<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>libstdc++: binders.h Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript">
$(document).ready(initResizable);
</script>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.7.4 -->
<div id="top">
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">libstdc++</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
initNavTree('a00773.html','');
</script>
<div id="doc-content">
<div class="header">
<div class="headertitle">
<div class="title">binders.h</div> </div>
</div>
<div class="contents">
<a href="a00773.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Functor implementations -*- C++ -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011</span>
<a name="l00004"></a>00004 <span class="comment">// Free Software Foundation, Inc.</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span>
<a name="l00007"></a>00007 <span class="comment">// software; you can redistribute it and/or modify it under the</span>
<a name="l00008"></a>00008 <span class="comment">// terms of the GNU General Public License as published by the</span>
<a name="l00009"></a>00009 <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span>
<a name="l00010"></a>00010 <span class="comment">// any later version.</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="comment">// This library is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00015"></a>00015 <span class="comment">// GNU General Public License for more details.</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span>
<a name="l00018"></a>00018 <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span>
<a name="l00019"></a>00019 <span class="comment">// 3.1, as published by the Free Software Foundation.</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="comment">// You should have received a copy of the GNU General Public License and</span>
<a name="l00022"></a>00022 <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span>
<a name="l00023"></a>00023 <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span>
<a name="l00024"></a>00024 <span class="comment">// <http://www.gnu.org/licenses/>.</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="comment">/*</span>
<a name="l00027"></a>00027 <span class="comment"> *</span>
<a name="l00028"></a>00028 <span class="comment"> * Copyright (c) 1994</span>
<a name="l00029"></a>00029 <span class="comment"> * Hewlett-Packard Company</span>
<a name="l00030"></a>00030 <span class="comment"> *</span>
<a name="l00031"></a>00031 <span class="comment"> * Permission to use, copy, modify, distribute and sell this software</span>
<a name="l00032"></a>00032 <span class="comment"> * and its documentation for any purpose is hereby granted without fee,</span>
<a name="l00033"></a>00033 <span class="comment"> * provided that the above copyright notice appear in all copies and</span>
<a name="l00034"></a>00034 <span class="comment"> * that both that copyright notice and this permission notice appear</span>
<a name="l00035"></a>00035 <span class="comment"> * in supporting documentation. Hewlett-Packard Company makes no</span>
<a name="l00036"></a>00036 <span class="comment"> * representations about the suitability of this software for any</span>
<a name="l00037"></a>00037 <span class="comment"> * purpose. It is provided "as is" without express or implied warranty.</span>
<a name="l00038"></a>00038 <span class="comment"> *</span>
<a name="l00039"></a>00039 <span class="comment"> *</span>
<a name="l00040"></a>00040 <span class="comment"> * Copyright (c) 1996-1998</span>
<a name="l00041"></a>00041 <span class="comment"> * Silicon Graphics Computer Systems, Inc.</span>
<a name="l00042"></a>00042 <span class="comment"> *</span>
<a name="l00043"></a>00043 <span class="comment"> * Permission to use, copy, modify, distribute and sell this software</span>
<a name="l00044"></a>00044 <span class="comment"> * and its documentation for any purpose is hereby granted without fee,</span>
<a name="l00045"></a>00045 <span class="comment"> * provided that the above copyright notice appear in all copies and</span>
