-- main.mcl --
$st0 struct{x str} = struct{x => "hello",}
test $st0->x {}

$st1 = struct{y => "world",}
test $st1->y {}

$st2 = struct{x => true, y=> 42, z => "hello world",}
test $st2->z {}
-- OUTPUT --
Vertex: test[hello world]
Vertex: test[hello]
Vertex: test[world]