#9123: Need for higher kinded roles -------------------------------------+------------------------------------- Reporter: simonpj | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.8.2 checker) | Keywords: Roles, Resolution: | QuantifiedConstraints 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 goldfire): I had seen the bit you had hidden under the carpet, but was still stuck on the "completely false" part -- glad we agree there. :) And I'm glad that the current implementation is correct. If you're documenting this, you may wish to refresh yourself on Section 5.3.1 of the [https://repository.brynmawr.edu/cgi/viewcontent.cgi?referer=&httpsredir=1&article=1010&context=compsci_pubs JFP "Safe Coercions" paper], which goes over all this in some detail. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9123#comment:54 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler