Added thirdparty: boost library

thirdparty/include/boost/hana/reverse_fold.hpp

@@ -0,0 +1,37 @@
+/*!
+@file
+Defines `boost::hana::reverse_fold`.
+
+Copyright Louis Dionne 2013-2022
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+ */
+
+#ifndef BOOST_HANA_REVERSE_FOLD_HPP
+#define BOOST_HANA_REVERSE_FOLD_HPP
+
+#include <boost/hana/fwd/reverse_fold.hpp>
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/fold_right.hpp>
+#include <boost/hana/functional/flip.hpp>
+
+
+namespace boost { namespace hana {
+    //! @cond
+    template <typename Xs, typename S, typename F>
+    constexpr decltype(auto) reverse_fold_t::operator()(Xs&& xs, S&& s, F&& f) const {
+        return hana::fold_right(static_cast<Xs&&>(xs),
+                                static_cast<S&&>(s),
+                                hana::flip(static_cast<F&&>(f)));
+    }
+
+    template <typename Xs, typename F>
+    constexpr decltype(auto) reverse_fold_t::operator()(Xs&& xs, F&& f) const {
+        return hana::fold_right(static_cast<Xs&&>(xs),
+                                hana::flip(static_cast<F&&>(f)));
+    }
+    //! @endcond
+}} // end namespace boost::hana
+
+#endif // !BOOST_HANA_REVERSE_FOLD_HPP