On Wed, 6 Jul 2011, Ian Childs wrote:
Yes they are Haskell expressions - I called them terms because actually they
are GADTs of type Term a and Term b. I can't use type 'b -> c' as they are
part of a larger pattern.
I have a function that returns a witness to 's :: Term a' and 't :: Term b'
having the same type, if they do, but I am wondering how to extend this to
the first argument of an arrow type.
Can you give us a bit more (but not too much) code in order to show the
problem?
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