[GHC] #9703: Add missing calling conventions to Template Haskell

[GHC]

#9703: Add missing calling conventions to Template Haskell
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              Reporter:  luite       |            Owner:  ekmett
                  Type:  feature     |           Status:  patch
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.9
             Component:  Core        |         Keywords:
  Libraries                          |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Easy (less than 1
      Operating System:              |  hour)
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:  D353        |
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Comment (by luite):

 Replying to [comment:2 mtolly]:
 > Just reported this a bit ago :)
 https://ghc.haskell.org/trac/ghc/ticket/9694

 Ah sorry, I missed that one. There is a workaround in GHCJS that lets you
 output javascript imports by encoding them with a special name, see
 https://github.com/ghcjs/ghcjs-
 ffiqq/blob/75c7ee1b09c019c897a30d87713d023e8e1fc43f/src/GHCJS/Foreign/QQ.hs#L100
 . GHCJS picks this up in the desugarer and replaces it with a `javascript`
 import. This will probably be removed when `template-haskell` supports the
 calling convention directly.

 I'm not sure if a `String` field is all that useful, since it'd have to be
 possible to convert it between the TH and GHC representation. Converting
 might still be possible with `Read`/`Show` or similar, but that doesn't
 sound very attractive to me. I'd say it's better to keep the current
 approach until there's a real need for a flexible `String` constructor,
 like a non-GHC compiler supporting TH with very different calling
 conventions.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9703#comment:4>
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