Version 1 (modified by john@…, 10 years ago) (diff)

Existential Quantifier

this means supporting the 'exists' quantifier as creating existential types much the same way 'forall' can be used in ghc. An example would be

type Any = exists a . Typeable a => a

sameType :: Any -> Any -> Bool
sameType x y = typeOf x == typeOf y