[GHC] #9687: Missing Typeable instances for built-in types

GHC ghc-devs at haskell.org
Mon Oct 13 09:00:03 UTC 2014


#9687: Missing Typeable instances for built-in types
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              Reporter:  selinger    |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.8.3
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by simonpj):

 What if you say
 {{{
 instance (Typeable a, Typeable b, Typeable c, Typeable d, Typeable e,
 Typeable f,
           Typeable g, Typeable h)
       => Typeable (a,b,c,d,e,f,g,h)
 }}}
 using standalone deriving?

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9687#comment:1>
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