[cvs-nhc98] * Re-implement IORef directly as a 1-item Vector, to elimi

[Malcolm Wallace]

malcolm: Mon Feb  4 18:46:01 CET 2002

Update of /usr/src/master/nhc/src/prelude/IOExtras
In directory hinken:/tmp/cvs-serv8590

Modified Files:
	DIORef.hs FreezeIOArray.hs IOExtras.hs NewIOArray.hs 
	NewIORef.hs ReadIOArray.hs ReadIORef.hs WriteIOArray.hs 
	WriteIORef.hs 
Log Message:
* Re-implement IORef directly as a 1-item Vector, to eliminate the
  overhead of the Ix class in a 1-item IOArray.  Should be somewhat
  faster now.
* Remove '#ifdef 0' dead code from the IOArray operations.