Re: [DISCUSSION] Sorting strings in Org mode vs. system locale

[Max Nikulin]

On 07/05/2024 20:09, Ihor Radchenko wrote:
> Max Nikulin writes:
>
> > I consider the following as a kind of graceful degradation
> >
> > (defun org-sort-function-fallback-downcase
> >      (a b &optional LOCALE IGNORE-CASE)
> >    (if ignore-case
> >       (string-collate-lessp (downcase a) (downcase b) locale ignore-case)
> >     (string-collate-lessp a b locale ignore-case)))
>
> It is indeed better than `org-sort-function-downcase'.

`compare-strings' with upcase conversion under the hood may be an 
alternative.

> > I would consider a setter function for `org-sort-function' to avoid
> > branches based of `func-arity' in `org-string<'.
>
> Setter is not reliable when setq is used, so I prefer arity check.

I bothers me as well. Another idea is to require 2 optional argument and 
thus wrappers for 2 argument functions. My expectation that extra 
function call still may be cheaper.