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Editing: size_type_of.hpp
/*-----------------------------------------------------------------------------+ 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
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