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 <__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
  30 class month_day {
  31 private:
  32    chrono::month __m_;
  33    chrono::day   __d_;
  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
  44 bool month_day::ok() const noexcept
  45 {
  46     if (!__m_.ok()) return false;
  47     const unsigned __dval = static_cast<unsigned>(__d_);
  48     if (__dval < 1 || __dval > 31) return false;
  49     if (__dval <= 29) return true;
  50 //  Now we've got either 30 or 31
  51     const unsigned __mval = static_cast<unsigned>(__m_);
  52     if (__mval == 2) return false;
  53     if (__mval == 4 || __mval == 6 || __mval == 9 || __mval == 11)
  54         return __dval == 30;
  55     return true;
  56 }
  57
  58 _LIBCPP_HIDE_FROM_ABI inline constexpr
  59 bool operator==(const month_day& __lhs, const month_day& __rhs) noexcept
  60 { return __lhs.month() == __rhs.month() && __lhs.day() == __rhs.day(); }
  61
  62 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(const month_day& __lhs, const month_day& __rhs) noexcept {
  63     if (auto __c = __lhs.month() <=> __rhs.month(); __c != 0)
  64         return __c;
  65     return __lhs.day() <=> __rhs.day();
  66 }
  67
  68 _LIBCPP_HIDE_FROM_ABI inline constexpr
  69 month_day operator/(const month& __lhs, const day& __rhs) noexcept
  70 { return month_day{__lhs, __rhs}; }
  71
  72 _LIBCPP_HIDE_FROM_ABI constexpr
  73 month_day operator/(const day& __lhs, const month& __rhs) noexcept
  74 { return __rhs / __lhs; }
  75
  76 _LIBCPP_HIDE_FROM_ABI inline constexpr
  77 month_day operator/(const month& __lhs, int __rhs) noexcept
  78 { return __lhs / day(__rhs); }
  79
  80 _LIBCPP_HIDE_FROM_ABI constexpr
  81 month_day operator/(int __lhs, const day& __rhs) noexcept
  82 { return month(__lhs) / __rhs; }
  83
  84 _LIBCPP_HIDE_FROM_ABI constexpr
  85 month_day operator/(const day& __lhs, int __rhs) noexcept
  86 { return month(__rhs) / __lhs; }
  87
  88 class month_day_last {
  89 private:
  90     chrono::month __m_;
  91 public:
  92     _LIBCPP_HIDE_FROM_ABI explicit constexpr month_day_last(const chrono::month& __val) noexcept
  93         : __m_{__val} {}
  94     _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::month month() const noexcept { return __m_; }
  95     _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __m_.ok(); }
  96 };
  97
  98 _LIBCPP_HIDE_FROM_ABI inline constexpr
  99 bool operator==(const month_day_last& __lhs, const month_day_last& __rhs) noexcept
 100 { return __lhs.month() == __rhs.month(); }
 101
 102 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering
 103 operator<=>(const month_day_last& __lhs, const month_day_last& __rhs) noexcept {
 104     return __lhs.month() <=> __rhs.month();
 105 }
 106
 107 _LIBCPP_HIDE_FROM_ABI inline constexpr
 108 month_day_last operator/(const month& __lhs, last_spec) noexcept
 109 { return month_day_last{__lhs}; }
 110
 111 _LIBCPP_HIDE_FROM_ABI inline constexpr
 112 month_day_last operator/(last_spec, const month& __rhs) noexcept
 113 { return month_day_last{__rhs}; }
 114
 115 _LIBCPP_HIDE_FROM_ABI inline constexpr
 116 month_day_last operator/(int __lhs, last_spec) noexcept
 117 { return month_day_last{month(__lhs)}; }
 118
 119 _LIBCPP_HIDE_FROM_ABI inline constexpr
 120 month_day_last operator/(last_spec, int __rhs) noexcept
 121 { return month_day_last{month(__rhs)}; }
 122
 123 } // namespace chrono
 124
 125 _LIBCPP_END_NAMESPACE_STD
 126
 127 #endif // _LIBCPP_STD_VER >= 20
 128
 129 #endif // _LIBCPP___CHRONO_MONTHDAY_H