program main
  enum Color
    variant Red
    variant Blue
    variant Green
  struct Pixel
    field x: i32
    field label: string
    field color: Color
  fn make_pixels(head: string) -> (array Pixel 3)
    array Pixel
      construct Pixel
        field x
          int 1
        field label
          var head
        field color
          enum-variant Color.Red
      construct Pixel
        field x
          int 2
        field label
          string "mid"
        field color
          enum-variant Color.Blue
      construct Pixel
        field x
          int 3
        field label
          string "tail"
        field color
          enum-variant Color.Green
  fn echo_pixels(pixels: (array Pixel 3)) -> (array Pixel 3)
    var pixels
  fn at(pixels: (array Pixel 3), i: i32) -> Pixel
    index
      var pixels
      var i
  fn first_label(head: string) -> string
    field-access label
      call at
        call make_pixels
          var head
        int 0
  fn last_color(head: string) -> Color
    field-access color
      index
        call echo_pixels
          call make_pixels
            var head
        int 2
  fn main() -> i32
    match
      subject
        call last_color
          string "head"
      arm Color.Green
        int 0
      arm Color.Red
        int 1
      arm Color.Blue
        int 1
  test "struct array string field access"
    binary =
      call first_label
        string "head"
      string "head"
  test "struct array nested enum field access"
    binary =
      call last_color
        string "head"
      enum-variant Color.Green
  test "struct array local param return call flow"
    binary =
      field-access x
        call at
          call echo_pixels
            call make_pixels
              string "sun"
          int 1
      int 2