aracters
          from the output sequence to the input sequence.
        </p>
<pre class="programlisting">void commit(
    std::size_t n);
</pre>
<p>
          Appends <code class="computeroutput">n</code> characters from the start of the output sequence
          to the input sequence. The beginning of the output sequence is advanced
          by <code class="computeroutput">n</code> characters.
        </p>
<p>
          Requires a preceding call <code class="computeroutput">prepare(x)</code> where <cod