Function type synonym fails in pattern synonym
pattern Id :: a -> a
pattern Id x = x
works but
-- • Pattern synonym ‘Id’ has one argument
-- but its type signature has none
-- • In the declaration for pattern synonym ‘Id’
type Endo a = a -> a
pattern Id :: Endo a
pattern Id x = x
Trac metadata
Trac field | Value |
---|---|
Version | 8.0.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |