// 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 | |