8608"></a><h2>Description</h2>
<p>The macro checks that the sequence is a pplib list. It returns 1 if it is a list, else if returns 0.</p>
<p>d = The next available BOOST_PP_WHILE iteration. sequence = input as a possible Boost PP list.</p>
<p>returns = 1 if it a list, else returns 0.</p>
<p>The macro will generate a preprocessing error if the input is in the form of a list but its end-of-list marker, instead of being an identifier, is a preprocessor token which VMD cannot parse, as in the example '(anythin