diff options
| author | David Terei <davidterei@gmail.com> | 2011-07-20 11:09:03 -0700 |
|---|---|---|
| committer | David Terei <davidterei@gmail.com> | 2011-07-20 11:26:35 -0700 |
| commit | 16514f272fb42af6e9c7674a9bd6c9dce369231f (patch) | |
| tree | e4f332b45fe65e2a7a2451be5674f887b42bf199 /testsuite/tests/codeGen/should_compile/cg005.hs | |
| parent | ebd422aed41048476aa61dd4c520d43becd78682 (diff) | |
| download | haskell-16514f272fb42af6e9c7674a9bd6c9dce369231f.tar.gz | |
Move tests from tests/ghc-regress/* to just tests/*
Diffstat (limited to 'testsuite/tests/codeGen/should_compile/cg005.hs')
| -rw-r--r-- | testsuite/tests/codeGen/should_compile/cg005.hs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/testsuite/tests/codeGen/should_compile/cg005.hs b/testsuite/tests/codeGen/should_compile/cg005.hs new file mode 100644 index 0000000000..a25ad4250a --- /dev/null +++ b/testsuite/tests/codeGen/should_compile/cg005.hs @@ -0,0 +1,20 @@ +module Bug where
+
+import Foreign hiding ( unsafePerformIO )
+import Foreign.ForeignPtr
+import Data.Char
+import System.IO.Unsafe
+
+data PackedString = PS !(ForeignPtr Word8) !Int !Int
+
+(!) :: PackedString -> Int -> Word8
+(PS x s _l) ! i
+ = unsafePerformIO $ withForeignPtr x $ \p -> peekElemOff p (s+i)
+
+w2c :: Word8 -> Char
+w2c = chr . fromIntegral
+
+indexPS :: PackedString -> Int -> Char
+indexPS theps i | i < 0 = error "Negative index in indexPS"
+ | otherwise = w2c $ theps ! i
+
|