LambdaCase should be suggested if it is used but not enabled
If I try to make a multiparameter typeclass GHC (well, GHCi here) advises me to turn on MultiParamTypeClasses
Prelude> class C a b where
...
(Use MultiParamTypeClasses to allow multi-parameter classes)
But if I try to use \case
it doesn't give me a helpful suggestion
Prelude> :t \case (_,_) -> ()
<interactive>:1:2: error: parse error on input ‘case’
Could it?
Trac metadata
Trac field | Value |
---|---|
Version | 8.2.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |