#2456: For higher kinds, instance declarations need quantification in the context -------------------------------------------+--------------------------- Reporter: ronwalf | Owner: Type: feature request | Status: closed Priority: normal | Milestone: ⊥ Component: Compiler | Version: 6.9 Resolution: duplicate | Keywords: Operating System: Unknown/Multiple | Architecture: x86 Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: #2893 Differential Revisions: | -------------------------------------------+--------------------------- Changes (by thomie): * status: new => closed * resolution: => duplicate * related: => #2893 Comment: Replying to [comment:7 simonpj]:

So I'll retitle this ticket as a feature request for such a feature.

Note: doing this makes it more difficult to test whether a ticket can be closed or not, because the description, attached testcases and part of the discussion are still for the original bug. Nevertheless, this feature request is covered by #2893 (Implement "Quantified contexts" proposal). Also some discussion in #5927 and #7019. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/2456#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler