</span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="identifier">head_finder</span><span class="special">(</span><span class="keyword">int</span> N<span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
-<a name="idp117544432"></a><h2>Description</h2>
+<a name="idp128947200"></a><h2>Description</h2>
<p>Construct the <code class="computeroutput">head_finder</code>. The finder returns a head of a given input. The head is a prefix of a string up to n elements in size. If an input has less then n elements, whole input is considered a head. The result is given as an <code class="computeroutput">iterator_range</code> delimiting the match.</p>
<p>