[GHC] #6135: Unboxed Booleans

GHC cvs-ghc at haskell.org
Thu Apr 11 18:17:49 CEST 2013


#6135: Unboxed Booleans
---------------------------------+------------------------------------------
    Reporter:  benl              |       Owner:  jstolarek       
        Type:  feature request   |      Status:  patch           
    Priority:  normal            |   Milestone:  7.8.1           
   Component:  Compiler          |     Version:  7.4.1           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:  #605              |  
---------------------------------+------------------------------------------

Comment(by simonmar):

 Replying to [comment:31 benl]:

 >  there is really no reason to suggest that the result of a boolean
 comparison operator might be negative! I suspect the reason tagToEnum#
 currently takes an Int# is because literals like 5# are Int#.

 There's no reason to suggest that the result of a boolean comparison might
 be 3, yet `Word#` includes that value.  I don't think `Int#` is any worse
 than `Word#` in including lots of impossible values, and furthermore
 there's a lot less friction to using `Int#` because everything else uses
 it.  Just saying.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6135#comment:37>
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