how to implement ~user completion [was: Re: Any (brave :-) mew users?]

Hrvoje> Hrvoje> Hrvoje> Maybe, and maybe not. I still think file_name_completion is the right Hrvoje> place to change, but if you present arguments otherwise, I can stand Hrvoje> corrected. I've looked into this a bit more. The problems I see with changing file_name_completion are: - As things corrently stand, Ffile_name_completion is getting called with file="~userna" and dirname=default-directory. So you'd need to have file-name-completion return username completions any time the file name begins with "~", no matter what the directory. It seems highly bogus to ignore the directory and do username completion in this function. It might be OK to do it if the dirname were empty or nil. - This approach does not work for read-directory-name, as it does not call file-name-completion. So it seems to make more sense to hack read-file-name-internal-1 in minibuf.el, in the same place that environment variables are handled. This will work for read-directory-name too. So I'd add two primitives, user-name-completion and user-name-all-completions, and fix the code in minibuf.el to use them. greg