libcxx/include/__chrono/day.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_DAY_H
  11 #define _LIBCPP___CHRONO_DAY_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
  28 class day {
  29 private:
  30     unsigned char __d_;
  31 public:
  32     day() = default;
  33     _LIBCPP_HIDE_FROM_ABI explicit inline constexpr day(unsigned __val) noexcept : __d_(static_cast<unsigned char>(__val)) {}
  34     _LIBCPP_HIDE_FROM_ABI inline constexpr day& operator++()    noexcept { ++__d_; return *this; }
  35     _LIBCPP_HIDE_FROM_ABI inline constexpr day  operator++(int) noexcept { day __tmp = *this; ++(*this); return __tmp; }
  36     _LIBCPP_HIDE_FROM_ABI inline constexpr day& operator--()    noexcept { --__d_; return *this; }
  37     _LIBCPP_HIDE_FROM_ABI inline constexpr day  operator--(int) noexcept { day __tmp = *this; --(*this); return __tmp; }
  38     _LIBCPP_HIDE_FROM_ABI        constexpr day& operator+=(const days& __dd) noexcept;
  39     _LIBCPP_HIDE_FROM_ABI        constexpr day& operator-=(const days& __dd) noexcept;
  40     _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator unsigned() const noexcept { return __d_; }
  41     _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __d_ >= 1 && __d_ <= 31; }
  42   };
  43
  44
  45 _LIBCPP_HIDE_FROM_ABI inline constexpr
  46 bool operator==(const day& __lhs, const day& __rhs) noexcept
  47 { return static_cast<unsigned>(__lhs) == static_cast<unsigned>(__rhs); }
  48
  49 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(const day& __lhs, const day& __rhs) noexcept {
  50   return static_cast<unsigned>(__lhs) <=> static_cast<unsigned>(__rhs);
  51 }
  52
  53 _LIBCPP_HIDE_FROM_ABI inline constexpr
  54 day operator+ (const day& __lhs, const days& __rhs) noexcept
  55 { return day(static_cast<unsigned>(__lhs) + __rhs.count()); }
  56
  57 _LIBCPP_HIDE_FROM_ABI inline constexpr
  58 day operator+ (const days& __lhs, const day& __rhs) noexcept
  59 { return __rhs + __lhs; }
  60
  61 _LIBCPP_HIDE_FROM_ABI inline constexpr
  62 day operator- (const day& __lhs, const days& __rhs) noexcept
  63 { return __lhs + -__rhs; }
  64
  65 _LIBCPP_HIDE_FROM_ABI inline constexpr
  66 days operator-(const day& __lhs, const day& __rhs) noexcept
  67 { return days(static_cast<int>(static_cast<unsigned>(__lhs)) -
  68               static_cast<int>(static_cast<unsigned>(__rhs))); }
  69
  70 _LIBCPP_HIDE_FROM_ABI inline constexpr
  71 day& day::operator+=(const days& __dd) noexcept
  72 { *this = *this + __dd; return *this; }
  73
  74 _LIBCPP_HIDE_FROM_ABI inline constexpr
  75 day& day::operator-=(const days& __dd) noexcept
  76 { *this = *this - __dd; return *this; }
  77
  78 } // namespace chrono
  79
  80 _LIBCPP_END_NAMESPACE_STD
  81
  82 #endif // _LIBCPP_STD_VER >= 20
  83
  84 #endif // _LIBCPP___CHRONO_DAY_H