 </p>
<pre class="programlisting"><span class="comment">// the following generates: (1.0, 2.0)</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">str</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">back_insert_iterator</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifie