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_UPPER_BOUND_H
10 #define _LIBCPP___ALGORITHM_RANGES_UPPER_BOUND_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 #include <__ranges/dangling.h>
23 
24 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
25 #  pragma GCC system_header
26 #endif
27 
28 #if _LIBCPP_STD_VER > 17
29 
30 _LIBCPP_BEGIN_NAMESPACE_STD
31 
32 namespace ranges {
33 namespace __upper_bound {
34 struct __fn {
35   template <forward_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity,
36             indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less>
37   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
operator__fn38   _Iter operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {
39     auto __comp_lhs_rhs_swapped = [&](const auto& __lhs, const auto& __rhs) {
40       return !std::invoke(__comp, __rhs, __lhs);
41     };
42 
43     return std::__lower_bound_impl<_RangeAlgPolicy>(__first, __last, __value, __comp_lhs_rhs_swapped, __proj);
44   }
45 
46   template <forward_range _Range, class _Type, class _Proj = identity,
47             indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
48   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
operator__fn49   borrowed_iterator_t<_Range> operator()(_Range&& __r,
50                                          const _Type& __value,
51                                          _Comp __comp = {},
52                                          _Proj __proj = {}) const {
53     auto __comp_lhs_rhs_swapped = [&](const auto& __lhs, const auto& __rhs) {
54       return !std::invoke(__comp, __rhs, __lhs);
55     };
56 
57     return std::__lower_bound_impl<_RangeAlgPolicy>(ranges::begin(__r),
58                                                    ranges::end(__r),
59                                                    __value,
60                                                    __comp_lhs_rhs_swapped,
61                                                    __proj);
62   }
63 };
64 } // namespace __upper_bound
65 
66 inline namespace __cpo {
67   inline constexpr auto upper_bound = __upper_bound::__fn{};
68 } // namespace __cpo
69 } // namespace ranges
70 
71 _LIBCPP_END_NAMESPACE_STD
72 
73 #endif // _LIBCPP_STD_VER > 17
74 
75 #endif // _LIBCPP___ALGORITHM_RANGES_UPPER_BOUND_H
76