A metafunction which checks whether the member 'type' returned from invoking the macro metafunction generated by BOOST_TTI_MEMBER_TYPE ( BOOST_TTI_TRAIT_MEMBER_TYPE ) is a valid type.
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template<class BOOST_TTI_TP_T, class BOOST_TTI_TP_MARKER_TYPE = BOOST_TTI_NAMESPACE::detail::notype>
struct boost::tti::valid_member_type< BOOST_TTI_TP_T, BOOST_TTI_TP_MARKER_TYPE >
A metafunction which checks whether the member 'type' returned from invoking the macro metafunction generated by BOOST_TTI_MEMBER_TYPE ( BOOST_TTI_TRAIT_MEMBER_TYPE ) is a valid type.
template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_MARKER_TYPE = boost::tti::detail::notype> struct valid_member_type { static const value = unspecified; typedef mpl::bool_<true-or-false> type; };
The metafunction types and return:
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.
returns = 'value' is true if the type is valid, otherwise 'value' is false. A valid type means that the returned inner 'type' is not the marker type.