Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!pasteur!ames!lll-winken!uunet!unh!al712
From: al712@unh.UUCP (Anthony   Lapadula)
Newsgroups: comp.lang.c
Subject: Enumerated types
Message-ID: <1152@unh.UUCP>
Date: 4 May 89 01:19:42 GMT
Distribution: usa
Organization: University of New Hampshire, Durham, NH
Lines: 23

Are you allowed to 'forward reference' enumerated types?  In other
words, is this legal?

	enum a b;		/* 'enum a' is not yet defined */

Does 'b' end up as an int, or is this an error?


Also, how about this?

	char *ptr;
	enum a { b };		/* 'b' has value 0 in expressions, right? */

	if (ptr == b)		/* Same as (ptr == NULL) ? */
		foo();

(I don't have a copy of the ANSI C Draft for reference, and I
was born and bred under K&R I.)


Thanks,

Anthony Lapadula              ..uunet!unh!al712