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<div class="refentry">
<a name="boost.xpressive.op.at"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct at</span></h2>
<p>boost::xpressive::op::at — <code class="computeroutput">at</code> is a PolymorphicFunctionObject for indexing into a sequence </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../../xpressive/reference.html#header.boost.xpressive.regex_actions_hpp" title="Header <boost/xpressive/regex_actions.hpp>">boost/xpressive/regex_actions.hpp</a>>
</span>
<span class="keyword">struct</span> <a class="link" href="at.html" title="Struct at">at</a> <span class="special">{</span>
<span class="comment">// member classes/structs/unions</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Sig<span class="special">></span>
<span class="keyword">struct</span> <a class="link" href="at/result.html" title="Struct template result">result</a> <span class="special">{</span>
<span class="special">}</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> This<span class="special">,</span> <span class="keyword">typename</span> Cont<span class="special">,</span> <span class="keyword">typename</span> Idx<span class="special">></span>
<span class="keyword">struct</span> <a class="link" href="at/result_This_C_idp358124288.html" title="Struct template result<This(Cont &, Idx)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">Cont</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">Idx</span><span class="special">)</span><span class="special">></span> <span class="special">{</span>
<span class="comment">// types</span>
<span class="keyword">typedef</span> <span class="identifier">Cont</span><span class="special">::</span><span class="identifier">reference</span> <a class="link" href="at/result_This_C_idp358124288.html#boost.xpressive.op.at.result_This(C_idp358124288.type"><span class="identifier">type</span></a><span class="special">;</span>
<span class="special">}</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> This<span class="special">,</span> <span class="keyword">typename</span> Cont<span class="special">,</span> <span class="keyword">typename</span> Idx<span class="special">></span>
<span class="keyword">struct</span> <a class="link" href="at/result_This_C_idp358128208.html" title="Struct template result<This(Cont const &, Idx)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">Cont</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">Idx</span><span class="special">)</span><span class="special">></span> <span class="special">{</span>
<span class="comment">// types</span>
<span class="keyword">typedef</span> <span class="identifier">Cont</span><span class="special">::</span><span class="identifier">const_reference</span> <a class="link" href="at/result_This_C_idp358128208.html#boost.xpressive.op.at.result_This(C_idp358128208.type"><span class="identifier">type</span></a><span class="special">;</span>
<span class="special">}</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> This<span class="special">,</span> <span class="keyword">typename</span> Cont<span class="special">,</span> <span class="keyword">typename</span> Idx<span class="special">></span>
<span class="keyword">struct</span> <a class="link" href="at/result_This_C_idp358132128.html" title="Struct template result<This(Cont, Idx)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">Cont</span><span class="special">,</span> <span class="identifier">Idx</span><span class="special">)</span><span class="special">></span> <span class="special">{</span>
<span class="comment">// types</span>
<span class="keyword">typedef</span> <span class="identifier">Cont</span><span class="special">::</span><span class="identifier">const_reference</span> <a class="link" href="at/result_This_C_idp358132128.html#boost.xpressive.op.at.result_This(C_idp358132128.type"><span class="identifier">type</span></a><span class="special">;</span>
<span class="special">}</span><span class="special">;</span>
<span class="comment">// <a class="link" href="at.html#idp358136048-bb">public member functions</a></span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Cont<span class="special">,</span> <span class="keyword">typename</span> Idx<span class="special">></span>
<span class="identifier">Cont</span><span class="special">::</span><span class="identifier">reference</span> <a class="link" href="at.html#idp358136608-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Cont</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">Idx</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Cont<span class="special">,</span> <span class="keyword">typename</span> Idx<span class="special">></span>
<span class="identifier">Cont</span><span class="special">::</span><span class="identifier">const_reference</span> <a class="link" href="at.html#idp358143200-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Cont</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">Idx</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp535070032"></a><h2>Description</h2>
<div class="refsect2">
<a name="idp535070448"></a><h3>
<a name="idp358136048-bb"></a><code class="computeroutput">at</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Cont<span class="special">,</span> <span class="keyword">typename</span> Idx<span class="special">></span>
<span class="identifier">Cont</span><span class="special">::</span><span class="identifier">reference</span> <a name="idp358136608-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Cont</span> <span class="special">&</span> c<span class="special">,</span> <span class="identifier">Idx</span> idx<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">c</code></span></p></td>
<td><p>The RandomAccessSequence to index into </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">idx</code></span></p></td>
<td><p>The index </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p><code class="computeroutput">Cont</code> is a model of RandomAccessSequence </p></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p><code class="computeroutput">c[idx]</code> </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Cont<span class="special">,</span> <span class="keyword">typename</span> Idx<span class="special">></span>
<span class="identifier">Cont</span><span class="special">::</span><span class="identifier">const_reference</span> <a name="idp358143200-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Cont</span> <span class="keyword">const</span> <span class="special">&</span> c<span class="special">,</span> <span class="identifier">Idx</span> idx<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</li>
</ol></div>
</div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2007 Eric Niebler<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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>)
</p>
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