#4222: Template Haskell lets you reify supposedly-abstract data types -------------------------------------+------------------------------------- Reporter: simonpj | Owner: (none) Type: feature request | Status: new Priority: low | Milestone: Component: Template Haskell | Version: 6.12.3 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 mgsloan): IMHO being able to reify stuff like this is a feature not a bug. See, for example, the http://hackage.haskell.org/package/true-name package. One thing that comes to mind here is just making it a special variety of warning when TH references things that are not imported. This way things like the "true-name" package will still be possible, but will cause warnings that can be ignored if the user chooses to. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/4222#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler