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| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="fusion.iterator.metafunctions.advance_c"></a><a class="link" href="advance_c.html" title="advance_c">advance_c</a> |
| </h4></div></div></div> |
| <a name="fusion.iterator.metafunctions.advance_c.description"></a><h6> |
| <a name="id863827"></a> |
| <a class="link" href="advance_c.html#fusion.iterator.metafunctions.advance_c.description">Description</a> |
| </h6> |
| <p> |
| Moves an iterator by a specified distance. |
| </p> |
| <a name="fusion.iterator.metafunctions.advance_c.synopsis"></a><h6> |
| <a name="id863845"></a> |
| <a class="link" href="advance_c.html#fusion.iterator.metafunctions.advance_c.synopsis">Synopsis</a> |
| </h6> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> |
| <span class="keyword">typename</span> <span class="identifier">I</span><span class="special">,</span> |
| <span class="keyword">int</span> <span class="identifier">N</span> |
| <span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">advance_c</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="id863930"></a><p class="title"><b>Table 1.19. 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">I</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Model of <a class="link" href="../concepts/forward_iterator.html" title="Forward Iterator">Forward |
| Iterator</a> |
| </p> |
| </td> |
| <td> |
| <p> |
| Iterator to move relative to |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">N</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Integer constant |
| </p> |
| </td> |
| <td> |
| <p> |
| Number of positions to move |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <br class="table-break"><a name="fusion.iterator.metafunctions.advance_c.expression_semantics"></a><h6> |
| <a name="id864052"></a> |
| <a class="link" href="advance_c.html#fusion.iterator.metafunctions.advance_c.expression_semantics">Expression |
| Semantics</a> |
| </h6> |
| <pre class="programlisting"><a class="link" href="advance_c.html" title="advance_c"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">advance_c</span></code></a><span class="special"><</span><span class="identifier">I</span><span class="special">,</span> <span class="identifier">N</span><span class="special">>::</span><span class="identifier">type</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Return type</strong></span>: A model of the same iterator |
| concept as <code class="computeroutput"><span class="identifier">I</span></code>. |
| </p> |
| <p> |
| <span class="bold"><strong>Semantics</strong></span>: Returns an iterator a distance |
| <code class="computeroutput"><span class="identifier">N</span></code> from <code class="computeroutput"><span class="identifier">I</span></code>. |
| If <code class="computeroutput"><span class="identifier">I</span></code> is a <a class="link" href="../concepts/bidirectional_iterator.html" title="Bidirectional Iterator">Bidirectional |
| Iterator</a> then <code class="computeroutput"><span class="identifier">N</span></code> |
| may be negative. Equivalent to <code class="computeroutput"><a class="link" href="advance.html" title="advance"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">advance</span></code></a><span class="special"><</span><span class="identifier">I</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"><</span><span class="identifier">N</span><span class="special">></span> <span class="special">>::</span><span class="identifier">type</span></code>. |
| </p> |
| <a name="fusion.iterator.metafunctions.advance_c.header"></a><h6> |
| <a name="id866422"></a> |
| <a class="link" href="advance_c.html#fusion.iterator.metafunctions.advance_c.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">iterator</span><span class="special">/</span><span class="identifier">advance</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">advance</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <a name="fusion.iterator.metafunctions.advance_c.example"></a><h6> |
| <a name="id866530"></a> |
| <a class="link" href="advance_c.html#fusion.iterator.metafunctions.advance_c.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="keyword">double</span><span class="special">,</span><span class="keyword">char</span><span class="special">></span> <span class="identifier">vec</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <a class="link" href="../../sequence/intrinsic/metafunctions/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">first</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <a class="link" href="next.html" title="next"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></code></a><span class="special"><</span><span class="identifier">first</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">second</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <a class="link" href="next.html" title="next"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></code></a><span class="special"><</span><span class="identifier">second</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">third</span><span class="special">;</span> |
| |
| <span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span><a class="link" href="equal_to.html" title="equal_to"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">equal_to</span></code></a><span class="special"><</span><a class="link" href="advance_c.html" title="advance_c"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">advance_c</span></code></a><span class="special"><</span><span class="identifier">first</span><span class="special">,</span> <span class="number">2</span><span class="special">>::</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">third</span><span class="special">>));</span> |
| </pre> |
| </div> |
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| <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>) |
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