[GHC] #14436: Teach TemplateHaskell to generate less eye-hurting names

GHC ghc-devs at haskell.org
Tue Nov 7 18:36:55 UTC 2017


#14436: Teach TemplateHaskell to generate less eye-hurting names
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       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 goldfire):

 This may be unique to `singletons`. See [https://github.com/goldfirere/th-
 desugar/blob/master/Language/Haskell/TH/Desugar/Util.hs#L46
 `newUniqueName`], which uses `newName`, `show`s it, and then uses the
 result to make ''another'' `newName`. This is necessary because these
 `newName`d entities are sometimes top-level, and GHC doesn't like two top-
 level entities to have the same `OccName`.

 I suppose this is really a workaround for an unreported GHC bug, but I
 don't think the bug is the one this ticket is really worried about.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14436#comment:1>
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