Advanced C++ Topics

Operator Overloading

Some operators must access the internals of the class and must be member functions.
Member functions use the implicit parameter as the left operand.

A non member operator:

bool operator==(Iterator a, Iterator b)

The same operator as a member function:

bool Iterator::operator==(Iterator b) const

If the operator is unary, then the member function has no explicit parameter
```
string Iterator::operator*() const
```