Metamodel::MethodDelegation Reference

Metarole for delegating method dispatch

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 delegate_methods_to #

method delegate_methods_to($type)

Delegates methods to $type. This should be a type object, but may be any object with a find_method metamethod technically.

method delegating_methods_to #

method delegating_methods_to()

Returns the type object a metaobject is delegating methods to.

method find_method #

method find_method($obj, $name)

Looks up a method on the type object this metaobject is delegating method dispatch to.

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.

1 all-differ · 1 no-output · 1 not-runnable

role Metamodel::MethodDelegation { }

role Role { }

say Role.raku;                             # OUTPUT: «Role␤»
say Role.^pun.^parents(:all).map(*.^name); # OUTPUT: «()␤»

Role
()

Role
(Any Mu)

Role

say Role.HOW.delegating_methods_to.^name; # OUTPUT: «Any␤»