#test((_ => ())(1), ())
#test(((_) => ())(1), ())
#test(((x, _) => x)(1, 2), 1)
#test(((_, x) => x)(1, 2), 2)
#test(((x, _, _) => x)(1, 2, 3), 1)
#test(((_, x, _) => x)(1, 2, 3), 2)
#test(((_, _, x) => x)(1, 2, 3), 3)
#test(((x, y, _) => (x, y))(1, 2, 3), (1, 2))
#test(((_, x, y) => (x, y))(1, 2, 3), (2, 3))
#test(((x, _, y) => (x, y))(1, 2, 3), (1, 3))