</span>BOOST_TTI_TRAIT_HAS_TYPE(trait, name)</pre></div>
<div class="refsect1">
-<a name="idm45944205460000"></a><h2>Description</h2>
+<a name="idm45456560396352"></a><h2>Description</h2>
<p>BOOST_TTI_TRAIT_HAS_TYPE is a macro which expands to a metafunction. The metafunction tests whether an inner type with a particular name exists and, optionally, whether a lambda expression invoked with the inner type is true or not.</p>
<p>trait = the name of the metafunction within the tti namespace.</p>
<p>name = the name of the inner type.</p>