Existentials in newtypes
Please allow existential quantification of phantom type arguments in newtypes.
type role A nominal representational phantom -- Or inferred roles.
newtype B a b where
B :: A a b c -> B a b Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.4.3 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |