[GHC] #13608: Expose the type of quasiquotes

[GHC]

#13608: Expose the type of quasiquotes
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        Reporter:                    |                Owner:
  facundo.dominguez                  |  facundo.dominguez
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Template Haskell  |              Version:  8.0.1
      Resolution:                    |             Keywords:  QuasiQuotes
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  12778             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Can you fill in the details?  What does `parseExp` do?  What does the
 finaliser do?  What if the type mentions in-scope type variables
 (existentially or lambda bound)?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13608#comment:3>
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