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 <limits> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_PUSH_MACROS 22 #include <__undef_macros> 23 24 #if _LIBCPP_STD_VER > 17 25 26 _LIBCPP_BEGIN_NAMESPACE_STD 27 28 namespace chrono 29 { 30 31 class year { 32 private: 33 short __y; 34 public: 35 _LIBCPP_HIDE_FROM_ABI year() = default; 36 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr year(int __val) noexcept : __y(static_cast<short>(__val)) {} 37 38 _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator++() noexcept { ++__y; return *this; } 39 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator++(int) noexcept { year __tmp = *this; ++(*this); return __tmp; } 40 _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator--() noexcept { --__y; return *this; } 41 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator--(int) noexcept { year __tmp = *this; --(*this); return __tmp; } 42 _LIBCPP_HIDE_FROM_ABI constexpr year& operator+=(const years& __dy) noexcept; 43 _LIBCPP_HIDE_FROM_ABI constexpr year& operator-=(const years& __dy) noexcept; 44 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+() const noexcept { return *this; } 45 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator-() const noexcept { return year{-__y}; } 46 47 _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_leap() const noexcept { return __y % 4 == 0 && (__y % 100 != 0 || __y % 400 == 0); } 48 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator int() const noexcept { return __y; } 49 _LIBCPP_HIDE_FROM_ABI constexpr bool ok() const noexcept; 50 _LIBCPP_HIDE_FROM_ABI static inline constexpr year min() noexcept { return year{-32767}; } 51 _LIBCPP_HIDE_FROM_ABI static inline constexpr year max() noexcept { return year{ 32767}; } 52 }; 53 54 55 _LIBCPP_HIDE_FROM_ABI inline constexpr 56 bool operator==(const year& __lhs, const year& __rhs) noexcept 57 { return static_cast<int>(__lhs) == static_cast<int>(__rhs); } 58 59 _LIBCPP_HIDE_FROM_ABI inline constexpr 60 bool operator!=(const year& __lhs, const year& __rhs) noexcept 61 { return !(__lhs == __rhs); } 62 63 _LIBCPP_HIDE_FROM_ABI inline constexpr 64 bool operator< (const year& __lhs, const year& __rhs) noexcept 65 { return static_cast<int>(__lhs) < static_cast<int>(__rhs); } 66 67 _LIBCPP_HIDE_FROM_ABI inline constexpr 68 bool operator> (const year& __lhs, const year& __rhs) noexcept 69 { return __rhs < __lhs; } 70 71 _LIBCPP_HIDE_FROM_ABI inline constexpr 72 bool operator<=(const year& __lhs, const year& __rhs) noexcept 73 { return !(__rhs < __lhs); } 74 75 _LIBCPP_HIDE_FROM_ABI inline constexpr 76 bool operator>=(const year& __lhs, const year& __rhs) noexcept 77 { return !(__lhs < __rhs); } 78 79 _LIBCPP_HIDE_FROM_ABI inline constexpr 80 year operator+ (const year& __lhs, const years& __rhs) noexcept 81 { return year(static_cast<int>(__lhs) + __rhs.count()); } 82 83 _LIBCPP_HIDE_FROM_ABI inline constexpr 84 year operator+ (const years& __lhs, const year& __rhs) noexcept 85 { return __rhs + __lhs; } 86 87 _LIBCPP_HIDE_FROM_ABI inline constexpr 88 year operator- (const year& __lhs, const years& __rhs) noexcept 89 { return __lhs + -__rhs; } 90 91 _LIBCPP_HIDE_FROM_ABI inline constexpr 92 years operator-(const year& __lhs, const year& __rhs) noexcept 93 { return years{static_cast<int>(__lhs) - static_cast<int>(__rhs)}; } 94 95 96 _LIBCPP_HIDE_FROM_ABI inline constexpr 97 year& year::operator+=(const years& __dy) noexcept 98 { *this = *this + __dy; return *this; } 99 100 _LIBCPP_HIDE_FROM_ABI inline constexpr 101 year& year::operator-=(const years& __dy) noexcept 102 { *this = *this - __dy; return *this; } 103 104 _LIBCPP_HIDE_FROM_ABI constexpr bool year::ok() const noexcept { 105 static_assert(static_cast<int>(std::numeric_limits<decltype(__y)>::max()) == static_cast<int>(max())); 106 return static_cast<int>(min()) <= __y; 107 } 108 109 } // namespace chrono 110 111 _LIBCPP_END_NAMESPACE_STD 112 113 #endif // _LIBCPP_STD_VER > 17 114 115 _LIBCPP_POP_MACROS 116 117 #endif // _LIBCPP___CHRONO_YEAR_H 118