class Metamodel::ParametricRoleHOW
    does Metamodel::Naming
    does Metamodel::Documenting
    does Metamodel::Versioning
    does Metamodel::MethodContainer
    does Metamodel::PrivateMethodContainer
    does Metamodel::MultiMethodContainer
    does Metamodel::AttributeContainer
    does Metamodel::RoleContainer
    does Metamodel::MultipleInheritance
    does Metamodel::Stashing
    does Metamodel::TypePretense
    does Metamodel::RolePunning
    does Metamodel::ArrayType {}

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

A Metamodel::ParametricRoleHOW represents a non-instantiated, possibly parameterized, role:

(role Zape[::T] {}).HOW.say;# OUTPUT: «Perl6::Metamodel::ParametricRoleHOW.new␤»
(role Zape {}).HOW.say; # OUTPUT: «Perl6::Metamodel::ParametricRoleHOW.new␤»

As usual, .new_type will create a new object of this class.

my \zipi := Metamodel::ParametricRoleHOW.new_type( name => "zape", group => "Zape");
say zipi.HOW; # OUTPUT: «Perl6::Metamodel::ParametricRoleHOW.new␤»

The extra group argument will need to be used to integrate it in a parametric role group, which will need to be defined in advance.

Roles pretend to be of types Mu, Any, and Cool, and delegate methods to Any.

Note: As with most of the Metamodel classes, this one is mainly for illustration purposes and is not intended for the end user to instantiate.