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Diffstat (limited to 'boost/hana/detail/operators/arithmetic.hpp')
-rw-r--r-- | boost/hana/detail/operators/arithmetic.hpp | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/boost/hana/detail/operators/arithmetic.hpp b/boost/hana/detail/operators/arithmetic.hpp new file mode 100644 index 0000000000..d0459115b8 --- /dev/null +++ b/boost/hana/detail/operators/arithmetic.hpp @@ -0,0 +1,78 @@ +/*! +@file +Defines arithmetic operators. + +@copyright Louis Dionne 2013-2016 +Distributed under the Boost Software License, Version 1.0. +(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) + */ + +#ifndef BOOST_HANA_DETAIL_OPERATORS_ARITHMETIC_HPP +#define BOOST_HANA_DETAIL_OPERATORS_ARITHMETIC_HPP + +#include <boost/hana/config.hpp> +#include <boost/hana/core/tag_of.hpp> +#include <boost/hana/fwd/div.hpp> +#include <boost/hana/fwd/minus.hpp> +#include <boost/hana/fwd/mod.hpp> +#include <boost/hana/fwd/mult.hpp> +#include <boost/hana/fwd/negate.hpp> +#include <boost/hana/fwd/plus.hpp> + +#include <type_traits> + + +BOOST_HANA_NAMESPACE_BEGIN namespace detail { + template <typename Tag> + struct arithmetic_operators { + static constexpr bool value = false; + }; + + namespace operators { + template <typename X, typename Y, typename = typename std::enable_if< + detail::arithmetic_operators<typename hana::tag_of<X>::type>::value || + detail::arithmetic_operators<typename hana::tag_of<Y>::type>::value + >::type> + constexpr auto operator+(X&& x, Y&& y) + { return hana::plus(static_cast<X&&>(x), static_cast<Y&&>(y)); } + + + template <typename X, typename Y, typename = typename std::enable_if< + detail::arithmetic_operators<typename hana::tag_of<X>::type>::value || + detail::arithmetic_operators<typename hana::tag_of<Y>::type>::value + >::type> + constexpr auto operator-(X&& x, Y&& y) + { return hana::minus(static_cast<X&&>(x), static_cast<Y&&>(y)); } + + template <typename X, typename = typename std::enable_if< + detail::arithmetic_operators<typename hana::tag_of<X>::type>::value + >::type> + constexpr auto operator-(X&& x) + { return hana::negate(static_cast<X&&>(x)); } + + + template <typename X, typename Y, typename = typename std::enable_if< + detail::arithmetic_operators<typename hana::tag_of<X>::type>::value || + detail::arithmetic_operators<typename hana::tag_of<Y>::type>::value + >::type> + constexpr auto operator*(X&& x, Y&& y) + { return hana::mult(static_cast<X&&>(x), static_cast<Y&&>(y)); } + + + template <typename X, typename Y, typename = typename std::enable_if< + detail::arithmetic_operators<typename hana::tag_of<X>::type>::value || + detail::arithmetic_operators<typename hana::tag_of<Y>::type>::value + >::type> + constexpr auto operator/(X&& x, Y&& y) + { return hana::div(static_cast<X&&>(x), static_cast<Y&&>(y)); } + + template <typename X, typename Y, typename = typename std::enable_if< + detail::arithmetic_operators<typename hana::tag_of<X>::type>::value || + detail::arithmetic_operators<typename hana::tag_of<Y>::type>::value + >::type> + constexpr auto operator%(X&& x, Y&& y) + { return hana::mod(static_cast<X&&>(x), static_cast<Y&&>(y)); } + } // end namespace operators +} BOOST_HANA_NAMESPACE_END + +#endif // !BOOST_HANA_DETAIL_OPERATORS_ARITHMETIC_HPP |