#13183: Template Haskell needlessly pretty-prints empty instance contexts -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.2.1 Component: Template Haskell | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Ah, I see that 499e43824bda967546ebf95ee33ec1f84a114a7c introduced a function called `pprHsContextAlways` which, as the name suggests, //always// prints out the context for an `HsQualTy`, even if it's empty. Is the solution here not to use `pprHsContextAlways` when printing out Template Haskell-spliced code? Or perhaps we should avoid constructing an `HsQualTy` in `hsSyn/Convert` when [http://git.haskell.org/ghc.git/blob/65cc7620517abec9b3e0d9bfe644accd5f649fe5... converting] a Template Haskell `InstanceD` into a `ClsInstDecl`? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13183#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler