Added thirdparty: boost library

thirdparty/include/boost/any/fwd.hpp

@@ -0,0 +1,55 @@
+// Copyright Antony Polukhin, 2021-2023.
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Contributed by Ruslan Arutyunyan
+#ifndef BOOST_ANY_ANYS_FWD_HPP
+#define BOOST_ANY_ANYS_FWD_HPP
+
+#include <boost/config.hpp>
+#ifdef BOOST_HAS_PRAGMA_ONCE
+# pragma once
+#endif
+
+/// \file boost/any/fwd.hpp
+/// \brief Forward declarations of Boost.Any library types.
+
+/// @cond
+namespace boost {
+
+class any;
+
+namespace anys {
+
+class unique_any;
+
+template<std::size_t OptimizeForSize = sizeof(void*), std::size_t OptimizeForAlignment = alignof(void*)>
+class basic_any;
+
+namespace detail {
+
+    template <class T>
+    struct is_basic_any: public std::false_type {};
+
+    template<std::size_t OptimizeForSize, std::size_t OptimizeForAlignment>
+    struct is_basic_any<boost::anys::basic_any<OptimizeForSize, OptimizeForAlignment> > : public std::true_type {};
+
+    template <class T>
+    struct is_some_any: public is_basic_any<T> {};
+
+    template <>
+    struct is_some_any<boost::any>: public std::true_type {};
+
+    template <>
+    struct is_some_any<boost::anys::unique_any>: public std::true_type {};
+
+} // namespace detail
+
+} // namespace anys
+
+} // namespace boost
+/// @endcond
+
+#endif  // #ifndef BOOST_ANY_ANYS_FWD_HPP