Perl 6 Deep Dive

The does operator

The does operator mixes a role into an object. We will talk about mix-ins in Chapter 8, Object-Oriented Programming. Anyway, consider a brief example:

class Animal {}role Barking {    method bark() {       say "Bow-wow!";    }}my $dog = Animal.new();$dog does Barking;$dog.bark();

Here, the $dog variable is first created as an instance of the Animal class. Then, the behavior of the Barking role is attached to it. After that, the $dog variable can bark().