std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="identifier">it</span><span class="special">,</span> <span class="identifier">input</span><span class="special">.</span><span class="identifier">end</span><span class="special">())</span> <span class="special">&lt;&lt;</span> <span class="string">"\n"</span><span class="special">;</span>

<span class="comment">// seldomly needed: use std::distance to calculate the length of the match</spa