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 <__compare/ordering.h>
  15 #include <__config>
  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 day {
  28 private:
  29   unsigned char __d_;
  30
  31 public:
  32   day() = default;
  33   _LIBCPP_HIDE_FROM_ABI explicit inline constexpr day(unsigned __val) noexcept
  34       : __d_(static_cast<unsigned char>(__val)) {}
  35   _LIBCPP_HIDE_FROM_ABI inline constexpr day& operator++() noexcept {
  36     ++__d_;
  37     return *this;
  38   }
  39   _LIBCPP_HIDE_FROM_ABI inline constexpr day operator++(int) noexcept {
  40     day __tmp = *this;
  41     ++(*this);
  42     return __tmp;
  43   }
  44   _LIBCPP_HIDE_FROM_ABI inline constexpr day& operator--() noexcept {
  45     --__d_;
  46     return *this;
  47   }
  48   _LIBCPP_HIDE_FROM_ABI inline constexpr day operator--(int) noexcept {
  49     day __tmp = *this;
  50     --(*this);
  51     return __tmp;
  52   }
  53   _LIBCPP_HIDE_FROM_ABI constexpr day& operator+=(const days& __dd) noexcept;
  54   _LIBCPP_HIDE_FROM_ABI constexpr day& operator-=(const days& __dd) noexcept;
  55   _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator unsigned() const noexcept { return __d_; }
  56   _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __d_ >= 1 && __d_ <= 31; }
  57 };
  58
  59 _LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const day& __lhs, const day& __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 day& __lhs, const day& __rhs) noexcept {
  64   return static_cast<unsigned>(__lhs) <=> static_cast<unsigned>(__rhs);
  65 }
  66
  67 _LIBCPP_HIDE_FROM_ABI inline constexpr day operator+(const day& __lhs, const days& __rhs) noexcept {
  68   return day(static_cast<unsigned>(__lhs) + __rhs.count());
  69 }
  70
  71 _LIBCPP_HIDE_FROM_ABI inline constexpr day operator+(const days& __lhs, const day& __rhs) noexcept {
  72   return __rhs + __lhs;
  73 }
  74
  75 _LIBCPP_HIDE_FROM_ABI inline constexpr day operator-(const day& __lhs, const days& __rhs) noexcept {
  76   return __lhs + -__rhs;
  77 }
  78
  79 _LIBCPP_HIDE_FROM_ABI inline constexpr days operator-(const day& __lhs, const day& __rhs) noexcept {
  80   return days(static_cast<int>(static_cast<unsigned>(__lhs)) - static_cast<int>(static_cast<unsigned>(__rhs)));
  81 }
  82
  83 _LIBCPP_HIDE_FROM_ABI inline constexpr day& day::operator+=(const days& __dd) noexcept {
  84   *this = *this + __dd;
  85   return *this;
  86 }
  87
  88 _LIBCPP_HIDE_FROM_ABI inline constexpr day& day::operator-=(const days& __dd) noexcept {
  89   *this = *this - __dd;
  90   return *this;
  91 }
  92
  93 } // namespace chrono
  94
  95 _LIBCPP_END_NAMESPACE_STD
  96
  97 #endif // _LIBCPP_STD_VER >= 20
  98
  99 #endif // _LIBCPP___CHRONO_DAY_H