/a>
</h2></div></div></div>
<p>
      Identifiers are the low-level data types which macro programmers use to pass
      preprocessing data most often. As we have seen VMD has a system for registering
      and detecting identifiers so that they can be parsed as part of preprocessor
      data. This system also includes comparing identifiers for equality or inequality
      using BOOST_VMD_EQUAL/BOOST_VMD_NOT_EQUAL and matching identifiers using identifier
      modifiers in BOOST_VMD_IS_IDENTIFIER and BOOS