[time.clock.file.overview]

file_clock is an alias for a type meeting the Cpp17TrivialClock requirements ([time.clock.req]), and using a signed arithmetic type for file_clock::rep.

file_clock is used to create the time_point system used for file_time_type ([filesystems]).

Its epoch is unspecified, and noexcept(file_clock::now() is true.

[Note 1:

The type that file_clock denotes can be in a different namespace than std::chrono, such as std::filesystem.

— end note]

30 Time library [time]

30.7 Clocks [time.clock]

30.7.6 Type file_clock [time.clock.file]

30.7.6.1 Overview [time.clock.file.overview]