-- main.mcl --
func answer() {
	"the answer is 42"
}

$out1 = answer()
$out2 = answer()

test [$out1 + $out2,] {}
-- OUTPUT --
Edge: FuncValue -> call # fn
Edge: FuncValue -> call # fn
Edge: FuncValue -> call # fn
Edge: call -> composite: []str # 0
Vertex: FuncValue
Vertex: FuncValue
Vertex: FuncValue
Vertex: call
Vertex: call
Vertex: call
Vertex: composite: []str
Vertex: const: str("+")