fier">runtime_error</span>
<span class="special">{</span>
    <span class="identifier">Iter</span> <span class="identifier">first</span><span class="special">;</span>           <span class="comment">// [first, last) iterator pointing</span>
    <span class="identifier">Iter</span> <span class="identifier">last</span><span class="special">;</span>            <span class="comment">// to the error position in the input.</span>
    <code class="computeroutput"><span class="identifier">info</span></code> <span c