[GHC] #9527: Add Generic instances for Language.Haskell.TH

[GHC]

#9527: Add Generic instances for Language.Haskell.TH
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              Reporter:  nh2         |            Owner:  goldfire
                  Type:  feature     |           Status:  new
  request                            |        Milestone:  7.10.1
              Priority:  normal      |          Version:  7.8.3
             Component:  Core        |         Keywords:
  Libraries                          |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Moderate (less
      Operating System:              |  than a day)
  Unknown/Multiple                   |       Blocked By:  9526
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by luite):

 While you're at it, could you check if adding `Binary` instances is still
 problematic? The binary package is not a dependency at the moment. There's
 a comment in the code about switching to `Binary` (from `Data`) for
 serialization for annotations:

 http://git.haskell.org/packages/template-
 haskell.git/blob/9bcc122819a6f4a2ae7ad569717324b8368e801c:/Language/Haskell/TH/Syntax.hs#l661

 Serialization of the other data types is useful for out-of-process TH
 currently used by GHCJS, possibly in the future for cross compilation
 (someone started porting the GHCJS code to GHC but appears to have stopped
 working on it, I hope i have time to pick this up soon)

 Using the default `Binary` instance based on the `GHC.Generics` is ok for
 this purpose and works for almost all types. Here is my list of orphan
 instances:

 https://github.com/ghcjs/ghcjs-
 prim/blob/915f263c06b7f4a246c6e02ecdf2b9a0550ed967/GHCJS/Prim/TH/Types.hs#L113-L166

 `NameFlavour` requires a handwritten instance because of an `Int#` field.
 Can this be changed to a strict `Int` field?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9527#comment:3>
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