yword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> BidiIter<span class="special">&gt;</span> 
  <span class="identifier">proto</span><span class="special">::</span><span class="identifier">terminal</span><span class="special">&lt;</span> <span class="identifier">reference_wrapper</span><span class="special">&lt;</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier"