williamr@2: //  © Copyright Fernando Luis Cacciola Carballal 2000-2004
williamr@2: //  Use, modification, and distribution is subject to the Boost Software
williamr@2: //  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
williamr@2: //  http://www.boost.org/LICENSE_1_0.txt)
williamr@2: 
williamr@2: //  See library home page at http://www.boost.org/libs/numeric/conversion
williamr@2: //
williamr@2: // Contact the author at: fernando_cacciola@hotmail.com
williamr@2: // 
williamr@2: #ifndef BOOST_NUMERIC_CONVERSION_DETAIL_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
williamr@2: #define BOOST_NUMERIC_CONVERSION_DETAIL_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
williamr@2: 
williamr@2: #include "boost/config.hpp"
williamr@2: #include "boost/limits.hpp"
williamr@2: 
williamr@2: #include "boost/numeric/conversion/int_float_mixture_enum.hpp"
williamr@2: #include "boost/numeric/conversion/detail/meta.hpp"
williamr@2: 
williamr@2: #include "boost/mpl/integral_c.hpp"
williamr@2: 
williamr@2: namespace boost { namespace numeric { namespace convdetail
williamr@2: {
williamr@2:   // Integral Constants for 'IntFloatMixture'
williamr@2:   typedef mpl::integral_c<int_float_mixture_enum, integral_to_integral> int2int_c ;
williamr@2:   typedef mpl::integral_c<int_float_mixture_enum, integral_to_float>    int2float_c ;
williamr@2:   typedef mpl::integral_c<int_float_mixture_enum, float_to_integral>    float2int_c ;
williamr@2:   typedef mpl::integral_c<int_float_mixture_enum, float_to_float>       float2float_c ;
williamr@2: 
williamr@2:   // Metafunction:
williamr@2:   //
williamr@2:   //   get_int_float_mixture<T,S>::type
williamr@2:   //
williamr@2:   // Selects the appropriate Int-Float Mixture Integral Constant for the combination T,S.
williamr@2:   //
williamr@2:   template<class T,class S>
williamr@2:   struct get_int_float_mixture
williamr@2:   {
williamr@2:     typedef mpl::bool_< ::std::numeric_limits<S>::is_integer > S_int ;
williamr@2:     typedef mpl::bool_< ::std::numeric_limits<T>::is_integer > T_int ;
williamr@2: 
williamr@2:     typedef typename
williamr@2:       for_both<S_int, T_int, int2int_c, int2float_c, float2int_c, float2float_c>::type
williamr@2:         type ;
williamr@2:   } ;
williamr@2: 
williamr@2:   // Metafunction:
williamr@2:   //
williamr@2:   //   for_int_float_mixture<Mixture,int_int,int_float,float_int,float_float>::type
williamr@2:   //
williamr@2:   // {Mixture} is one of the Integral Constants for Mixture, declared above.
williamr@2:   // {int_int,int_float,float_int,float_float} are aribtrary types. (not metafunctions)
williamr@2:   //
williamr@2:   // According to the value of 'IntFloatMixture', selects the corresponding type.
williamr@2:   //
williamr@2:   template<class IntFloatMixture, class Int2Int, class Int2Float, class Float2Int, class Float2Float>
williamr@2:   struct for_int_float_mixture
williamr@2:   {
williamr@2:     typedef typename
williamr@2:       ct_switch4<IntFloatMixture
williamr@2:                  ,int2int_c, int2float_c, float2int_c  // default
williamr@2:                  ,Int2Int  , Int2Float  , Float2Int  , Float2Float
williamr@2:                 >::type
williamr@2:         type ;
williamr@2:   } ;
williamr@2: 
williamr@2: } } } // namespace boost::numeric::convdetail
williamr@2: 
williamr@2: #endif
williamr@2: //
williamr@2: ///////////////////////////////////////////////////////////////////////////////////////////////
williamr@2: 
williamr@2: