CChar is Num so NUL can be written as 0.
% -----------------------------------------------------------------------------
-% $Id: PrelCString.lhs,v 1.1 2001/01/11 17:25:57 simonmar Exp $
+% $Id: PrelCString.lhs,v 1.2 2001/01/11 19:48:28 qrczak Exp $
%
% (c) The FFI task force, 2000
%
-- C's end of string character
--
nUL :: CChar
-nUL = castCharToCChar '\0'
+nUL = 0
-- pair a C string with the length of the given Haskell string
--