libcxx/include/__chrono/monthday.h

   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 <__compare/ordering.h>
  17 #include <__config>
  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