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_DAY_H
11#define _LIBCPP___CHRONO_DAY_H
12
13#include <__chrono/duration.h>
14#include <__compare/ordering.h>
15#include <__config>
16#include <__cstddef/size_t.h>
17#include <__functional/hash.h>
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 day {
30private:
31 unsigned char __d_;
32
33public:
34 day() = default;
35 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr day(unsigned __val) noexcept
36 : __d_(static_cast<unsigned char>(__val)) {}
37 _LIBCPP_HIDE_FROM_ABI inline constexpr day& operator++() noexcept {
38 ++__d_;
39 return *this;
40 }
41 _LIBCPP_HIDE_FROM_ABI inline constexpr day operator++(int) noexcept {
42 day __tmp = *this;
43 ++(*this);
44 return __tmp;
45 }
46 _LIBCPP_HIDE_FROM_ABI inline constexpr day& operator--() noexcept {
47 --__d_;
48 return *this;
49 }
50 _LIBCPP_HIDE_FROM_ABI inline constexpr day operator--(int) noexcept {
51 day __tmp = *this;
52 --(*this);
53 return __tmp;
54 }
55 _LIBCPP_HIDE_FROM_ABI constexpr day& operator+=(const days& __dd) noexcept;
56 _LIBCPP_HIDE_FROM_ABI constexpr day& operator-=(const days& __dd) noexcept;
57 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator unsigned() const noexcept { return __d_; }
58 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __d_ >= 1 && __d_ <= 31; }
59};
60
61_LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const day& __lhs, const day& __rhs) noexcept {
62 return static_cast<unsigned>(__lhs) == static_cast<unsigned>(__rhs);
63}
64
65_LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering operator<=>(const day& __lhs, const day& __rhs) noexcept {
66 return static_cast<unsigned>(__lhs) <=> static_cast<unsigned>(__rhs);
67}
68
69[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline constexpr day operator+(const day& __lhs, const days& __rhs) noexcept {
70 return day(static_cast<unsigned>(__lhs) + __rhs.count());
71}
72
73[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline constexpr day operator+(const days& __lhs, const day& __rhs) noexcept {
74 return __rhs + __lhs;
75}
76
77[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline constexpr day operator-(const day& __lhs, const days& __rhs) noexcept {
78 return __lhs + -__rhs;
79}
80
81[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline constexpr days operator-(const day& __lhs, const day& __rhs) noexcept {
82 return days(static_cast<int>(static_cast<unsigned>(__lhs)) - static_cast<int>(static_cast<unsigned>(__rhs)));
83}
84
85_LIBCPP_HIDE_FROM_ABI inline constexpr day& day::operator+=(const days& __dd) noexcept {
86 *this = *this + __dd;
87 return *this;
88}
89
90_LIBCPP_HIDE_FROM_ABI inline constexpr day& day::operator-=(const days& __dd) noexcept {
91 *this = *this - __dd;
92 return *this;
93}
94
95} // namespace chrono
96
97# if _LIBCPP_STD_VER >= 26
98
99template <>
100struct hash<chrono::day> {
101 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI static size_t operator()(const chrono::day& __d) noexcept {
102 return static_cast<unsigned>(__d);
103 }
104};
105
106# endif // _LIBCPP_STD_VER >= 26
107
108_LIBCPP_END_NAMESPACE_STD
109
110#endif // _LIBCPP_STD_VER >= 20
111
112#endif // _LIBCPP___CHRONO_DAY_H
113