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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/numeric/conversion/detail/conversion_traits.hpp
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+// (c) Copyright Fernando Luis Cacciola Carballal 2000-2004
+// Use, modification, and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// See library home page at http://www.boost.org/libs/numeric/conversion
+//
+// Contact the author at: fernando_cacciola@hotmail.com
+//
+#ifndef BOOST_NUMERIC_CONVERSION_DETAIL_CONVERSION_TRAITS_FLC_12NOV2002_HPP
+#define BOOST_NUMERIC_CONVERSION_DETAIL_CONVERSION_TRAITS_FLC_12NOV2002_HPP
+
+#include "boost/type_traits/is_arithmetic.hpp"
+#include "boost/type_traits/is_same.hpp"
+#include "boost/type_traits/remove_cv.hpp"
+
+#include "boost/numeric/conversion/detail/meta.hpp"
+#include "boost/numeric/conversion/detail/int_float_mixture.hpp"
+#include "boost/numeric/conversion/detail/sign_mixture.hpp"
+#include "boost/numeric/conversion/detail/udt_builtin_mixture.hpp"
+#include "boost/numeric/conversion/detail/is_subranged.hpp"
+
+namespace boost { namespace numeric { namespace convdetail
+{
+ //-------------------------------------------------------------------
+ // Implementation of the Conversion Traits for T != S
+ //
+ // This is a VISIBLE base class of the user-level conversion_traits<> class.
+ //-------------------------------------------------------------------
+ template<class T,class S>
+ struct non_trivial_traits_impl
+ {
+ typedef typename get_int_float_mixture <T,S>::type int_float_mixture ;
+ typedef typename get_sign_mixture <T,S>::type sign_mixture ;
+ typedef typename get_udt_builtin_mixture <T,S>::type udt_builtin_mixture ;
+
+ typedef typename get_is_subranged<T,S>::type subranged ;
+
+ typedef mpl::false_ trivial ;
+
+ typedef T target_type ;
+ typedef S source_type ;
+ typedef T result_type ;
+
+ typedef typename mpl::if_< is_arithmetic<S>, S, S const&>::type argument_type ;
+
+ typedef typename mpl::if_<subranged,S,T>::type supertype ;
+ typedef typename mpl::if_<subranged,T,S>::type subtype ;
+ } ;
+
+ //-------------------------------------------------------------------
+ // Implementation of the Conversion Traits for T == S
+ //
+ // This is a VISIBLE base class of the user-level conversion_traits<> class.
+ //-------------------------------------------------------------------
+ template<class N>
+ struct trivial_traits_impl
+ {
+ typedef typename get_int_float_mixture <N,N>::type int_float_mixture ;
+ typedef typename get_sign_mixture <N,N>::type sign_mixture ;
+ typedef typename get_udt_builtin_mixture<N,N>::type udt_builtin_mixture ;
+
+ typedef mpl::false_ subranged ;
+ typedef mpl::true_ trivial ;
+
+ typedef N target_type ;
+ typedef N source_type ;
+ typedef N const& result_type ;
+ typedef N const& argument_type ;
+
+ typedef N supertype ;
+ typedef N subtype ;
+
+ } ;
+
+ //-------------------------------------------------------------------
+ // Top level implementation selector.
+ //-------------------------------------------------------------------
+ template<class T, class S>
+ struct get_conversion_traits
+ {
+ typedef typename remove_cv<T>::type target_type ;
+ typedef typename remove_cv<S>::type source_type ;
+
+ typedef typename is_same<target_type,source_type>::type is_trivial ;
+
+ typedef trivial_traits_impl <target_type> trivial_imp ;
+ typedef non_trivial_traits_impl<target_type,source_type> non_trivial_imp ;
+
+ typedef typename mpl::if_<is_trivial,trivial_imp,non_trivial_imp>::type type ;
+ } ;
+
+} } } // namespace boost::numeric::convdetail
+
+#endif
+
+