#15181: Levity Polymorphic type signatures in GHC.Prim -------------------------------------+------------------------------------- Reporter: andrewthad | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 Resolution: duplicate | Keywords: | LevityPolymorphism Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11786 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: new => closed * resolution: => duplicate * related: => #11786 Comment: Indeed. Note that the correct type signatures are actually displayed with `:info`: {{{ λ> :info raise# raise# :: forall b (q :: GHC.Types.RuntimeRep) (a :: TYPE q). b -> a -- Defined in ‘GHC.Prim’ λ> :info unsafeCoerce# unsafeCoerce# :: forall (k0 :: GHC.Types.RuntimeRep) (k1 :: GHC.Types.RuntimeRep) (a :: TYPE k0) (b :: TYPE k1). a -> b -- Defined in ‘GHC.Prim’ λ> :info mkWeak# mkWeak# :: forall (q :: GHC.Types.RuntimeRep) (a :: TYPE q) b c. a -> b -> (State# RealWorld -> (# State# RealWorld, c #)) -> State# RealWorld -> (# State# RealWorld, Weak# b #) -- Defined in ‘GHC.Prim’ }}} However, `:type` does not show the same thing with `-fprint-explicit- runtime-reps` enabled. In short, this is a pretty-printing issue with `:type`, the subject of #11786. I'll close this ticket in favor of that one. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15181#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler