On Mon Nov 30 10:13:09 EST 2009, jason.cat...@gmail.com wrote:
> > it turns out that doing regular expressions is difficult, since
> > it's not clear to me what [a-z] should match when unfolded.
> 
> I have discovered a truly marvellous proof of this, which this memory
> is too narrow to contain.
> 
> 209 runes in an unfolded a-Ǯ superclass later...
> 12498: signal: sys: segmentation violation

size isn't the real issue.  the real issue is determining what
the ranges are for other than the base character.  if a maps
to [aa'...] and z maps to [zz'...]  it's not clear that [a'-z'] is a
sensible set.  for example what does [e-f] map to?  [e-f], clearly
but [ë-what?]

- erik

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