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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CHRONO_MONTH_H11#define _LIBCPP___CHRONO_MONTH_H12 13#include <__chrono/duration.h>14#include <__compare/ordering.h>15#include <__config>16 17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)18# pragma GCC system_header19#endif20 21#if _LIBCPP_STD_VER >= 2022 23_LIBCPP_BEGIN_NAMESPACE_STD24 25namespace chrono {26 27class month {28private:29 unsigned char __m_;30 31public:32 month() = default;33 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr month(unsigned __val) noexcept34 : __m_(static_cast<unsigned char>(__val)) {}35 _LIBCPP_HIDE_FROM_ABI inline constexpr month& operator++() noexcept {36 *this += months{1};37 return *this;38 }39 _LIBCPP_HIDE_FROM_ABI inline constexpr month operator++(int) noexcept {40 month __tmp = *this;41 ++(*this);42 return __tmp;43 }44 _LIBCPP_HIDE_FROM_ABI inline constexpr month& operator--() noexcept {45 *this -= months{1};46 return *this;47 }48 _LIBCPP_HIDE_FROM_ABI inline constexpr month operator--(int) noexcept {49 month __tmp = *this;50 --(*this);51 return __tmp;52 }53 _LIBCPP_HIDE_FROM_ABI constexpr month& operator+=(const months& __m1) noexcept;54 _LIBCPP_HIDE_FROM_ABI constexpr month& operator-=(const months& __m1) noexcept;55 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator unsigned() const noexcept { return __m_; }56 _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __m_ >= 1 && __m_ <= 12; }57};58 59_LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const month& __lhs, const month& __rhs) noexcept {60 return static_cast<unsigned>(__lhs) == static_cast<unsigned>(__rhs);61}62 63_LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering operator<=>(const month& __lhs, const month& __rhs) noexcept {64 return static_cast<unsigned>(__lhs) <=> static_cast<unsigned>(__rhs);65}66 67_LIBCPP_HIDE_FROM_ABI inline constexpr month operator+(const month& __lhs, const months& __rhs) noexcept {68 auto const __mu = static_cast<long long>(static_cast<unsigned>(__lhs)) + (__rhs.count() - 1);69 auto const __yr = (__mu >= 0 ? __mu : __mu - 11) / 12;70 return month{static_cast<unsigned>(__mu - __yr * 12 + 1)};71}72 73_LIBCPP_HIDE_FROM_ABI inline constexpr month operator+(const months& __lhs, const month& __rhs) noexcept {74 return __rhs + __lhs;75}76 77_LIBCPP_HIDE_FROM_ABI inline constexpr month operator-(const month& __lhs, const months& __rhs) noexcept {78 return __lhs + -__rhs;79}80 81_LIBCPP_HIDE_FROM_ABI inline constexpr months operator-(const month& __lhs, const month& __rhs) noexcept {82 auto const __dm = static_cast<unsigned>(__lhs) - static_cast<unsigned>(__rhs);83 return months(__dm <= 11 ? __dm : __dm + 12);84}85 86_LIBCPP_HIDE_FROM_ABI inline constexpr month& month::operator+=(const months& __dm) noexcept {87 *this = *this + __dm;88 return *this;89}90 91_LIBCPP_HIDE_FROM_ABI inline constexpr month& month::operator-=(const months& __dm) noexcept {92 *this = *this - __dm;93 return *this;94}95 96inline constexpr month January{1};97inline constexpr month February{2};98inline constexpr month March{3};99inline constexpr month April{4};100inline constexpr month May{5};101inline constexpr month June{6};102inline constexpr month July{7};103inline constexpr month August{8};104inline constexpr month September{9};105inline constexpr month October{10};106inline constexpr month November{11};107inline constexpr month December{12};108 109} // namespace chrono110 111_LIBCPP_END_NAMESPACE_STD112 113#endif // _LIBCPP_STD_VER >= 20114 115#endif // _LIBCPP___CHRONO_MONTH_H116