structured_binding_custom_type_1.cpp

int main()
{
    B b(1, 'a', 'b', 'e');
    auto& [e1, e2, e3, e4] =b;
    e1 = 100;
    e2 = 'k';
    e3 = 'l';
    e4 = 'm';
    assert(100 == b.a);
    assert('k' == b.c);
    assert('l' == b.d);
    assert('m' == b.e);

    return 0;
}