Copy Constructor

// Copy constructor
Point(const Point &p1) {
	x = p1.x; y = p1.y; 
}

Compiler-Provided Copy Constructor

If we don’t provide an implementation of the copy constructor, the compiler provides a Copy Constructor that simply copies all the fields.

Another example:

class Test {
public:
    Test() {};
    Test(const Test& t) {
        cout << "Copy constructor called " << endl;
    };
    Test& operator=(const Test& t) {
        cout << "Assignment operator called " << endl;
        return *this; // to allow for chaining
    };
};

Why *this and not just this?

Because *this is a pointer. And this makes sense on why you would do this->data instead of this.data when you want to access specific member fields!

Note about this, it might be dangerous to get confused on. This is actually super important!