tifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;()[*</span><span class="identifier">char_</span><span class="special">]</span> <span class="special">&lt;&lt;</span> <span class="identifier">double_</span><span class="special">,</span> <span class="identifier">ut</span><span class="special">);</span>

<span class="identifier">ut</span><span class="special">.</span><span class="identifier">clear</span><span class="special">();</span>

<span clas