Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!munnari.oz.au!bruce!damian
From: damian@bruce.cs.monash.OZ.AU (Damian Conway)
Newsgroups: comp.lang.c++
Subject: g++ bug (?)
Message-ID: <3018@bruce.cs.monash.OZ.AU>
Date: 6 Sep 90 03:27:52 GMT
Organization: Monash Uni. Computer Science, Australia
Lines: 49

We have g++ 1.37.1 running on a Sun 350.

I _thought_ that if a class has no defined operator= the default
is copy by member.

However....

	class class1 {
		int d;
	public:
		class1() {d=1;}
		friend class1& operator=(class1&,class1);
		};

	class1& operator=(class1& c1,class1 c2) {
		c1.d=c2.d;
		return c1;
		}

	class class2 {
		int d;
	public:
		class2() {d=1;}
		};

	main() {
		class2 c1,c2;
		c1 = c2;
		}

produces:

	test.c: In function int main ():
	test.c:25: bad argument 0 for function `operator = (class class1 &, class class1)' (type was class class2 )


Questions:

	Is the defect in my understanding of g++?
	Is this a known bug?
	Is there a known fix?

damian
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  who: Damian Conway                 email:..!seismo!munnari!bruce.oz!damian
where: Dept. Computer Science        phone: +61-3-565-5779
       Monash University             quote: "A pessimist is never disappointed."
       Clayton 3168
       AUSTRALIA