#10156: Unable to coerce with flipped Coercible context -------------------------------------+------------------------------------- Reporter: ekmett | Owner: Type: feature request | Status: infoneeded Priority: normal | Milestone: Component: Compiler (Type | Version: 7.10.1-rc2 checker) | Keywords: Resolution: | Architecture: Operating System: Unknown/Multiple | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by goldfire): The following module compiles with 7.10 RC2 on my machine: {{{ module T10156 where import Data.Coerce data Iso a b = Iso (a -> b) (b -> a) coerceIso :: Coercible a b => Iso a b coerceIso = Iso coerce coerce }}} This looks like what you want. Is there something I'm missing here? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10156#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler