Re: Get address of whole instance with multiple inheritance
On Dec 10, 3:58 pm, "dustin.fri...@googlemail.com"
<dustin.fri...@googlemail.com> wrote:
Hi,
is there any way to get a pointer to the "whole" instance after
casting to a base class.
The term you are looking for is "most derived object".
i.E.:
class Interface1 {
public:
virtual void foo() = 0;
};
class Interface2 {
public:
virtual void bar() = 0;
};
class Interface3 {
public:
virtual void baz() = 0;
};
class Impl : public Interface1, public Interface2, public Interface3 {
public:
....
};
int main(int argc, char** argv) {
Impl* impl = new Impl();
printf("impl = %p\n", impl); // impl = 0x603010
....
Interface2* if2 = impl;
printf("if2 = %p\n", if2); // if2 = 0x603018
....
}
....
What I need is:
void* ptr = some_magic(if2); // Or any other interface
and ptr should now point to impl(0x603010), not to if2(0x603018).
void* ptr = dynamic_cast<void*>(if2);
Yechezkel Mett
--
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