Re: [Boost-users] [Memory] Problems when calling virtual class function

Subject: Re: [Boost-users] [Memory] Problems when calling virtual class function
From: Janez Urevc (janez_at_[hidden])
Date: 2010-07-11 15:36:40

On 11 July 2010 21:28, Marshall Clow <mclow.lists_at_[hidden]> wrote:
>
> On Jul 11, 2010, at 12:17 PM, Janez Urevc wrote:
>
> > Hello,
> >
> > I am doing a research about Monte Carlo Tree Search efficiency on KBNK chess
> > ending. I use framework and algorithm implementation in C++.  Since I had some
> > memory leaks, that I couldn't manage to identify, I decided to try
> > Boost's shared_ptr.
> > I reorganized the whole thing to use it, but I encountered a problem,
> > which I cannot
> > solve.
> >
> > The problem occurs, when I try to call class member function, which
> > was declared
> > "virtual" in super class. If I try to call functions, that are not
> > redefined, everything
> > works as expected. Ex.:
> >
> > class Base{
> >    public:
> >        int val = 0;
> >        virtual void fun(){ /* do something */}
> > };
> >
> > class Derived : public Base{
> >    public:
> >        void fun(){ /*redefined*/}
> >        void fun1(){ /*not redefined*/}
> > };
>
> If you declare "fun" as virtual in the base class, it needs to be virtual in the derived class, too.
> Many compilers will warn you about this.
>
> -- Marshall

Unfortunately does not fix my problem. I will fix it anyway, of course. :)

JAnez