#9178: improve orphan instance warning ------------------------------------+------------------------------------- Reporter: fphh | Owner: Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- The current warning `Warning: orphan instance: instance ClassName TypeName` could be improved by suggesting three solutions: (i) Move the instance declaration to the file, where the class has been declared (ii) Move the instance declaration to the file, where the Type has been declared (iii) Wrap the type with a newtype and declare the instance on the new type. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9178 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler