[GHC] #14581: coerce String type in annotations with OverloadedStrings enabled

GHC ghc-devs at haskell.org
Thu Dec 14 13:03:00 UTC 2017


#14581: coerce String type in annotations with OverloadedStrings enabled
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        Reporter:  mgmeier           |                Owner:  (none)
            Type:  feature request   |               Status:  closed
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:  invalid           |             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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Changes (by RyanGlScott):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 Replying to [comment:1 mgmeier]:
 > Addendum: or is the general idea of annotations that you should be able
 to annotate some definition with ''any'' Haskell value?

 Yes.
 [https://downloads.haskell.org/~ghc/8.2.2/docs/html/users_guide/extending_ghc.html?highlight=ann
 #annotating-values Per the users' guide:]

 > Any expression that has both `Typeable` and `Data` instances may be
 attached to a top-level value binding using an `ANN` pragma.

 Thus both `String` and `Text` could be used in an `ANN` pragma, so you'd
 need to resolve the ambiguity yourself.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14581#comment:2>
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