26 Time library [time]

26.8 The civil calendar [time.cal]

26.8.5 Class year [time.cal.year]

26.8.5.2 Member functions [time.cal.year.members]

constexpr explicit year(int y) noexcept;
Effects: Constructs an object of type year by initializing y_­ with y.
The value held is unspecified if y is not in the range [-32767, 32767].
constexpr year& operator++() noexcept;
Effects: ++y_­.
Returns: *this.
constexpr year operator++(int) noexcept;
Effects: ++(*this).
Returns: A copy of *this as it existed on entry to this member function.
constexpr year& operator--() noexcept;
Effects: --y_­.
Returns: *this.
constexpr year operator--(int) noexcept;
Effects: --(*this).
Returns: A copy of *this as it existed on entry to this member function.
constexpr year& operator+=(const years& y) noexcept;
Effects: *this = *this + y.
Returns: *this.
constexpr year& operator-=(const years& y) noexcept;
Effects: *this = *this - y.
Returns: *this.
constexpr year operator+() const noexcept;
Returns: *this.
constexpr year year::operator-() const noexcept;
Returns: year{-y_­}.
constexpr bool is_leap() const noexcept;
Returns: y_­ % 4 == 0 && (y_­ % 100 != 0 || y_­ % 400 == 0).
constexpr explicit operator int() const noexcept;
Returns: y_­.
constexpr bool ok() const noexcept;
Returns: min() <= y_­ && y_­ <= max().
static constexpr year min() noexcept;
Returns: year{-32767}.
static constexpr year max() noexcept;
Returns: year{32767}.