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## Struct template valid_member_type

boost::tti::valid_member_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.

## Synopsis

    // In header: <boost/tti/member_type.hpp>

    template<typename BOOST_TTI_TP_T,
             typename BOOST_TTI_TP_MARKER_TYPE = BOOST_TTI_NAMESPACE::detail::notype>
    struct valid_member_type : public boost::mpl::not_< boost::is_same< BOOST_TTI_TP_T, BOOST_TTI_TP_MARKER_TYPE > >
    {
    };

## Description

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.