/span><a class="link" href="attr.html#spirit.qi.reference.auxiliary.attr.complexity">Complexity</a>
          </h6>
<div class="blockquote"><blockquote class="blockquote"><p>
              O(1)
            </p></blockquote></div>
<p>
            The complexity is constant as no input is consumed and no matching is
            done.
          </p>
<h6>
<a name="spirit.qi.reference.auxiliary.attr.h7"></a>
            <span class="phrase"><a name="spirit.qi.reference.auxiliary.attr.example"></a></span><a class