<span class="special">{</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
-<a name="idp89493968"></a><h2>Description</h2>
+<a name="idp100331696"></a><h2>Description</h2>
<p>template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_MARKER_TYPE = boost::tti::detail::notype> struct <a class="link" href="valid_member_type.html" title="Struct template valid_member_type">valid_member_type</a> { static const value = unspecified; typedef mpl::bool_<true-or-false> type; };</p>
<p>The metafunction types and return:</p>
<p>BOOST_TTI_TP_T = returned inner 'type' from invoking the macro metafunction generated by BOOST_TTI_MEMBER_TYPE ( BOOST_TTI_TRAIT_MEMBER_TYPE ). BOOST_TTI_TP_MARKER_TYPE = (optional) a type to use as the marker type. defaults to the internal boost::tti::detail::notype.</p>