// (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 | |
// | |
/////////////////////////////////////////////////////////////////////////////////////////////// | |