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_MONTH_H 11 #define _LIBCPP___CHRONO_YEAR_MONTH_H 12 13 #include <__chrono/duration.h> 14 #include <__chrono/month.h> 15 #include <__chrono/year.h> 16 #include <__config> 17 #include <compare> 18 19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20 # pragma GCC system_header 21 #endif 22 23 #if _LIBCPP_STD_VER >= 20 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 namespace chrono { 28 29 class year_month { 30 chrono::year __y_; 31 chrono::month __m_; 32 33 public: 34 year_month() = default; 35 _LIBCPP_HIDE_FROM_ABI constexpr year_month(const chrono::year& __yval, const chrono::month& __mval) noexcept 36 : __y_{__yval}, __m_{__mval} {} 37 _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::year year() const noexcept { return __y_; } 38 _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::month month() const noexcept { return __m_; } 39 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator+=(const months& __dm) noexcept; 40 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator-=(const months& __dm) noexcept; 41 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator+=(const years& __dy) noexcept; 42 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator-=(const years& __dy) noexcept; 43 _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __y_.ok() && __m_.ok(); } 44 }; 45 46 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator/(const year& __y, const month& __m) noexcept { 47 return year_month{__y, __m}; 48 } 49 50 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator/(const year& __y, int __m) noexcept { 51 return year_month{__y, month(__m)}; 52 } 53 54 _LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const year_month& __lhs, const year_month& __rhs) noexcept { 55 return __lhs.year() == __rhs.year() && __lhs.month() == __rhs.month(); 56 } 57 58 _LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering 59 operator<=>(const year_month& __lhs, const year_month& __rhs) noexcept { 60 if (auto __c = __lhs.year() <=> __rhs.year(); __c != 0) 61 return __c; 62 return __lhs.month() <=> __rhs.month(); 63 } 64 65 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator+(const year_month& __lhs, const months& __rhs) noexcept { 66 int __dmi = static_cast<int>(static_cast<unsigned>(__lhs.month())) - 1 + __rhs.count(); 67 const int __dy = (__dmi >= 0 ? __dmi : __dmi - 11) / 12; 68 __dmi = __dmi - __dy * 12 + 1; 69 return (__lhs.year() + years(__dy)) / month(static_cast<unsigned>(__dmi)); 70 } 71 72 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator+(const months& __lhs, const year_month& __rhs) noexcept { 73 return __rhs + __lhs; 74 } 75 76 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator+(const year_month& __lhs, const years& __rhs) noexcept { 77 return (__lhs.year() + __rhs) / __lhs.month(); 78 } 79 80 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator+(const years& __lhs, const year_month& __rhs) noexcept { 81 return __rhs + __lhs; 82 } 83 84 _LIBCPP_HIDE_FROM_ABI inline constexpr months operator-(const year_month& __lhs, const year_month& __rhs) noexcept { 85 return (__lhs.year() - __rhs.year()) + 86 months(static_cast<unsigned>(__lhs.month()) - static_cast<unsigned>(__rhs.month())); 87 } 88 89 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator-(const year_month& __lhs, const months& __rhs) noexcept { 90 return __lhs + -__rhs; 91 } 92 93 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month operator-(const year_month& __lhs, const years& __rhs) noexcept { 94 return __lhs + -__rhs; 95 } 96 97 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& year_month::operator+=(const months& __dm) noexcept { 98 *this = *this + __dm; 99 return *this; 100 } 101 102 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& year_month::operator-=(const months& __dm) noexcept { 103 *this = *this - __dm; 104 return *this; 105 } 106 107 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& year_month::operator+=(const years& __dy) noexcept { 108 *this = *this + __dy; 109 return *this; 110 } 111 112 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& year_month::operator-=(const years& __dy) noexcept { 113 *this = *this - __dy; 114 return *this; 115 } 116 117 } // namespace chrono 118 119 _LIBCPP_END_NAMESPACE_STD 120 121 #endif // _LIBCPP_STD_VER >= 20 122 123 #endif // _LIBCPP___CHRONO_YEAR_MONTH_H 124