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"

  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]
      for is_numeric(string_to_lex.str[i])
        i+=1