 parsed</td>
    </tr>

    <tr>
      <td>end</td>

      <td>iterator that points to the past the end of the sequence being
      parsed</td>
    </tr>
  </table>

  <h2>Definitions</h2>

  <p>A token is the result of parsing a sequence.</p>

  <h2>Valid expressions</h2>

  <p>In addition to the expression in Assignable and CopyConstructable the
  following expressions are valid</p>

  <table border="1" summary="">
    <tr>
      <th>Name</th>

      <th>Expression</th>

      <th>Return type</th>
    </t