Haskell).
\begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module Unique (
Unique, Uniquable(..), hasKey,
#include "HsVersions.h"
import BasicTypes
-import PackageConfig
import FastString
import Outputable
-import FastTypes
import GHC.Exts
import Data.Char ( chr, ord )
mkUnique (C# c) (I# i)
= MkUnique (w2i (tag `or#` bits))
where
-#if __GLASGOW_HASKELL__ >= 503
tag = i2w (ord# c) `uncheckedShiftL#` i2w_s 24#
-#else
- tag = i2w (ord# c) `shiftL#` i2w_s 24#
-#endif
bits = i2w i `and#` (i2w 16777215#){-``0x00ffffff''-}
unpkUnique (MkUnique u)
= let
- tag = C# (chr# (w2i ((i2w u) `shiftr` (i2w_s 24#))))
+ tag = C# (chr# (w2i ((i2w u) `uncheckedShiftRL#` (i2w_s 24#))))
i = I# (w2i ((i2w u) `and#` (i2w 16777215#){-``0x00ffffff''-}))
in
(tag, i)
- where
-#if __GLASGOW_HASKELL__ >= 503
- shiftr x y = uncheckedShiftRL# x y
-#else
- shiftr x y = shiftRL# x y
-#endif
\end{code}
instance Uniquable FastString where
getUnique fs = mkUniqueGrimily (I# (uniqueOfFS fs))
-instance Uniquable PackageId where
- getUnique pid = getUnique (packageIdFS pid)
-
instance Uniquable Int where
getUnique i = mkUniqueGrimily i
\end{code}