williamr@4: // © Copyright Fernando Luis Cacciola Carballal 2000-2004 williamr@4: // Use, modification, and distribution is subject to the Boost Software williamr@4: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at williamr@4: // http://www.boost.org/LICENSE_1_0.txt) williamr@4: williamr@4: // See library home page at http://www.boost.org/libs/numeric/conversion williamr@4: // williamr@4: // Contact the author at: fernando_cacciola@hotmail.com williamr@4: // williamr@4: #ifndef BOOST_NUMERIC_CONVERSION_DETAIL_CONVERSION_TRAITS_FLC_12NOV2002_HPP williamr@4: #define BOOST_NUMERIC_CONVERSION_DETAIL_CONVERSION_TRAITS_FLC_12NOV2002_HPP williamr@4: williamr@4: #include "boost/type_traits/is_arithmetic.hpp" williamr@4: #include "boost/type_traits/is_same.hpp" williamr@4: #include "boost/type_traits/remove_cv.hpp" williamr@4: williamr@4: #include "boost/numeric/conversion/detail/meta.hpp" williamr@4: #include "boost/numeric/conversion/detail/int_float_mixture.hpp" williamr@4: #include "boost/numeric/conversion/detail/sign_mixture.hpp" williamr@4: #include "boost/numeric/conversion/detail/udt_builtin_mixture.hpp" williamr@4: #include "boost/numeric/conversion/detail/is_subranged.hpp" williamr@4: williamr@4: namespace boost { namespace numeric { namespace convdetail williamr@4: { williamr@4: //------------------------------------------------------------------- williamr@4: // Implementation of the Conversion Traits for T != S williamr@4: // williamr@4: // This is a VISIBLE base class of the user-level conversion_traits<> class. williamr@4: //------------------------------------------------------------------- williamr@4: template williamr@4: struct non_trivial_traits_impl williamr@4: { williamr@4: typedef typename get_int_float_mixture ::type int_float_mixture ; williamr@4: typedef typename get_sign_mixture ::type sign_mixture ; williamr@4: typedef typename get_udt_builtin_mixture ::type udt_builtin_mixture ; williamr@4: williamr@4: typedef typename get_is_subranged::type subranged ; williamr@4: williamr@4: typedef mpl::false_ trivial ; williamr@4: williamr@4: typedef T target_type ; williamr@4: typedef S source_type ; williamr@4: typedef T result_type ; williamr@4: williamr@4: typedef typename mpl::if_< is_arithmetic, S, S const&>::type argument_type ; williamr@4: williamr@4: typedef typename mpl::if_::type supertype ; williamr@4: typedef typename mpl::if_::type subtype ; williamr@4: } ; williamr@4: williamr@4: //------------------------------------------------------------------- williamr@4: // Implementation of the Conversion Traits for T == S williamr@4: // williamr@4: // This is a VISIBLE base class of the user-level conversion_traits<> class. williamr@4: //------------------------------------------------------------------- williamr@4: template williamr@4: struct trivial_traits_impl williamr@4: { williamr@4: typedef typename get_int_float_mixture ::type int_float_mixture ; williamr@4: typedef typename get_sign_mixture ::type sign_mixture ; williamr@4: typedef typename get_udt_builtin_mixture::type udt_builtin_mixture ; williamr@4: williamr@4: typedef mpl::false_ subranged ; williamr@4: typedef mpl::true_ trivial ; williamr@4: williamr@4: typedef N target_type ; williamr@4: typedef N source_type ; williamr@4: typedef N const& result_type ; williamr@4: typedef N const& argument_type ; williamr@4: williamr@4: typedef N supertype ; williamr@4: typedef N subtype ; williamr@4: williamr@4: } ; williamr@4: williamr@4: //------------------------------------------------------------------- williamr@4: // Top level implementation selector. williamr@4: //------------------------------------------------------------------- williamr@4: template williamr@4: struct get_conversion_traits williamr@4: { williamr@4: typedef typename remove_cv::type target_type ; williamr@4: typedef typename remove_cv::type source_type ; williamr@4: williamr@4: typedef typename is_same::type is_trivial ; williamr@4: williamr@4: typedef trivial_traits_impl trivial_imp ; williamr@4: typedef non_trivial_traits_impl non_trivial_imp ; williamr@4: williamr@4: typedef typename mpl::if_::type type ; williamr@4: } ; williamr@4: williamr@4: } } } // namespace boost::numeric::convdetail williamr@4: williamr@4: #endif williamr@4: williamr@4: