Str16 :: String16
arena_pointer: *Arena = null
thing: Arena
no_type := thing

arena := Arena(
  next = null,
  data = null,
  len = 1000,
  cap = 1000,
  // constant_inside = 10,
)

Arena :: struct
  // arena: Arena
  next: *Arena
  data: *int
  len : int
  cap : int

  get_len :: (s: *Arena): int
    return s.next.len


  constant_inside :: 10000


string16: Str16

String16 :: struct
  data: *void
  len : int

with_type: Arena = thing
pointer := &with_type
deref := *pointer