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
