[Bug: 21.4.12] mail-extr.el broken for ISO-8859-2

[Stephen J. Turnbull]

>>>>> "Jan" == Jan Rychter <jan at rychter.com> writes:

    Jan> But on the other hand, there is no reason not to be able to
    Jan> use character classes in regexps, either.

In Mule regexps there is a \c construct which matches a user-definable
class.  I'm not sure if it works correctly in XEmacs.  If it does, it
should be fairly easy to reuse that code to implement hard-coded
classes for [:alpha:] and the like.

Unfortunately, the POSIX classes like [:alpha:] are probably not
well-defined in a Mule environment.

Eg, you say that "you don't let non-ISO-8859-2 characters into your
BBDB".  I think that we really want (to have the option of) character
classes being locale-dependent.

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