[GHC] #1037: primRepHint:VoidRep

[GHC]

#1037: primRepHint:VoidRep
----------------------------+-----------------------------------------------
 Reporter:  igloo           |          Owner:         
     Type:  bug             |         Status:  new    
 Priority:  normal          |      Milestone:  6.8    
Component:  Compiler (FFI)  |        Version:  6.6    
 Severity:  normal          |     Resolution:         
 Keywords:                  |     Difficulty:  Unknown
 Testcase:                  |   Architecture:  Unknown
       Os:  Unknown         |  
----------------------------+-----------------------------------------------
Comment (by igloo):

 The time this sort of stuff is desirable is when you want to return
 unboxed values
 in the IO monad, as you can't have an IO Char# type.

 However, the optimiser will currently eliminate the boxing done by the
 generated import wrapper and the unboxing done in the Haskell code that
 uses the import.

 So it's not vital that this is done, but it would mean people don't have
 to rely on the optimiser always catching this sort of thing. It is only
 useful if you are writing (or generating) very low level stuff, though.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1037>
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