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

[Kevin Rodgers]

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)))

I don't think "resulting from completion" is relevant when MUSTMATCH
(the fourth arg) is nil.

--
Kevin Rodgers