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From: braner@batcomputer.tn.cornell.edu (braner)
Newsgroups: comp.lang.c,comp.lang.c++,comp.sys.atari.st
Subject: Re: Object oriented programming in C
Message-ID: <1497@batcomputer.tn.cornell.edu>
Date: Thu, 13-Nov-86 14:15:50 EST
Article-I.D.: batcompu.1497
Posted: Thu Nov 13 14:15:50 1986
Date-Received: Fri, 14-Nov-86 05:59:06 EST
Reply-To: braner@batcomputer.UUCP (braner)
Distribution: world
Organization: Theory Center, Cornell University, Ithaca NY
Lines: 25
Summary: a little bug
Xref: mnetor comp.lang.c:39 comp.lang.c++:10 comp.sys.atari.st:37

[]

A while ago I posted a method to do object oriented programming in C.
At the heart of the method is a function that is called every time a
method is being looked up.  This function, called FindMethod, returns
the address of the method - a pointer to a function.  Now how do you declare
a function of that type?  A variable of type pointer to a function which
in turn returns an int is declared as:

	int (*foo)();

and in my posting I declared FindMethod as:

	int (*FindMethod())(token,obp);

Turns out that the correct syntax is:

	int (*FindMethod(token,obp))();

What is surprising is that the compiler I used (Megamax C on the Atari ST)
did not complain, and went on to produce code that did just what I intended!
But other compilers complained.  Thanks to Don Howes that notified me of the
problem.

- Moshe Braner