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120 lines
3.4 KiB
HTML
120 lines
3.4 KiB
HTML
<!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/long.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/long.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="#long_-spec">Class <code>long_</code></a></dt>
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<dd>
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<dl class="page-index">
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<dt><a href="#long_-spec-synopsis">Class <code>long_</code>
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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="#examples">Example(s)</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>Exposes a <a href=
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"ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> for the Python
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<a href=
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"http://www.python.org/doc/current/lib/typesnumeric.html">long</a>
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integer type.</p>
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<h2><a name="classes"></a>Classes</h2>
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<h3><a name="long_-spec"></a>Class <code>long_</code></h3>
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<p>Exposes the <a href=
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"http://www.python.org/doc/current/lib/typesnumeric.html">numeric type
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protocol</a> of Python's built-in <code>long</code> type. The semantics
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of the constructors and member functions defined below can be fully
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understood by reading the <a href=
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"ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> concept
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definition. Since <code>long_</code> is publicly derived from <code><a
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href="object.html#object-spec">object</a></code>, the public object
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interface applies to <code>long_</code> instances as well.</p>
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<h4><a name="long_-spec-synopsis"></a>Class <code>long_</code>
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synopsis</h4>
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<pre>
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namespace boost { namespace python
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{
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class long_ : public object
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{
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public:
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long_(); // new long_
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template <class T>
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explicit long_(T const& rhs);
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template <class T, class U>
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long_(T const& rhs, U const& base);
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};
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}}
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</pre>
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<h2><a name="examples"></a>Example</h2>
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<pre>
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namespace python = boost::python;
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// compute a factorial without overflowing
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python::long_ fact(long n)
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{
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if (n == 0)
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return python::long_(1);
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else
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return n * fact(n - 1);
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}
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</pre>
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<p>Revised 1 October, 2002</p>
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<p><i>© Copyright <a href=
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"http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
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</body>
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</html>
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