textblock"><p>Forward declares <code><a class="el" href="group__group-MonadPlus.html#gaa6be1e83ad72b9d69b43b4bada0f3a75" title="Identity of the monadic combination concat.Signature Given a MonadPlus M, the signature is ...">boost::hana::empty</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_0.txt">http://boost.org/LICENSE_1_0.t