identifier">mpl</span><span class="special">::</span><span class="identifier">eval_if</span></code>
      type selection statements to get to some final condition where we know we can
      generate the compile-time code which we want.
    </p>
<h4>
<a name="the_type_traits_introspection_library.tti_nested_type.h1"></a>
      <span class="phrase"><a name="the_type_traits_introspection_library.tti_nested_type.the_solution"></a></span><a class="link" href="tti_nested_type.html#the_type_traits_introspection_li