fier">string</span><span class="special">&gt;(</span><span class="number">254</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">base</span> <span class="special">=</span> <span class="identifier">cnv</span><span class="special">::</span><span class="identifier">base</span><span class="special">::</span><span class="identifier">bin</span><span class="special">)).</spa