#foreign do_something :: (val: U32)

Token :: struct
  str: *U8
  len: S64

is_numeric :: (c: U8): Bool
  result := c >= '0 && c <= '9
  return result

entry :: ()
  string_to_lex := "Identifier 2425525 Not_Number"
  token_array: [32]Token
  token_count: U32

  do_something(32)

  t: Token
  for i := 0, i < string_to_lex.len, i+=1
    if is_numeric(string_to_lex.str[i])
      t.str = &string_to_lex.str[i]
      t.len = i
      for is_numeric(string_to_lex.str[i])
        i+=1
      t.len = i - t.len
      token_array[token_count++] = t
      token_count+=1