etailed Description</h2>
<div class="textblock"><p>Forward declares <code><a class="el" href="group__group-Foldable.html#ga38c6b3f6b1cbadb9b8432a05ff16b7d2" title="Left-fold of a structure using a binary operation and an optional initial reduction state...">boost::hana::fold_left</a></code>. </p>
<dl class="section copyright"><dt>Copyright</dt><dd>Louis Dionne 2013-2017 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE.md or copy at <a href="http://boost.org/LICENSE_1