[GHC] #13009: Hierarchical Module Structure for GHC

[GHC]

#13009: Hierarchical Module Structure for GHC
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        Reporter:  hsyl20            |                Owner:  hsyl20
            Type:  task              |               Status:  patch
        Priority:  low               |            Milestone:
       Component:  GHC API           |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3647
       Wiki Page:                    |
  ModuleDependencies/Hierarchical    |
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Comment (by hsyl20):

 The proposal: https://github.com/ghc-proposals/ghc-proposals/pull/57

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13009#comment:18>
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