  </p>
<pre class="programlisting"><span class="identifier">int_type</span> <span class="identifier">underflow</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 class="identifier">underflow</span><span class="special">()</span></code>.
        </p>
</div>
<table xmlns:rev="http://www.cs