omment">/// The algorithm used during parsing</span>
    <span class="keyword">class</span> <span class="identifier">reader</span><span class="special">;</span>

    <span class="comment">/// The algorithm used during serialization</span>
    <span class="keyword">class</span> <span class="identifier">writer</span><span class="special">;</span>

    <span class="comment">/// Returns the body's payload size</span>
    <span class="keyword">static</span>
    <span class="identifier">std</span><span class="spe