Make newtype polykinded
I hate having to give up so much top type safety when I use unlifted types. It seems to me that I should be able to use newtype to create new types of kind # as well as *:
newtype MyWord# = MyWord# Word#
newtype GoodStuff# a = GoodStuff (# Int#, a #)In an ideal world, such types would be in Core (so RULES could see them), but I'd be very happy even to just have them in Haskell.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler (Type checker) |
| Test case | |
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