From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@coraid.com>
Date: Mon, 30 Nov 2009 11:00:08 -0500
To: 9fans@9fans.net
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Subject: Re: [9fans] =?utf-8?q?gr=C3=ABp_=28rhymes_with_creep=29_and_cptmp?=
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> ``unfold turns a character, say ë into the set of
> characters that can be folded to the same base
> character.  so
>        ; unfold ë
>        [eèéêëēĕėęěȅȇȩḕḗḙḛḝẹẻẽếềểễệ]''
>
> To me, that sounds like [e-f] should be
>
> [eèéêëēĕėęěȅȇȩḕḗḙḛḝẹẻẽếềểễệfƒ]
>
> iff e unfolds to the same set as ë. If e only unfolds to [e], then
> [e-f] would unfold to [ef].

i don't think that works.  consider [e-g].  normally
this would match 'f', but under your algorithm it wouldn't.
the problem is that [a-z] works because ascii is arranged
in alphabetical order.  all the various accented characters
are not.

that's why the folding approach has an advantage [a-z]
will work and will do the Right Thing.

- erik