormat("%s.%s(%ld)", mod, self_->ob_type->tp_name, PyInt_AS_LONG(self_));
}
else
{
@@ -43,7 +44,7 @@ extern "C"
if (name == 0)
return 0;
return PyString_FromFormat("%s.%s", self_->ob_type->tp_name, name);
return PyString_FromFormat("%s.%s.%s", mod, self_->ob_type->tp_name, name);
}
}
@@ -120,7 +121,7 @@ object module_prefix();
namespace
{
object new_enum_type(char const* name)
object new_enum_type(char const* name, char const *doc)
{
if (enum_type_object.tp_dict == 0)
{
@@ -141,10 +142,11 @@ namespace
object module_name = module_prefix();
if (module_name)
module_name += '.';
d["__module__"] = module_name;
if (doc)
d["__doc__"] = doc;
object result = (object(metatype))(
module_name + name, make_tuple(base), d);
object result = (object(metatype))(name, make_tuple(base), d);
scope().attr(name) = result;
@@ -158,8 +160,9 @@ enum_base::enum_base(
, converter::convertible_function convertible
, converter::constructor_function construct
, type_info id
, char const *doc
)
: object(new_enum_type(name))
: object(new_enum_type(name, doc))
{
converter::registration& converters
= const_cast<converter::registration&>(

View File

@@ -6,6 +6,7 @@
#include <boost/python/docstring_options.hpp>
#include <boost/python/object/function_object.hpp>
#include <boost/python/object/function_handle.hpp>
#include <boost/python/object/function_doc_signature.hpp>
#include <boost/python/errors.hpp>
#include <boost/python/str.hpp>
#include <boost/python/object_attributes.hpp>
@@ -17,6 +18,7 @@
#include <boost/python/ssize_t.hpp>
#include <boost/python/detail/signature.hpp>
#include <boost/python/detail/none.hpp>
#include <boost/mpl/vector/vector10.hpp>
#include <boost/bind.hpp>
@@ -30,7 +32,12 @@
namespace boost { namespace python {
volatile bool docstring_options::show_user_defined_ = true;
volatile bool docstring_options::show_signatures_ = true;
volatile bool docstring_options::show_cpp_signatures_ = true;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
volatile bool docstring_options::show_py_signatures_ = true;
#else
volatile bool docstring_options::show_py_signatures_ = false;
#endif
}}
namespace boost { namespace python { namespace objects {
@@ -411,6 +418,12 @@ void function::add_to_namespace(
add_to_namespace(name_space, name_, attribute, 0);
}
namespace detail
{
extern char py_signature_tag[];
extern char cpp_signature_tag[];
}
void function::add_to_namespace(
object const& name_space, char const* name_, object const& attribute, char const* doc)
{
@@ -487,6 +500,7 @@ void function::add_to_namespace(
throw_error_already_set();
object mutable_attribute(attribute);
/*
if (doc != 0 && docstring_options::show_user_defined_)
{
// Accumulate documentation
@@ -507,7 +521,8 @@ void function::add_to_namespace(
{
if ( PyObject_HasAttrString(mutable_attribute.ptr(), "__doc__")
&& mutable_attribute.attr("__doc__")) {
mutable_attribute.attr("__doc__") += "\n";
mutable_attribute.attr("__doc__") += (
mutable_attribute.attr("__doc__")[-1] != "\n" ? "\n\n" : "\n");
}
else {
mutable_attribute.attr("__doc__") = "";
@@ -516,6 +531,28 @@ void function::add_to_namespace(
mutable_attribute.attr("__doc__") += str("\n ").join(make_tuple(
"C++ signature:", f->signature(true)));
}
*/
str _doc;
if (docstring_options::show_py_signatures_)
{
_doc += str(reinterpret_cast<const char*>(detail::py_signature_tag));
}
if (doc != 0 && docstring_options::show_user_defined_)
_doc += doc;
if (docstring_options::show_cpp_signatures_)
{
// if(len(_doc))
// _doc += "\n"+str(reinterpret_cast<const char*>(detail::cpp_signature_tag));
// else
_doc += str(reinterpret_cast<const char*>(detail::cpp_signature_tag));
}
if(_doc)
{
object mutable_attribute(attribute);
mutable_attribute.attr("__doc__")= _doc;
}
}
BOOST_PYTHON_DECL void add_to_namespace(
@@ -590,7 +627,10 @@ extern "C"
static PyObject* function_get_doc(PyObject* op, void*)
{
function* f = downcast<function>(op);
return python::incref(f->doc().ptr());
list signatures = function_doc_signature_generator::function_doc_signatures(f);
if(!signatures) return python::detail::none();
signatures.reverse();
return python::incref( str("\n").join(signatures).ptr());
}
static int function_set_doc(PyObject* op, PyObject* doc, void*)

