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[SVN r15557]
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Dave Abrahams
2002-09-29 19:15:53 +00:00
parent 0d1efb61e2
commit d873aec9e6
3 changed files with 118 additions and 104 deletions
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2
doc/v2/call_method.html
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@@ -121,7 +121,7 @@ class Base_callback : public Base
using namespace boost::python;
BOOST_PYTHON_MODULE_INIT(my_module)
{
def("is_base", is_base)
def("is_base", is_base);
class_<Base,Base_callback, noncopyable>("Base")
.def("class_name", &Base_callback::Base_name)

4
doc/v2/implicit.html
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@@ -123,8 +123,8 @@ X make_x(int n) { return X(n); }
BOOST_PYTHON_MODULE_INIT(implicit_ext)
{
def("x_value", x_value)
def("make_x", make_x)
def("x_value", x_value);
def("make_x", make_x);
class_<X>("X",
init<int>())

216
doc/v2/lvalue_from_pytype.html
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@@ -1,128 +1,145 @@
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<h3><a href="../../../../index.htm"><img height="86" width="277" alt=
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<h1 align="center">Boost.Python</h1>
<h2 align="center">Header &lt;boost/python/lvalue_from_pytype.hpp&gt;</h2>
<h2 align="center">Header
&lt;boost/python/lvalue_from_pytype.hpp&gt;</h2>
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<hr>
<h2>Contents</h2>
<dl class="page-index">
<dt><a href="#introduction">Introduction</a>
<dt><a href="#introduction">Introduction</a></dt>
<dt><a href="#classes">Classes</a>
<dt><a href="#classes">Classes</a></dt>
<dd>
<dl class="page-index">
<dt><a href="#lvalue_from_pytype-spec">Class Template <code>lvalue_from_pytype</code></a>
<dt><a href="#lvalue_from_pytype-spec">Class Template
<code>lvalue_from_pytype</code></a></dt>
<dd>
<dl class="page-index">
<dt><a href="#lvalue_from_pytype-spec-synopsis">Class Template
<code>lvalue_from_pytype</code> synopsis</a>
<code>lvalue_from_pytype</code> synopsis</a></dt>
<dt><a href="#lvalue_from_pytype-spec-ctors">Class Template
<code>lvalue_from_pytype</code> constructor</a>
<code>lvalue_from_pytype</code> constructor</a></dt>
</dl>
</dd>
</dl>
<dl class="page-index">
<dt><a href="#extract_identity-spec">Class Template <code>extract_identity</code></a>
<dt><a href="#extract_identity-spec">Class Template
<code>extract_identity</code></a></dt>
<dd>
<dl class="page-index">
<dt><a href="#extract_identity-spec-synopsis">Class Template
<code>extract_identity</code> synopsis</a>
<code>extract_identity</code> synopsis</a></dt>
<dt><a href="#extract_identity-spec-statics">Class Template
<code>extract_identity</code> static functions</a>
<code>extract_identity</code> static functions</a></dt>
</dl>
<dt><a href="#extract_member-spec">Class Template <code>extract_member</code></a>
</dd>
<dt><a href="#extract_member-spec">Class Template
<code>extract_member</code></a></dt>
<dd>
<dl class="page-index">
<dt><a href="#extract_member-spec-synopsis">Class Template
<code>extract_member</code> synopsis</a>
<code>extract_member</code> synopsis</a></dt>
<dt><a href="#extract_member-spec-statics">Class Template
<code>extract_member</code> static functions</a>
<code>extract_member</code> static functions</a></dt>
</dl>
</dd>
</dl>
</dd>
<dt><a href="#examples">Example</a>
<dt><a href="#examples">Example</a></dt>
</dl>
<hr>
<h2><a name="introduction"></a>Introduction</h2>
<code>&lt;boost/python/lvalue_from_pytype.hpp&gt;</code> supplies
a facility for extracting C++ objects from within Python instances
of a given type. This is typically useful for dealing with
&quot;traditional&quot; Python extension types.
<code>&lt;boost/python/lvalue_from_pytype.hpp&gt;</code> supplies a
facility for extracting C++ objects from within Python instances of a
given type. This is typically useful for dealing with "traditional"
Python extension types.
