Re: read-file-name: resulting file name must satisfy predicate ?

[Lennart Borgman]

Kevin Rodgers wrote:
> Lennart Borgman wrote:
> > The doc string for `read-file-name' says
> >
> >    If optional sixth arg predicate is non-nil, possible completions and
> >    the resulting file name must satisfy (funcall predicate NAME).
> >
> > However testing with
> >
> >    (read-file-name "File: " nil nil nil nil (lambda(name) 
> > (string-match "wantname")))
> >
> > and entering some characters for the file name and then pressing 
> > <RET> just seem to return whatever the mini-buffer shows. Maybe this 
> > is correct. The doc string could be read as "resulting file name from 
> > completion". But it is in my opinion still unclear and a bit unexpected.
> >
> > This is on w32. GNU Emacs 22.0.50.1 (i386-mingw-nt5.0.2195) of 
> > 2006-03-28.
>
> Does it work if you pass the required second arg to string-match:
>
> (read-file-name "File: " nil nil nil nil
>                 (lambda (name) (string-match "wantname" name)))
Oh, sorry. I should train my cut-and-paste. ;-) -- but no.  It is still 
the same behaviour.
> I don't think "resulting from completion" is relevant when MUSTMATCH
> (the fourth arg) is nil.
Yes, you are right. But do you get the same behaviour as me?