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boost_fusion/doc/html/fusion/support/deduce_sequence.html
Joel de Guzman 1f2087092f Doc updates 
[SVN r39468]
2007-09-22 01:05:29 +00:00

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<div class="titlepage"><div><div><h3 class="title">
<a name="fusion.support.deduce_sequence"></a><a href="deduce_sequence.html" title="deduce_sequence">deduce_sequence</a></h3></div></div></div>
<a name="fusion.support.deduce_sequence.description"></a><h4>
<a name="id464492"></a>
<a href="deduce_sequence.html#fusion.support.deduce_sequence.description">Description</a>
</h4>
<p>
Applies <a href="../notes.html#fusion.notes.element_conversion"><span class="emphasis"><em>element
conversion</em></span></a> to each element in a <a href="../sequences/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>. The resulting type is a <a href="../sequences/concepts/random_access_sequence.html" title="Random
Access Sequence">Random
Access Sequence</a> that provides a converting constructor accepting the
original type as its argument.
</p>
<a name="fusion.support.deduce_sequence.header"></a><h4>
<a name="id464556"></a>
<a href="deduce_sequence.html#fusion.support.deduce_sequence.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">support</span><span class="special">/</span><span class="identifier">deduce_sequence</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.support.deduce_sequence.synopsis"></a><h4>
<a name="id464650"></a>
<a href="deduce_sequence.html#fusion.support.deduce_sequence.synopsis">Synopsis</a>
</h4>
<pre class="programlisting">
<span class="keyword">namespace</span> <span class="identifier">traits</span>
<span class="special">{</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Sequence</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">deduce_sequence</span>
<span class="special">{</span>
<span class="keyword">typedef</span> <span class="emphasis"><em>unspecified</em></span> <span class="identifier">type</span><span class="special">;</span>
<span class="special">};</span>
<span class="special">}</span>
</pre>
<a name="fusion.support.deduce_sequence.example"></a><h4>
<a name="id464781"></a>
<a href="deduce_sequence.html#fusion.support.deduce_sequence.example">Example</a>
</h4>
<pre class="programlisting">
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">holder</span>
<span class="special">{</span>
<span class="keyword">typename</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">deduce_sequence</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">element</span><span class="special">;</span>
<span class="identifier">holder</span><span class="special">(</span><span class="identifier">Seq</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a</span><span class="special">)</span>
<span class="special">:</span> <span class="identifier">element</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span>
<span class="special">{</span> <span class="special">}</span>
<span class="special">};</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">&gt;</span>
<span class="identifier">holder</span><span class="special">&lt;</span> <a href="../sequences/containers/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special">&lt;</span><span class="identifier">T0</span> <span class="keyword">const</span> <span class="special">&amp;,</span> <span class="identifier">T1</span> <span class="keyword">const</span> <span class="special">&amp;&gt;</span> <span class="special">&gt;</span>
<span class="identifier">make_holder</span><span class="special">(</span><span class="identifier">T0</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a0</span><span class="special">,</span> <span class="identifier">T1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">a1</span><span class="special">)</span>
<span class="special">{</span>
<span class="keyword">typedef</span> <a href="../sequences/containers/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special">&lt;</span><span class="identifier">T0</span> <span class="keyword">const</span> <span class="special">&amp;,</span> <span class="identifier">T1</span> <span class="keyword">const</span> <span class="special">&amp;&gt;</span> <span class="identifier">arg_vec_t</span><span class="special">;</span>
<span class="keyword">return</span> <span class="identifier">holder</span><span class="special">&lt;</span><span class="identifier">arg_vec_t</span><span class="special">&gt;(</span> <span class="identifier">arg_vec_t</span><span class="special">(</span><span class="identifier">a0</span><span class="special">,</span><span class="identifier">a1</span><span class="special">)</span> <span class="special">);</span>
<span class="special">}</span>
</pre>
<a name="fusion.support.deduce_sequence.see_also"></a><h4>
<a name="id465342"></a>
<a href="deduce_sequence.html#fusion.support.deduce_sequence.see_also">See also</a>
</h4>
<div class="itemizedlist"><ul type="disc"><li><a href="deduce.html" title="deduce"><tt class="computeroutput"><span class="identifier">deduce</span></tt></a></li></ul></div>
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