="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">create_generator_exists</span></code>
                returns <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code>).
              </p></dd>
</dl>
</div>
<h6>
<a name="spirit.karma.reference.auto.h4"></a>
          <span class="phrase"><a name="spirit.karma.reference.auto.expression_semantics"></a></span><a clas