Added thirdparty: boost library

thirdparty/include/boost/hana/fwd/negate.hpp

@@ -0,0 +1,42 @@
+/*!
+@file
+Forward declares `boost::hana::negate`.
+
+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_FWD_NEGATE_HPP
+#define BOOST_HANA_FWD_NEGATE_HPP
+
+#include <boost/hana/config.hpp>
+#include <boost/hana/core/when.hpp>
+
+
+namespace boost { namespace hana {
+    //! Return the inverse of an element of a group.
+    //! @ingroup group-Group
+    //!
+    //!
+    //! Example
+    //! -------
+    //! @include example/negate.cpp
+#ifdef BOOST_HANA_DOXYGEN_INVOKED
+    constexpr auto negate = [](auto&& x) -> decltype(auto) {
+        return tag-dispatched;
+    };
+#else
+    template <typename G, typename = void>
+    struct negate_impl : negate_impl<G, when<true>> { };
+
+    struct negate_t {
+        template <typename X>
+        constexpr decltype(auto) operator()(X&& x) const;
+    };
+
+    BOOST_HANA_INLINE_VARIABLE constexpr negate_t negate{};
+#endif
+}} // end namespace boost::hana
+
+#endif // !BOOST_HANA_FWD_NEGATE_HPP