[RFA] use filename_completer for add_setshow_optional_filename_cmd

[Pedro Alves]

(following the spirit of speaking up if you spent the time
 looking at the patch)

A Tuesday 01 July 2008 22:37:42, Pierre Muller wrote:
>   I discovered that
> set debug-file-directory does not use filename_completer.
>
>   This is because add_setshow_optional_filename_cmd
> does not set the set completer to filename completer,
> contrary to add_setshow_filename_cmd.
>
>   Is there any reason for this?
> Or is it just a bug?

IMHO, it's just a feature miss.

>   The following small patch fixes this
> by setting the set part completer to filename_completer
> for  add_setshow_optional_filename_cmd
> exactly as is done in add_setshow_filename_cmd.
>
>   There are currently only three adffected commands:
>
> "set debug-file-directory"
> "set args"
> "set solib-search-path"
>
>   Only the second one might be questionable,
> but I also find that it is reasonable to have filename
> completion for "set args" as this is now done on
> most shells.
>

IMHO, it does make more sense to have a filename completer
in "set args," than a default symbol completer.  You're normally
not very interested in passing symbol names as arguments to
your program.

> Is this OK to commit?

FWIW, looks good to me.

-- 
Pedro Alves