#13773: Types are not normalized in instance declarations -------------------------------------+------------------------------------- Reporter: augustss | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by augustss): No, I don't think GHC should accept (5*2) in a function definition. But I think it should accept my instance declaration. Here are two reasons: * GHC already does some normalization of types in instance declarations as it allows me to use type synonyms. * In the case of function definitions there is a workaround (guards), but there is no such workaround for instances. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13773#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler