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 #if _LIBCPP_STD_VER >= 20 32 33 _LIBCPP_BEGIN_NAMESPACE_STD 34 35 namespace ranges { 36 37 template <class _T1> 38 using minmax_element_result = min_max_result<_T1>; 39 40 namespace __minmax_element { 41 struct __fn { 42 template <forward_iterator _Ip, sentinel_for<_Ip> _Sp, class _Proj = identity, 43 indirect_strict_weak_order<projected<_Ip, _Proj>> _Comp = ranges::less> 44 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr operator__fn45 ranges::minmax_element_result<_Ip> operator()(_Ip __first, _Sp __last, _Comp __comp = {}, _Proj __proj = {}) const { 46 auto __ret = std::__minmax_element_impl(std::move(__first), std::move(__last), __comp, __proj); 47 return {__ret.first, __ret.second}; 48 } 49 50 template <forward_range _Rp, class _Proj = identity, 51 indirect_strict_weak_order<projected<iterator_t<_Rp>, _Proj>> _Comp = ranges::less> 52 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr 53 ranges::minmax_element_result<borrowed_iterator_t<_Rp>> operator__fn54 operator()(_Rp&& __r, _Comp __comp = {}, _Proj __proj = {}) const { 55 auto __ret = std::__minmax_element_impl(ranges::begin(__r), ranges::end(__r), __comp, __proj); 56 return {__ret.first, __ret.second}; 57 } 58 }; 59 } // namespace __minmax_element 60 61 inline namespace __cpo { 62 inline constexpr auto minmax_element = __minmax_element::__fn{}; 63 } // namespace __cpo 64 65 } // namespace ranges 66 67 _LIBCPP_END_NAMESPACE_STD 68 69 #endif // _LIBCPP_STD_VER >= 20 70 71 #endif // _LIBCPP___ALGORITHM_RANGES_MINMAX_H 72