[GHC] #9069: -XDeriveTraversable should imply -XDeriveFunctor and -XDeriveFoldable

[GHC]

#9069: -XDeriveTraversable should imply -XDeriveFunctor and -XDeriveFoldable
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        Reporter:  sjoerd_visscher   |            Owner:
            Type:  feature request   |           Status:  patch
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by simonpj):

 OK, thanks.

 You missed the flag reference summary list
 [http://www.haskell.org/ghc/docs/latest/html/users_guide/flag-
 reference.html Section 4.20.12], where flag implications should be
 summarised.  But that's not surprising since `DeriveTraversable` and
 friends aren't even listed there.

 Could you do us a favour?
  * Add the `Derive`X extensions to that table
  * Put the whole table in alphabetical order of extension name
  * Check that there are no more missing one
  * Check that all implications are listed.

 That would be a very useful service. It could be a separate patch.

 Meanwhile, Austin, please commit.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9069#comment:8>
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