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Re: regex and case-fold-search problem

From: Kim F. Storm
Subject: Re: regex and case-fold-search problem
Date: 29 Aug 2002 14:33:42 +0200
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3.50

> Consider the situation that one writes this regexp
>       "[\000-\xffff]"
> to search only Unicode BMP chars in emacs-unicode.  I
> suspect that, if we implent the above method, compiling this
> regexp when case-fold-search is non-nil takes longer time
> than people usually expect.
> So, I agree with Stephen that his method is good enough.

IMO, it is wrong to handle case-fold-search for regexp ranges by
trying to modify the interpretation of the regex range.

Instead, the regex matcher should try to upcase and lowercase each
character in the string and see if either of these caracters are
within the given range.

Kim F. Storm <address@hidden> http://www.cua.dk

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