1 // © Copyright Fernando Luis Cacciola Carballal 2000-2004
2 // Use, modification, and distribution is subject to the Boost Software
3 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
6 // See library home page at http://www.boost.org/libs/numeric/conversion
8 // Contact the author at: fernando_cacciola@hotmail.com
10 #ifndef BOOST_NUMERIC_CONVERSION_DETAIL_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
11 #define BOOST_NUMERIC_CONVERSION_DETAIL_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
13 #include "boost/config.hpp"
14 #include "boost/limits.hpp"
16 #include "boost/numeric/conversion/int_float_mixture_enum.hpp"
17 #include "boost/numeric/conversion/detail/meta.hpp"
19 #include "boost/mpl/integral_c.hpp"
21 namespace boost { namespace numeric { namespace convdetail
23 // Integral Constants for 'IntFloatMixture'
24 typedef mpl::integral_c<int_float_mixture_enum, integral_to_integral> int2int_c ;
25 typedef mpl::integral_c<int_float_mixture_enum, integral_to_float> int2float_c ;
26 typedef mpl::integral_c<int_float_mixture_enum, float_to_integral> float2int_c ;
27 typedef mpl::integral_c<int_float_mixture_enum, float_to_float> float2float_c ;
31 // get_int_float_mixture<T,S>::type
33 // Selects the appropriate Int-Float Mixture Integral Constant for the combination T,S.
35 template<class T,class S>
36 struct get_int_float_mixture
38 typedef mpl::bool_< ::std::numeric_limits<S>::is_integer > S_int ;
39 typedef mpl::bool_< ::std::numeric_limits<T>::is_integer > T_int ;
42 for_both<S_int, T_int, int2int_c, int2float_c, float2int_c, float2float_c>::type
48 // for_int_float_mixture<Mixture,int_int,int_float,float_int,float_float>::type
50 // {Mixture} is one of the Integral Constants for Mixture, declared above.
51 // {int_int,int_float,float_int,float_float} are aribtrary types. (not metafunctions)
53 // According to the value of 'IntFloatMixture', selects the corresponding type.
55 template<class IntFloatMixture, class Int2Int, class Int2Float, class Float2Int, class Float2Float>
56 struct for_int_float_mixture
59 ct_switch4<IntFloatMixture
60 ,int2int_c, int2float_c, float2int_c // default
61 ,Int2Int , Int2Float , Float2Int , Float2Float
66 } } } // namespace boost::numeric::convdetail
70 ///////////////////////////////////////////////////////////////////////////////////////////////