this pointer

[Kasya]

Hello,

I have some problems with "this" pointer:

 
CInstance::CInstance(CPrototype *backing) {
_backing = backing; //CPrototype *_backing;
this = backing->newInstance(); //CInstance * CPrototype::newInstance();
}
 
 

It gives me error when i do it: C2106: '=' : left operand must be l-value (LINE 3)

What can i do?

Thanks,
Kasya

P.S I don't want to use function like void CPrototype::newInstance(CInstance * instance);

[JosAH]

The this pointer is not a modifiable lvalue so you can't assign anything to it.

kind regards,

Jos

[arnaudk]

If you're trying to make a new Cinstance from a Cprototype, you can use the default constructor and simply

CPrototype * backing;
Cinstance * myinstance = backing->newInstance();
 

This has the same logic as your code, which would have resulted in something like

CPrototype * backing;
Cinstance * myinstance = new Cinstance(backing);
 

except that you can't assign to the this pointer.