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| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="fusion.iterator.functions.advance"></a><a class="link" href="advance.html" title="advance">advance</a> |
| </h4></div></div></div> |
| <a name="fusion.iterator.functions.advance.description"></a><h6> |
| <a name="id853088"></a> |
| <a class="link" href="advance.html#fusion.iterator.functions.advance.description">Description</a> |
| </h6> |
| <p> |
| Moves an iterator by a specified distance. |
| </p> |
| <a name="fusion.iterator.functions.advance.synopsis"></a><h6> |
| <a name="id853106"></a> |
| <a class="link" href="advance.html#fusion.iterator.functions.advance.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">typename</span> <span class="identifier">M</span> |
| <span class="special">></span> |
| <span class="keyword">typename</span> <a class="link" href="../metafunctions/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">M</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">advance</span><span class="special">(</span><span class="identifier">I</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">i</span><span class="special">);</span> |
| </pre> |
| <div class="table"> |
| <a name="id853775"></a><p class="title"><b>Table 1.6. 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> |
| An <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL |
| Integral Constant</a> |
| </p> |
| </td> |
| <td> |
| <p> |
| Number of positions to move |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <br class="table-break"><a name="fusion.iterator.functions.advance.expression_semantics"></a><h6> |
| <a name="id853898"></a> |
| <a class="link" href="advance.html#fusion.iterator.functions.advance.expression_semantics">Expression |
| Semantics</a> |
| </h6> |
| <pre class="programlisting"><a class="link" href="advance.html" title="advance"><code class="computeroutput"><span class="identifier">advance</span></code></a><span class="special"><</span><span class="identifier">M</span><span class="special">>(</span><span class="identifier">i</span><span class="special">);</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 to the |
| element <code class="computeroutput"><span class="identifier">M</span></code> positions 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">M</span></code> |
| may be negative. |
| </p> |
| <a name="fusion.iterator.functions.advance.header"></a><h6> |
| <a name="id854000"></a> |
| <a class="link" href="advance.html#fusion.iterator.functions.advance.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.functions.advance.example"></a><h6> |
| <a name="id854108"></a> |
| <a class="link" href="advance.html#fusion.iterator.functions.advance.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">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">vec</span><span class="special">;</span> |
| |
| <span class="identifier">vec</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> |
| <span class="identifier">assert</span><span class="special">(</span><a class="link" href="deref.html" title="deref"><code class="computeroutput"><span class="identifier">deref</span></code></a><span class="special">(</span><a class="link" href="advance.html" title="advance"><code class="computeroutput"><span class="identifier">advance</span></code></a><span class="special"><</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">int_</span><span class="special"><</span><span class="number">2</span><span class="special">></span> <span class="special">>(</span><a class="link" href="../../sequence/intrinsic/functions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">begin</span></code></a><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> |
| </pre> |
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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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