xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_minmax_element.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_MINMAX_ELEMENT_H
1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_MINMAX_ELEMENT_H
1181ad6265SDimitry Andric 
1281ad6265SDimitry Andric #include <__algorithm/min_max_result.h>
1381ad6265SDimitry Andric #include <__algorithm/minmax_element.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 #include <__utility/forward.h>
2481ad6265SDimitry Andric #include <__utility/move.h>
2581ad6265SDimitry Andric #include <__utility/pair.h>
2681ad6265SDimitry Andric 
2781ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
2881ad6265SDimitry Andric #  pragma GCC system_header
2981ad6265SDimitry Andric #endif
3081ad6265SDimitry Andric 
31b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS
32b3edf446SDimitry Andric #include <__undef_macros>
33b3edf446SDimitry Andric 
3406c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
3581ad6265SDimitry Andric 
3681ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
3781ad6265SDimitry Andric 
3881ad6265SDimitry Andric namespace ranges {
3981ad6265SDimitry Andric 
4081ad6265SDimitry Andric template <class _T1>
4181ad6265SDimitry Andric using minmax_element_result = min_max_result<_T1>;
4281ad6265SDimitry Andric 
4381ad6265SDimitry Andric namespace __minmax_element {
4481ad6265SDimitry Andric struct __fn {
4506c3fb27SDimitry Andric   template <forward_iterator _Ip,
4606c3fb27SDimitry Andric             sentinel_for<_Ip> _Sp,
4706c3fb27SDimitry Andric             class _Proj                                             = identity,
4881ad6265SDimitry Andric             indirect_strict_weak_order<projected<_Ip, _Proj>> _Comp = ranges::less>
49*0fca6ea1SDimitry Andric   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr ranges::minmax_element_result<_Ip>
5006c3fb27SDimitry Andric   operator()(_Ip __first, _Sp __last, _Comp __comp = {}, _Proj __proj = {}) const {
5181ad6265SDimitry Andric     auto __ret = std::__minmax_element_impl(std::move(__first), std::move(__last), __comp, __proj);
5281ad6265SDimitry Andric     return {__ret.first, __ret.second};
5381ad6265SDimitry Andric   }
5481ad6265SDimitry Andric 
5506c3fb27SDimitry Andric   template <forward_range _Rp,
5606c3fb27SDimitry Andric             class _Proj                                                         = identity,
5781ad6265SDimitry Andric             indirect_strict_weak_order<projected<iterator_t<_Rp>, _Proj>> _Comp = ranges::less>
58*0fca6ea1SDimitry Andric   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr ranges::minmax_element_result<borrowed_iterator_t<_Rp>>
5981ad6265SDimitry Andric   operator()(_Rp&& __r, _Comp __comp = {}, _Proj __proj = {}) const {
6081ad6265SDimitry Andric     auto __ret = std::__minmax_element_impl(ranges::begin(__r), ranges::end(__r), __comp, __proj);
6181ad6265SDimitry Andric     return {__ret.first, __ret.second};
6281ad6265SDimitry Andric   }
6381ad6265SDimitry Andric };
6481ad6265SDimitry Andric } // namespace __minmax_element
6581ad6265SDimitry Andric 
6681ad6265SDimitry Andric inline namespace __cpo {
6781ad6265SDimitry Andric inline constexpr auto minmax_element = __minmax_element::__fn{};
6881ad6265SDimitry Andric } // namespace __cpo
6981ad6265SDimitry Andric 
7081ad6265SDimitry Andric } // namespace ranges
7181ad6265SDimitry Andric 
7281ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD
7381ad6265SDimitry Andric 
7406c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
7581ad6265SDimitry Andric 
76b3edf446SDimitry Andric _LIBCPP_POP_MACROS
77b3edf446SDimitry Andric 
7881ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_MINMAX_H
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