View File

@@ -0,0 +1,342 @@
// 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)
#include <boost/python/converter/registrations.hpp>
#include <boost/python/object/function_doc_signature.hpp>
#include <boost/python/errors.hpp>
#include <boost/python/str.hpp>
#include <boost/python/args.hpp>
#include <boost/python/tuple.hpp>
#include <boost/python/detail/signature.hpp>
#include <vector>
namespace boost { namespace python { namespace objects {
bool function_doc_signature_generator::arity_cmp( function const *f1, function const *f2 )
{
return f1->m_fn.max_arity() < f2->m_fn.max_arity();
}
bool function_doc_signature_generator::are_seq_overloads( function const *f1, function const *f2 , bool check_docs)
{
py_function const & impl1 = f1->m_fn;
py_function const & impl2 = f2->m_fn;
//the number of parameters differs by 1
if (impl2.max_arity()-impl1.max_arity() != 1)
return false;
// if check docs then f1 shold not have docstring or have the same docstring as f2
if (check_docs && f2->doc() != f1->doc() && f1->doc())
return false;
python::detail::signature_element const* s1 = impl1.signature();
python::detail::signature_element const* s2 = impl2.signature();
unsigned size = impl1.max_arity()+1;
for (unsigned i = 0; i != size; ++i)
{
//check if the argument types are the same
if (s1[i].basename != s2[i].basename)
return false;
//return type
if (!i) continue;
//check if the argument default values are the same
bool f1_has_names = bool(f1->m_arg_names);
bool f2_has_names = bool(f2->m_arg_names);
if ( f1_has_names && f2_has_names && f2->m_arg_names[i-1]!=f1->m_arg_names[i-1]
|| f1_has_names && !f2_has_names
|| !f1_has_names && f2_has_names && f2->m_arg_names[i-1]!=python::object()
)
return false;
}
return true;
}
std::vector<function const*> function_doc_signature_generator::flatten(function const *f)
{
object name = f->name();
std::vector<function const*> res;
while (f) {
//this if takes out the not_implemented_function
if (f->name() == name)
res.push_back(f);
f=f->m_overloads.get();
}
//std::sort(res.begin(),res.end(), &arity_cmp);
return res;
}
std::vector<function const*> function_doc_signature_generator::split_seq_overloads( const std::vector<function const *> &funcs, bool split_on_doc_change)
{
std::vector<function const*> res;
std::vector<function const*>::const_iterator fi = funcs.begin();
function const * last = *fi;
while (++fi != funcs.end()){
//check if fi starts a new chain of overloads
if (!are_seq_overloads( last, *fi, split_on_doc_change ))
res.push_back(last);
last = *fi;
}
if (last)
res.push_back(last);
return res;
}
str function_doc_signature_generator::raw_function_pretty_signature(function const *f, size_t n_overloads, bool cpp_types )
{
str res("object");
res = str("%s %s(%s)" % make_tuple( res, f->m_name, str("tuple args, dict kwds")) );
return res;
}
const char * function_doc_signature_generator::py_type_str(const python::detail::signature_element &s)
{
if (s.basename==std::string("void")){
static const char * none = "None";
return none;
}
PyTypeObject const * py_type = s.pytype_f?s.pytype_f():0;
if ( py_type )
return py_type->tp_name;
else{
static const char * object = "object";
return object;
}
}
str function_doc_signature_generator::parameter_string(py_function const &f, size_t n, object arg_names, bool cpp_types)
{
str param;
python::detail::signature_element const * s = f.signature();
if (cpp_types)
{
if(!n)
s = &f.get_return_type();
if (s[n].basename == 0)
{
return str("...");
}
param = str(s[n].basename);
if (s[n].lvalue)
param += " {lvalue}";
}
else
{
if (n) //we are processing an argument and trying to come up with a name for it
{
object kv;
if ( arg_names && (kv = arg_names[n-1]) )
param = str( " (%s)%s" % make_tuple(py_type_str(s[n]),kv[0]) );
else
param = str(" (%s)%s%d" % make_tuple(py_type_str(s[n]),"arg", n) );
}
else //we are processing the return type
param = py_type_str(f.get_return_type());
}
