1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _LIBCPP___CHRONO_YEAR_H 11 #define _LIBCPP___CHRONO_YEAR_H 12 13 #include <__chrono/duration.h> 14 #include <__config> 15 #include <compare> 16 #include <limits> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 # pragma GCC system_header 20 #endif 21 22 _LIBCPP_PUSH_MACROS 23 #include <__undef_macros> 24 25 #if _LIBCPP_STD_VER >= 20 26 27 _LIBCPP_BEGIN_NAMESPACE_STD 28 29 namespace chrono { 30 31 class year { 32 private: 33 short __y_; 34 35 public: 36 year() = default; 37 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr year(int __val) noexcept : __y_(static_cast<short>(__val)) {} 38 39 _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator++() noexcept { 40 ++__y_; 41 return *this; 42 } 43 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator++(int) noexcept { 44 year __tmp = *this; 45 ++(*this); 46 return __tmp; 47 } 48 _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator--() noexcept { 49 --__y_; 50 return *this; 51 } 52 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator--(int) noexcept { 53 year __tmp = *this; 54 --(*this); 55 return __tmp; 56 } 57 _LIBCPP_HIDE_FROM_ABI constexpr year& operator+=(const years& __dy) noexcept; 58 _LIBCPP_HIDE_FROM_ABI constexpr year& operator-=(const years& __dy) noexcept; 59 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+() const noexcept { return *this; } 60 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator-() const noexcept { return year{-__y_}; } 61 62 _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_leap() const noexcept { 63 return __y_ % 4 == 0 && (__y_ % 100 != 0 || __y_ % 400 == 0); 64 } 65 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator int() const noexcept { return __y_; } 66 _LIBCPP_HIDE_FROM_ABI constexpr bool ok() const noexcept; 67 _LIBCPP_HIDE_FROM_ABI static inline constexpr year min() noexcept { return year{-32767}; } 68 _LIBCPP_HIDE_FROM_ABI static inline constexpr year max() noexcept { return year{32767}; } 69 }; 70 71 _LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const year& __lhs, const year& __rhs) noexcept { 72 return static_cast<int>(__lhs) == static_cast<int>(__rhs); 73 } 74 75 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(const year& __lhs, const year& __rhs) noexcept { 76 return static_cast<int>(__lhs) <=> static_cast<int>(__rhs); 77 } 78 79 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+(const year& __lhs, const years& __rhs) noexcept { 80 return year(static_cast<int>(__lhs) + __rhs.count()); 81 } 82 83 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+(const years& __lhs, const year& __rhs) noexcept { 84 return __rhs + __lhs; 85 } 86 87 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator-(const year& __lhs, const years& __rhs) noexcept { 88 return __lhs + -__rhs; 89 } 90 91 _LIBCPP_HIDE_FROM_ABI inline constexpr years operator-(const year& __lhs, const year& __rhs) noexcept { 92 return years{static_cast<int>(__lhs) - static_cast<int>(__rhs)}; 93 } 94 95 _LIBCPP_HIDE_FROM_ABI inline constexpr year& year::operator+=(const years& __dy) noexcept { 96 *this = *this + __dy; 97 return *this; 98 } 99 100 _LIBCPP_HIDE_FROM_ABI inline constexpr year& year::operator-=(const years& __dy) noexcept { 101 *this = *this - __dy; 102 return *this; 103 } 104 105 _LIBCPP_HIDE_FROM_ABI constexpr bool year::ok() const noexcept { 106 static_assert(static_cast<int>(std::numeric_limits<decltype(__y_)>::max()) == static_cast<int>(max())); 107 return static_cast<int>(min()) <= __y_; 108 } 109 110 } // namespace chrono 111 112 _LIBCPP_END_NAMESPACE_STD 113 114 #endif // _LIBCPP_STD_VER >= 20 115 116 _LIBCPP_POP_MACROS 117 118 #endif // _LIBCPP___CHRONO_YEAR_H 119