[GHC] #14550: Report the provenance of TyThings

[GHC]

#14550: Report the provenance of TyThings
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        Reporter:  ezyang            |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 For `TyCon` at least we already have this: the `AlgTyConRhs` is an
 `AbstractTyCon`.  For type functions we have `FamTyConFlav` =
 `AbstractClosedSynFamilyTyCon`.  Etc.  I think this is probably the way to
 go.

 For `Id` we have `IdDetails`, which could perhaps add `AbstractVanillaId`.

 Etc.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14550#comment:1>
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