mirror of
https://github.com/jart/cosmopolitan.git
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115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___CHRONO_MONTH_H
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#define _LIBCPP___CHRONO_MONTH_H
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#include <__chrono/duration.h>
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#include <__config>
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#include <compare>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if _LIBCPP_STD_VER >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace chrono {
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class month {
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private:
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unsigned char __m_;
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public:
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month() = default;
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_LIBCPP_HIDE_FROM_ABI explicit inline constexpr month(unsigned __val) noexcept
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: __m_(static_cast<unsigned char>(__val)) {}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month& operator++() noexcept {
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*this += months{1};
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month operator++(int) noexcept {
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month __tmp = *this;
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++(*this);
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return __tmp;
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month& operator--() noexcept {
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*this -= months{1};
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month operator--(int) noexcept {
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month __tmp = *this;
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--(*this);
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return __tmp;
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}
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_LIBCPP_HIDE_FROM_ABI constexpr month& operator+=(const months& __m1) noexcept;
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_LIBCPP_HIDE_FROM_ABI constexpr month& operator-=(const months& __m1) noexcept;
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_LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator unsigned() const noexcept { return __m_; }
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_LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __m_ >= 1 && __m_ <= 12; }
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};
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_LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const month& __lhs, const month& __rhs) noexcept {
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return static_cast<unsigned>(__lhs) == static_cast<unsigned>(__rhs);
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering operator<=>(const month& __lhs, const month& __rhs) noexcept {
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return static_cast<unsigned>(__lhs) <=> static_cast<unsigned>(__rhs);
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month operator+(const month& __lhs, const months& __rhs) noexcept {
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auto const __mu = static_cast<long long>(static_cast<unsigned>(__lhs)) + (__rhs.count() - 1);
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auto const __yr = (__mu >= 0 ? __mu : __mu - 11) / 12;
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return month{static_cast<unsigned>(__mu - __yr * 12 + 1)};
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month operator+(const months& __lhs, const month& __rhs) noexcept {
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return __rhs + __lhs;
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month operator-(const month& __lhs, const months& __rhs) noexcept {
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return __lhs + -__rhs;
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr months operator-(const month& __lhs, const month& __rhs) noexcept {
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auto const __dm = static_cast<unsigned>(__lhs) - static_cast<unsigned>(__rhs);
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return months(__dm <= 11 ? __dm : __dm + 12);
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month& month::operator+=(const months& __dm) noexcept {
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*this = *this + __dm;
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI inline constexpr month& month::operator-=(const months& __dm) noexcept {
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*this = *this - __dm;
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return *this;
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}
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inline constexpr month January{1};
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inline constexpr month February{2};
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inline constexpr month March{3};
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inline constexpr month April{4};
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inline constexpr month May{5};
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inline constexpr month June{6};
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inline constexpr month July{7};
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inline constexpr month August{8};
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inline constexpr month September{9};
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inline constexpr month October{10};
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inline constexpr month November{11};
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inline constexpr month December{12};
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} // namespace chrono
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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#endif // _LIBCPP___CHRONO_MONTH_H
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