Class::c3 is a perl pragma that modifies the standard method resolution order from depth-first left-to-right to the more sophisticated c3 method resolution order.

the c3 algorithm aims to provide a sane method resolution order with multiple inheritance. it was first introduced in the dylan language, later adopted for python 2.3. it is also the canonical mro implementation for perl 6 classes and is the default for parrot objects as well.