 a model of <code>Foldable</code> makes it possible to turn a <code>Struct</code> into basically any <code>Sequence</code>, but also into a <code><a class="el" href="structboost_1_1hana_1_1map.html" title="Basic associative container requiring unique, Comparable and Hashable keys. ">hana::map</a></code> by simply using the <code>to&lt;...&gt;</code> function! <div class="fragment"><div class="line"><span class="comment">// Copyright Louis Dionne 2013-2017</span></div><div class="line"><span class="comment">