<a name="l00046"></a>00046 <span class="comment"> * that both that copyright notice and this permission notice appear</span>
<a name="l00047"></a>00047 <span class="comment"> * in supporting documentation. Silicon Graphics makes no</span>
<a name="l00048"></a>00048 <span class="comment"> * representations about the suitability of this software for any</span>
<a name="l00049"></a>00049 <span class="comment"> * purpose. It is provided "as is" without express or implied warranty.</span>
<a name="l00050"></a>00050 <span class="comment"> */</span>
<a name="l00051"></a>00051 <span class="comment"></span>
<a name="l00052"></a>00052 <span class="comment">/** @file backward/binders.h</span>
<a name="l00053"></a>00053 <span class="comment"> * This is an internal header file, included by other library headers.</span>
<a name="l00054"></a>00054 <span class="comment"> * Do not attempt to use it directly. @headername{functional}</span>
<a name="l00055"></a>00055 <span class="comment"> */</span>
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="preprocessor">#ifndef _BACKWARD_BINDERS_H</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span><span class="preprocessor">#define _BACKWARD_BINDERS_H 1</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span>
<a name="l00060"></a>00060 <span class="keyword">namespace </span>std _GLIBCXX_VISIBILITY(default)
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 _GLIBCXX_BEGIN_NAMESPACE_VERSION
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">// 20.3.6 binders</span><span class="comment"></span>
<a name="l00065"></a>00065 <span class="comment"> /** @defgroup binders Binder Classes</span>
<a name="l00066"></a>00066 <span class="comment"> * @ingroup functors</span>
<a name="l00067"></a>00067 <span class="comment"> *</span>
<a name="l00068"></a>00068 <span class="comment"> * Binders turn functions/functors with two arguments into functors</span>
<a name="l00069"></a>00069 <span class="comment"> * with a single argument, storing an argument to be applied later.</span>
<a name="l00070"></a>00070 <span class="comment"> * For example, a variable @c B of type @c binder1st is constructed</span>
<a name="l00071"></a>00071 <span class="comment"> * from a functor @c f and an argument @c x. Later, B's @c</span>
<a name="l00072"></a>00072 <span class="comment"> * operator() is called with a single argument @c y. The return</span>
<a name="l00073"></a>00073 <span class="comment"> * value is the value of @c f(x,y). @c B can be @a called with</span>
<a name="l00074"></a>00074 <span class="comment"> * various arguments (y1, y2, ...) and will in turn call @c</span>
<a name="l00075"></a>00075 <span class="comment"> * f(x,y1), @c f(x,y2), ...</span>
<a name="l00076"></a>00076 <span class="comment"> *</span>
<a name="l00077"></a>00077 <span class="comment"> * The function @c bind1st is provided to save some typing. It takes the</span>
<a name="l00078"></a>00078 <span class="comment"> * function and an argument as parameters, and returns an instance of</span>
<a name="l00079"></a>00079 <span class="comment"> * @c binder1st.</span>
<a name="l00080"></a>00080 <span class="comment"> *</span>
<a name="l00081"></a>00081 <span class="comment"> * The type @c binder2nd and its creator function @c bind2nd do the same</span>
<a name="l00082"></a>00082 <span class="comment"> * thing, but the stored argument is passed as the second parameter instead</span>
<a name="l00083"></a>00083 <span class="comment"> * of the first, e.g., @c bind2nd(std::minus<float>,1.3) will create a</span>
<a name="l00084"></a>00084 <span class="comment"> * functor whose @c operator() accepts a floating-point number, subtracts</span>
<a name="l00085"></a>00085 <span class="comment"> * 1.3 from it, and returns the result. (If @c bind1st had been used,</span>
<a name="l00086"></a>00086 <span class="comment"> * the functor would perform <em>1.3 - x</em> instead.</span>
<a name="l00087"></a>00087 <span class="comment"> *</span>
<a name="l00088"></a>00088 <span class="comment"> * Creator-wrapper functions like @c bind1st are intended to be used in</span>
<a name="l00089"></a>00089 <span class="comment"> * calling algorithms. Their return values will be temporary objects.</span>
