Metamodel::RoleContainer Reference

Metaobject that supports holding/containing roles

What it is #

Position in the hierarchy #

Routines #

Signatures are reproduced from the documentation, including their declared return types. A routine listed here is part of the type's published interface; whether Raku++ implements it is a separate question, answered by the examples below.

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 List:D.

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

Examples, run three ways #

Every example below comes from the official documentation, together with the output that documentation asserts. Each was then executed by Rakudo and by Raku++ when this page was built. Where the three agree, one result is shown; where they do not, all three are — because which of them is wrong is exactly the information worth having.

3 no-output

role Metamodel::RoleContainer {}

class A does SomeRole {}

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