1 /*-----------------------------------------------------------------------------+ 2 Copyright (c) 2008-2009: Joachim Faulhaber 3 +------------------------------------------------------------------------------+ 4 Distributed under the Boost Software License, Version 1.0. 5 (See accompanying file LICENCE.txt or copy at 6 http://www.boost.org/LICENSE_1_0.txt) 7 +-----------------------------------------------------------------------------*/ 8 #ifndef BOOST_ICL_TYPE_TRAITS_REP_TYPE_OF_HPP_JOFA_110329 9 #define BOOST_ICL_TYPE_TRAITS_REP_TYPE_OF_HPP_JOFA_110329 10 11 #include <boost/config.hpp> // For macro BOOST_STATIC_CONSTANT 12 #include <boost/mpl/has_xxx.hpp> 13 #include <boost/mpl/or.hpp> 14 #include <boost/mpl/and.hpp> 15 #include <boost/mpl/not.hpp> 16 #include <boost/icl/type_traits/no_type.hpp> 17 18 namespace boost{ namespace icl 19 { 20 namespace detail 21 { 22 BOOST_MPL_HAS_XXX_TRAIT_DEF(rep) 23 } 24 25 //-------------------------------------------------------------------------- 26 template <class Type> 27 struct has_rep_type 28 : mpl::bool_<detail::has_rep<Type>::value> 29 {}; 30 31 template <class Rep, class Type> 32 struct represents // Rep represents Type; Type is_wrapper_of Rep 33 : mpl::bool_<detail::has_rep<Type>::value> 34 { 35 typedef represents type; 36 BOOST_STATIC_CONSTANT(bool, 37 value = (mpl::and_< has_rep_type<Type> 38 , is_same<typename Type::rep, Rep> >::value) 39 ); 40 }; 41 42 //-------------------------------------------------------------------------- 43 template <class Type, bool has_rep> 44 struct get_rep_type; 45 46 template <class Type> 47 struct get_rep_type<Type, false> 48 { 49 typedef no_type type; 50 }; 51 52 template <class Type> 53 struct get_rep_type<Type, true> 54 { 55 typedef typename Type::rep type; 56 }; 57 58 //-------------------------------------------------------------------------- 59 template<class Type> 60 struct rep_type_of 61 { 62 typedef typename 63 get_rep_type<Type, has_rep_type<Type>::value>::type type; 64 }; 65 66 }} // namespace boost icl 67 68 #endif 69 70 71