[GHC] #9242: Implement {-# OVERLAPPABLE #-} and {-# INCOHERENT #-} pragmas

[GHC]

#9242: Implement {-# OVERLAPPABLE #-} and {-# INCOHERENT #-} pragmas
-------------------------------------+-------------------------------------
              Reporter:  simonpj     |            Owner:  diatchki
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.8.2
             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:              |
-------------------------------------+-------------------------------------

Comment (by carter):

 I'd be willing to do the leg work for augmenting the pragma parser, since
 I need to get familiar with the pragma parser anyways for some of my own
 work. (if of course, that would enable a desired design choice, if not
 that don't mind me)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9242#comment:34>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler