[Interest] QDateTime and std::chrono

[Roger Leigh]

Hi folks,

Is there any recommended way to convert a QDateTime to a 
std::chrono::timepoint?  I'd like to take the value of 
QFileInfo::lastModified() and pass it to an interface using e.g. 
std::chrono<high_resolution_clock, milliseconds> (or nanoseconds).

However, making this work portably, including all the epoch and leap 
second issues, looks complicated and error-prone.  Has anyone got any 
suggestions for how best to do this?


Thanks,
Roger