libcxx/include/__chrono/year.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_YEAR_H
  11 #define _LIBCPP___CHRONO_YEAR_H
  12
  13 #include <__chrono/duration.h>
  14 #include <__compare/ordering.h>
  15 #include <__config>
  16 #include <limits>
  17
  18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  19 #  pragma GCC system_header
  20 #endif
  21
  22 _LIBCPP_PUSH_MACROS
  23 #include <__undef_macros>
  24
  25 #if _LIBCPP_STD_VER >= 20
  26
  27 _LIBCPP_BEGIN_NAMESPACE_STD
  28
  29 namespace chrono {
  30
  31 class year {
  32 private:
  33   short __y_;
  34
  35 public:
  36   year() = default;
  37   _LIBCPP_HIDE_FROM_ABI explicit inline constexpr year(int __val) noexcept : __y_(static_cast<short>(__val)) {}
  38
  39   _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator++() noexcept {
  40     ++__y_;
  41     return *this;
  42   }
  43   _LIBCPP_HIDE_FROM_ABI inline constexpr year operator++(int) noexcept {
  44     year __tmp = *this;
  45     ++(*this);
  46     return __tmp;
  47   }
  48   _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator--() noexcept {
  49     --__y_;
  50     return *this;
  51   }
  52   _LIBCPP_HIDE_FROM_ABI inline constexpr year operator--(int) noexcept {
  53     year __tmp = *this;
  54     --(*this);
  55     return __tmp;
  56   }
  57   _LIBCPP_HIDE_FROM_ABI constexpr year& operator+=(const years& __dy) noexcept;
  58   _LIBCPP_HIDE_FROM_ABI constexpr year& operator-=(const years& __dy) noexcept;
  59   _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+() const noexcept { return *this; }
  60   _LIBCPP_HIDE_FROM_ABI inline constexpr year operator-() const noexcept { return year{-__y_}; }
  61
  62   _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_leap() const noexcept {
  63     return __y_ % 4 == 0 && (__y_ % 100 != 0 || __y_ % 400 == 0);
  64   }
  65   _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator int() const noexcept { return __y_; }
  66   _LIBCPP_HIDE_FROM_ABI constexpr bool ok() const noexcept;
  67   _LIBCPP_HIDE_FROM_ABI static inline constexpr year min() noexcept { return year{-32767}; }
  68   _LIBCPP_HIDE_FROM_ABI static inline constexpr year max() noexcept { return year{32767}; }
  69 };
  70
  71 _LIBCPP_HIDE_FROM_ABI inline constexpr bool operator==(const year& __lhs, const year& __rhs) noexcept {
  72   return static_cast<int>(__lhs) == static_cast<int>(__rhs);
  73 }
  74
  75 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(const year& __lhs, const year& __rhs) noexcept {
  76   return static_cast<int>(__lhs) <=> static_cast<int>(__rhs);
  77 }
  78
  79 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+(const year& __lhs, const years& __rhs) noexcept {
  80   return year(static_cast<int>(__lhs) + __rhs.count());
  81 }
  82
  83 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+(const years& __lhs, const year& __rhs) noexcept {
  84   return __rhs + __lhs;
  85 }
  86
  87 _LIBCPP_HIDE_FROM_ABI inline constexpr year operator-(const year& __lhs, const years& __rhs) noexcept {
  88   return __lhs + -__rhs;
  89 }
  90
  91 _LIBCPP_HIDE_FROM_ABI inline constexpr years operator-(const year& __lhs, const year& __rhs) noexcept {
  92   return years{static_cast<int>(__lhs) - static_cast<int>(__rhs)};
  93 }
  94
  95 _LIBCPP_HIDE_FROM_ABI inline constexpr year& year::operator+=(const years& __dy) noexcept {
  96   *this = *this + __dy;
  97   return *this;
  98 }
  99
 100 _LIBCPP_HIDE_FROM_ABI inline constexpr year& year::operator-=(const years& __dy) noexcept {
 101   *this = *this - __dy;
 102   return *this;
 103 }
 104
 105 _LIBCPP_HIDE_FROM_ABI constexpr bool year::ok() const noexcept {
 106   static_assert(static_cast<int>(std::numeric_limits<decltype(__y_)>::max()) == static_cast<int>(max()));
 107   return static_cast<int>(min()) <= __y_;
 108 }
 109
 110 } // namespace chrono
 111
 112 _LIBCPP_END_NAMESPACE_STD
 113
 114 #endif // _LIBCPP_STD_VER >= 20
 115
 116 _LIBCPP_POP_MACROS
 117
 118 #endif // _LIBCPP___CHRONO_YEAR_H