Alex Shinn scripsit:
Perhaps then the Right Thing would be to redefine upper and lower to
> On the other hand, it just seems surprising enough that w/nocase on one
> case isn't equivalent to the union of all cases. And that (w/nocase
> upper) != (w/nocase lower). Enough so that it might be worth making
> an exception for this.
mean letters which are not only Lu or Ll as the case may be, but are
also part of a casing pair, when in the context of nocase.
On the other hand, PCRE can't do that.