projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*! |
| 2 | @file | |
| 3 | Defines operators for Comparables. | |
| 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_COMPARABLE_HPP | |
| 11 | #define BOOST_HANA_DETAIL_OPERATORS_COMPARABLE_HPP | |
| 12 | ||
| 13 | #include <boost/hana/config.hpp> | |
| 14 | #include <boost/hana/core/tag_of.hpp> | |
| 15 | #include <boost/hana/fwd/equal.hpp> | |
| 16 | #include <boost/hana/fwd/not_equal.hpp> | |
| 17 | ||
| 18 | #include <type_traits> | |
| 19 | ||
| 20 | ||
| 21 | BOOST_HANA_NAMESPACE_BEGIN namespace detail { | |
| 22 | template <typename Tag> | |
| 23 | struct comparable_operators { | |
| 24 | static constexpr bool value = false; | |
| 25 | }; | |
| 26 | ||
| 27 | namespace operators { | |
| 28 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 29 | detail::comparable_operators<typename hana::tag_of<X>::type>::value || | |
| 30 | detail::comparable_operators<typename hana::tag_of<Y>::type>::value | |
| 31 | >::type> | |
| 32 | constexpr auto operator==(X&& x, Y&& y) | |
| 33 | { return hana::equal(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 34 | ||
| 35 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 36 | detail::comparable_operators<typename hana::tag_of<X>::type>::value || | |
| 37 | detail::comparable_operators<typename hana::tag_of<Y>::type>::value | |
| 38 | >::type> | |
| 39 | constexpr auto operator!=(X&& x, Y&& y) | |
| 40 | { return hana::not_equal(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 41 | } // end namespace operators | |
| 42 | } BOOST_HANA_NAMESPACE_END | |
| 43 | ||
| 44 | #endif // !BOOST_HANA_DETAIL_OPERATORS_COMPARABLE_HPP |