arp"><a href="../reference/charparsers.html#members.stringReturn"><span
      class="ci">stringReturn</span></a></code> only advances the stream position when it succeeds. This makes it an <em>atomic</em> string parser,
      because it does not consume input if only the beginning of the argument string matches the input. Whether or not a parser consumes input before
      it fails has important implications for the error handling, as we will discuss later in this user’s guide.
     </p>
    </div>
    <d