decl test_arrays : Unit -> Unit
def test_arrays = {
  var arr1 = [1; 2; 3]
  const arr2 = []
  var arr3 = []
  const arr4 = 'a'..'z'
  const n = 100
  var @arr5 = @$Int_n

  var @arr6 = @$Int_n
  var @arr6_pointer = @arr6

  const elem1 = arr1.1
  var elem2 = arr1.1
  const ~ref1 = ~arr1.1
  var ~ref2 = ~arr1.1
  ; ~arr1.1 = 123

  ; ref1 = arr1.2 // set value
  ; ~ref1 = ~ref2 // set reference
}