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[SVN r56179]
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Joel de Guzman
2009-09-14 07:47:53 +00:00
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doc/html/fusion/sequence/intrinsic/metafunctions/value_at.html
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@@ -3,10 +3,10 @@
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>value_at</title>
<link rel="stylesheet" href="../../../../../../../../doc/html/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<link rel="start" href="../../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
<meta name="generator" content="DocBook XSL Stylesheets V1.65.1">
<link rel="home" href="../../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
<link rel="up" href="../metafunctions.html" title="Metafunctions">
<link rel="prev" href="at_c.html" title="at_c">
<link rel="previous" href="at_c.html" title="at_c">
<link rel="next" href="value_at_c.html" title="value_at_c">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
@@ -23,21 +23,24 @@
<a accesskey="p" href="at_c.html"><img src="../../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.html"><img src="../../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="value_at_c.html"><img src="../../../../../../../../doc/html/images/next.png" alt="Next"></a>
</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.sequence.intrinsic.metafunctions.value_at"></a><a href="value_at.html" title="value_at">value_at</a></h5></div></div></div>
<div class="titlepage">
<div><div><h5 class="title">
<a name="fusion.sequence.intrinsic.metafunctions.value_at"></a><a href="value_at.html" title="value_at">value_at</a>
</h5></div></div>
<div></div>
</div>
<a name="fusion.sequence.intrinsic.metafunctions.value_at.description"></a><h6>
<a name="id514165"></a>
<a name="id465499"></a>
<a href="value_at.html#fusion.sequence.intrinsic.metafunctions.value_at.description">Description</a>
</h6>
<p>
Returns the actual type at a given index from the <a href="../../../sequence.html" title="Sequence">Sequence</a>.
</p>
<a name="fusion.sequence.intrinsic.metafunctions.value_at.synopsis"></a><h6>
<a name="id514205"></a>
<a name="id465536"></a>
<a href="value_at.html#fusion.sequence.intrinsic.metafunctions.value_at.synopsis">Synopsis</a>
</h6>
<pre class="programlisting">
<span class="keyword">template</span><span class="special">&lt;</span>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
<span class="keyword">typename</span> <span class="identifier">Seq</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">N</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">value_at</span>
@@ -46,7 +49,7 @@
<span class="special">};</span>
</pre>
<div class="table">
<a name="id514323"></a><p class="title"><b>Table<EFBFBD>1.27.<2E>Parameters</b></p>
<a name="id465652"></a><p class="title"><b>Table<EFBFBD>1.27.<2E>Parameters</b></p>
<table class="table" summary="Parameters">
<colgroup>
<col>
@@ -54,70 +57,51 @@
<col>
</colgroup>
<thead><tr>
<th>
<p>
<th><p>
Parameter
</p>
</th>
<th>
<p>
</p></th>
<th><p>
Requirement
</p>
</th>
<th>
<p>
</p></th>
<th><p>
Description
</p>
</th>
</p></th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<td><p>
<tt class="computeroutput"><span class="identifier">Seq</span></tt>
</p>
</td>
<td>
<p>
</p></td>
<td><p>
A model of <a href="../../concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>
</p>
</td>
<td>
<p>
</p></td>
<td><p>
Argument sequence
</p>
</td>
</p></td>
</tr>
<tr>
<td>
<p>
<td><p>
<tt class="computeroutput"><span class="identifier">N</span></tt>
</p>
</td>
<td>
<p>
</p></td>
<td><p>
An <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
Integral Constant</a>
</p>
</td>
<td>
<p>
</p></td>
<td><p>
Index of element
</p>
</td>
</p></td>
</tr>
</tbody>
</table>
</div>
<a name="fusion.sequence.intrinsic.metafunctions.value_at.expression_semantics"></a><h6>
<a name="id514468"></a>
<a name="id465797"></a>
<a href="value_at.html#fusion.sequence.intrinsic.metafunctions.value_at.expression_semantics">Expression
Semantics</a>
</h6>
<pre class="programlisting">
<span class="identifier">result_of</span><span class="special">::</span><span class="identifier">value_at</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">,</span> <span class="identifier">N</span><span class="special">&gt;::</span><span class="identifier">type</span>
<pre class="programlisting"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">value_at</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">,</span> <span class="identifier">N</span><span class="special">&gt;::</span><span class="identifier">type</span>
</pre>
<p>
<span class="bold"><b>Return type</b></span>: Any type.
@@ -130,11 +114,10 @@
/sequence/intrinsic/value_at.hpp&gt;
</p>
<a name="fusion.sequence.intrinsic.metafunctions.value_at.example"></a><h6>
<a name="id514601"></a>
<a name="id465925"></a>
<a href="value_at.html#fusion.sequence.intrinsic.metafunctions.value_at.example">Example</a>
</h6>
<pre class="programlisting">
<span class="keyword">typedef</span> <a href="../../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">float</span><span class="special">,</span><span class="keyword">char</span><span class="special">&gt;</span> <span class="identifier">vec</span><span class="special">;</span>
<pre class="programlisting"><span class="keyword">typedef</span> <a href="../../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">float</span><span class="special">,</span><span class="keyword">char</span><span class="special">&gt;</span> <span class="identifier">vec</span><span class="special">;</span>
<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_same</span><span class="special">&lt;</span><a href="value_at.html" title="value_at"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">value_at</span></tt></a><span class="special">&lt;</span><span class="identifier">vec</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">int_</span><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">type</span><span class="special">,</span> <span class="keyword">float</span><span class="special">&gt;));</span>
</pre>
</div>