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_MONTHDAY_H 11 #define _LIBCPP___CHRONO_MONTHDAY_H 12 13 #include <__chrono/calendar.h> 14 #include <__chrono/day.h> 15 #include <__chrono/month.h> 16 #include <__config> 17 #include <compare> 18 19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20 # pragma GCC system_header 21 #endif 22 23 #if _LIBCPP_STD_VER >= 20 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 namespace chrono { 28 29 class month_day { 30 private: 31 chrono::month __m_; 32 chrono::day __d_; 33 34 public: 35 month_day() = default; 36 _LIBCPP_HIDE_FROM_ABI constexpr month_day(const chrono::month& __mval, const chrono::day& __dval) noexcept 37 : __m_{__mval}, __d_{__dval} {} 38 _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::month month() const noexcept { return __m_; } 39 _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::day day() const noexcept { return __d_; } 40 _LIBCPP_HIDE_FROM_ABI constexpr bool ok() const noexcept; 41 }; 42 43 _LIBCPP_HIDE_FROM_ABI inline constexpr bool month_day::ok() const noexcept { 44 if (!__m_.ok()) 45 return false; 46 const unsigned __dval = static_cast<unsigned>(__d_); 47 if (__dval < 1 || __dval > 31) 48 return false; 49 if (__dval <= 29) 50 return true; 51 // Now we've got either 30 or 31 52 const unsigned __mval = static_cast<unsigned>(__m_); 53 if (__mval == 2) 54 return false; 55 if (__mval == 4 || __mval == 6 || __mval == 9 || __mval == 11) 56 return __dval == 30; 57 return true; 58 } 59 60 _LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const month_day& __lhs, const month_day& __rhs) noexcept { 61 return __lhs.month() == __rhs.month() && __lhs.day() == __rhs.day(); 62 } 63 64 _LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering 65 operator<=>(const month_day& __lhs, const month_day& __rhs) noexcept { 66 if (auto __c = __lhs.month() <=> __rhs.month(); __c != 0) 67 return __c; 68 return __lhs.day() <=> __rhs.day(); 69 } 70 71 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day operator/(const month& __lhs, const day& __rhs) noexcept { 72 return month_day{__lhs, __rhs}; 73 } 74 75 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day operator/(const day& __lhs, const month& __rhs) noexcept { 76 return __rhs / __lhs; 77 } 78 79 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day operator/(const month& __lhs, int __rhs) noexcept { 80 return __lhs / day(__rhs); 81 } 82 83 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day operator/(int __lhs, const day& __rhs) noexcept { 84 return month(__lhs) / __rhs; 85 } 86 87 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day operator/(const day& __lhs, int __rhs) noexcept { 88 return month(__rhs) / __lhs; 89 } 90 91 class month_day_last { 92 private: 93 chrono::month __m_; 94 95 public: 96 _LIBCPP_HIDE_FROM_ABI explicit constexpr month_day_last(const chrono::month& __val) noexcept : __m_{__val} {} 97 _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::month month() const noexcept { return __m_; } 98 _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __m_.ok(); } 99 }; 100 101 _LIBCPP_HIDE_FROM_ABI inline constexpr bool 102 operator==(const month_day_last& __lhs, const month_day_last& __rhs) noexcept { 103 return __lhs.month() == __rhs.month(); 104 } 105 106 _LIBCPP_HIDE_FROM_ABI inline constexpr strong_ordering 107 operator<=>(const month_day_last& __lhs, const month_day_last& __rhs) noexcept { 108 return __lhs.month() <=> __rhs.month(); 109 } 110 111 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day_last operator/(const month& __lhs, last_spec) noexcept { 112 return month_day_last{__lhs}; 113 } 114 115 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day_last operator/(last_spec, const month& __rhs) noexcept { 116 return month_day_last{__rhs}; 117 } 118 119 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day_last operator/(int __lhs, last_spec) noexcept { 120 return month_day_last{month(__lhs)}; 121 } 122 123 _LIBCPP_HIDE_FROM_ABI inline constexpr month_day_last operator/(last_spec, int __rhs) noexcept { 124 return month_day_last{month(__rhs)}; 125 } 126 127 } // namespace chrono 128 129 _LIBCPP_END_NAMESPACE_STD 130 131 #endif // _LIBCPP_STD_VER >= 20 132 133 #endif // _LIBCPP___CHRONO_MONTHDAY_H 134