[GHC] #10227: Type checker cannot deduce type

[GHC]

#10227: Type checker cannot deduce type
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        Reporter:  augustss          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by simonpj):

 True.  Jan Stolarek's work on
 [https://ghc.haskell.org/trac/ghc/wiki/InjectiveTypeFamilies injective
 type families] is a start in that direction.

 But you want more.  Would you care to write a specification of exactly
 what you want, and an algorithm for achieving it?

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10227#comment:1>
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