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In article <1993Jan21.001622.13452@xilinx.com> lou@xilinx.com (Lou Sanchez-Chopitea) writes:
>    Is a null pointer constant (3.2.2.3) (and therefore NULL (4.1.5)) 
>assignment compatible with a pointer to function ?
>standard conforming ?
>    	#include <stddef.h>
>    	    void (*g)( void);
>    	    g = NULL;

Yes.  Null pointer constants specifically have this magic property.
3.2.2.3, 3.3.16.1, 3.3.9, and 3.3.15 all define capabilities for
null pointer constants in relation to all kinds of pointers.

In other contexts, a null pointer constant reverts to being a simple
integer constant which happens to be 0, or a constant (void *) pointer
to objects which happens to be a null pointer (depending on which kind of
expression you coded, or which way the implementation defines NULL).
Those would be different, not compatible with pointers to functions.
--
Norman Diamond                diamond@jit.dec.com
If this were the company's opinion, I wouldn't be allowed to post it.
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