| /*-----------------------------------------------------------------------------+ |
| Copyright (c) 2010-2010: Joachim Faulhaber |
| +------------------------------------------------------------------------------+ |
| Distributed under the Boost Software License, Version 1.0. |
| (See accompanying file LICENCE.txt or copy at |
| http://www.boost.org/LICENSE_1_0.txt) |
| +-----------------------------------------------------------------------------*/ |
| #ifndef BOOST_ICL_TYPE_TRAITS_INTERVAL_TYPE_OF_HPP_JOFA_100910 |
| #define BOOST_ICL_TYPE_TRAITS_INTERVAL_TYPE_OF_HPP_JOFA_100910 |
| |
| #include <boost/mpl/has_xxx.hpp> |
| #include <boost/mpl/bool.hpp> |
| #include <boost/icl/type_traits/no_type.hpp> |
| |
| namespace boost{ namespace icl |
| { |
| namespace detail |
| { |
| BOOST_MPL_HAS_XXX_TRAIT_DEF(interval_type) |
| } |
| |
| template <class Type> |
| struct has_interval_type |
| : mpl::bool_<detail::has_interval_type<Type>::value> |
| {}; |
| |
| template <class Type, bool has_interval_type> |
| struct get_interval_type; |
| |
| template <class Type> |
| struct get_interval_type<Type, false> |
| { |
| typedef no_type type; |
| }; |
| |
| template <class Type> |
| struct get_interval_type<Type, true> |
| { |
| typedef typename Type::interval_type type; |
| }; |
| |
| template <class Type> |
| struct interval_type_of |
| { |
| typedef typename |
| get_interval_type<Type, has_interval_type<Type>::value>::type type; |
| }; |
| |
| }} // namespace boost icl |
| |
| #endif |
| |
| |