1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>find</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. Range 2.0"> 8<link rel="up" href="../non_mutating.html" title="Non-mutating algorithms"> 9<link rel="prev" href="for_each.html" title="for_each"> 10<link rel="next" href="find_end.html" title="find_end"> 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="for_each.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../non_mutating.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="find_end.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="range.reference.algorithms.non_mutating.find"></a><a class="link" href="find.html" title="find">find</a> 28</h5></div></div></div> 29<h6> 30<a name="range.reference.algorithms.non_mutating.find.h0"></a> 31 <span class="phrase"><a name="range.reference.algorithms.non_mutating.find.prototype"></a></span><a class="link" href="find.html#range.reference.algorithms.non_mutating.find.prototype">Prototype</a> 32 </h6> 33<p> 34</p> 35<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">SinglePassRange</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Value</span><span class="special">></span> 36<span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="identifier">SinglePassRange</span><span class="special">>::</span><span class="identifier">type</span> 37<span class="identifier">find</span><span class="special">(</span><span class="identifier">SinglePassRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">Value</span> <span class="identifier">val</span><span class="special">);</span> 38 39<span class="keyword">template</span><span class="special"><</span> 40 <span class="identifier">range_return_value</span> <span class="identifier">re</span><span class="special">,</span> 41 <span class="keyword">class</span> <span class="identifier">SinglePassRange</span><span class="special">,</span> 42 <span class="keyword">class</span> <span class="identifier">Value</span> 43 <span class="special">></span> 44<span class="keyword">typename</span> <span class="identifier">range_return</span><span class="special"><</span><span class="identifier">SinglePassRange</span><span class="special">,</span> <span class="identifier">re</span><span class="special">>::</span><span class="identifier">type</span> 45<span class="identifier">find</span><span class="special">(</span><span class="identifier">SinglePassRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">Value</span> <span class="identifier">val</span><span class="special">);</span> 46</pre> 47<p> 48 </p> 49<h6> 50<a name="range.reference.algorithms.non_mutating.find.h1"></a> 51 <span class="phrase"><a name="range.reference.algorithms.non_mutating.find.description"></a></span><a class="link" href="find.html#range.reference.algorithms.non_mutating.find.description">Description</a> 52 </h6> 53<p> 54 The versions of <code class="computeroutput"><span class="identifier">find</span></code> 55 that return an iterator, returns the first iterator in the range <code class="computeroutput"><span class="identifier">rng</span></code> such that <code class="computeroutput"><span class="special">*</span><span class="identifier">i</span> <span class="special">==</span> <span class="identifier">value</span></code>. <code class="computeroutput"><span class="identifier">end</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code> is returned if no such iterator exists. 56 The versions of find that return a <code class="computeroutput"><span class="identifier">range_return</span></code>, 57 defines <code class="computeroutput"><span class="identifier">found</span></code> in the 58 same manner as the returned iterator described above. 59 </p> 60<h6> 61<a name="range.reference.algorithms.non_mutating.find.h2"></a> 62 <span class="phrase"><a name="range.reference.algorithms.non_mutating.find.definition"></a></span><a class="link" href="find.html#range.reference.algorithms.non_mutating.find.definition">Definition</a> 63 </h6> 64<p> 65 Defined in the header file <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">range</span><span class="special">/</span><span class="identifier">algorithm</span><span class="special">/</span><span class="identifier">find</span><span class="special">.</span><span class="identifier">hpp</span></code> 66 </p> 67<h6> 68<a name="range.reference.algorithms.non_mutating.find.h3"></a> 69 <span class="phrase"><a name="range.reference.algorithms.non_mutating.find.requirements"></a></span><a class="link" href="find.html#range.reference.algorithms.non_mutating.find.requirements">Requirements</a> 70 </h6> 71<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 72<li class="listitem"> 73 <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> is 74 a model of the <a class="link" href="../../../concepts/single_pass_range.html" title="Single Pass Range">Single 75 Pass Range</a> Concept. 76 </li> 77<li class="listitem"> 78 <code class="computeroutput"><span class="identifier">Value</span></code> is a model 79 of the <code class="computeroutput"><span class="identifier">EqualityComparableConcept</span></code>. 80 </li> 81<li class="listitem"> 82 The <code class="computeroutput"><span class="keyword">operator</span><span class="special">==</span></code> 83 is defined for type <code class="computeroutput"><span class="identifier">Value</span></code> 84 to be compared with the <code class="computeroutput"><span class="identifier">SinglePassRange</span></code>'s 85 value type. 86 </li> 87</ul></div> 88<h6> 89<a name="range.reference.algorithms.non_mutating.find.h4"></a> 90 <span class="phrase"><a name="range.reference.algorithms.non_mutating.find.complexity"></a></span><a class="link" href="find.html#range.reference.algorithms.non_mutating.find.complexity">Complexity</a> 91 </h6> 92<p> 93 Linear. At most <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code> comparisons for equality. 94 </p> 95</div> 96<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 97<td align="left"></td> 98<td align="right"><div class="copyright-footer">Copyright © 2003-2010 Thorsten Ottosen, 99 Neil Groves<p> 100 Distributed under the Boost Software License, Version 1.0. (See accompanying 101 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>) 102 </p> 103</div></td> 104</tr></table> 105<hr> 106<div class="spirit-nav"> 107<a accesskey="p" href="for_each.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../non_mutating.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="find_end.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 108</div> 109</body> 110</html> 111
