xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_upper_bound.h (revision 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583)
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_UPPER_BOUND_H
1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_UPPER_BOUND_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 #include <__ranges/dangling.h>
2381ad6265SDimitry Andric 
2481ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
2581ad6265SDimitry Andric #  pragma GCC system_header
2681ad6265SDimitry Andric #endif
2781ad6265SDimitry Andric 
2806c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
2981ad6265SDimitry Andric 
3081ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
3181ad6265SDimitry Andric 
3281ad6265SDimitry Andric namespace ranges {
3381ad6265SDimitry Andric namespace __upper_bound {
3481ad6265SDimitry Andric struct __fn {
3506c3fb27SDimitry Andric   template <forward_iterator _Iter,
3606c3fb27SDimitry Andric             sentinel_for<_Iter> _Sent,
3706c3fb27SDimitry Andric             class _Type,
3806c3fb27SDimitry Andric             class _Proj                                                             = identity,
3981ad6265SDimitry Andric             indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less>
40*0fca6ea1SDimitry Andric   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Iter
4106c3fb27SDimitry Andric   operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {
425f757f3fSDimitry Andric     auto __comp_lhs_rhs_swapped = [&](const auto& __lhs, const auto& __rhs) -> bool {
4381ad6265SDimitry Andric       return !std::invoke(__comp, __rhs, __lhs);
4481ad6265SDimitry Andric     };
4581ad6265SDimitry Andric 
4606c3fb27SDimitry Andric     return std::__lower_bound<_RangeAlgPolicy>(__first, __last, __value, __comp_lhs_rhs_swapped, __proj);
4781ad6265SDimitry Andric   }
4881ad6265SDimitry Andric 
4906c3fb27SDimitry Andric   template <forward_range _Range,
5006c3fb27SDimitry Andric             class _Type,
5106c3fb27SDimitry Andric             class _Proj                                                                          = identity,
5281ad6265SDimitry Andric             indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
53*0fca6ea1SDimitry Andric   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range>
5406c3fb27SDimitry Andric   operator()(_Range&& __r, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {
555f757f3fSDimitry Andric     auto __comp_lhs_rhs_swapped = [&](const auto& __lhs, const auto& __rhs) -> bool {
5681ad6265SDimitry Andric       return !std::invoke(__comp, __rhs, __lhs);
5781ad6265SDimitry Andric     };
5881ad6265SDimitry Andric 
5906c3fb27SDimitry Andric     return std::__lower_bound<_RangeAlgPolicy>(
6006c3fb27SDimitry Andric         ranges::begin(__r), ranges::end(__r), __value, __comp_lhs_rhs_swapped, __proj);
6181ad6265SDimitry Andric   }
6281ad6265SDimitry Andric };
6381ad6265SDimitry Andric } // namespace __upper_bound
6481ad6265SDimitry Andric 
6581ad6265SDimitry Andric inline namespace __cpo {
6681ad6265SDimitry Andric inline constexpr auto upper_bound = __upper_bound::__fn{};
6781ad6265SDimitry Andric } // namespace __cpo
6881ad6265SDimitry Andric } // namespace ranges
6981ad6265SDimitry Andric 
7081ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD
7181ad6265SDimitry Andric 
7206c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
7381ad6265SDimitry Andric 
7481ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_UPPER_BOUND_H
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