class Absolute is Int {};
class Relative is Int {};

multi sub a(Absolute $x) {
    say "Absolute";
}

multi sub a(Relative $x) {
    say "Relative";
}

a(Absolute.new());
a(Relative.new());

my Absolute $x = 3;  #doesnt work
my Relative $x = 3;  #doesnt work
my Absolute $x .= new(3);  #doesnt work
my Relative $x .= new(3);  #doesnt work