Allow compatible type synonyms to be the return type of a GADT data constructor.
Please consider adding support for something like:
{-# LANGUAGE GADTs #-}
data Steps s y where
Yield :: y -> FK s y -> FK s y
Done :: Steps s y
newtype M y s a = M { unM :: (a -> FK s y) -> FK s y }
type FK s y = s -> Steps s yTrac metadata
| Trac field | Value |
|---|---|
| Version | 7.4.1 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler (Type checker) |
| Test case | |
| Differential revisions | |
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| Blocking | |
| CC | |
| Operating system | |
| Architecture |