[GHC] #7021: Tuple (and other exotic predicates) not yet handled in Template Haskell

[GHC]

#7021: Tuple (and other exotic predicates) not yet handled in Template Haskell
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        Reporter:        |            Owner:
  goldfire               |           Status:  new
            Type:        |        Milestone:  7.8.1
  feature request        |          Version:  7.5
        Priority:        |         Keywords:  ConstraintKinds
  normal                 |  TemplateHaskell
       Component:        |     Architecture:  Unknown/Multiple
  Template Haskell       |       Difficulty:  Unknown
      Resolution:        |       Blocked By:
Operating System:        |  Related Tickets:
  Unknown/Multiple       |
 Type of failure:        |
  None/Unknown           |
       Test Case:        |
        Blocking:        |
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Comment (by goldfire):

 Do you have patches posted somewhere? And I'm surprised that you didn't
 have to modify `compiler/deSugar/DsMeta.lhs` to get this working -- that
 file handles translation of TH quotes, which should support the new kinds
 of predicates. Where is your test case? Have you run the testsuite?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7021#comment:7>
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