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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H10#define _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H11 12#include <__algorithm/iterator_operations.h>13#include <__algorithm/lower_bound.h>14#include <__config>15#include <__functional/identity.h>16#include <__functional/invoke.h>17#include <__functional/ranges_operations.h>18#include <__iterator/concepts.h>19#include <__iterator/projected.h>20#include <__ranges/access.h>21#include <__ranges/concepts.h>22 23#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)24# pragma GCC system_header25#endif26 27_LIBCPP_PUSH_MACROS28#include <__undef_macros>29 30#if _LIBCPP_STD_VER >= 2031 32_LIBCPP_BEGIN_NAMESPACE_STD33 34namespace ranges {35struct __binary_search {36 template <forward_iterator _Iter,37 sentinel_for<_Iter> _Sent,38 class _Type,39 class _Proj = identity,40 indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less>41 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool42 operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {43 auto __ret = std::__lower_bound<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj);44 return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__ret));45 }46 47 template <forward_range _Range,48 class _Type,49 class _Proj = identity,50 indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>51 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool52 operator()(_Range&& __r, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {53 auto __first = ranges::begin(__r);54 auto __last = ranges::end(__r);55 auto __ret = std::__lower_bound<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj);56 return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__ret));57 }58};59 60inline namespace __cpo {61inline constexpr auto binary_search = __binary_search{};62} // namespace __cpo63} // namespace ranges64 65_LIBCPP_END_NAMESPACE_STD66 67#endif // _LIBCPP_STD_VER >= 2068 69_LIBCPP_POP_MACROS70 71#endif // _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H72