[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:  7.6.1           
 Component:  Compiler          |        Version:  7.1             
Resolution:                    |       Keywords:                  
        Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown      |     Difficulty:  Unknown         
  Testcase:                    |      Blockedby:                  
  Blocking:                    |        Related:                  
-------------------------------+--------------------------------------------
Changes (by simonpj):

  * owner:  igloo =>
  * difficulty:  => Unknown
  * status:  patch => new
  * priority:  high => normal


Comment:

 Although we have a concrete proposal here for multi-clause lambdas and
 lambda-case, and a patch, we just aren't yet convinced enough that the
 (modest) increase in language complexity is justified by the (modest)
 benefits.  Especially as some common idioms using lambda no longer work
 with the change.  This isn't a definite "no", but we'll downgrade the
 priority until we can find a better solution.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4359#comment:59>
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