[GHC] #1274: Add a MonadState instance for the Parsec monad

[GHC]

#1274: Add a MonadState instance for the Parsec monad
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    Reporter:  mux                |        Owner:             
        Type:  proposal           |       Status:  new        
    Priority:  normal             |    Milestone:  Not GHC    
   Component:  libraries (other)  |      Version:  6.6        
    Severity:  minor              |   Resolution:             
    Keywords:                     |   Difficulty:  Easy (1 hr)
          Os:  Unknown            |     Testcase:             
Architecture:  Unknown            |  
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Comment (by dfranke):

 Actually there's a significant drawback to depending on MTL: it depends on
 multi-parameter typeclasses, whereas Parsec is currently portable.

 I vote for accepting the patch anyway, though.  Until such time as a
 Haskell compiler other than GHC  becomes suitable for developing
 production code, I'll have trouble accepting h98-compliance as a
 justification for omitting what is otherwise a worthwhile feature.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1274>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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