forked from boostorg/fusion
Fusion: added nview and friends, docs and tests
[SVN r56377]
This commit is contained in:
Hartmut Kaiser
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>distance</title>
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<link rel="stylesheet" href="../../../../../../../doc/html/boostbook.css" type="text/css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.65.1">
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<meta name="generator" content="DocBook XSL Stylesheets V1.75.0">
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<link rel="home" href="../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<link rel="up" href="../metafunctions.html" title="Metafunctions">
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<link rel="previous" href="equal_to.html" title="equal_to">
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<link rel="prev" href="equal_to.html" title="equal_to">
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<link rel="next" href="advance.html" title="advance">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<div class="spirit-nav">
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<a accesskey="p" href="equal_to.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="advance.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
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</div>
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<div class="section" lang="en">
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<div class="titlepage">
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<div><div><h4 class="title">
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<a name="fusion.iterator.metafunctions.distance"></a><a href="distance.html" title="distance">distance</a>
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</h4></div></div>
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<div></div>
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</div>
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<a name="fusion.iterator.metafunctions.distance.description"></a><h5>
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<a name="id438801"></a>
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<a href="distance.html#fusion.iterator.metafunctions.distance.description">Description</a>
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</h5>
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<div class="section" title="distance">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="fusion.iterator.metafunctions.distance"></a><a class="link" href="distance.html" title="distance">distance</a>
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</h4></div></div></div>
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<a name="fusion.iterator.metafunctions.distance.description"></a><h6>
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<a name="id586902"></a>
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<a class="link" href="distance.html#fusion.iterator.metafunctions.distance.description">Description</a>
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</h6>
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<p>
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Returns the distance between two iterators.
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</p>
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<a name="fusion.iterator.metafunctions.distance.synopsis"></a><h5>
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<a name="id438830"></a>
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<a href="distance.html#fusion.iterator.metafunctions.distance.synopsis">Synopsis</a>
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</h5>
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<a name="fusion.iterator.metafunctions.distance.synopsis"></a><h6>
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<a name="id586920"></a>
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<a class="link" href="distance.html#fusion.iterator.metafunctions.distance.synopsis">Synopsis</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><span class="special">,</span>
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<span class="keyword">typename</span> <span class="identifier">J</span>
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@ -50,71 +47,82 @@
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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="id438946"></a><p class="title"><b>Table<EFBFBD>1.16.<2E>Parameters</b></p>
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<table class="table" summary="Parameters">
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<a name="id587005"></a><p class="title"><b>Table<EFBFBD>1.16.<2E>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><p>
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<th>
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<p>
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Parameter
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</p></th>
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<th><p>
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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></th>
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<th><p>
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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></th>
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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><p>
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<tt class="computeroutput"><span class="identifier">I</span></tt>, <tt class="computeroutput"><span class="identifier">J</span></tt>
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</p></td>
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<td><p>
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Models of <a href="../concepts/forward_iterator.html" title="Forward
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Iterator">Forward
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">I</span></code>, <code class="computeroutput"><span class="identifier">J</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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Models of <a class="link" href="../concepts/forward_iterator.html" title="Forward Iterator">Forward
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Iterator</a> into the same sequence
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</p></td>
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<td><p>
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</p>
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</td>
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<td>
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<p>
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The start and end points of the distance to be measured
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</p></td>
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</p>
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</td>
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</tr></tbody>
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</table>
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</table></div>
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</div>
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<a name="fusion.iterator.metafunctions.distance.expression_semantics"></a><h5>
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<a name="id439058"></a>
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<a href="distance.html#fusion.iterator.metafunctions.distance.expression_semantics">Expression
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<br class="table-break"><a name="fusion.iterator.metafunctions.distance.expression_semantics"></a><h6>
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<a name="id587097"></a>
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<a class="link" href="distance.html#fusion.iterator.metafunctions.distance.expression_semantics">Expression
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Semantics</a>
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</h5>
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<pre class="programlisting"><a href="distance.html" title="distance"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">distance</span></tt></a><span class="special"><</span><span class="identifier">I</span><span class="special">,</span> <span class="identifier">J</span><span class="special">>::</span><span class="identifier">type</span>
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</h6>
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<pre class="programlisting"><a class="link" href="distance.html" title="distance"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">distance</span></code></a><span class="special"><</span><span class="identifier">I</span><span class="special">,</span> <span class="identifier">J</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"><b>Return type</b></span>: A model of <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
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<span class="bold"><strong>Return type</strong></span>: A model of <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
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Integral Constant</a>.
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</p>
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<p>
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<span class="bold"><b>Semantics</b></span>: Returns the distance between
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iterators of types <tt class="computeroutput"><span class="identifier">I</span></tt> and
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<tt class="computeroutput"><span class="identifier">J</span></tt>.
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<span class="bold"><strong>Semantics</strong></span>: Returns the distance between
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iterators of types <code class="computeroutput"><span class="identifier">I</span></code> and
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<code class="computeroutput"><span class="identifier">J</span></code>.
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</p>
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<a name="fusion.iterator.metafunctions.distance.header"></a><h5>
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<a name="id439201"></a>
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<a href="distance.html#fusion.iterator.metafunctions.distance.header">Header</a>
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</h5>
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<a name="fusion.iterator.metafunctions.distance.header"></a><h6>
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<a name="id587193"></a>
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<a class="link" href="distance.html#fusion.iterator.metafunctions.distance.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">distance</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">distance</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.distance.example"></a><h5>
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<a name="id439357"></a>
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<a href="distance.html#fusion.iterator.metafunctions.distance.example">Example</a>
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</h5>
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<pre class="programlisting"><span class="keyword">typedef</span> <a href="../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></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>
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<span class="keyword">typedef</span> <a href="../../sequence/intrinsic/metafunctions/begin.html" title="begin"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></tt></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>
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<span class="keyword">typedef</span> <a href="next.html" title="next"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></tt></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>
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<span class="keyword">typedef</span> <a href="next.html" title="next"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></tt></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>
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<span class="keyword">typedef</span> <a href="distance.html" title="distance"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">distance</span></tt></a><span class="special"><</span><span class="identifier">first</span><span class="special">,</span><span class="identifier">third</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">dist</span><span class="special">;</span>
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<a name="fusion.iterator.metafunctions.distance.example"></a><h6>
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<a name="id587301"></a>
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<a class="link" href="distance.html#fusion.iterator.metafunctions.distance.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="keyword">char</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="../../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>
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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><span class="identifier">first</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="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>
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<span class="keyword">typedef</span> <a class="link" href="distance.html" title="distance"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">distance</span></code></a><span class="special"><</span><span class="identifier">first</span><span class="special">,</span><span class="identifier">third</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">dist</span><span class="special">;</span>
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<span class="identifier">BOOST_MPL_ASSERT_RELATION</span><span class="special">(</span><span class="identifier">dist</span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="special">==,</span> <span class="number">2</span><span class="special">);</span>
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</pre>
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