Did u follow the Perl6 parameter role link in the article? This provides a nice example which may help.... role Greet[Str $greeting] { method greet()

Did u follow the Perl6 parameter role link in the article? This provides a nice example which may help.... role Greet[Str $greeting] { method greet() { say $greeting } } class EnglishMan does Greet["Hello"] { } class Slovak does Greet["Ahoj"] { } class Lolcat does Greet["OH HAI"] { } EnglishMan.new.greet(); # Hello Slovak.new.greet(); # Ahoj Lolcat.new.greet(); # OH HAI http://rakudo.org/2009/01/parametric-roles.html http://rakudo.org/2009/01/parametric-roles.html