1// Copyright 2005 Alexander Nasonov.
2// Distributed under the Boost Software License, Version 1.0. (See
3// accompanying file LICENSE_1_0.txt or copy at
4// http://www.boost.org/LICENSE_1_0.txt)
5
6#ifndef FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
7#define FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
8
9#include <boost/config.hpp>
10
11namespace boost {
12
13 template<class T> struct floating_point_promotion { typedef T type; };
14 template<> struct floating_point_promotion<float> { typedef double type; };
15 template<> struct floating_point_promotion<float const> { typedef double const type; };
16 template<> struct floating_point_promotion<float volatile>{ typedef double volatile type; };
17 template<> struct floating_point_promotion<float const volatile> { typedef double const volatile type; };
18
19#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
20
21 template <class T> using floating_point_promotion_t = typename floating_point_promotion<T>::type;
22
23#endif
24
25}
26
27#endif // #ifndef FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
28
29

source code of include/boost/type_traits/floating_point_promotion.hpp