xref: /freebsd-src/contrib/llvm-project/libcxx/include/__chrono/month.h (revision cb14a3fe5122c879eae1fb480ed7ce82a699ddb6)
181ad6265SDimitry Andric // -*- C++ -*-
281ad6265SDimitry Andric //===----------------------------------------------------------------------===//
381ad6265SDimitry Andric //
481ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
581ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
681ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
781ad6265SDimitry Andric //
881ad6265SDimitry Andric //===----------------------------------------------------------------------===//
981ad6265SDimitry Andric 
1081ad6265SDimitry Andric #ifndef _LIBCPP___CHRONO_MONTH_H
1181ad6265SDimitry Andric #define _LIBCPP___CHRONO_MONTH_H
1281ad6265SDimitry Andric 
1381ad6265SDimitry Andric #include <__chrono/duration.h>
1481ad6265SDimitry Andric #include <__config>
15bdd1243dSDimitry Andric #include <compare>
1681ad6265SDimitry Andric 
1781ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
1881ad6265SDimitry Andric #  pragma GCC system_header
1981ad6265SDimitry Andric #endif
2081ad6265SDimitry Andric 
2106c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
2281ad6265SDimitry Andric 
2381ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
2481ad6265SDimitry Andric 
25*cb14a3feSDimitry Andric namespace chrono {
2681ad6265SDimitry Andric 
2781ad6265SDimitry Andric class month {
2881ad6265SDimitry Andric private:
29bdd1243dSDimitry Andric   unsigned char __m_;
30*cb14a3feSDimitry Andric 
3181ad6265SDimitry Andric public:
3206c3fb27SDimitry Andric   month() = default;
month(unsigned __val)33*cb14a3feSDimitry Andric   _LIBCPP_HIDE_FROM_ABI explicit inline constexpr month(unsigned __val) noexcept
34*cb14a3feSDimitry Andric       : __m_(static_cast<unsigned char>(__val)) {}
35*cb14a3feSDimitry Andric   _LIBCPP_HIDE_FROM_ABI inline constexpr month& operator++() noexcept {
36*cb14a3feSDimitry Andric     *this += months{1};
37*cb14a3feSDimitry Andric     return *this;
38*cb14a3feSDimitry Andric   }
39*cb14a3feSDimitry Andric   _LIBCPP_HIDE_FROM_ABI inline constexpr month operator++(int) noexcept {
40*cb14a3feSDimitry Andric     month __tmp = *this;
41*cb14a3feSDimitry Andric     ++(*this);
42*cb14a3feSDimitry Andric     return __tmp;
43*cb14a3feSDimitry Andric   }
44*cb14a3feSDimitry Andric   _LIBCPP_HIDE_FROM_ABI inline constexpr month& operator--() noexcept {
45*cb14a3feSDimitry Andric     *this -= months{1};
46*cb14a3feSDimitry Andric     return *this;
47*cb14a3feSDimitry Andric   }
48*cb14a3feSDimitry Andric   _LIBCPP_HIDE_FROM_ABI inline constexpr month operator--(int) noexcept {
49*cb14a3feSDimitry Andric     month __tmp = *this;
50*cb14a3feSDimitry Andric     --(*this);
51*cb14a3feSDimitry Andric     return __tmp;
52*cb14a3feSDimitry Andric   }
5381ad6265SDimitry Andric   _LIBCPP_HIDE_FROM_ABI constexpr month& operator+=(const months& __m1) noexcept;
5481ad6265SDimitry Andric   _LIBCPP_HIDE_FROM_ABI constexpr month& operator-=(const months& __m1) noexcept;
55bdd1243dSDimitry Andric   _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator unsigned() const noexcept { return __m_; }
ok()56bdd1243dSDimitry Andric   _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __m_ >= 1 && __m_ <= 12; }
5781ad6265SDimitry Andric };
5881ad6265SDimitry Andric 
59*cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const month& __lhs, const month& __rhs) noexcept {
60*cb14a3feSDimitry Andric   return static_cast<unsigned>(__lhs) == static_cast<unsigned>(__rhs);
61*cb14a3feSDimitry Andric }
6281ad6265SDimitry Andric 
635f757f3fSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering operator<=>(const month& __lhs, const month& __rhs) noexcept {
64bdd1243dSDimitry Andric   return static_cast<unsigned>(__lhs) <=> static_cast<unsigned>(__rhs);
65bdd1243dSDimitry Andric }
6681ad6265SDimitry Andric 
67*cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr month operator+(const month& __lhs, const months& __rhs) noexcept {
6881ad6265SDimitry Andric   auto const __mu = static_cast<long long>(static_cast<unsigned>(__lhs)) + (__rhs.count() - 1);
6981ad6265SDimitry Andric   auto const __yr = (__mu >= 0 ? __mu : __mu - 11) / 12;
7081ad6265SDimitry Andric   return month{static_cast<unsigned>(__mu - __yr * 12 + 1)};
7181ad6265SDimitry Andric }
7281ad6265SDimitry Andric 
73*cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr month operator+(const months& __lhs, const month& __rhs) noexcept {
74*cb14a3feSDimitry Andric   return __rhs + __lhs;
75*cb14a3feSDimitry Andric }
7681ad6265SDimitry Andric 
77*cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr month operator-(const month& __lhs, const months& __rhs) noexcept {
78*cb14a3feSDimitry Andric   return __lhs + -__rhs;
79*cb14a3feSDimitry Andric }
8081ad6265SDimitry Andric 
81*cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr months operator-(const month& __lhs, const month& __rhs) noexcept {
8281ad6265SDimitry Andric   auto const __dm = static_cast<unsigned>(__lhs) - static_cast<unsigned>(__rhs);
8381ad6265SDimitry Andric   return months(__dm <= 11 ? __dm : __dm + 12);
8481ad6265SDimitry Andric }
8581ad6265SDimitry Andric 
86*cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr month& month::operator+=(const months& __dm) noexcept {
87*cb14a3feSDimitry Andric   *this = *this + __dm;
88*cb14a3feSDimitry Andric   return *this;
89*cb14a3feSDimitry Andric }
9081ad6265SDimitry Andric 
91*cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI inline constexpr month& month::operator-=(const months& __dm) noexcept {
92*cb14a3feSDimitry Andric   *this = *this - __dm;
93*cb14a3feSDimitry Andric   return *this;
94*cb14a3feSDimitry Andric }
9581ad6265SDimitry Andric 
9681ad6265SDimitry Andric inline constexpr month January{1};
9781ad6265SDimitry Andric inline constexpr month February{2};
9881ad6265SDimitry Andric inline constexpr month March{3};
9981ad6265SDimitry Andric inline constexpr month April{4};
10081ad6265SDimitry Andric inline constexpr month May{5};
10181ad6265SDimitry Andric inline constexpr month June{6};
10281ad6265SDimitry Andric inline constexpr month July{7};
10381ad6265SDimitry Andric inline constexpr month August{8};
10481ad6265SDimitry Andric inline constexpr month September{9};
10581ad6265SDimitry Andric inline constexpr month October{10};
10681ad6265SDimitry Andric inline constexpr month November{11};
10781ad6265SDimitry Andric inline constexpr month December{12};
10881ad6265SDimitry Andric 
10981ad6265SDimitry Andric } // namespace chrono
11081ad6265SDimitry Andric 
11181ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD
11281ad6265SDimitry Andric 
11306c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
11481ad6265SDimitry Andric 
11581ad6265SDimitry Andric #endif // _LIBCPP___CHRONO_MONTH_H
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