[GHC] #13324: Allow PartialTypeSignatures in the instance context of a standalone deriving declaration

[GHC]

#13324: Allow PartialTypeSignatures in the instance context of a standalone
deriving declaration
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10607            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Replying to [comment:5 simonpj]:
 > Do you also, as #13415 implies, want the non-`deriving` case to work?

 Indeed, I think that if I can figure out how to make it work for
 `deriving`, I don't think inferring constraints for arbitrary instances
 would be that fundamentally different in operation.

 Granted, I don't think I'm going to knock out both at the same time. Baby
 steps and all.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13324#comment:6>
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