-- main.mcl --
$call = func($f, $arg) {
	$f($arg)
}

$lambda = func($x) {
	func($f, $arg) {
		$f($arg)
	}(
		if $x == "nope1" {
			func($z) { "nope2" + $x }
		} else {
			func($z) { "hello" + $x }
		},
		"bye"
	)
}

$s = $lambda("world")

test [$s,] {}
-- OUTPUT --
Vertex: test[helloworld]