role Metamodel::RoleContainer

Metaobject that supports holding/containing roles
role Metamodel::RoleContainer {}

Warning: this role is part of the Rakudo implementation, and is not a part of the language specification.

Implements the ability to hold roles to be held for composition.

class A does SomeRole {}

roughly corresponds to

class A {
    BEGIN A.^add_role(SomeRole);
}

Methods

method add_role

method add_role($obj, Mu $role)

Adds the $role to the list of roles to be composed.

method roles_to_compose

method roles_to_compose($obj --> List:D)

returns a list of roles added with add_role, which are to be composed at type composition time.

See Also

role Metamodel::AttributeContainer

Metaobject that can hold attributes

role Metamodel::C3MRO

Metaobject that supports the C3 method resolution order

role Metamodel::Documenting

Metarole for documenting types.

role Metamodel::Finalization

Metaobject supporting object finalization

role Metamodel::MethodContainer

Metaobject that supports storing and introspecting methods

role Metamodel::Mixins

Metaobject for generating mixins

role Metamodel::MROBasedMethodDispatch

Metaobject that supports resolving inherited methods

role Metamodel::MultipleInheritance

Metaobject that supports multiple inheritance

role Metamodel::Naming

Metaobject that supports named types

role Metamodel::ParametricRoleGroupHOW

Represents a group of roles with different parameterizations

role Metamodel::ParametricRoleHOW

Represents a non-instantiated, parameterized, role.

role Metamodel::PrivateMethodContainer

Metaobject that supports private methods

role Metamodel::RolePunning

Metaobject that supports punning of roles.

role Metamodel::Stashing

Metarole for type stashes

role Metamodel::Trusting

Metaobject that supports trust relations between types

role Metamodel::Versioning

Metaobjects that support versioning

The Camelia image is copyright 2009 by Larry Wall. "Raku" is trademark of the Yet Another Society. All rights reserved.