GHC rejects code that Haskell 2010 report accepts
According to The Haskell 2010 Report, the following two modules should compile. But they don't, failing with parse errors:
{-# LANGUAGE Haskell2010 #-}
module Bug where
bool = - case b of False -> 0; True -> (-1){-# LANGUAGE Haskell2010 #-}
instance Num (IO a) where
negate = id
main = - do putStrLn "hi!"Note the unary - signs.
I'm not sure whether we should complicate the parser to fix these, but we should document the compliance-failure in the manual.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |