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<link rel="home" href="../../../index.html" title="Chapter 1. Fusion 2.0">
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<a accesskey="p" href="deref.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="prior.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
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<div class="section">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="fusion.iterator.metafunctions.next"></a><a class="link" href="next.html" title="next">next</a>
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</h4></div></div></div>
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<a name="fusion.iterator.metafunctions.next.description"></a><h6>
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<a name="id822782"></a>
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<a class="link" href="next.html#fusion.iterator.metafunctions.next.description">Description</a>
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</h6>
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<p>
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Returns the type of the next iterator in a sequence.
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</p>
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<a name="fusion.iterator.metafunctions.next.synposis"></a><h6>
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<a name="id822799"></a>
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<a class="link" href="next.html#fusion.iterator.metafunctions.next.synposis">Synposis</a>
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</h6>
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<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
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<span class="keyword">typename</span> <span class="identifier">I</span>
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<span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">next</span>
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<span class="special">{</span>
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<span class="keyword">typedef</span> <span class="emphasis"><em>unspecified</em></span> <span class="identifier">type</span><span class="special">;</span>
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<span class="special">};</span>
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</pre>
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<div class="table">
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<a name="id822871"></a><p class="title"><b>Table 1.14. Parameters</b></p>
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<div class="table-contents"><table class="table" summary="Parameters">
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<colgroup>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Parameter
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</p>
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</th>
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<th>
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<p>
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Requirement
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</p>
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</th>
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<th>
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<p>
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Description
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</p>
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</th>
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</tr></thead>
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<tbody><tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">I</span></code>
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</p>
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</td>
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<td>
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<p>
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Model of <a class="link" href="../concepts/forward_iterator.html" title="Forward Iterator">Forward
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Iterator</a>
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</p>
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</td>
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<td>
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<p>
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Operation's argument
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</p>
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</td>
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</tr></tbody>
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</table></div>
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</div>
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<br class="table-break"><a name="fusion.iterator.metafunctions.next.expression_semantics"></a><h6>
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<a name="id822959"></a>
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<a class="link" href="next.html#fusion.iterator.metafunctions.next.expression_semantics">Expression
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Semantics</a>
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</h6>
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<pre class="programlisting"><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">I</span><span class="special">>::</span><span class="identifier">type</span>
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</pre>
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<p>
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<span class="bold"><strong>Return type</strong></span>: A model of the same iterator
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concept as <code class="computeroutput"><span class="identifier">I</span></code>.
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</p>
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<p>
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<span class="bold"><strong>Semantics</strong></span>: Returns an iterator to the
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next element in the sequence after <code class="computeroutput"><span class="identifier">I</span></code>.
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</p>
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<a name="fusion.iterator.metafunctions.next.header"></a><h6>
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<a name="id823038"></a>
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<a class="link" href="next.html#fusion.iterator.metafunctions.next.header">Header</a>
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</h6>
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<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">next</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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<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">next</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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</pre>
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<a name="fusion.iterator.metafunctions.next.example"></a><h6>
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<a name="id823147"></a>
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<a class="link" href="next.html#fusion.iterator.metafunctions.next.example">Example</a>
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</h6>
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<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="identifier">vec</span><span class="special">;</span>
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<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><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="special">>::</span><span class="identifier">type</span> <span class="identifier">second</span><span class="special">;</span>
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<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="value_of.html" title="value_of"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">value_of</span></code></a><span class="special"><</span><span class="identifier">second</span><span class="special">>::</span><span class="identifier">type</span><span class="special">,</span> <span class="keyword">double</span><span class="special">>));</span>
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</pre>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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