Re: [yazicivo@ttnet.net.tr: Locale Dependent Downcasing in smtpmail]

[Kenichi Handa <handa@m17n.org>]

In article <87y7lahee5.fsf@ttnet.net.tr>, Volkan YAZICI <yazicivo@ttnet.net.tr> writes:

> > --- 691,704 ----
> >   			  (>= (car response-code) 400))
> >   		      (throw 'done nil)))
> >   	      (dolist (line (cdr (cdr response-code)))
> > ! 		(let ((name (mapcar (lambda (s)
> > ! 				      (setq s (downcase s))
> > ! 				      ;; If `I' is downcased to dotless-i,
> > ! 				      ;; convert it to `i'.
> > ! 				      (if (/= (downcase ?I) ?i)
> > ! 					  (subst-char-in-string
> > ! 					   (downcase ?I) ?i s t))

> Such a fix is quite unfeasible. What do you think to do for other
> problematic characters as well? Introduce a new if-else clause for
> every one?

To avoid such an ad-hoc fix, I must know the purpose of
downcasing here.  Do we need just "tr A-Z a-z"?  Or, do we
have to downcase also non-ASCII chars?  In the latter case,
what to do with conversion from dotted-I to `i' in Turkish?
Do we need such an advanced downcasing as "MASSE" -> "maße"
for German?

> I am not faimilar with introducing a new macro policy of emacs team
> but it'd probably be useful (handy?) to have something similar to this
> macro:

> (with-case-table 'ascii
>   ;; Any call to DOWNCASE/UPCASE within this (dynamic?) scope will use
>   ;; the case conversion table specified in the first argument of the
>   ;; WITH-CASE-TABLE macro.
>   ...)

I also thought about such a thing at first, but the above
questions rose, and unless I know clearly what to do,
anything I do will be ad-hoc.  So, I reached to the quite
localized fix (also by considering that the release is
near).

---
Kenichi Handa
handa@m17n.org