#13795: :kind! is not expanding type synonyms anymore -------------------------------------+------------------------------------- Reporter: Hjulle | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 8.0.2 Resolution: | Keywords: newcomer 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 simonpj): We could offer some way to get * No processing of the type (currently `:kind`) * Type families evaluated (currently `:kind!`) * Type families evaluated and type synonyms expanded (`:kind!!` perhaps?) And, I suppose, the fourth possibility (expand type synonyms but do not evaluate type families). But that's probably over-complicated -- few users would care. If we are going to have only two possibilities (`:k` and `:k!`), what the user manual says makes most sense: `:kind!` evaluates everything, type families, type synonyms and all. I suppose we could have a `:set -XNoExpandSynonymsOnBang` flag or something. Implementation is easy. The hard thing to know is what users want. Users, speak up! -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13795#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler