std::chrono::operator==,<,<=,>,>=,<=>(std::chrono::leap_second)

 

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std::chrono::leap_second

成员函数

leap_second::date

非成员函数

operator==operator<operator<=operator>operator>=operator<=>

 

定义于头文件 <chrono>
constexpr bool operator==( const std::chrono::leap_second& x,                            const std::chrono::leap_second& y ) noexcept;	(1)	(C++20 起)
constexpr std::strong_ordering operator<=>( const std::chrono::leap_second& x,                                             const std::chrono::leap_second& y ) noexcept;	(2)	(C++20 起)
template< class Duration > constexpr bool operator==( const std::chrono::leap_second& x,                            const std::chrono::sys_time<Duration>& y ) noexcept;	(3)	(C++20 起)
template< class Duration > constexpr bool operator< ( const std::chrono::leap_second& x,                            const std::chrono::sys_time<Duration>& y ) noexcept;	(4)	(C++20 起)
template< class Duration > constexpr bool operator< ( const std::chrono::sys_time<Duration>& x,                            const std::chrono::leap_second& y ) noexcept;	(5)	(C++20 起)
template< class Duration > constexpr bool operator> ( const std::chrono::leap_second& x,                            const std::chrono::sys_time<Duration>& y ) noexcept;	(6)	(C++20 起)
template< class Duration > constexpr bool operator> ( const std::chrono::sys_time<Duration>& x,                            const std::chrono::leap_second& y ) noexcept;	(7)	(C++20 起)
template< class Duration > constexpr bool operator<=( const std::chrono::leap_second& x,                            const std::chrono::sys_time<Duration>& y ) noexcept;	(8)	(C++20 起)
template< class Duration > constexpr bool operator<=( const std::chrono::sys_time<Duration>& x,                            const std::chrono::leap_second& y ) noexcept;	(9)	(C++20 起)
template< class Duration > constexpr bool operator>=( const std::chrono::leap& x,                            const std::chrono::sys_time<Duration>& y ) noexcept;	(10)	(C++20 起)
template< class Duration > constexpr bool operator>=( const std::chrono::sys_time<Duration>& x,                            const std::chrono::leap_second& y ) noexcept;	(11)	(C++20 起)
template< class Duration >     requires std::three_way_comparable_with<         std:chrono::sys_seconds, std::chrono::sys_time<Duration>> constexpr auto operator<=>( const std::chrono::leap_second& x,                             const std::chrono::sys_time<Duration>& y ) noexcept;	(12)	(C++20 起)

比较对象 x 与 y 所表示的日期和时间。

(12) 的返回类型从 x.date() <=> y 推导，从而为 std::chrono::seconds 与 Duration 的三路比较结果类型。

!= 运算符从 operator== 合成。

返回值

1) x.date() == y.date()

2) x.date() <=> y.date()

3) x.date() == y

4) x.date() < y

5) x < y.date()

6) x.date() > y

7) x > y.date()

8) x.date() <= y

9) x <= y.date()

10) x.date() >= y

11) x >= y.date()

12) x.date() <=> y