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<title>Macro BOOST_VMD_IS_SEQ</title>
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<h2><span class="refentrytitle">Macro BOOST_VMD_IS_SEQ</span></h2>
<p>BOOST_VMD_IS_SEQ &#8212; Determines if a sequence is a Boost PP seq. </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="header/boost/vmd/is_seq_hpp.html" title="Header &lt;boost/vmd/is_seq.hpp&gt;">boost/vmd/is_seq.hpp</a>&gt;

</span>BOOST_VMD_IS_SEQ(sequence)</pre></div>
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<a name="idm45529680655744"></a><h2>Description</h2>
<p>The macro checks that the sequence is a Boost PP seq. It returns 1 if it is a seq, else if returns 0.</p>
<p>sequence = a possible Boost PP seq</p>
<p>returns = 1 if it a seq, else returns 0.</p>
<p>A single set of parentheses, with a single element, is parsed as a tuple and not a seq. To be parsed as a seq the input needs to be more than one consecutive sets of parentheses, each with a single element of data. </p>
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