minStack @!.pl

#todo how to use multi?
class Minstack {

    has @!stack;
    has @!min;
    

    method mpush($item) {
	push @.stack, $item;  
	if @.min==0 or @.min[*-1] > $item {
	    push @.min, $item;
	}
    }

    method mpop() {	
	my $item=pop @.stack;
	if $item == @.min[*-1] {
	    pop @.min;
	}
	return $item;
    }

    method mmin() {
	@.min[*-1];
    }

}



my $min=Minstack.new;
$min.mpush(5);
$min.mpush(3);
$min.mpush(10);
say $min.stack; 
say $min.min; 
say $min.mmin();
say $min.mpop();
say $min.mmin();


=begin comment

No such method 'stack' for invocant of type 'Minstack'
  in method mpush at Minstack02.pl:9
  in block <anon> at Minstack02.pl:32

=end comment