| Yi Kong | 8328301 | 2023-12-13 12:57:00 +0900 | [diff] [blame^] | 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_MINMAX_H |
| 10 | #define _LIBCPP___ALGORITHM_MINMAX_H |
| 11 | |
| 12 | #include <__algorithm/comp.h> |
| 13 | #include <__algorithm/minmax_element.h> |
| 14 | #include <__config> |
| 15 | #include <__functional/identity.h> |
| 16 | #include <__type_traits/is_callable.h> |
| 17 | #include <__utility/pair.h> |
| 18 | #include <initializer_list> |
| 19 | |
| 20 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 21 | # pragma GCC system_header |
| 22 | #endif |
| 23 | |
| 24 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 25 | |
| 26 | template<class _Tp, class _Compare> |
| 27 | _LIBCPP_NODISCARD_EXT inline |
| 28 | _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14 |
| 29 | pair<const _Tp&, const _Tp&> |
| 30 | minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) |
| 31 | { |
| 32 | return __comp(__b, __a) ? pair<const _Tp&, const _Tp&>(__b, __a) : |
| 33 | pair<const _Tp&, const _Tp&>(__a, __b); |
| 34 | } |
| 35 | |
| 36 | template<class _Tp> |
| 37 | _LIBCPP_NODISCARD_EXT inline |
| 38 | _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14 |
| 39 | pair<const _Tp&, const _Tp&> |
| 40 | minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b) |
| 41 | { |
| 42 | return std::minmax(__a, __b, __less<>()); |
| 43 | } |
| 44 | |
| 45 | #ifndef _LIBCPP_CXX03_LANG |
| 46 | |
| 47 | template<class _Tp, class _Compare> |
| 48 | _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 |
| 49 | pair<_Tp, _Tp> minmax(initializer_list<_Tp> __t, _Compare __comp) { |
| 50 | static_assert(__is_callable<_Compare, _Tp, _Tp>::value, "The comparator has to be callable"); |
| 51 | __identity __proj; |
| 52 | auto __ret = std::__minmax_element_impl(__t.begin(), __t.end(), __comp, __proj); |
| 53 | return pair<_Tp, _Tp>(*__ret.first, *__ret.second); |
| 54 | } |
| 55 | |
| 56 | template<class _Tp> |
| 57 | _LIBCPP_NODISCARD_EXT inline |
| 58 | _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14 |
| 59 | pair<_Tp, _Tp> |
| 60 | minmax(initializer_list<_Tp> __t) |
| 61 | { |
| 62 | return std::minmax(__t, __less<>()); |
| 63 | } |
| 64 | |
| 65 | #endif // _LIBCPP_CXX03_LANG |
| 66 | |
| 67 | _LIBCPP_END_NAMESPACE_STD |
| 68 | |
| 69 | #endif // _LIBCPP___ALGORITHM_MINMAX_H |