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Hartmut Kaiser
2009-09-25 00:21:53 +00:00
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doc/html/fusion/iterator/metafunctions/equal_to.html
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>equal_to</title>
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<div class="spirit-nav">
<a accesskey="p" href="prior.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="distance.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
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<div class="section" lang="en">
<div class="titlepage">
<div><div><h4 class="title">
<a name="fusion.iterator.metafunctions.equal_to"></a><a href="equal_to.html" title="equal_to">equal_to</a>
</h4></div></div>
<div></div>
</div>
<a name="fusion.iterator.metafunctions.equal_to.description"></a><h5>
<a name="id437799"></a>
<a href="equal_to.html#fusion.iterator.metafunctions.equal_to.description">Description</a>
</h5>
<div class="section" title="equal_to">
<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.iterator.metafunctions.equal_to"></a><a class="link" href="equal_to.html" title="equal_to">equal_to</a>
</h4></div></div></div>
<a name="fusion.iterator.metafunctions.equal_to.description"></a><h6>
<a name="id586206"></a>
<a class="link" href="equal_to.html#fusion.iterator.metafunctions.equal_to.description">Description</a>
</h6>
<p>
Returns a true-valued <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
Integral Constant</a> if <tt class="computeroutput"><span class="identifier">I</span></tt>
and <tt class="computeroutput"><span class="identifier">J</span></tt> are equal.
Integral Constant</a> if <code class="computeroutput"><span class="identifier">I</span></code>
and <code class="computeroutput"><span class="identifier">J</span></code> are equal.
</p>
<a name="fusion.iterator.metafunctions.equal_to.synopsis"></a><h5>
<a name="id437859"></a>
<a href="equal_to.html#fusion.iterator.metafunctions.equal_to.synopsis">Synopsis</a>
</h5>
<a name="fusion.iterator.metafunctions.equal_to.synopsis"></a><h6>
<a name="id586242"></a>
<a class="link" href="equal_to.html#fusion.iterator.metafunctions.equal_to.synopsis">Synopsis</a>
</h6>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
<span class="keyword">typename</span> <span class="identifier">I</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">J</span>
@ -52,69 +49,81 @@
<span class="special">};</span>
</pre>
<div class="table">
<a name="id437975"></a><p class="title"><b>Table<EFBFBD>1.15.<2E>Parameters</b></p>
<table class="table" summary="Parameters">
<a name="id586327"></a><p class="title"><b>Table<EFBFBD>1.15.<2E>Parameters</b></p>
<div class="table-contents"><table class="table" summary="Parameters">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th><p>
<th>
<p>
Parameter
</p></th>
<th><p>
</p>
</th>
<th>
<p>
Requirement
</p></th>
<th><p>
</p>
</th>
<th>
<p>
Description
</p></th>
</p>
</th>
</tr></thead>
<tbody><tr>
<td><p>
<tt class="computeroutput"><span class="identifier">I</span></tt>, <tt class="computeroutput"><span class="identifier">J</span></tt>
</p></td>
<td><p>
<td>
<p>
<code class="computeroutput"><span class="identifier">I</span></code>, <code class="computeroutput"><span class="identifier">J</span></code>
</p>
</td>
<td>
<p>
Any fusion iterators
</p></td>
<td><p>
</p>
</td>
<td>
<p>
Operation's arguments
</p></td>
</p>
</td>
</tr></tbody>
</table>
</table></div>
</div>
<a name="fusion.iterator.metafunctions.equal_to.expression_semantics"></a><h5>
<a name="id438078"></a>
<a href="equal_to.html#fusion.iterator.metafunctions.equal_to.expression_semantics">Expression
<br class="table-break"><a name="fusion.iterator.metafunctions.equal_to.expression_semantics"></a><h6>
<a name="id586414"></a>
<a class="link" href="equal_to.html#fusion.iterator.metafunctions.equal_to.expression_semantics">Expression
Semantics</a>
</h5>
<pre class="programlisting"><a href="equal_to.html" title="equal_to"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">equal_to</span></tt></a><span class="special">&lt;</span><span class="identifier">I</span><span class="special">,</span> <span class="identifier">J</span><span class="special">&gt;::</span><span class="identifier">type</span>
</h6>
<pre class="programlisting"><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">&lt;</span><span class="identifier">I</span><span class="special">,</span> <span class="identifier">J</span><span class="special">&gt;::</span><span class="identifier">type</span>
</pre>
<p>
<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
<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
Integral Constant</a>.
</p>
<p>
<span class="bold"><b>Semantics</b></span>: Returns <tt class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></tt>
if <tt class="computeroutput"><span class="identifier">I</span></tt> and <tt class="computeroutput"><span class="identifier">J</span></tt> are iterators to the same position.
Returns <tt class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></tt> otherwise.
<span class="bold"><strong>Semantics</strong></span>: Returns <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code>
if <code class="computeroutput"><span class="identifier">I</span></code> and <code class="computeroutput"><span class="identifier">J</span></code> are iterators to the same position.
Returns <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></code> otherwise.
</p>
<a name="fusion.iterator.metafunctions.equal_to.header"></a><h5>
<a name="id438284"></a>
<a href="equal_to.html#fusion.iterator.metafunctions.equal_to.header">Header</a>
</h5>
<a name="fusion.iterator.metafunctions.equal_to.header"></a><h6>
<a name="id586552"></a>
<a class="link" href="equal_to.html#fusion.iterator.metafunctions.equal_to.header">Header</a>
</h6>
<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">equal_to</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">equal_to</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.iterator.metafunctions.equal_to.example"></a><h5>
<a name="id438440"></a>
<a href="equal_to.html#fusion.iterator.metafunctions.equal_to.example">Example</a>
</h5>
<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">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">double</span><span class="special">&gt;</span> <span class="identifier">vec</span><span class="special">;</span>
<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">&lt;</span><span class="identifier">vec</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">first</span><span class="special">;</span>
<span class="keyword">typedef</span> <a href="../../sequence/intrinsic/metafunctions/end.html" title="end"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">end</span></tt></a><span class="special">&lt;</span><span class="identifier">vec</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">last</span><span class="special">;</span>
<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span><a href="equal_to.html" title="equal_to"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">equal_to</span></tt></a><span class="special">&lt;</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">first</span><span class="special">&gt;));</span>
<span class="identifier">BOOST_MPL_ASSERT_NOT</span><span class="special">((</span><a href="equal_to.html" title="equal_to"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">equal_to</span></tt></a><span class="special">&lt;</span><span class="identifier">first</span><span class="special">,</span><span class="identifier">last</span><span class="special">&gt;));</span>
<a name="fusion.iterator.metafunctions.equal_to.example"></a><h6>
<a name="id586660"></a>
<a class="link" href="equal_to.html#fusion.iterator.metafunctions.equal_to.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">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">double</span><span class="special">&gt;</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">&lt;</span><span class="identifier">vec</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">first</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="../../sequence/intrinsic/metafunctions/end.html" title="end"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">end</span></code></a><span class="special">&lt;</span><span class="identifier">vec</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">last</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">&lt;</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">first</span><span class="special">&gt;));</span>
<span class="identifier">BOOST_MPL_ASSERT_NOT</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">&lt;</span><span class="identifier">first</span><span class="special">,</span><span class="identifier">last</span><span class="special">&gt;));</span>
</pre>
</div>
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