Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!tut.cis.ohio-state.edu!attctc!bobc
From: bobc@attctc.Dallas.TX.US (Bob Calbridge)
Newsgroups: comp.lang.c
Subject: self contained pointers to structures
Keywords: strange interaction
Message-ID: <10350@attctc.Dallas.TX.US>
Date: 27 Nov 89 04:01:09 GMT
Distribution: na
Organization: The Unix(R) Connection, Dallas, Texas
Lines: 29

Here's one that confounded me.  I wanted to link a number of records of the
same type.  Each record would have the same structure and would contain a
pointer to the next record.  I tried to implement it like this:

struct event {
	int	timing:
	int	count;
	struct	event *next;
};

Of course, the compiler complains because the definition of the structure is
incomplete at that point.  From a practical point of view this shouldn't matter since the space into which the record will go be allocated memory.  Does this
mean that I can define the pointer 'next' as char * and then do some coercion
in my code. I won't be using these structures in an array so all I feel
I really need is some pointer into memory.  

Or should I define a similar structure and reference a pointer to it?  This
does present the problem of what the struct * would have to be in that
definition.

I suspect that this subject has been discussed before but it didn't have my
attention at the time.

bobc@attctc
-- 
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=             I know it's petty..........                                     =
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