#14341: Show instance for TypeReps is a bit broken -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Core Libraries | Version: 8.2.1 Resolution: | Keywords: Typeable Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4084 Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): Actually, there's a third problem as well: type operators are not shown infix! The solution, I believe, is to add operator precedence to `TyCon`, and then to use something akin to `Show` derivation machinery in `showTypeRep`. I imagine we don't need to worry too much about showing these things ''efficiently'', at least for the foreseeable future. `SomeTypeRep` has no `Read` instance, so there's no substantial risk of anyone trying to use its `Show` instance for anything other than error messages and interactive exploration. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14341#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler