forked from boostorg/fusion
updates functional module: only two unfused variants, now
[SVN r51381]
This commit is contained in:
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>is_sequence</title>
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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="../support.html" title="Support">
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<link rel="prev" href="../support.html" title="Support">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="fusion.support.is_sequence"></a><a href="is_sequence.html" title="is_sequence">is_sequence</a></h3></div></div></div>
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<a name="fusion.support.is_sequence.description"></a><h4>
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<a name="id459766"></a>
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<a name="id938474"></a>
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<a href="is_sequence.html#fusion.support.is_sequence.description">Description</a>
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</h4>
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<p>
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Metafunction that evaluates to <tt class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></tt>
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if a certain type <tt class="computeroutput"><span class="identifier">T</span></tt> is a
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conforming Fusion <a href="../sequence.html" title="Sequence">Sequence</a>, <tt class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></tt>
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Metafunction that evaluates to <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code>
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if a certain type <code class="computeroutput"><span class="identifier">T</span></code> is a
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conforming Fusion <a href="../sequence.html" title="Sequence">Sequence</a>, <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></code>
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otherwise. This may be specialized to accomodate clients which provide Fusion
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conforming sequences.
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</p>
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<a name="fusion.support.is_sequence.synopsis"></a><h4>
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<a name="id459859"></a>
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<a name="id938557"></a>
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<a href="is_sequence.html#fusion.support.is_sequence.synopsis">Synopsis</a>
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</h4>
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<pre class="programlisting">
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<span class="keyword">namespace</span> <span class="identifier">traits</span>
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<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">traits</span>
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<span class="special">{</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">is_sequence</span>
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@ -51,7 +50,7 @@
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<span class="special">}</span>
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</pre>
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<a name="fusion.support.is_sequence.parameters"></a><h4>
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<a name="id459990"></a>
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<a name="id938672"></a>
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<a href="is_sequence.html#fusion.support.is_sequence.parameters">Parameters</a>
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</h4>
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<div class="informaltable"><table class="table">
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<tbody><tr>
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<td>
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<p>
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<tt class="computeroutput"><span class="identifier">T</span></tt>
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<code class="computeroutput"><span class="identifier">T</span></code>
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</p>
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</td>
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<td>
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</tr></tbody>
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</table></div>
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<a name="fusion.support.is_sequence.expression_semantics"></a><h4>
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<a name="id460096"></a>
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<a name="id938765"></a>
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<a href="is_sequence.html#fusion.support.is_sequence.expression_semantics">Expression
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Semantics</a>
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</h4>
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<pre class="programlisting">
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<span class="keyword">typedef</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">c</span><span class="special">;</span>
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<pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">c</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>: An <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>: An <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
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Boolean Constant</a>.
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</p>
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<p>
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<span class="bold"><b>Semantics</b></span>: Metafunction that evaluates to
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<tt class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></tt> if a certain type <tt class="computeroutput"><span class="identifier">T</span></tt>
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is a conforming Fusion sequence, <tt class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></tt>
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<span class="bold"><strong>Semantics</strong></span>: Metafunction that evaluates to
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<code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code> if a certain type <code class="computeroutput"><span class="identifier">T</span></code>
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is a conforming Fusion sequence, <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></code>
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otherwise.
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</p>
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<a name="fusion.support.is_sequence.header"></a><h4>
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<a name="id460267"></a>
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<a name="id938915"></a>
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<a href="is_sequence.html#fusion.support.is_sequence.header">Header</a>
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</h4>
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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">support</span><span class="special">/</span><span class="identifier">is_sequence</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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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">support</span><span class="special">/</span><span class="identifier">is_sequence</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">is_sequence</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.support.is_sequence.example"></a><h4>
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<a name="id460424"></a>
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<a name="id939052"></a>
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<a href="is_sequence.html#fusion.support.is_sequence.example">Example</a>
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</h4>
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<pre class="programlisting">
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<span class="identifier">BOOST_MPL_ASSERT_NOT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">></span> <span class="special">));</span>
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<pre class="programlisting"><span class="identifier">BOOST_MPL_ASSERT_NOT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT_NOT</span><span class="special">((</span> <span class="identifier">is_sequence</span><span class="special"><</span> <span class="keyword">int</span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><a href="../container/list.html" title="list"><tt class="computeroutput"><span class="identifier">list</span></tt></a><span class="special"><></span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><a href="../container/list.html" title="list"><tt class="computeroutput"><span class="identifier">list</span></tt></a><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><a href="../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><></span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</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="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><a href="../container/list.html" title="list"><code class="computeroutput"><span class="identifier">list</span></code></a><span class="special"><></span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><a href="../container/list.html" title="list"><code class="computeroutput"><span class="identifier">list</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><a href="../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><></span> <span class="special">></span> <span class="special">));</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_sequence</span><span class="special"><</span><a 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="special">></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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