#15008: Type synonyms with hidden, determined type variables -------------------------------------+------------------------------------- Reporter: nomeata | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Research | needed Component: Compiler | Version: 8.5 Resolution: | Keywords: | QuantifiedConstraints, wipT2893 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 nomeata): Oh, but now you are using `type`, not a `class`/`instance` pair. Does the `type` work just fine? If that works (with quantified constraints), then I’d be happy, as user, to write {{{ type MyMonad m = (forall r. (MonadReader r m, Show r)) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15008#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler