test(args...)
  test-args args
  for arg in args
    foo arg

size(a, b)
  return a b

body
  test 1 2 3
  test (1 2) (3 4) 5
  test size(1, 2) size(3, 4)

body
  sizes = size(1, 2) size(3, 4)
  for size in sizes
    foo size

body
  for n in 1..5
    foo n

body
  for n in 1 2 3
    foo n

body
  for n in 1 2 3
    foo
      bar n

test(args...)
  foo
    for arg in args
      bar
        baz arg

body
  test 1 2 3

body
  for val, index in foo bar baz
    foo index val