//an argument - check for default value and append it
if(n && arg_names)
{
object kv(arg_names[n-1]);
if (kv && len(kv) == 2)
{
param = str("%s=%r" % make_tuple(param, kv[1]));
}
}
return param;
}
str function_doc_signature_generator::pretty_signature(function const *f, size_t n_overloads, bool cpp_types )
{
py_function
const& impl = f->m_fn;
;
unsigned arity = impl.max_arity();
if(arity == unsigned(-1))// is this the proper raw function test?
{
return raw_function_pretty_signature(f,n_overloads,cpp_types);
}
list formal_params;
size_t n_extra_default_args=0;
for (unsigned n = 0; n <= arity; ++n)
{
str param;
formal_params.append(
parameter_string(impl, n, f->m_arg_names, cpp_types)
);
// find all the arguments with default values preceeding the arity-n_overloads
if (n && f->m_arg_names)
{
object kv(f->m_arg_names[n-1]);
if (kv && len(kv) == 2)
{
//default argument preceeding the arity-n_overloads
if( n <= arity-n_overloads)
++n_extra_default_args;
}
else
//argument without default, preceeding the arity-n_overloads
if( n <= arity-n_overloads)
n_extra_default_args = 0;
}
}
n_overloads+=n_extra_default_args;
if (!arity && cpp_types)
formal_params.append("void");
str ret_type (formal_params.pop(0));
if (cpp_types )
{
return str(
"%s %s(%s%s%s%s)"
% make_tuple
( ret_type
, f->m_name
, str(",").join(formal_params.slice(0,arity-n_overloads))
, n_overloads ? (n_overloads!=arity?str(" [,"):str("[ ")) : str()
, str(" [,").join(formal_params.slice(arity-n_overloads,arity))
, std::string(n_overloads,']')
));
}else{
return str(
"%s(%s%s%s%s) -> %s"
% make_tuple
( f->m_name
, str(",").join(formal_params.slice(0,arity-n_overloads))
, n_overloads ? (n_overloads!=arity?str(" [,"):str("[ ")) : str()
, str(" [,").join(formal_params.slice(arity-n_overloads,arity))
, std::string(n_overloads,']')
, ret_type
));
}
return str(
"%s %s(%s%s%s%s) %s"
% make_tuple
( cpp_types?ret_type:str("")
, f->m_name
, str(",").join(formal_params.slice(0,arity-n_overloads))
, n_overloads ? (n_overloads!=arity?str(" [,"):str("[ ")) : str()
, str(" [,").join(formal_params.slice(arity-n_overloads,arity))
, std::string(n_overloads,']')
, cpp_types?str(""):ret_type
));
}
namespace detail {
char py_signature_tag[] = "PY signature :";
char cpp_signature_tag[] = "C++ signature :";
}
list function_doc_signature_generator::function_doc_signatures( function const * f)
{
list signatures;
std::vector<function const*> funcs = flatten( f);
std::vector<function const*> split_funcs = split_seq_overloads( funcs, true);
std::vector<function const*>::const_iterator sfi=split_funcs.begin(), fi;
size_t n_overloads=0;
for (fi=funcs.begin(); fi!=funcs.end(); ++fi)
{
if(*sfi == *fi){
if((*fi)->doc())
{
str func_doc = str((*fi)->doc());
int doc_len = len(func_doc);
bool show_py_signature = doc_len >= int(sizeof(detail::py_signature_tag)/sizeof(char)-1)
&& str(detail::py_signature_tag) == func_doc.slice(0, int(sizeof(detail::py_signature_tag)/sizeof(char))-1);
if(show_py_signature)
{
func_doc = str(func_doc.slice(int(sizeof(detail::py_signature_tag)/sizeof(char))-1, _));
doc_len = len(func_doc);
}
bool show_cpp_signature = doc_len >= int(sizeof(detail::cpp_signature_tag)/sizeof(char)-1)
&& str(detail::cpp_signature_tag) == func_doc.slice( 1-int(sizeof(detail::cpp_signature_tag)/sizeof(char)), _);
if(show_cpp_signature)
{
func_doc = str(func_doc.slice(_, 1-int(sizeof(detail::cpp_signature_tag)/sizeof(char))));
doc_len = len(func_doc);
}
str res="\n";
str pad = "\n";
if(show_py_signature)
{
str sig = pretty_signature(*fi, n_overloads,false);
res+=sig;
if(doc_len || show_cpp_signature )res+=" :";
pad+= str(" ");
}
if(doc_len)
{
if(show_py_signature)
res+=pad;
res+= pad.join(func_doc.split("\n"));
}
if( show_cpp_signature)
{
if(len(res)>1)
res+="\n"+pad;
res+=detail::cpp_signature_tag+pad+" "+pretty_signature(*fi, n_overloads,true);
}
signatures.append(res);
}
++sfi;
n_overloads = 0;
}else
++n_overloads ;
}
return signatures;
}
}}}

