Re: querying for virtual method existence

From:

Ron <ron.natalie@gmail.com>

Newsgroups:

comp.lang.c++.moderated

Date:

Mon, 13 Jul 2009 11:47:08 CST

Message-ID:

<2d48d1ab-e07b-40b6-a988-b0482bbbb7d2@d4g2000vbm.googlegroups.com>

On Jul 13, 11:21 am, Nick Hounsome <nick.houns...@googlemail.com>
wrote:

On 13 July, 00:05, rabin shahav <sha...@gmail.com> wrote:

Hi All,
I've a base class and about 500 derivatives classes. No, i'm not
confusing class instances with class definitions... and don't ask how
we end up having so many classes...

There are few methods which can be eliminated from the whole hierarchy
cone if at run time the base class could "know" if a certain method
was overridden.

Bottom line - i need the code for Foo::wasBarReDefinedNew

your help is well appreciated.
Rabin.

class Foo {
public:
   virtual int bar(double, int, char ) ;
   virtual bool wasBarReDefined()const=0;
   bool wasBarReDefinedNew()const
    { // i need the code here...

return &this->bar != &Foo::bar;

}

&this->bar isn't valid.
Even if it were, & doesn't have any polymorphic behavior.

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