> >          $roundor7 = rx /<<roundascii>+[17]>/
> > That is: the union of the two character classes.
>
> Thank you; that wasn't in A5, E5 or S5. Will there be <<foo>-<bar>> as
> well?

>From A5:

    The outer <...> also naturally serves as a container
    for any extra syntax we decide to come up with for
    character set manipulation:

        <[_]+<alpha>+<digit>-<Swedish>>

--
ralph

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