On Wed, 2002-09-04 at 00:01, Sean O'Rourke wrote: > On Tue, 3 Sep 2002, Luke Palmer wrote: > > > On Tue, 3 Sep 2002, Brent Dax wrote: > > > > > Damian Conway:
> > > # $roundor7 = rx /<<roundascii>+[17]>/ > > > # > > > # That is: the union of the two character classes. > > > > > > How can you be sure that <roundascii> is implemented as a character > > > class, as opposed to (say) an alternation? > > > > What's the difference? :) > None, I think. Of course, if we ignore internals, there's no difference > bewteen that and "rx /<roundascii> | 1 | 7/". Then, why is there a C<+>? Why not make it C<|>? $foo = rx/ <<a>|<b>|[cde]>|f /