projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*! |
| 2 | @file | |
| 3 | Defines logical operators. | |
| 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_LOGICAL_HPP | |
| 11 | #define BOOST_HANA_DETAIL_OPERATORS_LOGICAL_HPP | |
| 12 | ||
| 13 | #include <boost/hana/config.hpp> | |
| 14 | #include <boost/hana/core/tag_of.hpp> | |
| 15 | #include <boost/hana/fwd/and.hpp> | |
| 16 | #include <boost/hana/fwd/not.hpp> | |
| 17 | #include <boost/hana/fwd/or.hpp> | |
| 18 | ||
| 19 | #include <type_traits> | |
| 20 | ||
| 21 | ||
| 22 | BOOST_HANA_NAMESPACE_BEGIN namespace detail { | |
| 23 | template <typename Tag> | |
| 24 | struct logical_operators { | |
| 25 | static constexpr bool value = false; | |
| 26 | }; | |
| 27 | ||
| 28 | namespace operators { | |
| 29 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 30 | detail::logical_operators<typename hana::tag_of<X>::type>::value || | |
| 31 | detail::logical_operators<typename hana::tag_of<Y>::type>::value | |
| 32 | >::type> | |
| 33 | constexpr auto operator||(X&& x, Y&& y) | |
| 34 | { return hana::or_(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 35 | ||
| 36 | template <typename X, typename Y, typename = typename std::enable_if< | |
| 37 | detail::logical_operators<typename hana::tag_of<X>::type>::value || | |
| 38 | detail::logical_operators<typename hana::tag_of<Y>::type>::value | |
| 39 | >::type> | |
| 40 | constexpr auto operator&&(X&& x, Y&& y) | |
| 41 | { return hana::and_(static_cast<X&&>(x), static_cast<Y&&>(y)); } | |
| 42 | ||
| 43 | template <typename X, typename = typename std::enable_if< | |
| 44 | detail::logical_operators<typename hana::tag_of<X>::type>::value | |
| 45 | >::type> | |
| 46 | constexpr auto operator!(X&& x) | |
| 47 | { return hana::not_(static_cast<X&&>(x)); } | |
| 48 | } // end namespace operators | |
| 49 | } BOOST_HANA_NAMESPACE_END | |
| 50 | ||
| 51 | #endif // !BOOST_HANA_DETAIL_OPERATORS_LOGICAL_HPP |