_>#include <iostream>

_>struct A { int a; };
_>struct B : virtual A { int b; };
_>struct C : virtual A { int c; };
_>struct D : B,C { int d; };

_>template<class T> T* get_instance() { static T t[1]; return t; }
_>template<class T,auto m> size_t offset() {
_>    T *t=get_instance<T>(); return (char*)&(t->*m)-(char*)t;
_>}

_>int main(int argc,char **argv) {
_>    std::cout<< "b:" << offset<D,&D::b>() << std::endl;
_>    std::cout<< "c:" << offset<D,&D::c>() << std::endl;
_>    std::cout<< "d:" << offset<D,&D::d>() << std::endl;
_>    std::cout<< "a:" << offset<D,&D::a>() << std::endl;
_>    return 0;
_>}
_>