| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___FUNCTIONAL_RANGES_OPERATIONS_H |
| #define _LIBCPP___FUNCTIONAL_RANGES_OPERATIONS_H |
| |
| #include <__concepts/equality_comparable.h> |
| #include <__concepts/totally_ordered.h> |
| #include <__config> |
| #include <__type_traits/desugars_to.h> |
| #include <__utility/forward.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER >= 20 |
| |
| namespace ranges { |
| |
| struct equal_to { |
| template <class _Tp, class _Up> |
| requires equality_comparable_with<_Tp, _Up> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t, _Up&& __u) const |
| noexcept(noexcept(bool(std::forward<_Tp>(__t) == std::forward<_Up>(__u)))) { |
| return std::forward<_Tp>(__t) == std::forward<_Up>(__u); |
| } |
| |
| using is_transparent = void; |
| }; |
| |
| struct not_equal_to { |
| template <class _Tp, class _Up> |
| requires equality_comparable_with<_Tp, _Up> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t, _Up&& __u) const |
| noexcept(noexcept(bool(!(std::forward<_Tp>(__t) == std::forward<_Up>(__u))))) { |
| return !(std::forward<_Tp>(__t) == std::forward<_Up>(__u)); |
| } |
| |
| using is_transparent = void; |
| }; |
| |
| struct less { |
| template <class _Tp, class _Up> |
| requires totally_ordered_with<_Tp, _Up> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t, _Up&& __u) const |
| noexcept(noexcept(bool(std::forward<_Tp>(__t) < std::forward<_Up>(__u)))) { |
| return std::forward<_Tp>(__t) < std::forward<_Up>(__u); |
| } |
| |
| using is_transparent = void; |
| }; |
| |
| struct less_equal { |
| template <class _Tp, class _Up> |
| requires totally_ordered_with<_Tp, _Up> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t, _Up&& __u) const |
| noexcept(noexcept(bool(!(std::forward<_Up>(__u) < std::forward<_Tp>(__t))))) { |
| return !(std::forward<_Up>(__u) < std::forward<_Tp>(__t)); |
| } |
| |
| using is_transparent = void; |
| }; |
| |
| struct greater { |
| template <class _Tp, class _Up> |
| requires totally_ordered_with<_Tp, _Up> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t, _Up&& __u) const |
| noexcept(noexcept(bool(std::forward<_Up>(__u) < std::forward<_Tp>(__t)))) { |
| return std::forward<_Up>(__u) < std::forward<_Tp>(__t); |
| } |
| |
| using is_transparent = void; |
| }; |
| |
| struct greater_equal { |
| template <class _Tp, class _Up> |
| requires totally_ordered_with<_Tp, _Up> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t, _Up&& __u) const |
| noexcept(noexcept(bool(!(std::forward<_Tp>(__t) < std::forward<_Up>(__u))))) { |
| return !(std::forward<_Tp>(__t) < std::forward<_Up>(__u)); |
| } |
| |
| using is_transparent = void; |
| }; |
| |
| } // namespace ranges |
| |
| // For ranges we do not require that the types on each side of the equality |
| // operator are of the same type |
| template <class _Tp, class _Up> |
| inline const bool __desugars_to_v<__equal_tag, ranges::equal_to, _Tp, _Up> = true; |
| |
| template <class _Tp, class _Up> |
| inline const bool __desugars_to_v<__less_tag, ranges::less, _Tp, _Up> = true; |
| |
| #endif // _LIBCPP_STD_VER >= 20 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___FUNCTIONAL_RANGES_OPERATIONS_H |