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/lower_bound.h>
13 #include <__config>
14 #include <__functional/identity.h>
15 #include <__functional/invoke.h>
16 #include <__functional/ranges_operations.h>
17 #include <__iterator/concepts.h>
18 #include <__iterator/projected.h>
19 #include <__ranges/access.h>
20 #include <__ranges/concepts.h>
21 #include <__ranges/dangling.h>
22 
23 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
24 #  pragma GCC system_header
25 #endif
26 
27 #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
28 
29 _LIBCPP_BEGIN_NAMESPACE_STD
30 
31 namespace ranges {
32 namespace __upper_bound {
33 struct __fn {
34   template <forward_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity,
35             indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less>
36   _LIBCPP_HIDE_FROM_ABI constexpr
37   _Iter operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {
38     auto __comp_lhs_rhs_swapped = [&](const auto& __lhs, const auto& __rhs) {
39       return !std::invoke(__comp, __rhs, __lhs);
40     };
41 
42     return std::__lower_bound_impl(__first, __last, __value, __comp_lhs_rhs_swapped, __proj);
43   }
44 
45   template <forward_range _Range, class _Type, class _Proj = identity,
46             indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
47   _LIBCPP_HIDE_FROM_ABI constexpr
48   borrowed_iterator_t<_Range> operator()(_Range&& __r,
49                                          const _Type& __value,
50                                          _Comp __comp = {},
51                                          _Proj __proj = {}) const {
52     auto __comp_lhs_rhs_swapped = [&](const auto& __lhs, const auto& __rhs) {
53       return !std::invoke(__comp, __rhs, __lhs);
54     };
55 
56     return std::__lower_bound_impl(ranges::begin(__r), ranges::end(__r), __value, __comp_lhs_rhs_swapped, __proj);
57   }
58 };
59 } // namespace __upper_bound
60 
61 inline namespace __cpo {
62   inline constexpr auto upper_bound = __upper_bound::__fn{};
63 } // namespace __cpo
64 } // namespace ranges
65 
66 _LIBCPP_END_NAMESPACE_STD
67 
68 #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
69 
70 #endif // _LIBCPP___ALGORITHM_RANGES_UPPER_BOUND_H
71