projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*! |
| 2 | @file | |
| 3 | Defines operators for Orderables. | |
| 4 | ||
| 5 | @copyright Louis Dionne 2013-2016 | |
| 6 | Distributed under the Boost Software License, Version 1.0. | |
| 7 | (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef BOOST_HANA_DETAIL_OPERATORS_ORDERABLE_HPP | |
| 11 | #define BOOST_HANA_DETAIL_OPERATORS_ORDERABLE_HPP | |
| 12 | ||
| 13 | #include <boost/hana/config.hpp> | |
| 14 | #include <boost/hana/core/tag_of.hpp> | |
| 15 | #include <boost/hana/fwd/greater.hpp> | |
| 16 | #include <boost/hana/fwd/greater_equal.hpp> | |
| 17 | #include <boost/hana/fwd/less.hpp> | |
| 18 | #include <boost/hana/fwd/less_equal.hpp> | |
| 19 | ||
| 20 | #include <type_traits> | |
| 21 | ||
| 22 | ||
| 23 | BOOST_HANA_NAMESPACE_BEGIN namespace detail { | |
| 24 | template <typename Tag> | |
| 25 | struct orderable_operators { | |
| 26 | static constexpr bool value = false; | |
| 27 | }; | |
| 28 | ||
| 29 | namespace operators { | |
| 30 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 31 | detail::orderable_operators<typename hana::tag_of<X>::type>::value || | |
| 32 | detail::orderable_operators<typename hana::tag_of<Y>::type>::value | |
| 33 | >::type> | |
| 34 | constexpr auto operator<(X&& x, Y&& y) | |
| 35 | { return hana::less(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 36 | ||
| 37 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 38 | detail::orderable_operators<typename hana::tag_of<X>::type>::value || | |
| 39 | detail::orderable_operators<typename hana::tag_of<Y>::type>::value | |
| 40 | >::type> | |
| 41 | constexpr auto operator>(X&& x, Y&& y) | |
| 42 | { return hana::greater(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 43 | ||
| 44 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 45 | detail::orderable_operators<typename hana::tag_of<X>::type>::value || | |
| 46 | detail::orderable_operators<typename hana::tag_of<Y>::type>::value | |
| 47 | >::type> | |
| 48 | constexpr auto operator<=(X&& x, Y&& y) | |
| 49 | { return hana::less_equal(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 50 | ||
| 51 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 52 | detail::orderable_operators<typename hana::tag_of<X>::type>::value || | |
| 53 | detail::orderable_operators<typename hana::tag_of<Y>::type>::value | |
| 54 | >::type> | |
| 55 | constexpr auto operator>=(X&& x, Y&& y) | |
| 56 | { return hana::greater_equal(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 57 | } // end namespace operators | |
| 58 | } BOOST_HANA_NAMESPACE_END | |
| 59 | ||
| 60 | #endif // !BOOST_HANA_DETAIL_OPERATORS_ORDERABLE_HPP |