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Bob Wyman scripsit:
> Depending on your needs, a "SEQUENCE OF CHOICE" might give you
> what you want. i.e. order is preserved because it is a sequence, not a
> set, yet the actual type of each element in the sequence is any of the
> elements in the choice list.
Which of course is exactly what (foo|bar|baz)* is.
Winter: MIT, John Cowan
Keio, INRIA, email@example.com
Issue lots of Drafts. http://www.ccil.org/~cowan
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Might simplicity return? (A "tanka", or extended haiku)