[GHC] #10548: Support PartialTypeSignatures in Template Haskell

[GHC]

#10548: Support PartialTypeSignatures in Template Haskell
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        Reporter:  spinda            |                   Owner:  thomasw
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Template Haskell  |                 Version:  7.10.1
      Resolution:                    |                Keywords:  newcomer
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 thomasw):

 The changes to TH itself are straightforward. However Adam is right, the
 (named) wild cards must be known before renaming starts, and TH type
 splices are run ''during'' renaming.

 Besides a small bug I'm looking into, I see no problem with supporting
 anonymous wild cards in TH type splices. Named wild cards will require
 much more work and a refactoring of how splices and wild cards interact
 during renaming.

 Does it make sense to only allow anonymous wild cards in TH type splices
 but not named wild cards?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10548#comment:6>
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