-- main.mcl --
# This test checks that we propagate consistently and without glitches. We would
# fail with: test[-1] or test[1] or similar if we weren't consistent. It is not
# necessarily guaranteed by the function engine to work this way, but we aim to.
import "datetime"
import "fmt"

$now = datetime.now()
$zero = $now - $now

test [fmt.printf("%d", $zero),] {}
-- OUTPUT --
Vertex: test[0]