boost/tti/detail/dmem_type.hpp

   1
   2 //  (C) Copyright Edward Diener 2011,2012,2013
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6
   7 #if !defined(BOOST_TTI_DETAIL_MEM_TYPE_HPP)
   8 #define BOOST_TTI_DETAIL_MEM_TYPE_HPP
   9
  10 #include <boost/config.hpp>
  11 #include <boost/mpl/bool.hpp>
  12 #include <boost/mpl/eval_if.hpp>
  13 #include <boost/mpl/has_xxx.hpp>
  14 #include <boost/preprocessor/cat.hpp>
  15 #include <boost/type_traits/is_class.hpp>
  16
  17 #define BOOST_TTI_DETAIL_TRAIT_HAS_TYPE_MEMBER_TYPE_OP(trait,name) \
  18   BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(BOOST_PP_CAT(trait,_detail_mpl), name, false) \
  19   template<class BOOST_TTI_DETAIL_TP_T> \
  20   struct BOOST_PP_CAT(trait,_detail_op) : \
  21     BOOST_PP_CAT(trait,_detail_mpl)<BOOST_TTI_DETAIL_TP_T> \
  22     { \
  23     }; \
  24 /**/
  25
  26 #define BOOST_TTI_DETAIL_TRAIT_HAS_TYPE_MEMBER_TYPE(trait,name) \
  27   BOOST_TTI_DETAIL_TRAIT_HAS_TYPE_MEMBER_TYPE_OP(trait,name) \
  28   template<class BOOST_TTI_DETAIL_TP_T> \
  29   struct BOOST_PP_CAT(trait,_detail) \
  30     { \
  31     typedef typename \
  32     boost::mpl::eval_if \
  33         < \
  34         boost::is_class<BOOST_TTI_DETAIL_TP_T>, \
  35         BOOST_PP_CAT(trait,_detail_op)<BOOST_TTI_DETAIL_TP_T>, \
  36         boost::mpl::false_ \
  37         >::type type; \
  38     \
  39     BOOST_STATIC_CONSTANT(bool,value=type::value); \
  40     }; \
  41 /**/
  42
  43 #define BOOST_TTI_DETAIL_TRAIT_MEMBER_TYPE(trait,name) \
  44   template<class BOOST_TTI_DETAIL_TP_T> \
  45   struct BOOST_PP_CAT(trait,_detail_member_type) \
  46     { \
  47     typedef typename BOOST_TTI_DETAIL_TP_T::name type; \
  48     }; \
  49 /**/
  50
  51 #endif // BOOST_TTI_DETAIL_MEM_TYPE_HPP