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922 lines
26 KiB
HTML
Executable File
922 lines
26 KiB
HTML
Executable File
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<!-- Software License, Version 1.0. (See accompanying -->
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<html>
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<head>
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<meta name="generator" content=
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"HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<link rel="stylesheet" type="text/css" href="../boost.css">
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<title>Boost.Python - <boost/python/operators.hpp></title>
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</head>
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<body>
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<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
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"header">
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<tr>
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<td valign="top" width="300">
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<h3><a href="../../../../index.htm"><img height="86" width="277"
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alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
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</td>
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<td valign="top">
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<h1 align="center"><a href="../index.html">Boost.Python</a></h1>
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<h2 align="center">Header <boost/python/operators.hpp></h2>
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</td>
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</tr>
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</table>
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<hr>
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<h2>Contents</h2>
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<dl class="page-index">
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<dt><a href="#introduction">Introduction</a></dt>
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<dt><a href="#classes">Classes</a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#self_t-spec">Class
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<code>self_ns::self_t</code></a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#self_t-spec-synopsis">Class <code>self_t</code>
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synopsis</a></dt>
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<dt><a href="#self_t-spec-inplace">Class <code>self_t</code>
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inplace operators</a></dt>
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<dt><a href="#self_t-spec-comparisons">Class
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<code>self_t</code> comparison functions</a></dt>
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<dt><a href="#self_t-spec-ops">Class <code>self_t</code>
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non-member operations</a></dt>
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<dt><a href="#self_t-spec-value-unary-ops">Class
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<code>self_t</code> unary operations</a></dt>
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<dt><a href="#self_t-spec-value-ops">Class
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<code>self_t</code> value operations</a></dt>
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</dl>
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</dd>
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<dt><a href="#other-spec">Class template
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<code>other</code></a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#other-spec-synopsis">Class <code>other</code>
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synopsis</a></dt>
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</dl>
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</dd>
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<dt><a href="#operator_-spec">Class template
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<code>operator_</code></a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#operator_-spec-synopsis">Class
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<code>operator_</code> synopsis</a></dt>
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</dl>
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</dd>
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</dl>
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</dd>
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<dt><a href="#objects">Objects</a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#self-spec">self</a></dt>
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</dl>
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</dd>
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<dt><a href="#examples">Examples</a></dt>
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</dl>
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<hr>
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<h2><a name="introduction"></a>Introduction</h2>
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<p><code><boost/python/operators.hpp></code> provides types and
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functions for automatically generating Python <a href=
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"http://www.python.org/doc/ref/specialnames.html">special methods</a>
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from the corresponding C++ constructs. Most of these constructs are
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operator expressions, hence the name. To use the facility, substitute the
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<code><a href="#self-spec">self</a></code> object for an object of the
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class type being wrapped in the expression to be exposed, and pass the
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result to <a href=
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"class.html#class_-spec-modifiers">class_<>::def()</a>. Much of
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what is exposed in this header should be considered part of the
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implementation, so is not documented in detail here.</p>
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<h2><a name="classes"></a>Classes</h2>
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<h3><a name="self_t-spec"></a>Class <code>self_ns::self_t</code></h3>
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<p><code>self_ns::self_t</code> is the actual type of the <a href=
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"#self-spec"><code>self</code></a> object. The library isolates
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<code>self_t</code> in its own namespace, <code>self_ns</code>, in order
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to prevent the generalized operator templates which operate on it from
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being found by argument-dependent lookup in other contexts. This should
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be considered an implementation detail, since users should never have to
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mention <code>self_t</code> directly.</p>
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<h4><a name="self_t-spec-synopsis"></a>Class <code>self_ns::self_t</code>
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synopsis</h4>
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<pre>
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namespace boost { namespace python { namespace self_ns {
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{
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<i>unspecified-type-declaration</i> self_t;
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// inplace operators
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator+=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator-=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator*=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator/=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator%=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator>>=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator<<=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator&=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator^=(self_t, T);
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template <class T> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator|=(self_t, T);
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// comparisons
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator==(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator!=(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator<(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator>(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator<=(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator>=(L const&, R const&);
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// non-member operations
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator+(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator-(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator*(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator/(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator%(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator>>(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator<<(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator&(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator^(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator|(L const&, R const&);
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template <class L, class R> <a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> pow(L const&, R const&);
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// unary operations
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator-(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator+(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator~(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> operator!(self_t);
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// value operations
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> int_(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> long_(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> float_(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> complex_(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> str(self_t);
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<a href=
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"#operator_-spec">operator_</a><<i>unspecified</i>> repr(self_t);
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}}};
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</pre>
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The tables below describe the methods generated when the results of the
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expressions described are passed as arguments to <a href=
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"class.html#class_-spec-modifiers">class_<>::def()</a>.
