rpw3@fortune.UUCP (02/08/84)
#R:ttds:-15100:fortune:11600057:000:582 fortune!rpw3 Feb 7 20:05:00 1984 We have here the argument between 1. The "right" way -- cast the pointer as an arg 2. The "easy" way -- cast the pointer as a define may I suggest 3. The "easy/right" way -- define a NULL for each type, as in #define NULL 0 #define NULLint (int) NULL #define NULLchar (char) NULL #define NULLxyz_type (xyz_type)NULL Then val = foo(x, y, NULLchar, z); Isn't that easy to type? (**groan**) :-) Rob Warnock UUCP: {sri-unix,amd70,hpda,harpo,ihnp4,allegra}!fortune!rpw3 DDD: (415)595-8444 USPS: Fortune Systems Corp, 101 Twin Dolphins Drive, Redwood City, CA 94065
rpw3@fortune.UUCP (02/08/84)
#R:ttds:-15100:fortune:11600060:000:602 fortune!rpw3 Feb 7 20:11:00 1984 We have here the argument between 1. The "right" way -- cast the NULL pointer when used as an arg 2. The "easy" way -- cast the NULL pointer as a define may I suggest 3. The "easy/right" way -- define a NULL for each type, as in #define NULL 0 #define NULLint (int) NULL #define NULLchar (char) NULL #define NULLxyz_type (xyz_type)NULL Then val = foo(x, y, NULLchar, z); Isn't that easy to type? (**groan**) :-) Rob Warnock UUCP: {sri-unix,amd70,hpda,harpo,ihnp4,allegra}!fortune!rpw3 DDD: (415)595-8444 USPS: Fortune Systems Corp, 101 Twin Dolphins Drive, Redwood City, CA 94065
edhall%rand-unix@sri-unix.UUCP (02/10/84)
From: Ed_Hall <edhall@rand-unix> Why clutter things with #define's? It doesn't take much more typing to say: (type *)NULL where NULL is #define'd to 0. And it is about as clear as you can get. -Ed Hall edhall@rand-unix (ARPA) decvax!randvax!edhall (UUCP)