Abstract:Haskell 2010 lacks flexibility for creating instances of type classes for type constructors with multiple type arguments. We would like to make the order of type arguments to a type constructor irrelevant to how type class instances can be specified. None of the currently available techniques in Haskell allow this satisfactorily.To solve this, we have added the concept of type-level lambdas as anonymous type synonyms to Haskell. As higher-order unification of lambda terms in general is undecidable, we take a c… Show more
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