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<code><b>x</b></code> is an object of the class type being wrapped.
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<h4><a name="self_t-spec-inplace"></a>Class <code>self_t</code> inplace
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operators</h4>
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In the table below, If <code><b>r</b></code> is an object of type
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<code><a href="#other-spec">other</a><T></code>,
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<code><b>y</b></code> is an object of type <code>T</code>; otherwise,
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<code><b>y</b></code> is an object of the same type as
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<code><b>r</b></code>.
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<table border="1" summary="self_t inplace operators">
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<tr>
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<th>C++ Expression</th>
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<th>Python Method Name</th>
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<th>C++ Implementation</th>
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</tr>
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<tr>
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<td><code>self += r</code></td>
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<td><code>__iadd__</code></td>
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<td><code>x += y</code></td>
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</tr>
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<tr>
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<td><code>self -= r</code></td>
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<td><code>__isub__</code></td>
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<td><code>x -= y</code></td>
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</tr>
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<tr>
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<td><code>self *= r</code></td>
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<td><code>__imul__</code></td>
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<td><code>x *= y</code></td>
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</tr>
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<tr>
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<td><code>self /= r</code></td>
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<td><code>__idiv__</code></td>
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<td><code>x /= y</code></td>
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</tr>
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<tr>
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<td><code>self %= r</code></td>
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<td><code>__imod__</code></td>
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<td><code>x %= y</code></td>
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</tr>
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<tr>
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<td><code>self >>= r</code></td>
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<td><code>__irshift__</code></td>
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<td><code>x >>= y</code></td>
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</tr>
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<tr>
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<td><code>self <<= r</code></td>
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<td><code>__ilshift__</code></td>
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<td><code>x <<= y</code></td>
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</tr>
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<tr>
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<td><code>self &= r</code></td>
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<td><code>__iand__</code></td>
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<td><code>x &= y</code></td>
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</tr>
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<tr>
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<td><code>self ^= r</code></td>
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<td><code>__ixor__</code></td>
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<td><code>x ^= y</code></td>
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</tr>
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<tr>
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<td><code>self |= r</code></td>
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<td><code>__ior__</code></td>
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<td><code>x |= y</code></td>
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</tr>
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</table>
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<h4><a name="self_t-spec-comparisons"></a>Class <code>self_t</code>
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comparison functions</h4>
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In the tables below, if <code><b>r</b></code> is of type <code><a href=
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"#self_t-spec">self_t</a></code>, <code><b>y</b></code> is an object of
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the same type as <code>x</code>; <br>
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if <code><b>l</b></code> or <code><b>r</b></code> is an object of type
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<code><a href="#other-spec">other</a><T></code>,
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<code><b>y</b></code> is an object of type <code>T</code>; <br>
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otherwise, <code><b>y</b></code> is an object of the same type as
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<code><b>l</b></code> or <code><b>r</b></code>.<br>
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<code><b>l</b></code> is never of type <code><a href=
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"#self_t-spec">self_t</a></code>.
