181ad6265SDimitry Andric //===----------------------------------------------------------------------===// 281ad6265SDimitry Andric // 381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 681ad6265SDimitry Andric // 781ad6265SDimitry Andric //===----------------------------------------------------------------------===// 881ad6265SDimitry Andric 981ad6265SDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H 1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H 1181ad6265SDimitry Andric 1281ad6265SDimitry Andric #include <__algorithm/iterator_operations.h> 1381ad6265SDimitry Andric #include <__algorithm/lower_bound.h> 1481ad6265SDimitry Andric #include <__config> 1581ad6265SDimitry Andric #include <__functional/identity.h> 1681ad6265SDimitry Andric #include <__functional/invoke.h> 1781ad6265SDimitry Andric #include <__functional/ranges_operations.h> 1881ad6265SDimitry Andric #include <__iterator/concepts.h> 1981ad6265SDimitry Andric #include <__iterator/projected.h> 2081ad6265SDimitry Andric #include <__ranges/access.h> 2181ad6265SDimitry Andric #include <__ranges/concepts.h> 2281ad6265SDimitry Andric 2381ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2481ad6265SDimitry Andric # pragma GCC system_header 2581ad6265SDimitry Andric #endif 2681ad6265SDimitry Andric 27b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 28b3edf446SDimitry Andric #include <__undef_macros> 29b3edf446SDimitry Andric 3006c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 3181ad6265SDimitry Andric 3281ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 3381ad6265SDimitry Andric 3481ad6265SDimitry Andric namespace ranges { 3581ad6265SDimitry Andric namespace __binary_search { 3681ad6265SDimitry Andric struct __fn { 3706c3fb27SDimitry Andric template <forward_iterator _Iter, 3806c3fb27SDimitry Andric sentinel_for<_Iter> _Sent, 3906c3fb27SDimitry Andric class _Type, 4006c3fb27SDimitry Andric class _Proj = identity, 4181ad6265SDimitry Andric indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less> 42*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool 4306c3fb27SDimitry Andric operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const { 4406c3fb27SDimitry Andric auto __ret = std::__lower_bound<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj); 451ac55f4cSDimitry Andric return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__ret)); 4681ad6265SDimitry Andric } 4781ad6265SDimitry Andric 4806c3fb27SDimitry Andric template <forward_range _Range, 4906c3fb27SDimitry Andric class _Type, 5006c3fb27SDimitry Andric class _Proj = identity, 5181ad6265SDimitry Andric indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> 52*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool 5306c3fb27SDimitry Andric operator()(_Range&& __r, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const { 5481ad6265SDimitry Andric auto __first = ranges::begin(__r); 5581ad6265SDimitry Andric auto __last = ranges::end(__r); 5606c3fb27SDimitry Andric auto __ret = std::__lower_bound<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj); 571ac55f4cSDimitry Andric return __ret != __last && !std::invoke(__comp, __value, std::invoke(__proj, *__ret)); 5881ad6265SDimitry Andric } 5981ad6265SDimitry Andric }; 6081ad6265SDimitry Andric } // namespace __binary_search 6181ad6265SDimitry Andric 6281ad6265SDimitry Andric inline namespace __cpo { 6381ad6265SDimitry Andric inline constexpr auto binary_search = __binary_search::__fn{}; 6481ad6265SDimitry Andric } // namespace __cpo 6581ad6265SDimitry Andric } // namespace ranges 6681ad6265SDimitry Andric 6781ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD 6881ad6265SDimitry Andric 6906c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 7081ad6265SDimitry Andric 71b3edf446SDimitry Andric _LIBCPP_POP_MACROS 72b3edf446SDimitry Andric 7381ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H 74