identifier">value_type</span><span class="special">::</span><span class="identifier">size</span></code></a> octets, else <code class="computeroutput"><span class="keyword">nullptr</span></code>.
        </p>
<h6>
<a name="beast.ref.boost__beast__http__buffer_body__value_type.data.h0"></a>
          <span class="phrase"><a name="beast.ref.boost__beast__http__buffer_body__value_type.data.synopsis"></a></span><a class="link" href="data.html#beast.ref.boost__beast__http__buffer_body__value_type.data.synopsis">S