-- main.mcl --
$x = "i am x"	# i am top-level

class c2() {
	#$y = "i am y"
	$z = "i am y and " + $x

	$newx = $x + " and hello"
}

include c2 as f1

test "${f1.z}" {}
test "${f1.x}" {}	# tricky
test "${f1.newx}" {}

-- OUTPUT --
Vertex: test[i am x]
Vertex: test[i am x and hello]
Vertex: test[i am y and i am x]