keyword">struct</span> <a class="link" href="nil.html" title="Struct nil">nil</a> <span class="special">{</span>
  <span class="comment">// <a class="link" href="nil.html#boost.nfp.nilconstruct-copy-destruct">construct/copy/destruct</a></span>
  <a class="link" href="nil.html#idp60422224-bb"><span class="identifier">nil</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="nil.html#idp60400768-bb">public member 