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<p>The column of <b>Python Expressions</b> illustrates the expressions
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that will be supported in Python for objects convertible to the types of
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<code>x</code> and <code>y</code>. The secondary operation arises due to
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Python's <a href=
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"http://www.python.org/doc/ref/customization.html#l2h-89">reflection
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rules</a> for rich comparison operators, and are only used when the
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corresponding operation is not defined as a method of the <code>y</code>
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object.</p>
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<table border="1" summary="self_t comparison functions">
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<tr>
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<th>C++ Expression</th>
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<th>Python Method Name</th>
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<th>C++ Implementation</th>
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<th>Python Expressions<br>
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(primary, secondary)</th>
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</tr>
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<tr>
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<td><code>self == r</code></td>
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<td><code>__eq__</code></td>
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<td><code>x == y</code></td>
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<td><code>x == y, y == x</code></td>
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</tr>
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<tr>
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<td><code>l == self</code></td>
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<td><code>__eq__</code></td>
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<td><code>y == x</code></td>
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<td><code>y == x, x == y</code></td>
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</tr>
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<tr>
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<td><code>self != r</code></td>
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<td><code>__ne__</code></td>
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<td><code>x != y</code></td>
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<td><code>x != y, y != x</code></td>
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</tr>
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<tr>
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<td><code>l != self</code></td>
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<td><code>__ne__</code></td>
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<td><code>y != x</code></td>
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<td><code>y != x, x != y</code></td>
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</tr>
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<tr>
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<td><code>self < r</code></td>
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<td><code>__lt__</code></td>
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<td><code>x < y</code></td>
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<td><code>x < y, y > x</code></td>
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</tr>
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<tr>
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<td><code>l < self</code></td>
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<td><code>__gt__</code></td>
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<td><code>y < x</code></td>
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<td><code>y > x, x < y</code></td>
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</tr>
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<tr>
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<td><code>self > r</code></td>
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<td><code>__gt__</code></td>
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<td><code>x > y</code></td>
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<td><code>x > y, y < x</code></td>
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</tr>
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<tr>
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<td><code>l > self</code></td>
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<td><code>__lt__</code></td>
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<td><code>y > x</code></td>
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<td><code>y < x, x > y</code></td>
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</tr>
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<tr>
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<td><code>self <= r</code></td>
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<td><code>__le__</code></td>
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<td><code>x <= y</code></td>
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<td><code>x <= y, y >= x</code></td>
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</tr>
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<tr>
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<td><code>l <= self</code></td>
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<td><code>__ge__</code></td>
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<td><code>y <= x</code></td>
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<td><code>y >= x, x <= y</code></td>
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</tr>
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|
<tr>
|
|
<td><code>self >= r</code></td>
|
|
|
|
<td><code>__ge__</code></td>
|
|
|
|
<td><code>x >= y</code></td>
|
|
|
|
<td><code>x >= y, y <= x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l >= self</code></td>
|
|
|
|
<td><code>__le__</code></td>
|
|
|
|
<td><code>y >= x</code></td>
|
|
|
|
<td><code>y <= x, x >= y</code></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h4><a name="self_t-spec-ops"></a>Class <code>self_t</code> non-member
|
|
operations</h4>
|
|
The operations whose names begin with "<code>__r</code>" below will only
|
|
be called if the left-hand operand does not already support the given
|
|
operation, as described <a href=
|
|
"http://www.python.org/doc/current/ref/numeric-types.html#l2h-152">here</a>.
|
|
|
|
|
|
<table border="1" summary="self_t non-member operations">
|
|
<tr>
|
|
<th>C++ Expression</th>
|
|
|
|
<th>Python Method Name</th>
|
|
|
|
<th>C++ Implementation</th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self + r</code></td>
|
|
|
|
<td><code>__add__</code></td>
|
|
|
|
<td><code>x + y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l + self</code></td>
|
|
|
|
<td><code>__radd__</code></td>
|
|
|
|
<td><code>y + x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self - r</code></td>
|
|
|
|
<td><code>__sub__</code></td>
|
|
|
|
<td><code>x - y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l - self</code></td>
|
|
|
|
<td><code>__rsub__</code></td>
|
|
|
|
<td><code>y - x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self * r</code></td>
|
|
|
|
<td><code>__mul__</code></td>
|
|
|
|
<td><code>x * y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l * self</code></td>
|
|
|
|
<td><code>__rmul__</code></td>
|
|
|
|
<td><code>y * x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self / r</code></td>
|
|
|
|
<td><code>__div__</code></td>
|
|
|
|
<td><code>x / y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l / self</code></td>
|
|
|
|
<td><code>__rdiv__</code></td>
|
|
|
|
<td><code>y / x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self % r</code></td>
|
|
|
|
<td><code>__mod__</code></td>
|
|
|
|
<td><code>x % y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l % self</code></td>
|
|
|
|
<td><code>__rmod__</code></td>
|
|
|
|
<td><code>y % x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self >> r</code></td>
|
|
|
|
<td><code>__rshift__</code></td>
|
|
|
|
<td><code>x >> y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l >> self</code></td>
|
|
|
|
<td><code>__rrshift__</code></td>
|
|
|
|
<td><code>y >> x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self << r</code></td>
|
|
|
|
<td><code>__lshift__</code></td>
|
|
|
|
<td><code>x << y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l << self</code></td>
|
|
|
|
<td><code>__rlshift__</code></td>
|
|
|
|
<td><code>y << x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self & r</code></td>
|
|
|
|
<td><code>__and__</code></td>
|
|
|
|
<td><code>x & y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l & self</code></td>
|
|
|
|
<td><code>__rand__</code></td>
|
|
|
|
<td><code>y & x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self ^ r</code></td>
|
|
|
|
<td><code>__xor__</code></td>
|
|
|
|
<td><code>x ^ y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l ^ self</code></td>
|
|
|
|
<td><code>__rxor__</code></td>
|
|
|
|
<td><code>y ^ x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>self | r</code></td>
|
|
|
|
<td><code>__or__</code></td>
|
|
|
|
<td><code>x | y</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>l | self</code></td>
|
|
|
|
<td><code>__ror__</code></td>
|
|
|
|
<td><code>y | x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>pow(self, r)</code></td>
|
|
|
|
<td><code>__pow__</code></td>
|
|
|
|
<td><code>pow(x, y)</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>pow(l, self)</code></td>
|
|
|
|
<td><code>__rpow__</code></td>
|
|
|
|
<td><code>pow(y, x)</code></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h4><a name="self_t-spec-value-unary-ops"></a>Class <code>self_t</code> unary
|
|
operations</h4>
|
|
|
|
<table border="1" summary="self_t unary operations">
|
|
<tr>
|
|
<th>C++ Expression</th>
|
|
|
|
<th>Python Method Name</th>
|
|
|
|
<th>C++ Implementation</th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>-self</code></td>
|
|
|
|
<td><code>__neg__</code></td>
|
|
|
|
<td><code>-x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>+self</code></td>
|
|
|
|
<td><code>__pos__</code></td>
|
|
|
|
<td><code>+x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>~self</code></td>
|
|
|
|
<td><code>__invert__</code></td>
|
|
|
|
<td><code>~x</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>not self</code><br><i>or</i><br><code>!self</code></td>
|
|
|
|
<td><code>__nonzero__</code></td>
|
|
|
|
<td><code>!!x</code></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h4><a name="self_t-spec-value-ops"></a>Class <code>self_t</code> value
|
|
operations</h4>
|
|
|
|
<table border="1" summary="self_t value operations">
|
|
<tr>
|
|
<th>C++ Expression</th>
|
|
|
|
<th>Python Method Name</th>
|
|
|
|
<th>C++ Implementation</th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>int_(self)</code></td>
|
|
|
|
<td><code>__int__</code></td>
|
|
|
|
<td><code>long(x)</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>long_</code></td>
|
|
|
|
<td><code>__long__</code></td>
|
|
|
|
<td><code>PyLong_FromLong(x)</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>float_</code></td>
|
|
|
|
<td><code>__float__</code></td>
|
|
|
|
<td><code>double(x)</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>complex_</code></td>
|
|
|
|
<td><code>__complex__</code></td>
|
|
|
|
<td><code>std::complex<double>(x)</code></td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><code>str</code></td>
|
|
|
|
<td><code>__str__</code></td>
|
|
|
|
<td><code><a href=
|
|
"../../../conversion/lexical_cast.htm#lexical_cast">lexical_cast</a><std::string>(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><std::string>(x)</code></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h3><a name="other-spec"></a>Class Template <code>other</code></h3>
|
|
|
|
<p>Instances of <code>other<T></code> can be used in operator
|
|
expressions with <a href="#self-spec">self</a>; the result is equivalent
|
|
to the same expression with a <code>T</code> object in place of
|
|
<code>other<T></code>. Use <code>other<T></code> to prevent
|
|
construction of a <code>T</code> object in case it is heavyweight, when
|
|
no constructor is available, or simply for clarity.</p>
|
|
|
|
<h4><a name="other-spec-synopsis"></a>Class Template other synopsis</h4>
|
|
<pre>
|
|
namespace boost { namespace python
|
|
{
|
|
template <class T>
|
|
struct other
|
|
{
|
|
};
|
|
}}
|
|
</pre>
|
|
<!-- -->
|
|
|
|
<h3><a name="operator_-spec"></a>Class Template
|
|
<code>detail::operator_</code></h3>
|
|
|
|
<p>Instantiations of <code>detail::operator_<></code> are used as
|
|
the return type of operator expressions involving <code><a href=
|
|
"#self-spec">self</a></code>. This should be considered an implementation
|
|
detail and is only documented here as a way of showing how the result of
|
|
<code>self</code>-expressions match calls to <a href=
|
|
"class.html#class_-spec-modifiers">class_<>::def()</a>.</p>
|
|
|
|
<h4><a name="operator_-spec-synopsis"></a>Class Template
|
|
<code>detail::operator_</code> synopsis</h4>
|
|
<pre>
|
|
namespace boost { namespace python { namespace detail
|
|
{
|
|
template <<i>unspecified</i>>
|
|
struct operator_
|
|
{
|
|
};
|
|
}}}
|
|
</pre>
|
|
|
|
<h2><a name="objects"></a>Objects</h2>
|
|
|
|
<p><a name="self-spec"><code>self</code></a></p>
|
|
<pre>
|
|
namespace boost { namespace python
|
|
{
|
|
using self_ns::self;
|
|
}}
|
|
</pre>
|
|
|
|
<h2><a name="examples"></a>Example</h2>
|
|
<pre>
|
|
#include <boost/python/module.hpp>
|
|
#include <boost/python/class.hpp>
|
|
#include <boost/python/operators.hpp>
|
|
#include <boost/operators.hpp>
|
|
|
|
struct number
|
|
: boost::<a href=
|
|
"../../../utility/operators.htm#grpd_oprs">integer_arithmetic</a><number>
|
|
{
|
|
explicit number(long x_) : x(x_) {}
|
|
operator long() const { return x; }
|
|
|
|
template <class T>
|
|
number& operator+=(T const& rhs)
|
|
{ x += rhs; return *this; }
|
|
|
|
template <class T>
|
|
number& operator-=(T const& rhs)
|
|
{ x -= rhs; return *this; }
|
|
|
|
template <class T>
|
|
number& operator*=(T const& rhs)
|
|
{ x *= rhs; return *this; }
|
|
|
|
template <class T>
|
|
number& operator/=(T const& rhs)
|
|
{ x /= rhs; return *this; }
|
|
|
|
template <class T>
|
|
number& operator%=(T const& rhs)
|
|
{ x %= rhs; return *this; }
|
|
|
|
long x;
|
|
};
|
|
|
|
using namespace boost::python;
|
|
BOOST_PYTHON_MODULE(demo)
|
|
{
|
|
class_<number>("number", init<long>())
|
|
// interoperate with self
|
|
.def(self += self)
|
|
.def(self + self)
|
|
.def(self -= self)
|
|
.def(self - self)
|
|
.def(self *= self)
|
|
.def(self * self)
|
|
.def(self /= self)
|
|
.def(self / self)
|
|
.def(self %= self)
|
|
.def(self % self)
|
|
|
|
// Convert to Python int
|
|
.def(int_(self))
|
|
|
|
// interoperate with long
|
|
.def(self += long())
|
|
.def(self + long())
|
|
.def(long() + self)
|
|
.def(self -= long())
|
|
.def(self - long())
|
|
.def(long() - self)
|
|
.def(self *= long())
|
|
.def(self * long())
|
|
.def(long() * self)
|
|
.def(self /= long())
|
|
.def(self / long())
|
|
.def(long() / self)
|
|
.def(self %= long())
|
|
.def(self % long())
|
|
.def(long() % self)
|
|
;
|
|
}
|
|
</pre>
|
|
|
|
<p>Revised
|
|
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
|
|
5 October, 2004
|
|
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
|
|
</p>
|
|
|
|
<p><i>© Copyright <a href=
|
|
"http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
|
|
</body>
|
|
</html>
|
|
|