#7543: Constraint synonym instances -------------------------------------+------------------------------------- Reporter: monoidal | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.12.1 Component: Compiler | Version: 7.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj):

This would be easier to explain, at least, and wouldn't require much upheaval either. Actually, this is probably simpler than my idea in comment:7.

I don't think so. {{{ type C a = X a Num type X a b = b a }}} I really don't want to put enough cleverness in the renamer to expand type synonyms on the fly. Let's see how keen our users are. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7543#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler