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 <__config>
  15 #include <compare>
  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
  32 class year {
  33 private:
  34     short __y_;
  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 { ++__y_; return *this; }
  40     _LIBCPP_HIDE_FROM_ABI inline constexpr year  operator++(int) noexcept { year __tmp = *this; ++(*this); return __tmp; }
  41     _LIBCPP_HIDE_FROM_ABI inline constexpr year& operator--()    noexcept { --__y_; return *this; }
  42     _LIBCPP_HIDE_FROM_ABI inline constexpr year  operator--(int) noexcept { year __tmp = *this; --(*this); return __tmp; }
  43     _LIBCPP_HIDE_FROM_ABI        constexpr year& operator+=(const years& __dy) noexcept;
  44     _LIBCPP_HIDE_FROM_ABI        constexpr year& operator-=(const years& __dy) noexcept;
  45     _LIBCPP_HIDE_FROM_ABI inline constexpr year operator+() const noexcept { return *this; }
  46     _LIBCPP_HIDE_FROM_ABI inline constexpr year operator-() const noexcept { return year{-__y_}; }
  47
  48     _LIBCPP_HIDE_FROM_ABI inline constexpr bool is_leap() const noexcept { return __y_ % 4 == 0 && (__y_ % 100 != 0 || __y_ % 400 == 0); }
  49     _LIBCPP_HIDE_FROM_ABI explicit inline constexpr operator int() const noexcept { return __y_; }
  50     _LIBCPP_HIDE_FROM_ABI        constexpr bool ok() const noexcept;
  51     _LIBCPP_HIDE_FROM_ABI static inline constexpr year min() noexcept { return year{-32767}; }
  52     _LIBCPP_HIDE_FROM_ABI static inline constexpr year max() noexcept { return year{ 32767}; }
  53 };
  54
  55
  56 _LIBCPP_HIDE_FROM_ABI inline constexpr
  57 bool operator==(const year& __lhs, const year& __rhs) noexcept
  58 { return static_cast<int>(__lhs) == static_cast<int>(__rhs); }
  59
  60 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(const year& __lhs, const year& __rhs) noexcept {
  61     return static_cast<int>(__lhs) <=> static_cast<int>(__rhs);
  62 }
  63
  64 _LIBCPP_HIDE_FROM_ABI inline constexpr
  65 year operator+ (const year& __lhs, const years& __rhs) noexcept
  66 { return year(static_cast<int>(__lhs) + __rhs.count()); }
  67
  68 _LIBCPP_HIDE_FROM_ABI inline constexpr
  69 year operator+ (const years& __lhs, const year& __rhs) noexcept
  70 { return __rhs + __lhs; }
  71
  72 _LIBCPP_HIDE_FROM_ABI inline constexpr
  73 year operator- (const year& __lhs, const years& __rhs) noexcept
  74 { return __lhs + -__rhs; }
  75
  76 _LIBCPP_HIDE_FROM_ABI inline constexpr
  77 years operator-(const year& __lhs, const year& __rhs) noexcept
  78 { return years{static_cast<int>(__lhs) - static_cast<int>(__rhs)}; }
  79
  80
  81 _LIBCPP_HIDE_FROM_ABI inline constexpr
  82 year& year::operator+=(const years& __dy) noexcept
  83 { *this = *this + __dy; return *this; }
  84
  85 _LIBCPP_HIDE_FROM_ABI inline constexpr
  86 year& year::operator-=(const years& __dy) noexcept
  87 { *this = *this - __dy; return *this; }
  88
  89 _LIBCPP_HIDE_FROM_ABI constexpr bool year::ok() const noexcept {
  90   static_assert(static_cast<int>(std::numeric_limits<decltype(__y_)>::max()) == static_cast<int>(max()));
  91   return static_cast<int>(min()) <= __y_;
  92 }
  93
  94 } // namespace chrono
  95
  96 _LIBCPP_END_NAMESPACE_STD
  97
  98 #endif // _LIBCPP_STD_VER >= 20
  99
 100 _LIBCPP_POP_MACROS
 101
 102 #endif // _LIBCPP___CHRONO_YEAR_H