allow build settings to be overriden by adding mk/validate.mk

[ghc-hetmet.git] / compiler / basicTypes / UniqSupply.lhs

diff --git a/compiler/basicTypes/UniqSupply.lhs b/compiler/basicTypes/UniqSupply.lhs
index 710fc03..8dcf595 100644 (file)
--- a/compiler/basicTypes/UniqSupply.lhs
+++ b/compiler/basicTypes/UniqSupply.lhs
@@ -18,7 +18,7 @@ module UniqSupply (
        lazyThenUs, lazyMapUs,
 
        mkSplitUniqSupply,
-       splitUniqSupply
+       splitUniqSupply, listSplitUniqSupply
   ) where
 
 #include "HsVersions.h"
@@ -56,6 +56,7 @@ data UniqSupply
 mkSplitUniqSupply :: Char -> IO UniqSupply
 
 splitUniqSupply :: UniqSupply -> (UniqSupply, UniqSupply)
+listSplitUniqSupply :: UniqSupply -> [UniqSupply]   -- Infinite
 uniqFromSupply  :: UniqSupply -> Unique
 uniqsFromSupply :: UniqSupply -> [Unique]      -- Infinite
 \end{code}
@@ -63,11 +64,7 @@ uniqsFromSupply :: UniqSupply -> [Unique]    -- Infinite
 \begin{code}
 mkSplitUniqSupply (C# c#)
   = let
-#if __GLASGOW_HASKELL__ >= 503
        mask# = (i2w (ord# c#)) `uncheckedShiftL#` (i2w_s 24#)
-#else
-       mask# = (i2w (ord# c#)) `shiftL#` (i2w_s 24#)
-#endif
        -- here comes THE MAGIC:
 
        -- This is one of the most hammered bits in the whole compiler
@@ -84,6 +81,7 @@ mkSplitUniqSupply (C# c#)
 foreign import ccall unsafe "genSymZh" genSymZh :: IO Int
 
 splitUniqSupply (MkSplitUniqSupply _ s1 s2) = (s1, s2)
+listSplitUniqSupply  (MkSplitUniqSupply _ s1 s2) = s1 : listSplitUniqSupply s2
 \end{code}
 
 \begin{code}