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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 <__compare/ordering.h>
17#include <__config>
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
27namespace chrono {
28
29class year_month {
30 chrono::year __y_;
31 chrono::month __m_;
32
33public:
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
59operator<=>(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