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_MONTH_H 11 #define _LIBCPP___CHRONO_MONTH_H 12 13 #include <__chrono/duration.h> 14 #include <__config> 15 #include <compare> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 #if _LIBCPP_STD_VER >= 20 22 23 _LIBCPP_BEGIN_NAMESPACE_STD 24 25 namespace chrono { 26 27 class month { 28 private: 29 unsigned char __m_; 30 31 public: 32 month() = default; 33 _LIBCPP_HIDE_FROM_ABI explicit inline constexpr month(unsigned __val) noexcept 34 : __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 96 inline constexpr month January{1}; 97 inline constexpr month February{2}; 98 inline constexpr month March{3}; 99 inline constexpr month April{4}; 100 inline constexpr month May{5}; 101 inline constexpr month June{6}; 102 inline constexpr month July{7}; 103 inline constexpr month August{8}; 104 inline constexpr month September{9}; 105 inline constexpr month October{10}; 106 inline constexpr month November{11}; 107 inline constexpr month December{12}; 108 109 } // namespace chrono 110 111 _LIBCPP_END_NAMESPACE_STD 112 113 #endif // _LIBCPP_STD_VER >= 20 114 115 #endif // _LIBCPP___CHRONO_MONTH_H 116