| //===----------------------------------------------------------------------===// |
| // |
| // 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___ALGORITHM_RANGES_BINARY_SEARCH_H |
| #define _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H |
| |
| #include <__algorithm/iterator_operations.h> |
| #include <__algorithm/lower_bound.h> |
| #include <__config> |
| #include <__functional/identity.h> |
| #include <__functional/invoke.h> |
| #include <__functional/ranges_operations.h> |
| #include <__iterator/concepts.h> |
| #include <__iterator/projected.h> |
| #include <__ranges/access.h> |
| #include <__ranges/concepts.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER > 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace ranges { |
| namespace __binary_search { |
| struct __fn { |
| template <forward_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity, |
| indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less> |
| _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr |
| bool operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const { |
| auto __ret = std::__lower_bound_impl<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj); |
| return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__first)); |
| } |
| |
| template <forward_range _Range, class _Type, class _Proj = identity, |
| indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> |
| _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr |
| bool operator()(_Range&& __r, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const { |
| auto __first = ranges::begin(__r); |
| auto __last = ranges::end(__r); |
| auto __ret = std::__lower_bound_impl<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj); |
| return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__first)); |
| } |
| }; |
| } // namespace __binary_search |
| |
| inline namespace __cpo { |
| inline constexpr auto binary_search = __binary_search::__fn{}; |
| } // namespace __cpo |
| } // namespace ranges |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER > 17 |
| |
| #endif // _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H |