-
Simon Peyton Jones authored
This patch allows class C a where type T a b :: * instance C Int type T Int b = b -> b That is, T has a type index 'b' that is not one of the class variables. On the way I did a good deal of refactoring (as usual), especially in TcInstDcls.tcLocalInstDecl1, which checks for consistent instantiation of the class instance and the type instance. Less code, more expressiveness. See Note [Checking consistent instantiation]
d2d6bdae