n the generated
            output as the plus generator fails (no data is available, see <a class="link" href="../operator/plus.html" title="Plus Generator (+a)">Plus
            (unary <code class="computeroutput"><span class="special">+</span></code>)</a>).
          </p>
<p>
</p>
<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;<