| 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
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| 3 | <!-- Copyright David Abrahams 2006. Distributed under the Boost --> |
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| 4 | <!-- Software License, Version 1.0. (See accompanying --> |
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| 5 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> |
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| 6 | <html> |
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| 9 | "HTML Tidy for Windows (vers 1st August 2002), see www.w3.org"> |
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| 11 | <link rel="stylesheet" type="text/css" href="../boost.css"> |
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| 12 | |
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| 13 | <title>Boost.Python - <boost/python/long.hpp></title> |
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| 14 | </head> |
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| 15 | |
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| 16 | <body> |
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| 17 | <table border="0" cellpadding="7" cellspacing="0" width="100%" summary= |
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| 18 | "header"> |
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| 19 | <tr> |
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| 20 | <td valign="top" width="300"> |
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| 21 | <h3><a href="../../../../index.htm"><img height="86" width="277" |
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| 22 | alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3> |
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| 23 | </td> |
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| 24 | |
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| 25 | <td valign="top"> |
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| 26 | <h1 align="center"><a href="../index.html">Boost.Python</a></h1> |
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| 27 | |
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| 28 | <h2 align="center">Header <boost/python/long.hpp></h2> |
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| 29 | </td> |
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| 30 | </tr> |
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| 31 | </table> |
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| 32 | <hr> |
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| 33 | |
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| 34 | <h2>Contents</h2> |
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| 35 | |
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| 36 | <dl class="page-index"> |
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| 37 | <dt><a href="#introduction">Introduction</a></dt> |
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| 38 | |
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| 39 | <dt><a href="#classes">Classes</a></dt> |
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| 40 | |
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| 41 | <dd> |
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| 42 | <dl class="page-index"> |
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| 43 | <dt><a href="#long_-spec">Class <code>long_</code></a></dt> |
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| 44 | |
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| 45 | <dd> |
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| 46 | <dl class="page-index"> |
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| 47 | <dt><a href="#long_-spec-synopsis">Class <code>long_</code> |
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| 48 | synopsis</a></dt> |
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| 49 | </dl> |
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| 50 | </dd> |
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| 51 | </dl> |
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| 52 | </dd> |
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| 53 | |
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| 54 | <dt><a href="#examples">Example(s)</a></dt> |
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| 55 | </dl> |
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| 56 | <hr> |
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| 57 | |
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| 58 | <h2><a name="introduction"></a>Introduction</h2> |
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| 59 | |
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| 60 | <p>Exposes a <a href= |
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| 61 | "ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> for the Python |
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| 62 | <a href= |
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| 63 | "http://www.python.org/doc/current/lib/typesnumeric.html">long</a> |
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| 64 | integer type.</p> |
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| 65 | |
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| 66 | <h2><a name="classes"></a>Classes</h2> |
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| 67 | |
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| 68 | <h3><a name="long_-spec"></a>Class <code>long_</code></h3> |
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| 69 | |
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| 70 | <p>Exposes the <a href= |
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| 71 | "http://www.python.org/doc/current/lib/typesnumeric.html">numeric type |
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| 72 | protocol</a> of Python's built-in <code>long</code> type. The semantics |
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| 73 | of the constructors and member functions defined below can be fully |
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| 74 | understood by reading the <a href= |
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| 75 | "ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> concept |
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| 76 | definition. Since <code>long_</code> is publicly derived from <code><a |
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| 77 | href="object.html#object-spec">object</a></code>, the public object |
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| 78 | interface applies to <code>long_</code> instances as well.</p> |
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| 79 | |
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| 80 | <h4><a name="long_-spec-synopsis"></a>Class <code>long_</code> |
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| 81 | synopsis</h4> |
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| 82 | <pre> |
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| 83 | namespace boost { namespace python |
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| 84 | { |
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| 85 | class long_ : public object |
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| 86 | { |
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| 87 | public: |
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| 88 | long_(); // new long_ |
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| 89 | |
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| 90 | template <class T> |
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| 91 | explicit long_(T const& rhs); |
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| 92 | |
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| 93 | template <class T, class U> |
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| 94 | long_(T const& rhs, U const& base); |
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| 95 | }; |
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| 96 | }} |
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| 97 | </pre> |
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| 98 | |
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| 99 | <h2><a name="examples"></a>Example</h2> |
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| 100 | <pre> |
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| 101 | namespace python = boost::python; |
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| 102 | |
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| 103 | // compute a factorial without overflowing |
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| 104 | python::long_ fact(long n) |
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| 105 | { |
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| 106 | if (n == 0) |
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| 107 | return python::long_(1); |
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| 108 | else |
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| 109 | return n * fact(n - 1); |
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| 110 | } |
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| 111 | </pre> |
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| 112 | |
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| 113 | <p>Revised 1 October, 2002</p> |
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| 114 | |
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| 115 | <p><i>© Copyright <a href= |
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| 116 | "../../../../people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p> |
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| 117 | </body> |
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| 118 | </html> |
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| 119 | |
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