<a name="l00090"></a>00090 <span class="comment"> * (The goal is to not require you to type names like</span>
<a name="l00091"></a>00091 <span class="comment"> * @c std::binder1st<std::plus<int>> for declaring a variable to hold the</span>
<a name="l00092"></a>00092 <span class="comment"> * return value from @c bind1st(std::plus<int>,5).</span>
<a name="l00093"></a>00093 <span class="comment"> *</span>
<a name="l00094"></a>00094 <span class="comment"> * These become more useful when combined with the composition functions.</span>
<a name="l00095"></a>00095 <span class="comment"> *</span>
<a name="l00096"></a>00096 <span class="comment"> * @{</span>
<a name="l00097"></a>00097 <span class="comment"> */</span><span class="comment"></span>
<a name="l00098"></a>00098 <span class="comment"> /// One of the @link binders binder functors@endlink.</span>
<a name="l00099"></a>00099 <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Operation>
<a name="l00100"></a><a class="code" href="a00409.html">00100</a> <span class="keyword">class </span><a class="code" href="a00409.html" title="One of the binder functors.">binder1st</a>
<a name="l00101"></a>00101 : <span class="keyword">public</span> <a class="code" href="a00723.html">unary_function</a><typename _Operation::second_argument_type,
<a name="l00102"></a>00102 typename _Operation::result_type>
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 <span class="keyword">protected</span>:
<a name="l00105"></a>00105 _Operation op;
<a name="l00106"></a>00106 <span class="keyword">typename</span> _Operation::first_argument_type value;
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keyword">public</span>:
<a name="l00109"></a>00109 <a class="code" href="a00409.html" title="One of the binder functors.">binder1st</a>(<span class="keyword">const</span> _Operation& __x,
<a name="l00110"></a>00110 <span class="keyword">const</span> <span class="keyword">typename</span> _Operation::first_argument_type& __y)
<a name="l00111"></a>00111 : op(__x), value(__y) { }
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keyword">typename</span> _Operation::result_type
<a name="l00114"></a>00114 operator()(<span class="keyword">const</span> <span class="keyword">typename</span> _Operation::second_argument_type& __x)<span class="keyword"> const</span>
<a name="l00115"></a>00115 <span class="keyword"> </span>{ <span class="keywordflow">return</span> op(value, __x); }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<a name="l00118"></a>00118 <span class="comment">// 109. Missing binders for non-const sequence elements</span>
<a name="l00119"></a>00119 <span class="keyword">typename</span> _Operation::result_type
<a name="l00120"></a>00120 operator()(<span class="keyword">typename</span> _Operation::second_argument_type& __x)<span class="keyword"> const</span>
<a name="l00121"></a>00121 <span class="keyword"> </span>{ <span class="keywordflow">return</span> op(value, __x); }
<a name="l00122"></a>00122 } _GLIBCXX_DEPRECATED;
<a name="l00123"></a>00123 <span class="comment"></span>
<a name="l00124"></a>00124 <span class="comment"> /// One of the @link binders binder functors@endlink.</span>
<a name="l00125"></a>00125 <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Operation, <span class="keyword">typename</span> _Tp>
<a name="l00126"></a>00126 <span class="keyword">inline</span> <a class="code" href="a00409.html" title="One of the binder functors.">binder1st<_Operation></a>
<a name="l00127"></a><a class="code" href="a01180.html#ga99ad97ec01b0e474c85ab81ddd5e1a91">00127</a> <a class="code" href="a01180.html#ga99ad97ec01b0e474c85ab81ddd5e1a91" title="One of the binder functors.">bind1st</a>(<span class="keyword">const</span> _Operation& __fn, <span class="keyword">const</span> _Tp& __x)
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 <span class="keyword">typedef</span> <span class="keyword">typename</span> _Operation::first_argument_type _Arg1_type;
<a name="l00130"></a>00130 <span class="keywordflow">return</span> <a class="code" href="a00409.html" title="One of the binder functors.">binder1st<_Operation></a>(__fn, _Arg1_type(__x));
