[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
-------------------------------------+-------------------------------------
              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        |
-------------------------------------+-------------------------------------

Comment (by alanz):

 Status report

 Phab:D297 has been withdrawn, as it has been split up into

   * the changes required to the AST in Phab:D426
   * the changes for the Lexer/Parser etc in Phab:D438
   * changes to HsLit to capture the original source text in Phab:D412

 At this point Phab:D412 is set up to depend on Phab:D438 which in turn
 depends on Phab:D426

 These are all ready for review

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9628#comment:36>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler