1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>any</title> 5<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../index.html" title="Chapter 1. Fusion 2.2"> 8<link rel="up" href="../functions.html" title="Functions"> 9<link rel="prev" href="../functions.html" title="Functions"> 10<link rel="next" href="all.html" title="all"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="../functions.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="all.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="fusion.algorithm.query.functions.any"></a><a class="link" href="any.html" title="any">any</a> 28</h5></div></div></div> 29<h6> 30<a name="fusion.algorithm.query.functions.any.h0"></a> 31 <span class="phrase"><a name="fusion.algorithm.query.functions.any.description"></a></span><a class="link" href="any.html#fusion.algorithm.query.functions.any.description">Description</a> 32 </h6> 33<p> 34 For a sequence <code class="computeroutput"><span class="identifier">seq</span></code> and 35 unary function object <code class="computeroutput"><span class="identifier">f</span></code>, 36 <code class="computeroutput"><span class="identifier">any</span></code> returns true if 37 <code class="computeroutput"><span class="identifier">f</span></code> returns true for at 38 least one element of <code class="computeroutput"><span class="identifier">seq</span></code>. 39 </p> 40<h6> 41<a name="fusion.algorithm.query.functions.any.h1"></a> 42 <span class="phrase"><a name="fusion.algorithm.query.functions.any.synopsis"></a></span><a class="link" href="any.html#fusion.algorithm.query.functions.any.synopsis">Synopsis</a> 43 </h6> 44<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> 45 <span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">,</span> 46 <span class="keyword">typename</span> <span class="identifier">F</span> 47 <span class="special">></span> 48<span class="keyword">typename</span> <a class="link" href="../metafunctions/any.html" title="any"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">any</span></code></a><span class="special"><</span><span class="identifier">Sequence</span><span class="special">,</span><span class="identifier">F</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">any</span><span class="special">(</span> 49 <span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">F</span> <span class="identifier">f</span><span class="special">);</span> 50</pre> 51<div class="table"> 52<a name="fusion.algorithm.query.functions.any.t0"></a><p class="title"><b>Table 1.52. Parameters</b></p> 53<div class="table-contents"><table class="table" summary="Parameters"> 54<colgroup> 55<col> 56<col> 57<col> 58</colgroup> 59<thead><tr> 60<th> 61 <p> 62 Parameter 63 </p> 64 </th> 65<th> 66 <p> 67 Requirement 68 </p> 69 </th> 70<th> 71 <p> 72 Description 73 </p> 74 </th> 75</tr></thead> 76<tbody> 77<tr> 78<td> 79 <p> 80 <code class="computeroutput"><span class="identifier">seq</span></code> 81 </p> 82 </td> 83<td> 84 <p> 85 A model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward 86 Sequence</a>, <code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">e</span><span class="special">)</span></code> must be a valid expression, 87 convertible to <code class="computeroutput"><span class="keyword">bool</span></code>, 88 for each element <code class="computeroutput"><span class="identifier">e</span></code> 89 in <code class="computeroutput"><span class="identifier">seq</span></code> 90 </p> 91 </td> 92<td> 93 <p> 94 The sequence to search 95 </p> 96 </td> 97</tr> 98<tr> 99<td> 100 <p> 101 <code class="computeroutput"><span class="identifier">f</span></code> 102 </p> 103 </td> 104<td> 105 <p> 106 A unary function object 107 </p> 108 </td> 109<td> 110 <p> 111 The search predicate 112 </p> 113 </td> 114</tr> 115</tbody> 116</table></div> 117</div> 118<br class="table-break"><h6> 119<a name="fusion.algorithm.query.functions.any.h2"></a> 120 <span class="phrase"><a name="fusion.algorithm.query.functions.any.expression_semantics"></a></span><a class="link" href="any.html#fusion.algorithm.query.functions.any.expression_semantics">Expression 121 semantics</a> 122 </h6> 123<pre class="programlisting"><a class="link" href="any.html" title="any"><code class="computeroutput"><span class="identifier">any</span></code></a><span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span> 124</pre> 125<p> 126 <span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">bool</span></code> 127 </p> 128<p> 129 <span class="bold"><strong>Semantics</strong></span>: Returns true if and only 130 if <code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">e</span><span class="special">)</span></code> 131 evaluates to <code class="computeroutput"><span class="keyword">true</span></code> for some 132 element <code class="computeroutput"><span class="identifier">e</span></code> in <code class="computeroutput"><span class="identifier">seq</span></code>. 133 </p> 134<h6> 135<a name="fusion.algorithm.query.functions.any.h3"></a> 136 <span class="phrase"><a name="fusion.algorithm.query.functions.any.complexity"></a></span><a class="link" href="any.html#fusion.algorithm.query.functions.any.complexity">Complexity</a> 137 </h6> 138<p> 139 Linear. At most <code class="computeroutput"><a class="link" href="../../../sequence/intrinsic/metafunctions/size.html" title="size"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">size</span></code></a><span class="special"><</span><span class="identifier">Sequence</span><span class="special">>::</span><span class="identifier">value</span></code> comparisons. 140 </p> 141<h6> 142<a name="fusion.algorithm.query.functions.any.h4"></a> 143 <span class="phrase"><a name="fusion.algorithm.query.functions.any.header"></a></span><a class="link" href="any.html#fusion.algorithm.query.functions.any.header">Header</a> 144 </h6> 145<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">algorithm</span><span class="special">/</span><span class="identifier">query</span><span class="special">/</span><span class="identifier">any</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 146<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">any</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 147</pre> 148<h6> 149<a name="fusion.algorithm.query.functions.any.h5"></a> 150 <span class="phrase"><a name="fusion.algorithm.query.functions.any.example"></a></span><a class="link" href="any.html#fusion.algorithm.query.functions.any.example">Example</a> 151 </h6> 152<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">odd</span> 153<span class="special">{</span> 154 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> 155 <span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">T</span> <span class="identifier">t</span><span class="special">)</span> <span class="keyword">const</span> 156 <span class="special">{</span> 157 <span class="keyword">return</span> <span class="identifier">t</span> <span class="special">%</span> <span class="number">2</span><span class="special">;</span> 158 <span class="special">}</span> 159<span class="special">};</span> 160<span class="special">...</span> 161<span class="identifier">assert</span><span class="special">(</span><a class="link" href="any.html" title="any"><code class="computeroutput"><span class="identifier">any</span></code></a><span class="special">(</span><a class="link" href="../../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">),</span> <span class="identifier">odd</span><span class="special">()));</span> 162<span class="identifier">assert</span><span class="special">(!</span><a class="link" href="any.html" title="any"><code class="computeroutput"><span class="identifier">any</span></code></a><span class="special">(</span><a class="link" href="../../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">2</span><span class="special">,</span><span class="number">4</span><span class="special">),</span> <span class="identifier">odd</span><span class="special">()));</span> 163</pre> 164</div> 165<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 166<td align="left"></td> 167<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 168 Dan Marsden, Tobias Schwinger<p> 169 Distributed under the Boost Software License, Version 1.0. (See accompanying 170 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 171 </p> 172</div></td> 173</tr></table> 174<hr> 175<div class="spirit-nav"> 176<a accesskey="p" href="../functions.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="all.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 177</div> 178</body> 179</html> 180
