Personally I care about vim (and some scripts I have), but I do think emacs assumes errors of the same format. It's generally easy to work with, and output by

Personally I care about vim (and some scripts I have), but I do think emacs assumes errors of the same format. It's generally easy to work with, and output by a lot of things (including [git] grep -n). For my use, what I care about is that important locations that I might want to visit appear at the beginning of the line as either "filename:line:col: " or "filename:line: ". Other lines can begin with "error[E0080]" - that does no harm. If others have more particular needs, I hope they voice them. (nhaehnle seems to want severity following location?)