[GHC] #15471: Polymorphism, typed splices and type inference don't mix

[GHC]

#15471: Polymorphism, typed splices and type inference don't mix
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        Reporter:  mpickering        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Template Haskell  |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mpickering):

 Metaocaml also does the right thing here for what it's worth.

 {{{
 # let id x = x;;
 val id : 'a -> 'a = <fun>
 # let t = .< id >.;;
 val t : ('a -> 'a) code = .<(* CSP id *)>.
 # let v = (!. t) 5;;
 val v : int = 5
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15471#comment:7>
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