<h2><a name="classes"></a>Classes</h2>
<h3><a name="lvalue_from_pytype-spec"></a>Class template <code>lvalue_from_pytype</code></h3>
<h3><a name="lvalue_from_pytype-spec"></a>Class template
<code>lvalue_from_pytype</code></h3>
<p>Class template <code>lvalue_from_pytype</code> will register
from_python converters which, given an object of the given Python
type, can extract references and pointers to a particular C++
type. Its template arguments are:
<p>
from_python converters which, given an object of the given Python type,
can extract references and pointers to a particular C++ type. Its
template arguments are:</p>
<table border="1" summary="lvalue_from_pytype template parameters">
<caption>
<b><code>lvalue_from_pytype</code> Requirements</b><br>
In the table below, <b><code>x</code></b> denotes an object of type <code>PythonObject&amp;</code>
In the table below, <b><code>x</code></b> denotes an object of type
<code>PythonObject&amp;</code>
</caption>
<tr>
<th>Parameter
<th>Requirements
<th>Semantics
<tr>
<td><code>Extractor</code>
<th>Parameter</th>
<td>a model of <a
href="Extractor.html#Extractor-concept">Extractor</a> whose
execute function returns a reference type.
<th>Requirements</th>
<td>Extracts the lvalue from the Python object once its type has been confirmed
<th>Semantics</th>
</tr>
<tr>
<td><code>python_type</code>
<td><code>Extractor</code></td>
<td>A compile-time constant <code><a
href="http://www.python.org/doc/2.2/ext/dnt-type-methods.html">PyTypeObject</a>*</code>
<td>a model of <a href=
"Extractor.html#Extractor-concept">Extractor</a> whose execute
function returns a reference type.</td>
<td>The Python type of instances convertible by this
converter. Python subtypes are also convertible.
<td>Extracts the lvalue from the Python object once its type has been
confirmed</td>
</tr>
<tr>
<td><code>python_type</code></td>
<td>A compile-time constant <code><a href=
"http://www.python.org/doc/2.2/ext/dnt-type-methods.html">PyTypeObject</a>*</code></td>
<td>The Python type of instances convertible by this converter.
Python subtypes are also convertible.</td>
</tr>
</table>
<h4><a name="lvalue_from_pytype-spec-synopsis"></a>Class template <code>lvalue_from_pytype</code> synopsis</h4>
<h4><a name="lvalue_from_pytype-spec-synopsis"></a>Class template
<code>lvalue_from_pytype</code> synopsis</h4>
<pre>
namespace boost { namespace python
{
@@ -134,25 +151,25 @@ namespace boost { namespace python
}}
</pre>
<h4><a name="lvalue_from_pytype-spec-ctors"></a>Class template <code>lvalue_from_pytype</code> constructor</h4>
<h4><a name="lvalue_from_pytype-spec-ctors"></a>Class template
<code>lvalue_from_pytype</code> constructor</h4>
<pre>
lvalue_from_pytype();
</pre>
<dl class="function-semantics">
<dt><b>Effects:</b> Registers converters which can convert
Python objects of the given type to lvalues of the type returned
by <code>Extractor::execute</code>.
<dt><b>Effects:</b> Registers converters which can convert Python
objects of the given type to lvalues of the type returned by
<code>Extractor::execute</code>.</dt>
</dl>
<h3><a name="extract_identity-spec"></a>Class template <code>extract_identity</code></h3>
<h3><a name="extract_identity-spec"></a>Class template
<code>extract_identity</code></h3>
<p><code>extract_identity</code> is a model of <a
href="Extractor.html#Extractor-concept">Extractor</a> which can be
used in the common case where the C++ type to be extracted is the
same as the Python object type.
