73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
// (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_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
|
|
#define BOOST_NUMERIC_CONVERSION_DETAIL_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
|
|
|
|
#include "boost/config.hpp"
|
|
#include "boost/limits.hpp"
|
|
|
|
#include "boost/numeric/conversion/int_float_mixture_enum.hpp"
|
|
#include "boost/numeric/conversion/detail/meta.hpp"
|
|
|
|
#include "boost/mpl/integral_c.hpp"
|
|
|
|
namespace boost { namespace numeric { namespace convdetail
|
|
{
|
|
// Integral Constants for 'IntFloatMixture'
|
|
typedef mpl::integral_c<int_float_mixture_enum, integral_to_integral> int2int_c ;
|
|
typedef mpl::integral_c<int_float_mixture_enum, integral_to_float> int2float_c ;
|
|
typedef mpl::integral_c<int_float_mixture_enum, float_to_integral> float2int_c ;
|
|
typedef mpl::integral_c<int_float_mixture_enum, float_to_float> float2float_c ;
|
|
|
|
// Metafunction:
|
|
//
|
|
// get_int_float_mixture<T,S>::type
|
|
//
|
|
// Selects the appropriate Int-Float Mixture Integral Constant for the combination T,S.
|
|
//
|
|
template<class T,class S>
|
|
struct get_int_float_mixture
|
|
{
|
|
typedef mpl::bool_< ::std::numeric_limits<S>::is_integer > S_int ;
|
|
typedef mpl::bool_< ::std::numeric_limits<T>::is_integer > T_int ;
|
|
|
|
typedef typename
|
|
for_both<S_int, T_int, int2int_c, int2float_c, float2int_c, float2float_c>::type
|
|
type ;
|
|
} ;
|
|
|
|
// Metafunction:
|
|
//
|
|
// for_int_float_mixture<Mixture,int_int,int_float,float_int,float_float>::type
|
|
//
|
|
// {Mixture} is one of the Integral Constants for Mixture, declared above.
|
|
// {int_int,int_float,float_int,float_float} are aribtrary types. (not metafunctions)
|
|
//
|
|
// According to the value of 'IntFloatMixture', selects the corresponding type.
|
|
//
|
|
template<class IntFloatMixture, class Int2Int, class Int2Float, class Float2Int, class Float2Float>
|
|
struct for_int_float_mixture
|
|
{
|
|
typedef typename
|
|
ct_switch4<IntFloatMixture
|
|
,int2int_c, int2float_c, float2int_c // default
|
|
,Int2Int , Int2Float , Float2Int , Float2Float
|
|
>::type
|
|
type ;
|
|
} ;
|
|
|
|
} } } // namespace boost::numeric::convdetail
|
|
|
|
#endif
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|