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<title>Iterator</title>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="fusion.iterator"></a><a class="link" href="iterator.html" title="Iterator">Iterator</a>
</h2></div></div></div>
<div class="toc"><dl>
<dt><span class="section"><a href="iterator/concepts.html">Concepts</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="iterator/concepts/forward_iterator.html">Forward
        Iterator</a></span></dt>
<dt><span class="section"><a href="iterator/concepts/bidirectional_iterator.html">Bidirectional
        Iterator</a></span></dt>
<dt><span class="section"><a href="iterator/concepts/random_access_iterator.html">Random
        Access Iterator</a></span></dt>
<dt><span class="section"><a href="iterator/concepts/associative_iterator.html">Associative
        Iterator</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="iterator/functions.html">Functions</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="iterator/functions/deref.html">deref</a></span></dt>
<dt><span class="section"><a href="iterator/functions/next.html">next</a></span></dt>
<dt><span class="section"><a href="iterator/functions/prior.html">prior</a></span></dt>
<dt><span class="section"><a href="iterator/functions/distance.html">distance</a></span></dt>
<dt><span class="section"><a href="iterator/functions/advance.html">advance</a></span></dt>
<dt><span class="section"><a href="iterator/functions/advance_c.html">advance_c</a></span></dt>
<dt><span class="section"><a href="iterator/functions/deref_data.html">deref_data</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="iterator/operator.html">Operator</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="iterator/operator/operator_unary_star.html">Operator
        *</a></span></dt>
<dt><span class="section"><a href="iterator/operator/operator_equality.html">Operator
        ==</a></span></dt>
<dt><span class="section"><a href="iterator/operator/operator_inequality.html">Operator
        !=</a></span></dt>
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<dt><span class="section"><a href="iterator/metafunctions.html">Metafunctions</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="iterator/metafunctions/value_of.html">value_of</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/deref.html">deref</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/next.html">next</a></span></dt>
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<dt><span class="section"><a href="iterator/metafunctions/equal_to.html">equal_to</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/distance.html">distance</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/advance.html">advance</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/advance_c.html">advance_c</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/key_of.html">key_of</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/value_of_data.html">value_of_data</a></span></dt>
<dt><span class="section"><a href="iterator/metafunctions/deref_data.html">deref_data</a></span></dt>
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<p>
      Like <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a> and
      <a href="http://en.wikipedia.org/wiki/Standard_Template_Library" target="_top">STL</a>,
      iterators are a fundamental concept in Fusion. As with <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a>
      and <a href="http://en.wikipedia.org/wiki/Standard_Template_Library" target="_top">STL</a>
      iterators describe positions, and provide access to data within an underlying
      <a class="link" href="sequence.html" title="Sequence">Sequence</a>.
    </p>
<h4>
<a name="fusion.iterator.h0"></a>
      <span><a name="fusion.iterator.header"></a></span><a class="link" href="iterator.html#fusion.iterator.header">Header</a>
    </h4>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</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">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</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">iterator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
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