Abandon NULL for (0)
D. Chadwick Gibbons
chad at csd4.csd.uwm.edu
Fri Sep 22 05:01:10 AEST 1989
In article <14718 at bfmny0.UU.NET> tneff at bfmny0.UU.NET (Tom Neff) writes:
|In article <6502 at ux.cs.man.ac.uk> ian at ux.cs.man.ac.uk (Ian Cottam) writes:
|> I propose that the integral constant expression (0) be used instead of
|> NULL.
|
|However (0) is not explicitly cast to a pointer type, as NULL may be
|presumed to be when appropriate.
So? When 0 used in a comparison with a pointer, it is automatically
promoted to an integer pointer of an appropriate type.
|declare or define, an external routine that accepts a single pointer as
|its argument, by saying myproc((0)), the compiler will Miranda it into a
|regular int, rather that ((void *) 0), which might have a different size
|and representation.
yeah, talk about assuming sizeof * = sizeof int. Nononono!
If you're really parinoid about using NULL, because your compiler may do
something like the above person is suggestion, then try this:
#define NIL (0)
simple, no?
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