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;
year(int __val)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
is_leap()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;
min()50 _LIBCPP_HIDE_FROM_ABI static inline constexpr year min() noexcept { return year{-32767}; }
max()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
ok()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