You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
69 lines
2.4 KiB
69 lines
2.4 KiB
// (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_UDT_BUILTIN_MIXTURE_FLC_12NOV2002_HPP |
|
#define BOOST_NUMERIC_CONVERSION_DETAIL_UDT_BUILTIN_MIXTURE_FLC_12NOV2002_HPP |
|
|
|
#include "boost/type_traits/is_arithmetic.hpp" |
|
|
|
#include "boost/numeric/conversion/udt_builtin_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 'UdtMixture' |
|
typedef mpl::integral_c<udt_builtin_mixture_enum, builtin_to_builtin> builtin2builtin_c ; |
|
typedef mpl::integral_c<udt_builtin_mixture_enum, builtin_to_udt> builtin2udt_c ; |
|
typedef mpl::integral_c<udt_builtin_mixture_enum, udt_to_builtin> udt2builtin_c ; |
|
typedef mpl::integral_c<udt_builtin_mixture_enum, udt_to_udt> udt2udt_c ; |
|
|
|
// Metafunction: |
|
// |
|
// for_udt_mixture<UdtMixture,BuiltIn2BuiltIn,BuiltIn2Udt,Udt2BuiltIn,Udt2Udt>::type |
|
// |
|
// {UdtMixture} is one of the Integral Constants for UdMixture, declared above. |
|
// {BuiltIn2BuiltIn,BuiltIn2Udt,Udt2BuiltIn,Udt2Udt} are aribtrary types. (not metafunctions) |
|
// |
|
// According to the value of 'UdtMixture', selects the corresponding type. |
|
// |
|
template<class UdtMixture, class BuiltIn2BuiltIn, class BuiltIn2Udt, class Udt2BuiltIn, class Udt2Udt> |
|
struct for_udt_builtin_mixture |
|
{ |
|
typedef typename |
|
ct_switch4<UdtMixture |
|
, builtin2builtin_c, builtin2udt_c, udt2builtin_c // default |
|
, BuiltIn2BuiltIn , BuiltIn2Udt , Udt2BuiltIn , Udt2Udt |
|
>::type |
|
type ; |
|
} ; |
|
|
|
// Metafunction: |
|
// |
|
// get_udt_mixture<T,S>::type |
|
// |
|
// Selects the appropriate UdtMixture Integral Constant for the combination T,S. |
|
// |
|
template<class T,class S> |
|
struct get_udt_builtin_mixture |
|
{ |
|
typedef is_arithmetic<S> S_builtin ; |
|
typedef is_arithmetic<T> T_builtin ; |
|
|
|
typedef typename |
|
for_both<S_builtin, T_builtin, builtin2builtin_c, builtin2udt_c, udt2builtin_c, udt2udt_c>::type |
|
type ; |
|
} ; |
|
|
|
} } } // namespace boost::numeric::convdetail |
|
|
|
#endif |
|
|
|
|
|
|