html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> 
  <a name="idp114753104-bb"></a><span class="identifier">compile</span><span class="special">(</span><span class="identifier">InputRange</span> <span class="keyword">const</span> <span class="special">&amp;</span> pat<span class="special">,</span> 
          <span class="identifier">flag_type</span> flags <span class="special">=</span> <span c