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 32 class year { 33 private: 34 short __y_; 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 { ++__y_; return *this; } 40 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator++(int) noexcept { year __tmp = *this; ++(*this); return __tmp; } 41 _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator--() noexcept { --__y_; return *this; } 42 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator--(int) noexcept { year __tmp = *this; --(*this); return __tmp; } 43 _LIBCPP_HIDE_FROM_ABI constexpr year& operator+=(const years& __dy) noexcept; 44 _LIBCPP_HIDE_FROM_ABI constexpr year& operator-=(const years& __dy) noexcept; 45 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+() const noexcept { return *this; } 46 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator-() const noexcept { return year{-__y_}; } 47 48 _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_leap() const noexcept { return __y_ % 4 == 0 && (__y_ % 100 != 0 || __y_ % 400 == 0); } 49 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator int() const noexcept { return __y_; } 50 _LIBCPP_HIDE_FROM_ABI constexpr bool ok() const noexcept; 51 _LIBCPP_HIDE_FROM_ABI static inline constexpr year min() noexcept { return year{-32767}; } 52 _LIBCPP_HIDE_FROM_ABI static inline constexpr year max() noexcept { return year{ 32767}; } 53 }; 54 55 56 _LIBCPP_HIDE_FROM_ABI inline constexpr 57 bool operator==(const year& __lhs, const year& __rhs) noexcept 58 { return static_cast<int>(__lhs) == static_cast<int>(__rhs); } 59 60 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(const year& __lhs, const year& __rhs) noexcept { 61 return static_cast<int>(__lhs) <=> static_cast<int>(__rhs); 62 } 63 64 _LIBCPP_HIDE_FROM_ABI inline constexpr 65 year operator+ (const year& __lhs, const years& __rhs) noexcept 66 { return year(static_cast<int>(__lhs) + __rhs.count()); } 67 68 _LIBCPP_HIDE_FROM_ABI inline constexpr 69 year operator+ (const years& __lhs, const year& __rhs) noexcept 70 { return __rhs + __lhs; } 71 72 _LIBCPP_HIDE_FROM_ABI inline constexpr 73 year operator- (const year& __lhs, const years& __rhs) noexcept 74 { return __lhs + -__rhs; } 75 76 _LIBCPP_HIDE_FROM_ABI inline constexpr 77 years operator-(const year& __lhs, const year& __rhs) noexcept 78 { return years{static_cast<int>(__lhs) - static_cast<int>(__rhs)}; } 79 80 81 _LIBCPP_HIDE_FROM_ABI inline constexpr 82 year& year::operator+=(const years& __dy) noexcept 83 { *this = *this + __dy; return *this; } 84 85 _LIBCPP_HIDE_FROM_ABI inline constexpr 86 year& year::operator-=(const years& __dy) noexcept 87 { *this = *this - __dy; return *this; } 88 89 _LIBCPP_HIDE_FROM_ABI constexpr bool year::ok() const noexcept { 90 static_assert(static_cast<int>(std::numeric_limits<decltype(__y_)>::max()) == static_cast<int>(max())); 91 return static_cast<int>(min()) <= __y_; 92 } 93 94 } // namespace chrono 95 96 _LIBCPP_END_NAMESPACE_STD 97 98 #endif // _LIBCPP_STD_VER >= 20 99 100 _LIBCPP_POP_MACROS 101 102 #endif // _LIBCPP___CHRONO_YEAR_H 103