[GHC] #3355: Refactor Template Haskell syntax conversions

[GHC]

#3355: Refactor Template Haskell syntax conversions
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    Reporter:  simonmar          |        Owner:                  
        Type:  task              |       Status:  new             
    Priority:  normal            |    Milestone:  6.12 branch     
   Component:  Compiler          |      Version:  6.10.3          
    Severity:  normal            |   Resolution:                  
    Keywords:                    |   Difficulty:  Moderate (1 day)
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Comment (by simonmar):

 Attached code from Haddock to convert !TyThing to !HsSyn (transformation
 "A" in [wiki:Commentary/Compiler/TemplateHaskell]).

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3355#comment:1>
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