View File

@@ -8,6 +8,7 @@
#include <boost/python/tuple.hpp>
#include <boost/python/list.hpp>
#include <boost/python/dict.hpp>
#include <boost/python/str.hpp>
namespace boost { namespace python {
@@ -19,6 +20,22 @@ namespace {
object instance_class(instance_obj.attr("__class__"));
result.append(instance_class);
object none;
if (!getattr(instance_obj, "__safe_for_unpickling__", none))
{
str type_name(getattr(instance_class, "__name__"));
str module_name(getattr(instance_class, "__module__", object("")));
if (module_name)
module_name += ".";
PyErr_SetObject(
PyExc_RuntimeError,
( "Pickling of \"%s\" instances is not enabled"
" (http://www.boost.org/libs/python/doc/v2/pickle.html)"
% (module_name+type_name)).ptr()
);
throw_error_already_set();
}
object getinitargs = getattr(instance_obj, "__getinitargs__", none);
tuple initargs;
if (getinitargs.ptr() != none.ptr()) {

View File

@@ -349,5 +349,15 @@ BOOST_PYTHON_DEFINE_STR_METHOD(title, 0)
BOOST_PYTHON_DEFINE_STR_METHOD(translate, 1)
BOOST_PYTHON_DEFINE_STR_METHOD(translate, 2)
BOOST_PYTHON_DEFINE_STR_METHOD(upper, 0)
static struct register_str_pytype_ptr
{
register_str_pytype_ptr()
{
const_cast<converter::registration &>(
converter::registry::lookup(boost::python::type_id<boost::python::str>())
).m_class_object = &PyString_Type;
}
}register_str_pytype_ptr_;
}}} // namespace boost::python

View File

@@ -21,4 +21,15 @@ tuple_base::tuple_base(object_cref sequence)
: object(call(sequence))
{}
static struct register_tuple_pytype_ptr
{
register_tuple_pytype_ptr()
{
const_cast<converter::registration &>(
converter::registry::lookup(boost::python::type_id<boost::python::tuple>())
).m_class_object = &PyTuple_Type;
}
}register_tuple_pytype_ptr_;
}}} // namespace boost::python

View File

@@ -2,12 +2,20 @@
# Software License, Version 1.0. (See accompanying
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
import python ;
use-project /boost/python : ../build ;
project /boost/python/test ;
local PY = ;
if [ python.configured ]
{
PY = /python//python ;
}
rule py-run ( sources * : input-file ? )
{
return [ run $(sources) /boost/python//boost_python /python//python
return [ run $(sources) /boost/python//boost_python $(PY)
: # args
: $(input-file)
: #requirements
@@ -31,7 +39,7 @@ test-suite python
:
[
run exec.cpp ../build//boost_python/<link>static /python//python
run exec.cpp ../build//boost_python/<link>static $(PY)
: # program args
: exec.py # input files
: # requirements
@@ -76,7 +84,7 @@ bpl-test crossmod_exception
[ bpl-test minimal ]
[ bpl-test args ]
[ bpl-test raw_ctor ]
[ bpl-test numpy : numpy.py printer.py numeric_tests.py numarray_tests.py numpy.cpp ]
[ bpl-test numpy : printer.py numeric_tests.py numarray_tests.py numpy.py numpy.cpp ]
[ bpl-test enum ]
[ bpl-test exception_translator ]
[ bpl-test pearu1 : test_cltree.py cltree.cpp ]
@@ -90,6 +98,7 @@ bpl-test crossmod_exception
[ bpl-test test_pointer_adoption ]
[ bpl-test operators ]
[ bpl-test operators_wrapper ]
[ bpl-test callbacks ]
[ bpl-test defaults ]
@@ -142,6 +151,7 @@ bpl-test crossmod_opaque
[ bpl-test nested ]
[ bpl-test docstring ]
[ bpl-test pytype_function ]
[ bpl-test vector_indexing_suite ]
@@ -154,11 +164,12 @@ bpl-test crossmod_opaque
<toolset>hp_cxx:<build>no ]
[ python-extension map_indexing_suite_ext
: map_indexing_suite.cpp int_map_indexing_suite.cpp
: map_indexing_suite.cpp int_map_indexing_suite.cpp a_map_indexing_suite.cpp
/boost/python//boost_python ]
[ bpl-test
map_indexing_suite : map_indexing_suite.py map_indexing_suite_ext ]
[ py-run import_.cpp : import_.py ]
# if $(TEST_BIENSTMAN_NON_BUGS)
# {
# bpl-test bienstman4 ;
@@ -188,7 +199,7 @@ bpl-test crossmod_opaque
:
:
: <define>BOOST_PYTHON_STATIC_LIB
<use>/python//python
<use>$(PY)
]

84
test/a_map_indexing_suite.cpp Executable file
View File

@@ -0,0 +1,84 @@
// Copyright Joel de Guzman 2004. 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)
#include <boost/python/suite/indexing/map_indexing_suite.hpp>
#include <boost/python/module.hpp>
#include <boost/python/def.hpp>
#include <boost/python/implicit.hpp>
using namespace boost::python;
struct A
{
int value;
A() : value(0){};
A(int v) : value(v) {};
};
bool operator==(const A& v1, const A& v2)
{
return (v1.value == v2.value);
}
struct B
{
A a;
};
// Converter from A to python int
struct AToPython
{
static PyObject* convert(const A& s)
{
return boost::python::incref(boost::python::object((int)s.value).ptr());
}
};
// Conversion from python int to A
struct AFromPython
{
AFromPython()
{
boost::python::converter::registry::push_back(
&convertible,
&construct,
boost::python::type_id< A >());
}
static void* convertible(PyObject* obj_ptr)
{
if (!PyInt_Check(obj_ptr)) return 0;
return obj_ptr;
}
static void construct(
PyObject* obj_ptr,
boost::python::converter::rvalue_from_python_stage1_data* data)
{
void* storage = (
(boost::python::converter::rvalue_from_python_storage< A >*)
data)-> storage.bytes;
new (storage) A((int)PyInt_AsLong(obj_ptr));
data->convertible = storage;
}
};
void a_map_indexing_suite()
{
to_python_converter< A , AToPython >();
AFromPython();
class_< std::map<int, A> >("AMap")
.def(map_indexing_suite<std::map<int, A>, true >())
;
class_< B >("B")
.add_property("a", make_getter(&B::a, return_value_policy<return_by_value>()),
make_setter(&B::a, return_value_policy<return_by_value>()))
;
}

