 type of 'EnclosingType' then AType is the
      same type as 'ANamedType', otherwise AType is a marker type internal to the
      TTI library.
    </p>
<p>
      Now that we have explained the syntax of BOOST_TTI_MEMBER_TYPE we can now answer
      the question of why this functionality to create a 'type' exists when looking
      for a nested type of an enclosing type.
    </p>
<h4>
<a name="the_type_traits_introspection_library.tti_nested_type.h0"></a>
      <span class="phrase"><a name="the_type_traits_