How to differentiate (when overloading) between prefix and postfix forms of operator++? (C++)

Question

Becuase I've overloaded the operator++ for an iterator class

template typename list::iterator& list::iterator::operator++() { //stuff }

But when I try to do

list::iterator IT; IT++;

I get a warning about there being no postifx ++, using prefix form. How can I specifically overload the prefix/postifx forms?

Answer 1

Write a version of the same operator overload, but give it a parameter of type int. You don't have to do anything with that parameter's value.

If you're interested in some history of how this syntax was arrived out, there's a snippet of it here.

Answer 2

http://www.devx.com/tips/Tip/12515

class Date {
 //...
 public:
 Date& operator++(); //prefix
 Date& operator--(); //prefix
 Date operator++(int unused); //postfix
 Date operator--(int unused); //postfix
};

Answer 3

Postfix has an int argument in the signature.

Class& operator++();    //Prefix 
Class  operator++(int); //Postfix