Restricted Data Types Now
We should adopt Oleg's "Restricted Data Types Now" approach for simpler cases, like Functor, that don't involve creating new type classes.
class Functor f a b where
fmap :: (a -> b) -> f a -> f b
instance (Ord a, Ord b) => Functor Data.Set.Set a b where
...
Trac metadata
Trac field | Value |
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Version | |
Type | Task |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | HaskellPrime |
Test case | |
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