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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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H |
| 10 | #define _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H |
| 11 | |
| 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_header |
| 25 | #endif |
| 26 | |
| 27 | _LIBCPP_PUSH_MACROS |
| 28 | #include <__undef_macros> |
| 29 | |
| 30 | #if _LIBCPP_STD_VER >= 20 |
| 31 | |
| 32 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 33 | |
| 34 | namespace ranges { |
| 35 | struct __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 bool |
| 42 | 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 bool |
| 52 | 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 | |
| 60 | inline namespace __cpo { |
| 61 | inline constexpr auto binary_search = __binary_search{}; |
| 62 | } // namespace __cpo |
| 63 | } // namespace ranges |
| 64 | |
| 65 | _LIBCPP_END_NAMESPACE_STD |
| 66 | |
| 67 | #endif // _LIBCPP_STD_VER >= 20 |
| 68 | |
| 69 | _LIBCPP_POP_MACROS |
| 70 | |
| 71 | #endif // _LIBCPP___ALGORITHM_RANGES_BINARY_SEARCH_H |
| 72 |
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