mirror of
https://github.com/boostorg/python.git
synced 2026-01-24 18:12:43 +00:00
131 lines
3.7 KiB
HTML
131 lines
3.7 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
|
<link rel="stylesheet" type="text/css" href="../boost.css">
|
|
|
|
<title>Boost.Python - <boost/python/manage_new_object.hpp></title>
|
|
|
|
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
|
|
"header">
|
|
<tr>
|
|
<td valign="top" width="300">
|
|
<h3><a href="../../../../index.htm"><img height="86" width="277" alt=
|
|
"C++ Boost" src="../../../../c++boost.gif" border="0"></a></h3>
|
|
|
|
<td valign="top">
|
|
<h1 align="center">Boost.Python</h1>
|
|
|
|
<h2 align="center">Header
|
|
<boost/python/manage_new_object.hpp></h2>
|
|
</table>
|
|
<hr>
|
|
|
|
<h2>Contents</h2>
|
|
|
|
<dl class="page-index">
|
|
<dt><a href="#classes">Classes</a>
|
|
|
|
<dd>
|
|
<dl class="page-index">
|
|
<dt><a href="#manage_new_object-spec">Class
|
|
<code>manage_new_object</code></a>
|
|
|
|
<dd>
|
|
<dl class="page-index">
|
|
<dt><a href="#manage_new_object-spec-synopsis">Class
|
|
<code>manage_new_object</code> synopsis</a>
|
|
|
|
<dt><a href="#manage_new_object-spec-metafunctions">Class
|
|
<code>manage_new_object</code> metafunctions</a>
|
|
</dl>
|
|
</dl>
|
|
|
|
<dt><a href="#examples">Example</a>
|
|
</dl>
|
|
<hr>
|
|
|
|
<h2><a name="classes"></a>Classes</h2>
|
|
|
|
<h3><a name="manage_new_object-spec"></a>Class
|
|
<code>manage_new_object</code></h3>
|
|
|
|
<p><code>manage_new_object</code> is a model of <a href=
|
|
"ResultConverter.html#ResultConverterGenerator-concept">ResultConverterGenerator</a> which can be
|
|
used to wrap C++ functions which return a pointer to an object allocated
|
|
with a <i>new-expression</i>, and expect the caller to take responsibility
|
|
for deleting that object.
|
|
|
|
<h4><a name="manage_new_object-spec-synopsis"></a>Class
|
|
<code>manage_new_object</code> synopsis</h4>
|
|
<pre>
|
|
namespace boost { namespace python
|
|
{
|
|
struct manage_new_object
|
|
{
|
|
template <class T> struct apply;
|
|
};
|
|
}}
|
|
</pre>
|
|
|
|
<h4><a name="manage_new_object-spec-metafunctions"></a>Class
|
|
<code>manage_new_object</code> metafunctions</h4>
|
|
<pre>
|
|
template <class T> struct apply
|
|
</pre>
|
|
|
|
<dl class="metafunction-semantics">
|
|
<dt><b>Requires:</b> <code>T</code> is <code>U*</code> for some
|
|
<code>U</code>.
|
|
|
|
<dt><b>Returns:</b> <code>typedef <a href=
|
|
"to_python_indirect.html#to_python_indirect-spec">to_python_indirect</a><T>
|
|
type;</code>
|
|
</dl>
|
|
|
|
<h2><a name="examples"></a>Example</h2>
|
|
|
|
<p>In C++:
|
|
<pre>
|
|
#include <boost/python/module.hpp>
|
|
#include <boost/python/class.hpp>
|
|
#include <boost/python/manage_new_object.hpp>
|
|
#include <boost/python/return_value_policy.hpp>
|
|
|
|
|
|
struct Foo {
|
|
Foo(int x) : x(x){}
|
|
int get_x() { return x; }
|
|
int x;
|
|
};
|
|
|
|
Foo* make_foo(int x) { return new Foo(x); }
|
|
|
|
// Wrapper code
|
|
using namespace boost::python;
|
|
BOOST_PYTHON_MODULE_INIT(my_module)
|
|
{
|
|
module("my_module")
|
|
.def("make_foo", make_foo, return_value_policy<manage_new_object>)
|
|
.add(
|
|
class_<Foo>()
|
|
.def("get_x", &Foo::get_x)
|
|
)
|
|
}
|
|
</pre>
|
|
In Python:
|
|
<pre>
|
|
>>> from my_module import *
|
|
>>> f = make_foo(3) # create a Foo object
|
|
>>> f.get_x()
|
|
3
|
|
</pre>
|
|
|
|
<p>Revised
|
|
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
|
|
14 February 2002 <!--webbot bot="Timestamp" endspan i-checksum="39359" -->
|
|
|
|
|
|
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
|
Abrahams</a> 2002. All Rights Reserved.</i>
|
|
|