class Item {
  n: Int
}

fn size(it: Item) -> Int {
  return it.n
}

class Bag {
  items: multi Item

  fn tidy(take spare: Item, flag: Bool) {
    let extra = Item { n: 2 }
    if flag {
      let inner = Item { n: 3 }
      spare = inner
    }
    while flag {
      let tick = Item { n: 4 }
    }
    for it in self.items {
      let seen = Item { n: 5 }
    }
  }
}

fn pick(take a: Item, take b: Item, flag: Bool) -> Int {
  let total = 0
  if flag {
    let tmp = Item { n: 1 }
    total = total + size(tmp)
  }
  if total > 0 {
    return total
  }
  total = total + size(a)
  return total
}

fn store(take r: Item) -> Int {
  insert Row { n: 1 }
  return 0
}

fn eat(take it: Item) -> Int {
  return 0
}

fn conditional_move(take a: Item, flag: Bool) -> Int {
  if flag {
    let gone = eat(a)
  }
  return 0
}

fn self_assign(take a: Item) -> Int {
  a = a
  return 0
}

fn reinit_after_move(take a: Item) -> Int {
  let gone = eat(a)
  a = Item { n: 7 }
  return 0
}

class Row {
  n: Int
}