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// Copyright 2005 Alexander Nasonov.
// Distributed under 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)
#ifndef FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
#define FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
#include <boost/config.hpp>
#ifdef BOOST_NO_CV_SPECIALIZATIONS
#include <boost/mpl/at.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/multiplies.hpp>
#include <boost/mpl/plus.hpp>
#include <boost/mpl/vector.hpp>
#include <boost/type_traits/is_same.hpp>
#endif
// Should be the last #include
#include <boost/type_traits/detail/type_trait_def.hpp>
namespace boost {
namespace type_traits { namespace detail {
#ifndef BOOST_NO_CV_SPECIALIZATIONS
template<class T>
struct floating_point_promotion
{
typedef T type;
};
template<>
struct floating_point_promotion<float>
{
typedef double type;
};
template<>
struct floating_point_promotion<float const>
{
typedef double const type;
};
template<>
struct floating_point_promotion<float volatile>
{
typedef double volatile type;
};
template<>
struct floating_point_promotion<float const volatile>
{
typedef double const volatile type;
};
#else
template<class T>
struct floating_point_promotion
: mpl::at<
mpl::vector< T, double, double const, double volatile,
double const volatile >
, mpl::plus<
is_same<T, float>
, mpl::multiplies< is_same<T, float const> , mpl::int_<2> >
, mpl::multiplies< is_same<T, float volatile> , mpl::int_<3> >
, mpl::multiplies< is_same<T, float const volatile>, mpl::int_<4> >
>
>
{
};
#endif
} }
BOOST_TT_AUX_TYPE_TRAIT_DEF1(
floating_point_promotion
, T
, BOOST_DEDUCED_TYPENAME
boost::type_traits::detail::floating_point_promotion<T>::type
)
}
#include <boost/type_traits/detail/type_trait_undef.hpp>
#endif // #ifndef FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
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