forked from boostorg/fusion
introduces documentation for deduce / deduce_sequence
[SVN r36813]
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>find</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="none.html" title="none">
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<div class="titlepage"><div><div><h5 class="title">
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<a name="fusion.algorithms.query.functions.find"></a><a href="find.html" title="find">find</a></h5></div></div></div>
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<a name="fusion.algorithms.query.functions.find.description"></a><h6>
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<a name="id561623"></a>
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<a name="id1107060"></a>
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<a href="find.html#fusion.algorithms.query.functions.find.description">Description</a>
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</h6>
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<p>
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Finds the first element of a given type within a sequence.
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</p>
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<a name="fusion.algorithms.query.functions.find.synopsis"></a><h6>
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<a name="id561655"></a>
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<a name="id1107089"></a>
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<a href="find.html#fusion.algorithms.query.functions.find.synopsis">Synopsis</a>
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</h6>
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<pre class="programlisting">
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<span class="emphasis"><em>unspecified</em></span> <span class="identifier">find</span><span class="special">(</span><span class="identifier">Sequence</span><span class="special">&</span> <span class="identifier">seq</span><span class="special">);</span>
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</pre>
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<div class="table">
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<a name="id561853"></a><p class="title"><b>Table<EFBFBD>1.41.<2E>Parameters</b></p>
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<a name="id1107262"></a><p class="title"><b>Table<EFBFBD>1.41.<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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</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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<td>The 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 search for</td>
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</table>
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</div>
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<a name="fusion.algorithms.query.functions.find.expression_semantics"></a><h6>
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<a name="id561947"></a>
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<a name="id1107345"></a>
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<a href="find.html#fusion.algorithms.query.functions.find.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="find.html" title="find"><tt class="computeroutput"><span class="identifier">find</span></tt></a><span class="special"><</span><span class="identifier">T</span><span class="special">>(</span><span class="identifier">seq</span><span class="special">)</span>
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<a href="find.html" title="find"><code class="computeroutput"><span class="identifier">find</span></code></a><span class="special"><</span><span class="identifier">T</span><span class="special">>(</span><span class="identifier">seq</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>: A model of the same iterator
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category as the iterators of <tt class="computeroutput"><span class="identifier">seq</span></tt>.
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<span class="bold"><strong>Return type</strong></span>: A model of the same iterator
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category as the iterators of <code class="computeroutput"><span class="identifier">seq</span></code>.
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</p>
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<p>
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<span class="bold"><b>Semantics</b></span>: Returns an iterator to the
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first element of <tt class="computeroutput"><span class="identifier">seq</span></tt>
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of type <tt class="computeroutput"><span class="identifier">T</span></tt>, or <tt class="computeroutput"><a href="../../../sequences/intrinsics/functions/end.html" title="end"><tt class="computeroutput"><span class="identifier">end</span></tt></a><span class="special">(</span><span class="identifier">seq</span><span class="special">)</span></tt> if there is no such element. Equivalent
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to <tt class="computeroutput"><a href="find_if.html" title="find_if"><tt class="computeroutput"><span class="identifier">find_if</span></tt></a><span class="special"><</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_same</span><span class="special"><</span><span class="identifier">_</span><span class="special">,</span> <span class="identifier">T</span><span class="special">></span> <span class="special">>(</span><span class="identifier">seq</span><span class="special">)</span></tt>
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<span class="bold"><strong>Semantics</strong></span>: Returns an iterator to the
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first element of <code class="computeroutput"><span class="identifier">seq</span></code>
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of type <code class="computeroutput"><span class="identifier">T</span></code>, or <code class="computeroutput"><a href="../../../sequences/intrinsics/functions/end.html" title="end"><code class="computeroutput"><span class="identifier">end</span></code></a><span class="special">(</span><span class="identifier">seq</span><span class="special">)</span></code> if there is no such element. Equivalent
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to <code class="computeroutput"><a href="find_if.html" title="find_if"><code class="computeroutput"><span class="identifier">find_if</span></code></a><span class="special"><</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_same</span><span class="special"><</span><span class="identifier">_</span><span class="special">,</span> <span class="identifier">T</span><span class="special">></span> <span class="special">>(</span><span class="identifier">seq</span><span class="special">)</span></code>
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</p>
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<a name="fusion.algorithms.query.functions.find.complexity"></a><h6>
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<a name="id562192"></a>
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<a name="id1107563"></a>
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<a href="find.html#fusion.algorithms.query.functions.find.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.find.header"></a><h6>
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<a name="id562275"></a>
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<a name="id1107636"></a>
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<a href="find.html#fusion.algorithms.query.functions.find.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">find</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.find.example"></a><h6>
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<a name="id562379"></a>
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<a name="id1107727"></a>
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<a href="find.html#fusion.algorithms.query.functions.find.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">char</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="char">'a'</span><span class="special">,</span><span class="char">'0'</span><span class="special">);</span>
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<span class="identifier">assert</span><span class="special">(*</span><a href="find.html" title="find"><tt class="computeroutput"><span class="identifier">find</span></tt></a><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="identifier">vec</span><span class="special">)</span> <span class="special">==</span> <span class="char">'0'</span><span class="special">);</span>
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<span class="identifier">assert</span><span class="special">(</span><a href="find.html" title="find"><tt class="computeroutput"><span class="identifier">find</span></tt></a><span class="special"><</span><span class="keyword">double</span><span class="special">>(</span><span class="identifier">vec</span><span class="special">)</span> <span class="special">==</span> <a href="../../../sequences/intrinsics/functions/end.html" title="end"><tt class="computeroutput"><span class="identifier">end</span></tt></a><span class="special">(</span><span class="identifier">vec</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">char</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="char">'a'</span><span class="special">,</span><span class="char">'0'</span><span class="special">);</span>
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<span class="identifier">assert</span><span class="special">(*</span><a href="find.html" title="find"><code class="computeroutput"><span class="identifier">find</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="identifier">vec</span><span class="special">)</span> <span class="special">==</span> <span class="char">'0'</span><span class="special">);</span>
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<span class="identifier">assert</span><span class="special">(</span><a href="find.html" title="find"><code class="computeroutput"><span class="identifier">find</span></code></a><span class="special"><</span><span class="keyword">double</span><span class="special">>(</span><span class="identifier">vec</span><span class="special">)</span> <span class="special">==</span> <a href="../../../sequences/intrinsics/functions/end.html" title="end"><code class="computeroutput"><span class="identifier">end</span></code></a><span class="special">(</span><span class="identifier">vec</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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