Is it possible to write auto-cast operator outside a struct?

Question

The exact situation is next: I have defined in system API structs CGPoint and CGSize, and I want to be able to write my_point = my_size. I

Answer 1

If you can derive from or wrap CGPoint and use the new class instead throughout your code, then you can provide whatever operators you like. The new class can have a conversion operator to CGPoint facilitating interaction with existing functions.