问C++伪函数指针等价

EN

//-- My Code --//
class A {
public:
    int myFunc() {
        return 3;
    }
};


//-- Other Code --//
namespace glm{
namespace detail
{
    template <typename T>
    GLM_FUNC_QUALIFIER typename tvec3<T>::size_type tvec3<T>::length() const
    {
        return 3;
    }

    //... Omitted
}
}

//-- Test --//
TypelessMember::Func<int> funcOverridenA = TypelessMember::func(&A::myFunc); // The original function pointer (pretending to be a member function of a "typeless" class)
auto equivalenceFunc = &glm::detail::tvec3<unsigned char>::length; // Get the false equivalence member function pointer
auto equivalence = *(TypelessMember::Func<int>*)&equivalenceFunc; // Pretend that this is a different type of function
if (equivalence == funcOverridenA) {
    puts("False function equivalence"); // This block of code is hit
    return false;
}


//-- Other test --//
A valueA = {};
TypelessMember* typelessA = typeless(&valueA);
int v = (typelessA->*funcOverridenA)(); // This calls the glm function (I guess because it was produced in the PCH first)