[GHC] #9628: Add Annotations to the AST to simplify source to source conversions

[GHC]

#9628: Add Annotations to the AST to simplify source to source conversions
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              Reporter:  alanz       |            Owner:  alanz
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.9
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:  D297        |
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Comment (by Austin Seipp <austin@…>):

 In [changeset:"7927658ed1dcf557c7dd78e4b9844100521391c8/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="7927658ed1dcf557c7dd78e4b9844100521391c8"
 AST changes to prepare for API annotations, for #9628

 Summary:
 AST changes to prepare for API annotations

 Add locations to parts of the AST so that API annotations can
 then be added.

 The outline of the whole process is captured here
 https://ghc.haskell.org/trac/ghc/wiki/GhcAstAnnotations

 This change updates the haddock submodule.

 Test Plan: sh ./validate

 Reviewers: austin, simonpj, Mikolaj

 Reviewed By: simonpj, Mikolaj

 Subscribers: thomie, goldfire, carter

 Differential Revision: https://phabricator.haskell.org/D426

 GHC Trac Issues: #9628
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9628#comment:40>
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