[GHC] #13963: Runtime representation confusingly displayed

GHC ghc-devs at haskell.org
Wed Aug 16 18:29:44 UTC 2017


#13963: Runtime representation confusingly displayed
-------------------------------------+-------------------------------------
        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  TypeInType,
                                     |  LevityPolymorphism
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 goldfire):

 OK. I've fixed this. Here is the new output:

 {{{
 Pair :: TYPE rep -> TYPE rep' -> RuntimeRep -> *
 Pair Int :: * -> RuntimeRep -> *
 Pair Int Float :: RuntimeRep -> *
 Pair Int Float LiftedRep :: *
 }}}

 I'd say this is correct, because in the `Pair Int` case, we already have
 to choose the representation -- and we never regeneralize over
 `RuntimeRep` arguments.

 Patch will land with several others, in due course.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13963#comment:4>
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