// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
-// Copyright (c) 2014-2019 Antony Polukhin
+// Copyright (c) 2014-2020 Antony Polukhin
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at