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<h2><span class="refentrytitle">Macro BOOST_VMD_IS_SEQ_D</span></h2>
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<p>BOOST_VMD_IS_SEQ_D — Determines if a sequence is a Boost PP seq. Re-entrant version. </p>
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<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="header/boost/vmd/is_seq_hpp.html" title="Header <boost/vmd/is_seq.hpp>">boost/vmd/is_seq.hpp</a>>
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</span>BOOST_VMD_IS_SEQ_D(d, sequence)</pre></div>
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<a name="idm45711064623568"></a><h2>Description</h2>
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<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>
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<p>d = The next available BOOST_PP_WHILE iteration. <br>
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sequence = a possible Boost PP seq</p>
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<p>returns = 1 if it a seq, else returns 0.</p>
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<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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