getUnique, getUniques, -- basic ops
- UniqSM(..), -- type: unique supply monad
- initUs, thenUs, returnUs,
+ SYN_IE(UniqSM), -- type: unique supply monad
+ initUs, thenUs, returnUs, fixUs,
mapUs, mapAndUnzipUs, mapAndUnzip3Us,
thenMaybeUs, mapAccumLUs,
splitUniqSupply
) where
-import Ubiq{-uitous-}
+IMP_Ubiq(){-uitous-}
import Unique
import Util
import PreludeGlaST
+#if __GLASGOW_HASKELL__ >= 200
+# define WHASH GHCbase.W#
+#else
+# define WHASH W#
+#endif
+
w2i x = word2Int# x
i2w x = int2Word# x
i2w_s x = (x :: Int#)
\end{code}
\begin{code}
-mkSplitUniqSupply (MkChar c#)
+mkSplitUniqSupply (C# c#)
= let
mask# = (i2w (ord# c#)) `shiftL#` (i2w_s 24#)
returnPrimIO (MkSplitUniqSupply uniq s1 s2)
)
where
+--
-- inlined copy of unsafeInterleavePrimIO;
-- this is the single-most-hammered bit of code
-- in the compiler....
+ -- Too bad it's not 1.3-portable...
unsafe_interleave m s
= let
(r, new_s) = m s
in
(r, s)
+--
- mk_unique = _ccall_ genSymZh `thenPrimIO` \ (W# u#) ->
- returnPrimIO (MkInt (w2i (mask# `or#` u#)))
+ mk_unique = _ccall_ genSymZh `thenPrimIO` \ (WHASH u#) ->
+ returnPrimIO (I# (w2i (mask# `or#` u#)))
in
+#if __GLASGOW_HASKELL__ >= 200
+ primIOToIO mk_supply# >>= \ s ->
+ return s
+#else
mk_supply# `thenPrimIO` \ s ->
return s
+#endif
splitUniqSupply (MkSplitUniqSupply _ s1 s2) = (s1, s2)
\end{code}
\begin{code}
-getUnique (MkSplitUniqSupply (MkInt n) _ _) = mkUniqueGrimily n
+getUnique (MkSplitUniqSupply (I# n) _ _) = mkUniqueGrimily n
-getUniques i@(MkInt i#) supply = i# `get_from` supply
+getUniques (I# i) supply = i `get_from` supply
where
get_from 0# _ = []
- get_from n# (MkSplitUniqSupply (MkInt u#) _ s2)
- = mkUniqueGrimily u# : get_from (n# `minusInt#` 1#) s2
+ get_from n (MkSplitUniqSupply (I# u) _ s2)
+ = mkUniqueGrimily u : get_from (n `minusInt#` 1#) s2
\end{code}
%************************************************************************
-- the initUs function also returns the final UniqSupply
-initUs :: UniqSupply -> UniqSM a -> (UniqSupply, a)
+initUs :: UniqSupply -> UniqSM a -> a
-initUs init_us m
- = case (splitUniqSupply init_us) of { (s1, s2) ->
- (s2, m s1) }
+initUs init_us m = m init_us
{-# INLINE thenUs #-}
{-# INLINE returnUs #-}
@thenUs@ is where we split the @UniqSupply@.
\begin{code}
+fixUs :: (a -> UniqSM a) -> UniqSM a
+fixUs m us
+ = r where r = m r us
+
thenUs :: UniqSM a -> (a -> UniqSM b) -> UniqSM b
thenUs expr cont us