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// (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
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