MetaKinds - PolyKinds generalization
MetaKinds is more general then PolyKinds.
Now we could write with PolyKinds
class Foo (a :: k) where ...
It would be nice if we could also write with MetaKinds next:
class Foo (a :: (k :: *)) where ...
As we already have Rank2Types and RankNTypes,
PolyKinds ~ Rank2Types,
MetaKinds ~ RankNTypes
This will be valid:
class Foo (a :: (k :: (u :: *))) where ...
Trac metadata
Trac field | Value |
---|---|
Version | 7.6.3 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
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Blocking | |
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Architecture |