g++ compiler problem - virtual fns with derived class args - Thread - go-pugleaf

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1 total messages Started by Tim Day Fri, 24 Feb 1989 13:21

g++ compiler problem - virtual fns with derived class args

#1707

Author: Tim Day
Date: Fri, 24 Feb 1989 13:21

44 lines
1338 bytes

Here's a good 'un.... It compiles OK under Glockenspiel C++, but under
g++ (g++ version 1.32.0) I get :

vtest.cc:17: conficting specification deriving from virtual
  function `void One::scooby (struct Foo &)'
vtest.cc:27: warning: excess elements in aggregate initializer
--------------------------------------------------------------
class Foo
{
public:
	Foo()	{}
};

class Bar : public Foo
{
public:
	Bar()	:(){}
};

class One
{
public:
	One()				{}
	virtual void scooby(Foo&)	{}		// Here
	virtual void scooby(Bar&)	{}
};

class Two : public One
{
public:
	Two()				:(){}
	virtual void scooby(Foo&)	{}
	virtual void scooby(Bar&)	{}
};							// and here

main()
{	One a;Two b;
	a.scooby(Foo());a.scooby(Bar());b.scooby(Bar());b.scooby(Foo());
	exit(0);
}
-----------------------------------------------------------------
The problem goes away if class Bar is NOT derived from class Foo.

Tim

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