Editing Object slicing (section)

==Example==
<syntaxhighlight lang="cpp">
struct A
{
    A(int a) : a_var(a) {}
    int a_var;
};

struct B : public A
{
    B(int a, int b) : A(a), b_var(b) {}
    int b_var;
};

B &getB()
{
    static B b(1, 2);
    return b;
}

int main()
{
    // Normal assignment by value to a
    A a(3);
    // a.a_var == 3
    a = getB();
    // a.a_var == 1, b.b_var not copied to a

    B b2(3, 4);
    // b2.a_var == 3, b2.b_var == 4
    A &a2 = b2;
    // Partial assignment by value through reference to b2
    a2 = getB();
    // b2.a_var == 1, b2.b_var == 4!

    return 0;
}
</syntaxhighlight>