59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
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// (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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