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.