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_MINMAX_ELEMENT_H 10 #define _LIBCPP___ALGORITHM_RANGES_MINMAX_ELEMENT_H 11 12 #include <__algorithm/min_max_result.h> 13 #include <__algorithm/minmax_element.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 #include <__utility/forward.h> 24 #include <__utility/move.h> 25 #include <__utility/pair.h> 26 27 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 28 # pragma GCC system_header 29 #endif 30 31 _LIBCPP_PUSH_MACROS 32 #include <__undef_macros> 33 34 #if _LIBCPP_STD_VER >= 20 35 36 _LIBCPP_BEGIN_NAMESPACE_STD 37 38 namespace ranges { 39 40 template <class _T1> 41 using minmax_element_result = min_max_result<_T1>; 42 43 struct __minmax_element { 44 template <forward_iterator _Ip, 45 sentinel_for<_Ip> _Sp, 46 class _Proj = identity, 47 indirect_strict_weak_order<projected<_Ip, _Proj>> _Comp = ranges::less> 48 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr ranges::minmax_element_result<_Ip> 49 operator()(_Ip __first, _Sp __last, _Comp __comp = {}, _Proj __proj = {}) const { 50 auto __ret = std::__minmax_element_impl(std::move(__first), std::move(__last), __comp, __proj); 51 return {__ret.first, __ret.second}; 52 } 53 54 template <forward_range _Rp, 55 class _Proj = identity, 56 indirect_strict_weak_order<projected<iterator_t<_Rp>, _Proj>> _Comp = ranges::less> 57 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr ranges::minmax_element_result<borrowed_iterator_t<_Rp>> 58 operator()(_Rp&& __r, _Comp __comp = {}, _Proj __proj = {}) const { 59 auto __ret = std::__minmax_element_impl(ranges::begin(__r), ranges::end(__r), __comp, __proj); 60 return {__ret.first, __ret.second}; 61 } 62 }; 63 64 inline namespace __cpo { 65 inline constexpr auto minmax_element = __minmax_element{}; 66 } // namespace __cpo 67 68 } // namespace ranges 69 70 _LIBCPP_END_NAMESPACE_STD 71 72 #endif // _LIBCPP_STD_VER >= 20 73 74 _LIBCPP_POP_MACROS 75 76 #endif // _LIBCPP___ALGORITHM_RANGES_MINMAX_H 77