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help with a typechecking error message
It looks like the only way the Prelude allows us to form expressions
that denote (already defined) characters is with the construction
char(n)
where n is some natural below 128. Is that right? It would be nice if
there were single quote character terms--'A', 'a', 'B', 'b',... correlated
to strings in the expected way, so that, for example,
char2stringA: lemma 'A' = seq("A")(0)
would be true. I don't see any way of defining such expressions.
Mark Aronszajn
Reusable Software Research Group
West Virginia University