Parser</span></a></code> functions work, we will discuss the implementation
     of a simple string parser. This also gives us the opportunity to explain some important details about the <code class="fsharp"><a
     href="../reference/reply.html"><span class="ci">Reply</span></a></code> and <code class="fsharp"><a
     href="../reference/charstream.html#CharStream"><span class="ci">CharStream</span></a></code> types.
    </p>
   </div>
  </div>
  <div id="the-code" class="section s3">
   <h2 class="title h3