< cpp‎ | chrono‎ | utc clock
Utilities library
General utilities
Date and time
Function objects
Formatting library (C++20)
Relational operators (deprecated in C++20)
Integer comparison functions
Swap and type operations
Common vocabulary types
Elementary string conversions
template< class Duration >

static std::chrono::utc_time<std::common_type_t<Duration, std::chrono::seconds>>

    from_sys( const std::chrono::sys_time<Duration>& t );
(since C++20)

Converts a sys_time t to a utc_time u that represents the same point in time.

u.time_since_epoch() - t.time_since_epoch() is equal to the number of leap seconds that was inserted between t and 1 January 1970. If t is the exact date of a leap second insertion, that leap second is counted as inserted.

[edit] Return value

A utc_time representing the same point in time as t.

[edit] See also

converts utc_time to sys_time
(public static member function) [edit]
convert time points of one clock to another
(function template) [edit]