forked from boostorg/fusion
adds documentation for functional module
[SVN r36959]
This commit is contained in:
Tobias Schwinger
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>count</title>
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<link rel="stylesheet" href="../../../../boostbook.css" type="text/css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
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<meta name="generator" content="DocBook XSL Stylesheets V1.68.1">
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<link rel="start" href="../../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<link rel="up" href="../functions.html" title="Functions">
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<link rel="prev" href="find_if.html" title="find_if">
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<div class="titlepage"><div><div><h5 class="title">
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<a name="fusion.algorithms.query.functions.count"></a><a href="count.html" title="count">count</a></h5></div></div></div>
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<a name="fusion.algorithms.query.functions.count.description"></a><h6>
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<a name="id565502"></a>
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<a name="id1108683"></a>
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<a href="count.html#fusion.algorithms.query.functions.count.description">Description</a>
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</h6>
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<p>
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Returns the number of elements of a given type within a sequence.
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</p>
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<a name="fusion.algorithms.query.functions.count.synopsis"></a><h6>
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<a name="id565533"></a>
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<a name="id1108712"></a>
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<a href="count.html#fusion.algorithms.query.functions.count.synopsis">Synopsis</a>
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</h6>
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<pre class="programlisting">
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@ -41,11 +41,11 @@
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<span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">,</span>
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<span class="keyword">typename</span> <span class="identifier">T</span>
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<span class="special">></span>
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<span class="keyword">typename</span> <a href="../metafunctions/count.html" title="count"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">count</span></tt></a><span class="special"><</span><span class="identifier">Sequence</span><span class="special">,</span> <span class="identifier">T</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">count</span><span class="special">(</span>
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<span class="keyword">typename</span> <a href="../metafunctions/count.html" title="count"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">count</span></code></a><span class="special"><</span><span class="identifier">Sequence</span><span class="special">,</span> <span class="identifier">T</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">count</span><span class="special">(</span>
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<span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">T</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">t</span><span class="special">);</span>
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</pre>
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<div class="table">
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<a name="id565740"></a><p class="title"><b>Table<EFBFBD>1.43.<2E>Parameters</b></p>
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<a name="id1108893"></a><p class="title"><b>Table<EFBFBD>1.43.<2E>Parameters</b></p>
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<table class="table" summary="Parameters">
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<colgroup>
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<col>
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@ -59,20 +59,20 @@
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</tr></thead>
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<tbody>
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<tr>
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<td><tt class="computeroutput"><span class="identifier">seq</span></tt></td>
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<td><code class="computeroutput"><span class="identifier">seq</span></code></td>
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<td>A
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model of <a href="../../../sequences/concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>, <tt class="computeroutput"><span class="identifier">e</span> <span class="special">==</span> <span class="identifier">t</span></tt>
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must be a valid expression, convertible to <tt class="computeroutput"><span class="keyword">bool</span></tt>,
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for each element <tt class="computeroutput"><span class="identifier">e</span></tt>
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in <tt class="computeroutput"><span class="identifier">seq</span></tt>
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Sequence</a>, <code class="computeroutput"><span class="identifier">e</span> <span class="special">==</span> <span class="identifier">t</span></code>
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must be a valid expression, convertible to <code class="computeroutput"><span class="keyword">bool</span></code>,
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for each element <code class="computeroutput"><span class="identifier">e</span></code>
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in <code class="computeroutput"><span class="identifier">seq</span></code>
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</td>
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<td>The
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sequence to search</td>
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</tr>
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<tr>
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<td><tt class="computeroutput"><span class="identifier">T</span></tt></td>
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<td><code class="computeroutput"><span class="identifier">T</span></code></td>
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<td>Any
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type</td>
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<td>The type to count</td>
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@ -81,42 +81,42 @@
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</table>
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</div>
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<a name="fusion.algorithms.query.functions.count.expression_semantics"></a><h6>
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<a name="id565888"></a>
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<a name="id1109024"></a>
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<a href="count.html#fusion.algorithms.query.functions.count.expression_semantics">Expression
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Semantics</a>
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</h6>
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<pre class="programlisting">
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<a href="count.html" title="count"><tt class="computeroutput"><span class="identifier">count</span></tt></a><span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">t</span><span class="special">);</span>
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<a href="count.html" title="count"><code class="computeroutput"><span class="identifier">count</span></code></a><span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">t</span><span class="special">);</span>
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</pre>
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<p>
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<span class="bold"><b>Return type</b></span>: <tt class="computeroutput"><span class="keyword">int</span></tt>
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<span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">int</span></code>
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</p>
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<p>
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<span class="bold"><b>Semantics</b></span>: Returns the number of elements
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of type <tt class="computeroutput"><span class="identifier">T</span></tt> and equal to
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<tt class="computeroutput"><span class="identifier">t</span></tt> in <tt class="computeroutput"><span class="identifier">seq</span></tt>.
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<span class="bold"><strong>Semantics</strong></span>: Returns the number of elements
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of type <code class="computeroutput"><span class="identifier">T</span></code> and equal to
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<code class="computeroutput"><span class="identifier">t</span></code> in <code class="computeroutput"><span class="identifier">seq</span></code>.
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</p>
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<a name="fusion.algorithms.query.functions.count.complexity"></a><h6>
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<a name="id566024"></a>
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<a name="id1109144"></a>
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<a href="count.html#fusion.algorithms.query.functions.count.complexity">Complexity</a>
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</h6>
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<p>
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Linear. At most <tt class="computeroutput"><a href="../../../sequences/intrinsics/metafunctions/size.html" title="size"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">size</span></tt></a><span class="special"><</span><span class="identifier">Sequence</span><span class="special">>::</span><span class="identifier">value</span></tt> comparisons.
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Linear. At most <code class="computeroutput"><a href="../../../sequences/intrinsics/metafunctions/size.html" title="size"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">size</span></code></a><span class="special"><</span><span class="identifier">Sequence</span><span class="special">>::</span><span class="identifier">value</span></code> comparisons.
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</p>
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<a name="fusion.algorithms.query.functions.count.header"></a><h6>
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<a name="id566107"></a>
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<a name="id1109217"></a>
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<a href="count.html#fusion.algorithms.query.functions.count.header">Header</a>
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</h6>
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<pre class="programlisting">
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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">algorithm</span><span class="special">/</span><span class="identifier">query</span><span class="special">/</span><span class="identifier">count</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.algorithms.query.functions.count.example"></a><h6>
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<a name="id566211"></a>
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<a name="id1109309"></a>
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<a href="count.html#fusion.algorithms.query.functions.count.example">Example</a>
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</h6>
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<pre class="programlisting">
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<span class="keyword">const</span> <a href="../../../sequences/containers/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><</span><span class="keyword">double</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="number">1.0</span><span class="special">,</span><span class="number">2</span><span class="special">,</span><span class="number">3</span><span class="special">);</span>
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<span class="identifier">assert</span><span class="special">(</span><a href="count.html" title="count"><tt class="computeroutput"><span class="identifier">count</span></tt></a><span class="special">(</span><span class="identifier">vec</span><span class="special">,</span><span class="number">2</span><span class="special">)</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
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<span class="keyword">const</span> <a href="../../../sequences/containers/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">double</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="number">1.0</span><span class="special">,</span><span class="number">2</span><span class="special">,</span><span class="number">3</span><span class="special">);</span>
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<span class="identifier">assert</span><span class="special">(</span><a href="count.html" title="count"><code class="computeroutput"><span class="identifier">count</span></code></a><span class="special">(</span><span class="identifier">vec</span><span class="special">,</span><span class="number">2</span><span class="special">)</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
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</pre>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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