Theory on error handling?

Question

Most advice concerning error handling boils down to a handful of tips and tricks (see this post for example). These hints are helpful but I think they don\'t answer all question

Answer 1

Is logging something that should only be done in application code? Or is it ok to do some logging from library code.

Just wanted to comment on this. My view is to never logg directly in the library code, but provide hooks or callbacks to implement this in the application code, so the application can decide what to do with the output from the log (if anything at all).