bug#18051: 24.3.92; ls-lisp: Sorting; make ls-lisp-string-lessp a normal function?

[Eli Zaretskii <eliz@gnu.org>]

> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: michael_heerdegen@web.de,  18051@debbugs.gnu.org
> Date: Sat, 23 Aug 2014 22:32:00 +0200
> 
> >> > Btw, I wonder whether we should have a way to pass the locale string
> >> > explicitly, instead of relying on $LC_COLLATE.
> >> 
> >> We could add an optional argument to string-collate-*. But this would
> >> break signature equivalence with string-lessp and string-equal,
> >> respectively.
> >> 
> >> Or we could introduce a global var, which shall be let-bound to the
> >> locale string.
> >
> > Or have a new optional argument in string-lessp etc., or introduce a
> > new set of APIs which will accept a locale, and have string-lessp
> > etc. call them with that argument nil.
> 
> An optional argument to string-lessp could be inconvenient. IMHO, the
> most important use-case of string-lessp is being a PREDICATE of
> sort. This does not support optional arguments.

In those cases, we should add the same optional argument to the sort
function.

> Extended patch appended.

Thanks.

I wonder what should this do if the new locale cannot be
instantiated/installed.  As you wrote the code, it will silently use
the current locale, but I wonder if that's TRT.

Other than that, I think you should install this.