#4271: Cannot declare multiparameter type class with TypeOperators.
---------------------------------+------------------------------------------
Reporter: Khudyakov | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.12.3 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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This code lead to error message: "Malformed instance header"
{{{
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE MultiParamTypeClasses #-}
class f :<: g
instance () :<: ()
}}}
If instance declaration changed to code below it compiles just fine.
{{{
instance (:<:) () ()
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4271>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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