#11726: Document change in implicit quantification -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: task | Status: new Priority: high | Milestone: 8.0.1 Component: Documentation | Version: 7.10.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Simon's big wildcard refactor (1e041b7382b6aa329e4ad9625439f811e0f27232) changed the way GHC does implicit quantification. I don't see documentation for this, however. (That patch doesn't touch the manual, and there are no release notes, at least.) This report was prompted by [https://mail.haskell.org/pipermail/haskell- cafe/2016-March/123487.html this Haskell-Café post], where Tom Ellis asks why we need {{{ -data PackMap a b s t = PackMap (Applicative f => (a -> f b) -> s -> f t) +data PackMap a b s t = PackMap (forall f. Applicative f => (a -> f b) -> s -> f t) }}} to update for 8.0. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11726 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler