15.7 Object-Oriented Programming

Perl rules of object-oriented programming:

• An object is simply a reference that happens to know which class it belongs to. Objects are blessed, references are not.

• A class is simply a package that happens to provide methods to deal with object references. If a package fails to provide a method, the base classes as listed in @ISA are searched.

• A method is simply a subroutine that expects an object reference (or a package name, for static methods) as the first argument.

Methods can be applied with:

method objref parameters        or
objref->method parameters