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132 <span class="comment"></span>
<a name="l00133"></a>00133 <span class="comment"> /// One of the @link binders binder functors@endlink.</span>
<a name="l00134"></a>00134 <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Operation>
<a name="l00135"></a><a class="code" href="a00410.html">00135</a> <span class="keyword">class </span><a class="code" href="a00410.html" title="One of the binder functors.">binder2nd</a>
<a name="l00136"></a>00136 : <span class="keyword">public</span> <a class="code" href="a00723.html">unary_function</a><typename _Operation::first_argument_type,
<a name="l00137"></a>00137 typename _Operation::result_type>
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139 <span class="keyword">protected</span>:
<a name="l00140"></a>00140 _Operation op;
<a name="l00141"></a>00141 <span class="keyword">typename</span> _Operation::second_argument_type value;
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="keyword">public</span>:
<a name="l00144"></a>00144 <a class="code" href="a00410.html" title="One of the binder functors.">binder2nd</a>(<span class="keyword">const</span> _Operation& __x,
<a name="l00145"></a>00145 <span class="keyword">const</span> <span class="keyword">typename</span> _Operation::second_argument_type& __y)
<a name="l00146"></a>00146 : op(__x), value(__y) { }
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="keyword">typename</span> _Operation::result_type
<a name="l00149"></a>00149 operator()(<span class="keyword">const</span> <span class="keyword">typename</span> _Operation::first_argument_type& __x)<span class="keyword"> const</span>
<a name="l00150"></a>00150 <span class="keyword"> </span>{ <span class="keywordflow">return</span> op(__x, value); }
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<a name="l00153"></a>00153 <span class="comment">// 109. Missing binders for non-const sequence elements</span>
<a name="l00154"></a>00154 <span class="keyword">typename</span> _Operation::result_type
<a name="l00155"></a>00155 operator()(<span class="keyword">typename</span> _Operation::first_argument_type& __x)<span class="keyword"> const</span>
<a name="l00156"></a>00156 <span class="keyword"> </span>{ <span class="keywordflow">return</span> op(__x, value); }
<a name="l00157"></a>00157 } _GLIBCXX_DEPRECATED;
<a name="l00158"></a>00158 <span class="comment"></span>
<a name="l00159"></a>00159 <span class="comment"> /// One of the @link binders binder functors@endlink.</span>
<a name="l00160"></a>00160 <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Operation, <span class="keyword">typename</span> _Tp>
<a name="l00161"></a>00161 <span class="keyword">inline</span> <a class="code" href="a00410.html" title="One of the binder functors.">binder2nd<_Operation></a>
<a name="l00162"></a><a class="code" href="a01180.html#gad4d0ba78d6ff00f62ceb2d404c6fd456">00162</a> <a class="code" href="a01180.html#gad4d0ba78d6ff00f62ceb2d404c6fd456" title="One of the binder functors.">bind2nd</a>(<span class="keyword">const</span> _Operation& __fn, <span class="keyword">const</span> _Tp& __x)
<a name="l00163"></a>00163 {
<a name="l00164"></a>00164 <span class="keyword">typedef</span> <span class="keyword">typename</span> _Operation::second_argument_type _Arg2_type;
<a name="l00165"></a>00165 <span class="keywordflow">return</span> <a class="code" href="a00410.html" title="One of the binder functors.">binder2nd<_Operation></a>(__fn, _Arg2_type(__x));
<a name="l00166"></a>00166 } <span class="comment"></span>
<a name="l00167"></a>00167 <span class="comment"> /** @} */</span>
<a name="l00168"></a>00168
<a name="l00169"></a>00169 _GLIBCXX_END_NAMESPACE_VERSION
<a name="l00170"></a>00170 } <span class="comment">// namespace</span>
<a name="l00171"></a>00171
<a name="l00172"></a>00172 <span class="preprocessor">#endif </span><span class="comment">/* _BACKWARD_BINDERS_H */</span>
</pre></div></div>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><a class="el" href="a00773.html">binders.h</a> </li>
<li class="footer">Generated by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4 </li>
</ul>
</div>
</body>
</html>
