/div>
<p>
            Peek at the incoming data on the stream. Returns the number of bytes
            read. Throws an exception on failure.
          </p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
    <span class="keyword">typename</span> <a class="link" href="../../MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a><span class="special">&gt;</span>
<span class="identifier">std</span><span class="special