constructor.p6

role Constructor[*@params] {
    method CALL-ME(::?CLASS:U: *@args where +@params) {
        %_{@params} = @args;
        self.bless: |%_;
    }
}

multi trait_mod:<is>(Mu:U $_, :contor($params)!) {
    .^add_role: Constructor[@$params];
}

class Point is contor<x y> {
    has $.x;
    has $.y;
}

say Point(1, 2);