-- main.mcl --
import "fmt"

$map1 = {0 => "a", 1 => "b", 2 => "c",}
$map2 = {0 => "x", 1 => "y", 2 => "z",}

$word = "hello"

forkv $key1, $val1 in $map1 {

	class foo($x, $y) {
		$result = "hello " + $x + $y + $val1
		$result1 = $x + $val1
	}

	forkv $key2, $val2 in $map2 {

		include foo($val1, $val2) as included

		$s = fmt.printf("%s is {%d,%d}", $included.result, $key1, $key2)
		$s1 = fmt.printf("one: %s", $included.result1)
		test [$s, $s1,] {}
	}
}

-- OUTPUT --
Vertex: test[hello axa is {0,0}]
Vertex: test[hello aya is {0,1}]
Vertex: test[hello aza is {0,2}]
Vertex: test[hello bxb is {1,0}]
Vertex: test[hello byb is {1,1}]
Vertex: test[hello bzb is {1,2}]
Vertex: test[hello cxc is {2,0}]
Vertex: test[hello cyc is {2,1}]
Vertex: test[hello czc is {2,2}]
Vertex: test[one: aa]
Vertex: test[one: bb]
Vertex: test[one: cc]