#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 benl): I vote for changing the existing primops to use Word#, and don't bother supporting the existing Bool returning versions. I think we can get away with changing the existing types because it's trivial to update client code to use the new versions. You just need to add (tagToEnum# (word2Int# ...)). I vote for making the primops return Word# instead of Int#. I know that this requires an extra word2Int# conversion when using tagToEnum#, but 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#. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/6135#comment:31 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler