[GHC] #4359: Implement lambda-case/lambda-if

[GHC]

#4359: Implement lambda-case/lambda-if
---------------------------------+------------------------------------------
    Reporter:  batterseapower    |        Owner:              
        Type:  feature request   |       Status:  new         
    Priority:  normal            |    Milestone:              
   Component:  Compiler          |      Version:  7.1         
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Comment(by igloo):

 The motivating examples seem to be of the form
 {{{
 getArgs >>= case of
             [] -> error "No args"
             fs -> doit fs
 }}}
 so I wonder if a better extension would be:
 {{{
 mcase getArgs of
 [] -> error "No args"
 fs -> doit fs
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4359#comment:1>
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