View File

@@ -51,7 +51,7 @@ tuple raw_func(tuple args, dict kw)
BOOST_PYTHON_MODULE(args_ext)
{
def("f", f, args("x", "y", "z")
def("f", f, (arg("x")=1, arg("y")=4.25, arg("z")="wow")
, "This is f's docstring"
);
@@ -72,23 +72,24 @@ BOOST_PYTHON_MODULE(args_ext)
.def("raw", raw_function(raw_func))
;
class_<X>("X", "This is X's docstring")
.def(init<int, optional<int> >(args("a0", "a1")))
class_<X>("X", "This is X's docstring", init<>(args("self")))
.def(init<int, optional<int> >(args("self", "a0", "a1")))
.def("f", &X::f
, "This is X.f's docstring"
, args("x", "y", "z"))
, args("self","x", "y", "z"))
// Just to prove that all the different argument combinations work
.def("inner0", &X::inner, return_internal_reference<>(), args("n"), "docstring")
.def("inner1", &X::inner, return_internal_reference<>(), "docstring", args("n"))
.def("inner0", &X::inner, return_internal_reference<>(), args("self", "n"), "docstring")
.def("inner1", &X::inner, return_internal_reference<>(), "docstring", args("self", "n"))
.def("inner2", &X::inner, args("n"), return_internal_reference<>(), "docstring")
.def("inner3", &X::inner, "docstring", return_internal_reference<>(), args("n"))
.def("inner2", &X::inner, args("self", "n"), return_internal_reference<>(), "docstring")
.def("inner3", &X::inner, "docstring", return_internal_reference<>(), args("self", "n"))
.def("inner4", &X::inner, args("n"), "docstring", return_internal_reference<>())
.def("inner5", &X::inner, "docstring", args("n"), return_internal_reference<>())
.def("inner4", &X::inner, args("self", "n"), "docstring", return_internal_reference<>())
.def("inner5", &X::inner, "docstring", args("self", "n"), return_internal_reference<>())
.def("f1", &X::f, X_f_overloads(args("x", "y", "z")))
.def("f1", &X::f, X_f_overloads(args("self", "x", "y", "z")))
.def("f2", &X::f, X_f_overloads(args("self", "x", "y", "z"), "f2's docstring"))
.def("f2", &X::f, X_f_overloads(args("x", "y", "z"), "f2's docstring"))
;

View File

@@ -84,22 +84,27 @@
(2, 4.25, 'wow')
>>> q.f1()
(1, 4.25, 'wow')
>>> q.f2.__doc__.splitlines()[1]
'f2( (X)self [, (int)x [, (float)y [, (str)z]]]) -> tuple :'
>>> X.f.__doc__.splitlines()[:2]
["This is X.f's docstring", 'C++ signature:']
>>> q.f2.__doc__.splitlines()[2]
" f2's docstring"
>>> X.f.__doc__.splitlines()[1:5]
['f( (X)self, (int)x, (float)y, (str)z) -> tuple :', " This is X.f's docstring", '', ' C++ signature :']
>>> xfuncs = (X.inner0, X.inner1, X.inner2, X.inner3, X.inner4, X.inner5)
>>> for f in xfuncs:
... print f(q,1).value(),
... print f(q, n = 1).value(),
... print f(q, n = 0).value(),
... print f.__doc__.splitlines()[:2]
1 1 0 ['docstring', 'C++ signature:']
1 1 0 ['docstring', 'C++ signature:']
1 1 0 ['docstring', 'C++ signature:']
1 1 0 ['docstring', 'C++ signature:']
1 1 0 ['docstring', 'C++ signature:']
1 1 0 ['docstring', 'C++ signature:']
... print f.__doc__.splitlines()[1:5]
1 1 0 ['inner0( (X)self, (bool)n) -> Y :', ' docstring', '', ' C++ signature :']
1 1 0 ['inner1( (X)self, (bool)n) -> Y :', ' docstring', '', ' C++ signature :']
1 1 0 ['inner2( (X)self, (bool)n) -> Y :', ' docstring', '', ' C++ signature :']
1 1 0 ['inner3( (X)self, (bool)n) -> Y :', ' docstring', '', ' C++ signature :']
1 1 0 ['inner4( (X)self, (bool)n) -> Y :', ' docstring', '', ' C++ signature :']
1 1 0 ['inner5( (X)self, (bool)n) -> Y :', ' docstring', '', ' C++ signature :']
>>> x = X(a1 = 44, a0 = 22)
>>> x.inner0(0).value()
@@ -134,49 +139,9 @@ if __name__ == '__main__':
import sys
status = run()[0]
if (status == 0): print "Done."
import args_ext
help(args_ext)
sys.exit(status)

View File

@@ -64,6 +64,24 @@
... except TypeError: pass
... else: print 'expected a TypeError exception'
>>> print look.__doc__.splitlines()[1]
look( (X)arg1) -> int :
>>> print steal.__doc__.splitlines()[1]
steal( (X)arg1) -> int :
>>> print maybe_steal.__doc__.splitlines()[1]
maybe_steal( (X)arg1, (bool)arg2) -> int :
>>> print make.__doc__.splitlines()[1]
make() -> X :
>>> print callback.__doc__.splitlines()[1]
callback( (object)arg1) -> X :
>>> print extract.__doc__.splitlines()[1]
extract( (object)arg1) -> X :
'''
def run(args = None):

View File

@@ -16,6 +16,9 @@
>>> assert y_identity(y) is y
>>> y_equality(y, y)
1
>>> print y_identity.__doc__.splitlines()[1]
y_identity( (Y)arg1) -> object :
'''
def run(args = None):

View File

@@ -12,6 +12,7 @@
#include <boost/python/reference_existing_object.hpp>
#include <boost/python/call.hpp>
#include <boost/python/object.hpp>
#define BOOST_ENABLE_ASSERT_HANDLER
#include <boost/assert.hpp>
using namespace boost::python;

View File

@@ -52,7 +52,7 @@ int Var::static1 = 0;
Y Var::static2(0);
// Compilability regression tests
namespace
namespace boost_python_test
{
struct trivial
{
@@ -86,6 +86,7 @@ namespace
BOOST_PYTHON_MODULE(data_members_ext)
{
using namespace boost_python_test;
class_<X>("X", init<int>())
.def("value", &X::value)
.def("set", &X::set)

View File

@@ -159,10 +159,10 @@ BOOST_PYTHON_MODULE(defaults_ext)
.def("get_state", &Y::get_state)
;
class_<X>("X")
class_<X>("X",no_init)
.def(init<int, optional<char, std::string, double> >("doc of init"))
.def(init<std::string, bool>()[default_call_policies()]) // what's a good policy here?
.def(init<optional<int, char, std::string, double> >("doc of init", args("self", "a", "b", "c", "d")))
.def(init<std::string, bool>(args("self", "s", "b"))[default_call_policies()]) // what's a good policy here?
.def("get_state", &X::get_state)
.def("bar", &X::bar, X_bar_stubs())
.def("bar2", &X::bar2, X_bar_stubs2("doc of X::bar2")[return_internal_reference<>()])

View File

@@ -113,28 +113,22 @@
... doc = obj.__doc__.splitlines()
... return "\\n".join(["|"+doc[i] for i in args])
>>> print selected_doc(X.__init__, 0, 2, 4, 6, 8, 9, 10, 12)
|C++ signature:
|C++ signature:
|C++ signature:
|C++ signature:
|
|doc of init
|C++ signature:
|C++ signature:
>>> print selected_doc(X.__init__, 1, 2, 4, 7, 9)
|__init__( (object)self [, (int)a [, (str)b [, (str)c [, (float)d]]]]) -> None :
| doc of init
| C++ signature :
|__init__( (object)self, (str)s, (bool)b) -> None :
| C++ signature :
>>> print selected_doc(Y.__init__, 0, 1)
|doc of Y init
|C++ signature:
>>> print selected_doc(Y.__init__, 1, 2, 4)
|__init__( (object)arg1) -> None :
| doc of Y init
| C++ signature :
>>> print selected_doc(X.bar2, 0, 2, 4, 6, 8, 9, 10)
|C++ signature:
|C++ signature:
|C++ signature:
|C++ signature:
|
|doc of X::bar2
|C++ signature:
>>> print selected_doc(X.bar2, 1, 2, 4)
|bar2( (X)arg1 [, (int)arg2 [, (str)arg3 [, (str)arg4 [, (float)arg5]]]]) -> Y :
| doc of X::bar2
| C++ signature :
"""
def run(args = None):

View File

@@ -43,55 +43,74 @@ BOOST_PYTHON_MODULE(docstring_ext)
, init<int>(
"this is the __init__ function\n"
"its documentation has two lines."
, args("self", "value")
)
)
.def("value", &X::value,
"gets the value of the object")
"gets the value of the object"
, args("self"))
.def( "value", &X::value,
"also gets the value of the object")
"also gets the value of the object"
, args("self"))
;
def("create", create, return_value_policy<manage_new_object>(),
"creates a new X object");
"creates a new X object", args("value"));
def("fact", fact, "compute the factorial");
def("fact", fact, "compute the factorial", args("n"));
{
docstring_options doc_options;
doc_options.disable_user_defined();
def("fact_usr_off_1", fact, "usr off 1");
def("fact_usr_off_1", fact, "usr off 1", args("n"));
doc_options.enable_user_defined();
def("fact_usr_on_1", fact, "usr on 1");
def("fact_usr_on_1", fact, "usr on 1", args("n"));
doc_options.disable_user_defined();
def("fact_usr_off_2", fact, "usr off 2");
def("fact_usr_off_2", fact, "usr off 2", args("n"));
}
def("fact_usr_on_2", fact, "usr on 2");
def("fact_usr_on_2", fact, "usr on 2", args("n"));
{
docstring_options doc_options(true, false);
def("fact_sig_off_1", fact, "sig off 1");
def("fact_sig_off_1", fact, "sig off 1", args("n"));
doc_options.enable_signatures();
def("fact_sig_on_1", fact, "sig on 1");
def("fact_sig_on_1", fact, "sig on 1", args("n"));
doc_options.disable_signatures();
def("fact_sig_off_2", fact, "sig off 2");
def("fact_sig_off_2", fact, "sig off 2", args("n"));
}
def("fact_sig_on_2", fact, "sig on 2");
def("fact_sig_on_2", fact, "sig on 2", args("n"));
{
docstring_options doc_options(false);
def("fact_usr_off_sig_off_1", fact, "usr off sig off 1");
def("fact_usr_off_sig_off_1", fact, "usr off sig off 1", args("n"));
{
docstring_options nested_doc_options;
def("fact_usr_on_sig_on_1", fact, "usr on sig on 1");
def("fact_usr_on_sig_on_1", fact, "usr on sig on 1", args("n"));
nested_doc_options.disable_all();
nested_doc_options.enable_user_defined();
def("fact_usr_on_sig_off_1", fact, "usr on sig off 1");
def("fact_usr_on_sig_off_1", fact, "usr on sig off 1", args("n"));
nested_doc_options.enable_all();
def("fact_usr_on_sig_on_2", fact, "usr on sig on 2");
def("fact_usr_on_sig_on_2", fact, "usr on sig on 2", args("n"));
}
def("fact_usr_off_sig_off_2", fact, "usr off sig off 2");
def("fact_usr_off_sig_off_2", fact, "usr off sig off 2", args("n"));
}
{
docstring_options doc_options(true);
doc_options.disable_cpp_signatures();
def("fact_usr_on_psig_on_csig_off_1", fact, "usr on psig on csig off 1", args("n"));
doc_options.enable_cpp_signatures();
doc_options.disable_py_signatures();
def("fact_usr_on_psig_off_csig_on_1", fact, "usr on psig off csig on 1", args("n"));
doc_options.enable_py_signatures();
doc_options.disable_user_defined();
doc_options.disable_cpp_signatures();
def("fact_usr_off_psig_on_csig_off_1", fact, "usr off psig on csig off 1", args("n"));
doc_options.enable_cpp_signatures();
doc_options.disable_py_signatures();
def("fact_usr_off_psig_off_csig_on_1", fact, "usr off psig off csig on 1", args("n"));
}
}
#include "module_tail.cpp"

View File

@@ -8,82 +8,114 @@
... doc = obj.__doc__.splitlines()
... return "\\n".join(["|"+doc[i] for i in args])
>>> print selected_doc(X.__init__, 0, 1, 2)
|this is the __init__ function
|its documentation has two lines.
|C++ signature:
>>> print selected_doc(X.value, 0, 1, 3, 4, 5)
|gets the value of the object
|C++ signature:
>>> print selected_doc(X.__init__, 1, 2, 3, 4, 5)
|__init__( (object)self, (int)value) -> None :
| this is the __init__ function
| its documentation has two lines.
|
|also gets the value of the object
|C++ signature:
| C++ signature :
>>> print selected_doc(create, 0, 1)
|creates a new X object
|C++ signature:
>>> print selected_doc(X.value, 1, 2, 4, 7, 8, 10)
|value( (X)self) -> int :
| gets the value of the object
| C++ signature :
|value( (X)self) -> int :
| also gets the value of the object
| C++ signature :
>>> print selected_doc(fact, 0, 1)
|compute the factorial
|C++ signature:
>>> print selected_doc(create, 1, 2, 3, 4)
|create( (int)value) -> X :
| creates a new X object
|
| C++ signature :
>>> print selected_doc(fact, 1, 2, 3, 4)
|fact( (int)n) -> int :
| compute the factorial
|
| C++ signature :
>>> len(fact_usr_off_1.__doc__.splitlines())
2
>>> print selected_doc(fact_usr_off_1, 0)
|C++ signature:
5
>>> print selected_doc(fact_usr_off_1, 1, 3)
|fact_usr_off_1( (int)n) -> int :
| C++ signature :
>>> len(fact_usr_on_1.__doc__.splitlines())
3
>>> print selected_doc(fact_usr_on_1, 0, 1)
|usr on 1
|C++ signature:
6
>>> print selected_doc(fact_usr_on_1, 1, 2, 4)
|fact_usr_on_1( (int)n) -> int :
| usr on 1
| C++ signature :
>>> len(fact_usr_off_2.__doc__.splitlines())
2
>>> print selected_doc(fact_usr_off_2, 0)
|C++ signature:
5
>>> print selected_doc(fact_usr_off_2, 1, 3)
|fact_usr_off_2( (int)n) -> int :
| C++ signature :
>>> len(fact_usr_on_2.__doc__.splitlines())
3
>>> print selected_doc(fact_usr_on_2, 0, 1)
|usr on 2
|C++ signature:
6
>>> print selected_doc(fact_usr_on_2, 1, 2, 4)
|fact_usr_on_2( (int)n) -> int :
| usr on 2
| C++ signature :
>>> len(fact_sig_off_1.__doc__.splitlines())
1
>>> print selected_doc(fact_sig_off_1, 0)
2
>>> print selected_doc(fact_sig_off_1, 1)
|sig off 1
>>> len(fact_sig_on_1.__doc__.splitlines())
3
>>> print selected_doc(fact_sig_on_1, 0, 1)
|sig on 1
|C++ signature:
6
>>> print selected_doc(fact_sig_on_1, 1, 2, 4)
|fact_sig_on_1( (int)n) -> int :
| sig on 1
| C++ signature :
>>> len(fact_sig_off_2.__doc__.splitlines())
1
>>> print selected_doc(fact_sig_off_2, 0)
2
>>> print selected_doc(fact_sig_off_2, 1)
|sig off 2
>>> len(fact_sig_on_2.__doc__.splitlines())
3
>>> print selected_doc(fact_sig_on_2, 0, 1)
|sig on 2
|C++ signature:
6
>>> print selected_doc(fact_sig_on_2, 1, 2, 4)
|fact_sig_on_2( (int)n) -> int :
| sig on 2
| C++ signature :
>>> print fact_usr_off_sig_off_1.__doc__
None
>>> len(fact_usr_on_sig_on_1.__doc__.splitlines())
3
>>> print selected_doc(fact_usr_on_sig_on_1, 0, 1)
|usr on sig on 1
|C++ signature:
6
>>> print selected_doc(fact_usr_on_sig_on_1, 1, 2, 4)
|fact_usr_on_sig_on_1( (int)n) -> int :
| usr on sig on 1
| C++ signature :
>>> len(fact_usr_on_sig_off_1.__doc__.splitlines())
1
>>> print selected_doc(fact_usr_on_sig_off_1, 0)
2
>>> print selected_doc(fact_usr_on_sig_off_1, 1)
|usr on sig off 1
>>> len(fact_usr_on_sig_on_2.__doc__.splitlines())
3
>>> print selected_doc(fact_usr_on_sig_on_2, 0, 1)
|usr on sig on 2
|C++ signature:
>>> print fact_usr_off_sig_off_2.__doc__
None
6
>>> print selected_doc(fact_usr_on_sig_on_2, 1, 2, 4)
|fact_usr_on_sig_on_2( (int)n) -> int :
| usr on sig on 2
| C++ signature :
>>> print selected_doc(fact_usr_on_psig_on_csig_off_1, 1, 2)
|fact_usr_on_psig_on_csig_off_1( (int)n) -> int :
| usr on psig on csig off 1
>>> print selected_doc(fact_usr_on_psig_off_csig_on_1, 1, 3)
|usr on psig off csig on 1
|C++ signature :
>>> print fact_usr_off_psig_on_csig_off_1.__doc__.splitlines()[1]
fact_usr_off_psig_on_csig_off_1( (int)n) -> int
>>> print selected_doc(fact_usr_off_psig_off_csig_on_1,1)
|C++ signature :
'''

View File

@@ -48,14 +48,27 @@ enum_ext.color.red
enum_ext.color.green
'''
# pickling of enums only works with Python 2.3 or higher
exercise_pickling = '''
>>> import pickle
>>> p = pickle.dumps(color.green, pickle.HIGHEST_PROTOCOL)
>>> l = pickle.loads(p)
>>> identity(l)
enum_ext.color.green
'''
def run(args = None):
import sys
import doctest
import pickle
if args is not None:
sys.argv = args
return doctest.testmod(sys.modules.get(__name__))
self = sys.modules.get(__name__)
if (hasattr(pickle, "HIGHEST_PROTOCOL")):
self.__doc__ += exercise_pickling
return doctest.testmod(self)
if __name__ == '__main__':
print "running..."
import sys

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