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Re: variant record & cases

Quoting "Ricardo H. Medel":
> I'm reading the book "Essentials of Programming Languages" by Friedman,
> Wand and Haynes, 2nd edition, and I'm trying to use DrScheme (version 101,
> yes, I know, I know, it's rather old!) to implement the exercises. But I
> don't know how to define a "variant record" and how to use an expression
> "cases" with it.

Upgrade to version 103, and then see the "Home Configuration" section
of

  http://www.cs.utah.edu/classes/cs3520/

Matthew