X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FBreakArray.hs;h=60d1410cd070467d751271fce4de9883d017e322;hb=c8b37bf43c61c2fc42ec6ba4ad57f631a59fc2d4;hp=788adf200c1a57f811c21fbe27360636a6027d09;hpb=cdce647711c0f46f5799b24de087622cb77e647f;p=ghc-hetmet.git

diff --git a/compiler/main/BreakArray.hs b/compiler/main/BreakArray.hs
index 788adf2..60d1410 100644
--- a/compiler/main/BreakArray.hs
+++ b/compiler/main/BreakArray.hs
@@ -1,28 +1,47 @@
+-----------------------------------------------------------------------------
 --
 -- Break Arrays in the IO monad
 -- Entries in the array are Word sized 
 --
+-- Conceptually, a zero-indexed IOArray of Bools, initially False.
+-- They're represented as Words with 0==False, 1==True.
+-- They're used to determine whether GHCI breakpoints are on or off.
+--
+-- (c) The University of Glasgow 2007
+--
+-----------------------------------------------------------------------------
+
+{-# 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 BreakArray
-  ( BreakArray (BA)
+  ( BreakArray
+#ifdef GHCI
+      (BA)  -- constructor is exported only for ByteCodeGen
+#endif
   , newBreakArray
+#ifdef GHCI
   , getBreak 
   , setBreakOn 
   , setBreakOff
   , showBreakArray
+#endif
   ) where
-
+#ifdef GHCI
 import GHC.Exts
 import GHC.IOBase
-import GHC.Prim
 import GHC.Word
 import Constants
 
 data BreakArray = BA (MutableByteArray# RealWorld)
 
 breakOff, breakOn :: Word
-breakOn  = fromIntegral 1
-breakOff = fromIntegral 0
+breakOn  = 1
+breakOff = 0
 
 -- XXX crude
 showBreakArray :: BreakArray -> IO ()
@@ -94,3 +113,14 @@ readBA# array i = IO $ \s ->
 
 readBreakArray :: BreakArray -> Int -> IO Word 
 readBreakArray (BA array) (I# i) = readBA# array i
+
+#else /* GHCI */
+--stub implementation to make main/, etc., code happier.
+--IOArray and IOUArray are increasingly non-portable,
+--still don't have quite the same interface, and (for GHCI)
+--presumably have a different representation.
+data BreakArray = Unspecified
+newBreakArray :: Int -> IO BreakArray
+newBreakArray _ = return Unspecified
+#endif /* GHCI */
+