| /*-----------------------------------------------------------------------------+ |
| Copyright (c) 2008-2009: 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_SIZE_TYPE_OF_HPP_JOFA_080911 |
| #define BOOST_ICL_TYPE_TRAITS_SIZE_TYPE_OF_HPP_JOFA_080911 |
| |
| #include <boost/mpl/has_xxx.hpp> |
| #include <boost/icl/type_traits/difference_type_of.hpp> |
| |
| namespace boost{ namespace icl |
| { |
| |
| namespace detail |
| { |
| BOOST_MPL_HAS_XXX_TRAIT_DEF(size_type) |
| } |
| |
| //-------------------------------------------------------------------------- |
| template <class Type> |
| struct has_size_type |
| : mpl::bool_<detail::has_size_type<Type>::value> |
| {}; |
| |
| //-------------------------------------------------------------------------- |
| template <class Type, bool has_size, bool has_diff, bool has_rep> |
| struct get_size_type; |
| |
| template <class Type> |
| struct get_size_type<Type, false, false, false> |
| { |
| typedef std::size_t type; |
| }; |
| |
| template <class Type, bool has_diff, bool has_rep> |
| struct get_size_type<Type, true, has_diff, has_rep> |
| { |
| typedef typename Type::size_type type; |
| }; |
| |
| template <class Type, bool has_rep> |
| struct get_size_type<Type, false, true, has_rep> |
| { |
| typedef typename Type::difference_type type; |
| }; |
| |
| template <class Type> |
| struct get_size_type<Type, false, false, true> |
| { |
| typedef Type type; |
| }; |
| |
| //-------------------------------------------------------------------------- |
| template<class Type> |
| struct size_type_of |
| { |
| typedef typename |
| get_size_type< Type |
| , has_size_type<Type>::value |
| , has_difference_type<Type>::value |
| , has_rep_type<Type>::value |
| >::type type; |
| }; |
| |
| }} // namespace boost icl |
| |
| #endif |
| |
| |