-- main.mcl --
import "fmt"

$map = {0 => "a", 1 => "b", 2 => "c",}

class foo($x) {
	$result = "hello " + $x
}

forkv $key, $val in $map {

	include foo($val) as included

	$s = fmt.printf("%s is %d", $included.result, $key)
	test [$s,] {}
}

-- OUTPUT --
Vertex: test[hello a is 0]
Vertex: test[hello b is 1]
Vertex: test[hello c is 2]