Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!husc6!ogccse!schaefer
From: schaefer@ogccse.ogc.edu (Barton E. Schaefer)
Newsgroups: comp.lang.c
Subject: Re: mutual reference in structures
Message-ID: <2572@ogccse.ogc.edu>
Date: 5 May 89 16:21:15 GMT
References: <6712@medusa.cs.purdue.edu> <23608@shemp.CS.UCLA.EDU>
Reply-To: schaefer@ogccse.UUCP (Barton E. Schaefer)
Organization: Oregon Graduate Center, Beaverton, OR
Lines: 35

In article <23608@shemp.CS.UCLA.EDU> heather@cs.ucla.edu (Heather Burris) writes:
} In article <6712@medusa.cs.purdue.edu> bouma@cs.purdue.EDU (William J. Bouma) writes:
} >Please tell me how to get C to accept the following or equivalent code:
} >
} >typedef union a {
} >    b_ *pb;
} >} a_;
} >
} >typedef struct b {
} >    a_ va;
} >} b_;
} 
} You cannot do forward references on typedefs.  You can, however,
} on structure tags.

Both DYNIX cc and gcc -ansi -pedantic accept the following without complaint:

/* --------------- */
typedef struct b b_;

typedef struct a {
	b_ *bp;
} a_;

struct b {
	a_ *ap;
};
/* --------------- */

Is there something I'm missing here?
-- 
Bart Schaefer       "And if you believe that, you'll believe anything."
							-- DangerMouse
CSNET / Internet                schaefer@cse.ogc.edu
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