| // (C) Copyright John Maddock 2005. |
| // Use, modification and distribution are 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) |
| |
| #ifndef BOOST_TR1_MATH_OVERLOADS_HPP_INCLUDED |
| # define BOOST_TR1_MATH_OVERLOADS_HPP_INCLUDED |
| # include <boost/config.hpp> |
| |
| # ifndef BOOST_NO_SFINAE |
| # include <boost/utility/enable_if.hpp> |
| # include <boost/type_traits/is_convertible.hpp> |
| # define BOOST_TR1_MATH_RETURN(RET) typename ::boost::enable_if< ::boost::is_convertible<T,double>, RET >::type |
| # else |
| # define BOOST_TR1_MATH_RETURN(RET) RET |
| # endif |
| |
| # include <boost/type_traits/is_floating_point.hpp> |
| # include <boost/type_traits/is_same.hpp> |
| # include <boost/mpl/if.hpp> |
| |
| namespace boost{ namespace tr1_detail{ |
| |
| template <class T, class U> |
| struct largest_real |
| { |
| typedef typename boost::mpl::if_< |
| boost::is_same<long double, T>, |
| long double, |
| typename boost::mpl::if_< |
| boost::is_same<long double, U>, |
| long double, |
| typename boost::mpl::if_< |
| boost::is_same<double, T>, |
| double, |
| typename boost::mpl::if_< |
| boost::is_same<double, U>, |
| double, |
| float |
| >::type |
| >::type |
| >::type |
| >::type type; |
| }; |
| |
| template <class T, class U> |
| struct promote_to_real |
| { |
| typedef typename largest_real< |
| typename boost::mpl::if_< boost::is_floating_point<T>, T, double>::type, |
| typename boost::mpl::if_< boost::is_floating_point<U>, U, double>::type |
| >::type type; |
| }; |
| |
| } } |
| |
| #endif |
| |