<p><code>extract_identity</code> is a model of <a href=
"Extractor.html#Extractor-concept">Extractor</a> which can be used in the
common case where the C++ type to be extracted is the same as the Python
object type.</p>
<h4><a name="extract_identity-spec-synopsis"></a>Class template
<code>extract_identity</code> synopsis</h4>
@@ -167,26 +184,26 @@ namespace boost { namespace python
}}
</pre>
<h4><a name="extract_identity-spec-statics"></a>Class template <code>extract_identity</code> static functions</h4>
<h4><a name="extract_identity-spec-statics"></a>Class template
<code>extract_identity</code> static functions</h4>
<pre>
InstanceType&amp; execute(InstanceType&amp; c);
</pre>
<dl class="function-semantics">
<dt><b>Returns:</b> <code>c</code>
<dt><b>Returns:</b> <code>c</code></dt>
</dl>
<h3><a name="extract_member-spec"></a>Class template
<code>extract_member</code></h3>
<h3><a name="extract_member-spec"></a>Class template <code>extract_member</code></h3>
<p><code>extract_member</code> is a model of <a href=
"Extractor.html#Extractor-concept">Extractor</a> which can be used in the
common case in the common case where the C++ type to be extracted is a
member of the Python object.</p>
<p><code>extract_member</code> is a model of <a
href="Extractor.html#Extractor-concept">Extractor</a> which can be
used in the common case in the common case where the C++
type to be extracted is a member of the Python object.
<h4><a name="extract_member-spec-synopsis"></a>Class template <code>extract_member</code> synopsis</h4>
<h4><a name="extract_member-spec-synopsis"></a>Class template
<code>extract_member</code> synopsis</h4>
<pre>
namespace boost { namespace python
{
@@ -198,34 +215,31 @@ namespace boost { namespace python
}}
</pre>
<h4><a name="extract_member-spec-statics"></a>Class template <code>extract_member</code> static functions</h4>
<h4><a name="extract_member-spec-statics"></a>Class template
<code>extract_member</code> static functions</h4>
<pre>
static MemberType&amp; execute(InstanceType&amp; c);
</pre>
<dl class="function-semantics">
<dt><b>Returns:</b> <code>c.*member</code>
<dt><b>Returns:</b> <code>c.*member</code></dt>
</dl>
<h2><a name="examples"></a>Example</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 we want to build a module
which manipulates <code>Noddy</code>s. Since
<code>noddy_NoddyObject</code> is so simple that it carries no
interesting information, the example is a bit contrived: it assumes you
want to keep track of one particular object for some reason. This module
would have to be dynamically linked to the module which defines
<code>noddy_NoddyType</code>.
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 we want to build
a module which manipulates <code>Noddy</code>s. Since
<code>noddy_NoddyObject</code> is so simple that it carries no
interesting information, the example is a bit contrived: it assumes
you want to keep track of one particular object for some reason. This
module would have to be dynamically linked to the module which defines
<code>noddy_NoddyType</code>.
<h3>C++ module definition</h3>
<h3>C++ module definition</h3>
<pre>
#include &lt;boost/python/reference.hpp&gt;
#include &lt;boost/python/module.hpp&gt;
#include &lt;boost/python/module_init.hpp&gt;
// definition lifted from the Python docs
typedef struct {
@@ -247,18 +261,15 @@ void set_cache(noddy_NoddyObject* x)
BOOST_PYTHON_MODULE_INIT(noddy_cache)
{
module noddy_cache(&quot;noddy_cache&quot;)
.def(&quot;is_cached&quot;, is_cached)
.def(&quot;set_cache&quot;, set_cache)
;
def("is_cached", is_cached);
def("set_cache", set_cache);
// register Noddy lvalue converter
lvalue_from_pytype&lt;extract_identity&lt;noddy_NoddyObject&gt;,&amp;noddy_NoddyType&gt;();
}
</pre>
<h3>Python code</h3>
<h3>Python code</h3>
<pre>
&gt;&gt;&gt; import noddy
&gt;&gt;&gt; n = noddy.new_noddy()
@@ -274,10 +285,13 @@ BOOST_PYTHON_MODULE_INIT(noddy_cache)
<p>Revised
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
05 November, 2001
29 September, 2001
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
</p>
<p><i>&copy; Copyright <a href="../../../../people/dave_abrahams.htm">Dave
Abrahams</a> 2002. All Rights Reserved.</i>
<p><i>&copy; Copyright <a href=
"../../../../people/dave_abrahams.htm">Dave Abrahams</a> 2002. All Rights
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