haviour.
        </p>
<pre class="programlisting"><span class="identifier">int_type</span> <span class="identifier">overflow</span><span class="special">(</span>
    <span class="identifier">int_type</span> <span class="identifier">c</span><span class="special">);</span>
</pre>
<p>
          Behaves according to the specification of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">streambuf</span><span class="special">::</span><span clas