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58 lines
1.6 KiB
58 lines
1.6 KiB
// (C) Copyright John Maddock 2005. |
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// Use, modification and distribution are subject to the |
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// Boost Software License, Version 1.0. (See accompanying file |
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_TR1_MATH_OVERLOADS_HPP_INCLUDED |
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# define BOOST_TR1_MATH_OVERLOADS_HPP_INCLUDED |
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# include <boost/config.hpp> |
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# ifndef BOOST_NO_SFINAE |
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# include <boost/utility/enable_if.hpp> |
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# include <boost/type_traits/is_convertible.hpp> |
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# define BOOST_TR1_MATH_RETURN(RET) typename ::boost::enable_if< ::boost::is_convertible<T,double>, RET >::type |
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# else |
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# define BOOST_TR1_MATH_RETURN(RET) RET |
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# endif |
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# include <boost/type_traits/is_floating_point.hpp> |
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# include <boost/type_traits/is_same.hpp> |
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# include <boost/mpl/if.hpp> |
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namespace boost{ namespace tr1_detail{ |
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template <class T, class U> |
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struct largest_real |
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{ |
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typedef typename boost::mpl::if_< |
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boost::is_same<long double, T>, |
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long double, |
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typename boost::mpl::if_< |
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boost::is_same<long double, U>, |
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long double, |
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typename boost::mpl::if_< |
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boost::is_same<double, T>, |
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double, |
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typename boost::mpl::if_< |
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boost::is_same<double, U>, |
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double, |
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float |
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>::type |
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>::type |
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>::type |
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>::type type; |
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}; |
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template <class T, class U> |
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struct promote_to_real |
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{ |
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typedef typename largest_real< |
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typename boost::mpl::if_< boost::is_floating_point<T>, T, double>::type, |
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typename boost::mpl::if_< boost::is_floating_point<U>, U, double>::type |
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>::type type; |
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}; |
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} } |
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#endif |
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