1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>size</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="back.html" title="back"> 10<link rel="next" href="at.html" title="at"> 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="back.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="at.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.sequence.intrinsic.functions.size"></a><a class="link" href="size.html" title="size">size</a> 28</h5></div></div></div> 29<h6> 30<a name="fusion.sequence.intrinsic.functions.size.h0"></a> 31 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.size.description"></a></span><a class="link" href="size.html#fusion.sequence.intrinsic.functions.size.description">Description</a> 32 </h6> 33<p> 34 Returns a type convertible to <code class="computeroutput"><span class="keyword">int</span></code> 35 that evaluates the number of elements in the sequence. 36 </p> 37<h6> 38<a name="fusion.sequence.intrinsic.functions.size.h1"></a> 39 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.size.synopsis"></a></span><a class="link" href="size.html#fusion.sequence.intrinsic.functions.size.synopsis">Synopsis</a> 40 </h6> 41<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">></span> 42<span class="keyword">typename</span> <a class="link" href="../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">type</span> 43<span class="identifier">size</span><span class="special">(</span><span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">seq</span><span class="special">);</span> 44</pre> 45<h6> 46<a name="fusion.sequence.intrinsic.functions.size.h2"></a> 47 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.size.parameters"></a></span><a class="link" href="size.html#fusion.sequence.intrinsic.functions.size.parameters">Parameters</a> 48 </h6> 49<div class="informaltable"><table class="table"> 50<colgroup> 51<col> 52<col> 53<col> 54</colgroup> 55<thead><tr> 56<th> 57 <p> 58 Parameter 59 </p> 60 </th> 61<th> 62 <p> 63 Requirement 64 </p> 65 </th> 66<th> 67 <p> 68 Description 69 </p> 70 </th> 71</tr></thead> 72<tbody><tr> 73<td> 74 <p> 75 <code class="computeroutput"><span class="identifier">seq</span></code> 76 </p> 77 </td> 78<td> 79 <p> 80 Model of <a class="link" href="../../concepts/forward_sequence.html" title="Forward Sequence">Forward 81 Sequence</a> 82 </p> 83 </td> 84<td> 85 <p> 86 The sequence we wish to investigate. 87 </p> 88 </td> 89</tr></tbody> 90</table></div> 91<h6> 92<a name="fusion.sequence.intrinsic.functions.size.h3"></a> 93 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.size.expression_semantics"></a></span><a class="link" href="size.html#fusion.sequence.intrinsic.functions.size.expression_semantics">Expression 94 Semantics</a> 95 </h6> 96<pre class="programlisting"><span class="identifier">size</span><span class="special">(</span><span class="identifier">seq</span><span class="special">);</span> 97</pre> 98<p> 99 <span class="bold"><strong>Return type</strong></span>: Convertible to <code class="computeroutput"><span class="keyword">int</span></code>. 100 </p> 101<p> 102 <span class="bold"><strong>Semantics</strong></span>: Returns the number of elements 103 in the sequence. 104 </p> 105<h6> 106<a name="fusion.sequence.intrinsic.functions.size.h4"></a> 107 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.size.header"></a></span><a class="link" href="size.html#fusion.sequence.intrinsic.functions.size.header">Header</a> 108 </h6> 109<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">sequence</span><span class="special">/</span><span class="identifier">intrinsic</span><span class="special">/</span><span class="identifier">size</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 110<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">size</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 111</pre> 112<h6> 113<a name="fusion.sequence.intrinsic.functions.size.h5"></a> 114 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.size.example"></a></span><a class="link" href="size.html#fusion.sequence.intrinsic.functions.size.example">Example</a> 115 </h6> 116<pre class="programlisting"><a class="link" href="../../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">></span> <span class="identifier">v</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">3</span><span class="special">);</span> 117<span class="identifier">assert</span><span class="special">(</span><span class="identifier">size</span><span class="special">(</span><span class="identifier">v</span><span class="special">)</span> <span class="special">==</span> <span class="number">3</span><span class="special">);</span> 118</pre> 119</div> 120<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 121<td align="left"></td> 122<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 123 Dan Marsden, Tobias Schwinger<p> 124 Distributed under the Boost Software License, Version 1.0. (See accompanying 125 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>) 126 </p> 127</div></td> 128</tr></table> 129<hr> 130<div class="spirit-nav"> 131<a accesskey="p" href="back.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="at.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 132</div> 133</body> 134</html> 135
