n class="special">;</span>

<span class="keyword">typedef</span> <span class="identifier">x3</span><span class="special">::</span><span class="identifier">context</span><span class="special">&lt;</span>
    <span class="identifier">error_handler_tag</span>
  <span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">reference_wrapper</span><span class="special">&lt;</span><span class="identifier">position_cache</span><span class="special">&gt;</