| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>begin</title> |
| <link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> |
| <link rel="home" href="../../../../index.html" title="Chapter 1. Fusion 2.0"> |
| <link rel="up" href="../metafunctions.html" title="Metafunctions"> |
| <link rel="prev" href="../metafunctions.html" title="Metafunctions"> |
| <link rel="next" href="end.html" title="end"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table cellpadding="2" width="100%"><tr> |
| <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> |
| <td align="center"><a href="../../../../../../../../index.html">Home</a></td> |
| <td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td> |
| <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> |
| <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> |
| <td align="center"><a href="../../../../../../../../more/index.htm">More</a></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="../metafunctions.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.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="end.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="fusion.sequence.intrinsic.metafunctions.begin"></a><a class="link" href="begin.html" title="begin">begin</a> |
| </h5></div></div></div> |
| <a name="fusion.sequence.intrinsic.metafunctions.begin.description"></a><h6> |
| <a name="id888312"></a> |
| <a class="link" href="begin.html#fusion.sequence.intrinsic.metafunctions.begin.description">Description</a> |
| </h6> |
| <p> |
| Returns the result type of <a class="link" href="../functions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">begin</span></code></a>. |
| </p> |
| <a name="fusion.sequence.intrinsic.metafunctions.begin.synopsis"></a><h6> |
| <a name="id888341"></a> |
| <a class="link" href="begin.html#fusion.sequence.intrinsic.metafunctions.begin.synopsis">Synopsis</a> |
| </h6> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Seq</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">begin</span> |
| <span class="special">{</span> |
| <span class="keyword">typedef</span> <span class="emphasis"><em>unspecified</em></span> <span class="identifier">type</span><span class="special">;</span> |
| <span class="special">};</span> |
| </pre> |
| <div class="table"> |
| <a name="id888548"></a><p class="title"><b>Table 1.23. Parameters</b></p> |
| <div class="table-contents"><table class="table" summary="Parameters"> |
| <colgroup> |
| <col> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Parameter |
| </p> |
| </th> |
| <th> |
| <p> |
| Requirement |
| </p> |
| </th> |
| <th> |
| <p> |
| Description |
| </p> |
| </th> |
| </tr></thead> |
| <tbody><tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">Seq</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| A model of <a class="link" href="../../concepts/forward_sequence.html" title="Forward Sequence">Forward |
| Sequence</a> |
| </p> |
| </td> |
| <td> |
| <p> |
| Argument sequence |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <br class="table-break"><a name="fusion.sequence.intrinsic.metafunctions.begin.expression_semantics"></a><h6> |
| <a name="id888635"></a> |
| <a class="link" href="begin.html#fusion.sequence.intrinsic.metafunctions.begin.expression_semantics">Expression |
| Semantics</a> |
| </h6> |
| <pre class="programlisting"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span><span class="special"><</span><span class="identifier">Seq</span><span class="special">>::</span><span class="identifier">type</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Return type</strong></span>: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| A model of <a class="link" href="../../../iterator/concepts/forward_iterator.html" title="Forward Iterator">Forward |
| Iterator</a> if <code class="computeroutput"><span class="identifier">seq</span></code> |
| is a <a class="link" href="../../concepts/forward_sequence.html" title="Forward Sequence">Forward |
| Sequence</a> else, <a class="link" href="../../../iterator/concepts/bidirectional_iterator.html" title="Bidirectional Iterator">Bidirectional |
| Iterator</a> if <code class="computeroutput"><span class="identifier">seq</span></code> |
| is a <a class="link" href="../../concepts/bidirectional_sequence.html" title="Bidirectional Sequence">Bidirectional |
| Sequence</a> else, <a class="link" href="../../../iterator/concepts/random_access_iterator.html" title="Random Access Iterator">Random |
| Access Iterator</a> if <code class="computeroutput"><span class="identifier">seq</span></code> |
| is a <a class="link" href="../../concepts/random_access_sequence.html" title="Random Access Sequence">Random |
| Access Sequence</a>. |
| </li> |
| <li class="listitem"> |
| A model of <a class="link" href="../../../iterator/concepts/associative_iterator.html" title="Associative Iterator">Associative |
| Iterator</a> if <code class="computeroutput"><span class="identifier">seq</span></code> |
| is an <a class="link" href="../../concepts/associative_sequence.html" title="Associative Sequence">Associative |
| Sequence</a>. |
| </li> |
| </ul></div> |
| <p> |
| <span class="bold"><strong>Semantics</strong></span>: Returns the type of an iterator |
| to the first element of <code class="computeroutput"><span class="identifier">Seq</span></code>. |
| </p> |
| <a name="fusion.sequence.intrinsic.metafunctions.begin.header"></a><h6> |
| <a name="id888788"></a> |
| <a class="link" href="begin.html#fusion.sequence.intrinsic.metafunctions.begin.header">Header</a> |
| </h6> |
| <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">begin</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <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">begin</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <a name="fusion.sequence.intrinsic.metafunctions.begin.example"></a><h6> |
| <a name="id888903"></a> |
| <a class="link" href="begin.html#fusion.sequence.intrinsic.metafunctions.begin.example">Example</a> |
| </h6> |
| <pre class="programlisting"><span class="keyword">typedef</span> <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="identifier">vec</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <a class="link" href="begin.html" title="begin"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></code></a><span class="special"><</span><span class="identifier">vec</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">it</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"><</span><a class="link" href="../../../iterator/metafunctions/deref.html" title="deref"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">deref</span></code></a><span class="special"><</span><span class="identifier">it</span><span class="special">>::</span><span class="identifier">type</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&>))</span> |
| </pre> |
| </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 © 2001-2007 Joel de Guzman, Dan Marsden, Tobias |
| Schwinger<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> |
| </div></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="../metafunctions.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.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="end.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |