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_MAX_ELEMENT_H 1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_MAX_ELEMENT_H 1181ad6265SDimitry Andric 1281ad6265SDimitry Andric #include <__algorithm/ranges_min_element.h> 1381ad6265SDimitry Andric #include <__config> 1481ad6265SDimitry Andric #include <__functional/identity.h> 1581ad6265SDimitry Andric #include <__functional/invoke.h> 1681ad6265SDimitry Andric #include <__functional/ranges_operations.h> 1781ad6265SDimitry Andric #include <__iterator/concepts.h> 1881ad6265SDimitry Andric #include <__iterator/projected.h> 1981ad6265SDimitry Andric #include <__ranges/access.h> 2081ad6265SDimitry Andric #include <__ranges/concepts.h> 2181ad6265SDimitry Andric #include <__ranges/dangling.h> 2281ad6265SDimitry Andric 2381ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2481ad6265SDimitry Andric # pragma GCC system_header 2581ad6265SDimitry Andric #endif 2681ad6265SDimitry Andric 27b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 28b3edf446SDimitry Andric #include <__undef_macros> 29b3edf446SDimitry Andric 3006c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 3181ad6265SDimitry Andric 3281ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 3381ad6265SDimitry Andric 3481ad6265SDimitry Andric namespace ranges { 3581ad6265SDimitry Andric namespace __max_element { 3681ad6265SDimitry Andric struct __fn { 3706c3fb27SDimitry Andric template <forward_iterator _Ip, 3806c3fb27SDimitry Andric sentinel_for<_Ip> _Sp, 3906c3fb27SDimitry Andric class _Proj = identity, 4081ad6265SDimitry Andric indirect_strict_weak_order<projected<_Ip, _Proj>> _Comp = ranges::less> 41*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Ip 4206c3fb27SDimitry Andric operator()(_Ip __first, _Sp __last, _Comp __comp = {}, _Proj __proj = {}) const { 435f757f3fSDimitry Andric auto __comp_lhs_rhs_swapped = [&](auto&& __lhs, auto&& __rhs) -> bool { return std::invoke(__comp, __rhs, __lhs); }; 4481ad6265SDimitry Andric return ranges::__min_element_impl(__first, __last, __comp_lhs_rhs_swapped, __proj); 4581ad6265SDimitry Andric } 4681ad6265SDimitry Andric 4706c3fb27SDimitry Andric template <forward_range _Rp, 4806c3fb27SDimitry Andric class _Proj = identity, 4981ad6265SDimitry Andric indirect_strict_weak_order<projected<iterator_t<_Rp>, _Proj>> _Comp = ranges::less> 50*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Rp> 5106c3fb27SDimitry Andric operator()(_Rp&& __r, _Comp __comp = {}, _Proj __proj = {}) const { 525f757f3fSDimitry Andric auto __comp_lhs_rhs_swapped = [&](auto&& __lhs, auto&& __rhs) -> bool { return std::invoke(__comp, __rhs, __lhs); }; 5381ad6265SDimitry Andric return ranges::__min_element_impl(ranges::begin(__r), ranges::end(__r), __comp_lhs_rhs_swapped, __proj); 5481ad6265SDimitry Andric } 5581ad6265SDimitry Andric }; 5681ad6265SDimitry Andric } // namespace __max_element 5781ad6265SDimitry Andric 5881ad6265SDimitry Andric inline namespace __cpo { 5981ad6265SDimitry Andric inline constexpr auto max_element = __max_element::__fn{}; 6081ad6265SDimitry Andric } // namespace __cpo 6181ad6265SDimitry Andric } // namespace ranges 6281ad6265SDimitry Andric 6381ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD 6481ad6265SDimitry Andric 6506c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 6681ad6265SDimitry Andric 67b3edf446SDimitry Andric _LIBCPP_POP_MACROS 68b3edf446SDimitry Andric 6981ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_MAX_ELEMENT_H 70