Overloading Overview

In overloading, you redefine the effect of the standard Perl operators like + and . to have a special meaning for objects in a certain class.
Operator applications are transformed into method calls.
Syntax:

        package MyClass;
        use overload '+' => \&myadd, 
                     '-' => \&mysubtract,
                     ... 
                     ;

Now $obj1 - $x turns into

        $obj1->mysubtract($x);