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  28 <h2><span class="refentrytitle">Macro BOOST_VMD_IS_SEQ_D</span></h2>
  29 <p>BOOST_VMD_IS_SEQ_D &#8212; Determines if a sequence is a Boost PP seq. Re-entrant version. </p>
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  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <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;
  33
  34 </span>BOOST_VMD_IS_SEQ_D(d, sequence)</pre></div>
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  36 <a name="idm45529680649440"></a><h2>Description</h2>
  37 <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>
  38 <p>d = The next available BOOST_PP_WHILE iteration. sequence = a possible Boost PP seq</p>
  39 <p>returns = 1 if it a seq, else returns 0.</p>
  40 <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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