></a></code> or <code class="fsharp"><a
      href="../reference/primitives.html#members.FatalError"><span class="ci">FatalError</span></a></code>). By returning a <code class="fsharp"><a
      href="../reference/primitives.html#members.FatalError"><span class="ci">FatalError</span></a></code> instead of an <code class="fsharp"><a
      href="../reference/primitives.html#members.Error"><span class="ci">Error</span></a></code> a parser can signal that no error recovery should be
      tried (except through b