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_MIN_ELEMENT_H
10#define _LIBCPP___ALGORITHM_RANGES_MIN_ELEMENT_H
11
12#include <__algorithm/min_element.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#include <__utility/forward.h>
23
24#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
25#  pragma GCC system_header
26#endif
27
28_LIBCPP_PUSH_MACROS
29#include <__undef_macros>
30
31#if _LIBCPP_STD_VER >= 20
32
33_LIBCPP_BEGIN_NAMESPACE_STD
34
35namespace ranges {
36struct __min_element {
37  template <forward_iterator _Ip,
38            sentinel_for<_Ip> _Sp,
39            class _Proj                                             = identity,
40            indirect_strict_weak_order<projected<_Ip, _Proj>> _Comp = ranges::less>
41  [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Ip
42  operator()(_Ip __first, _Sp __last, _Comp __comp = {}, _Proj __proj = {}) const {
43    return std::__min_element(__first, __last, __comp, __proj);
44  }
45
46  template <forward_range _Rp,
47            class _Proj                                                         = identity,
48            indirect_strict_weak_order<projected<iterator_t<_Rp>, _Proj>> _Comp = ranges::less>
49  [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Rp>
50  operator()(_Rp&& __r, _Comp __comp = {}, _Proj __proj = {}) const {
51    return std::__min_element(ranges::begin(__r), ranges::end(__r), __comp, __proj);
52  }
53};
54
55inline namespace __cpo {
56inline constexpr auto min_element = __min_element{};
57} // namespace __cpo
58} // namespace ranges
59
60_LIBCPP_END_NAMESPACE_STD
61
62#endif // _LIBCPP_STD_VER >= 20
63
64_LIBCPP_POP_MACROS
65
66#endif // _LIBCPP___ALGORITHM_RANGES_MIN_ELEMENT_H