Moose

Moose is an extension of the object system of the Perl programming language. Its stated purpose is to bring modern object-oriented language features to Perl 5, and to make object-oriented Perl programming more consistent and less tedious. Features Moose is built on top of Class::MOP, a metaobject protocol ( MOP). Using the MOP, Moose provides complete introspection for all Moose-using classes. Classes Moose allows a programmer to create classes: A class has zero or more attributes. A class has zero or more methods. A class has zero or more superclasses (a.k.a. parent classes). A class inherits from its superclass(es). Moose supports multiple inheritance. A class has zero or more method modifiers. These modifiers can apply to its own methods, methods that are inherited from its ancestors or methods that are provided by roles. A class does zero or more roles (also known as traits in other programming languages). A class has a constructor and a destructor. A class has a metaclass. Attributes An attribute is a property of the class that defines it. An attribute always has a name, and it may have a number of other defining characteristics. An attribute's characteristics may include a read/write flag, a type, accessor method names, delegations, a default value and lazy initialization.