Cannot convert 'this' pointer from 'const Line' to 'Line &' explanation?

Question

This method:

bool Point::Intersects(const Line& line) const {
    return (line.ContainsPoint(*this, false));
}

causes this error: cannot co

Answer 1

In this case you are calling a non-const method on a const reference which isn't allowed. You have two options:

1. Do what you did and const_cast
2. Make ContainsPoint a const method