Added thirdparty: boost library

thirdparty/include/boost/unordered/concurrent_flat_map_fwd.hpp

@@ -0,0 +1,51 @@
+/* Fast open-addressing concurrent hashmap.
+ *
+ * Copyright 2023 Christian Mazakas.
+ * 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)
+ *
+ * See https://www.boost.org/libs/unordered for library home page.
+ */
+
+#ifndef BOOST_UNORDERED_CONCURRENT_FLAT_MAP_FWD_HPP
+#define BOOST_UNORDERED_CONCURRENT_FLAT_MAP_FWD_HPP
+
+#include <boost/container_hash/hash_fwd.hpp>
+
+#include <functional>
+#include <memory>
+
+namespace boost {
+  namespace unordered {
+
+    template <class Key, class T, class Hash = boost::hash<Key>,
+      class Pred = std::equal_to<Key>,
+      class Allocator = std::allocator<std::pair<Key const, T> > >
+    class concurrent_flat_map;
+
+    template <class Key, class T, class Hash, class KeyEqual, class Allocator>
+    bool operator==(
+      concurrent_flat_map<Key, T, Hash, KeyEqual, Allocator> const& lhs,
+      concurrent_flat_map<Key, T, Hash, KeyEqual, Allocator> const& rhs);
+
+    template <class Key, class T, class Hash, class KeyEqual, class Allocator>
+    bool operator!=(
+      concurrent_flat_map<Key, T, Hash, KeyEqual, Allocator> const& lhs,
+      concurrent_flat_map<Key, T, Hash, KeyEqual, Allocator> const& rhs);
+
+    template <class Key, class T, class Hash, class Pred, class Alloc>
+    void swap(concurrent_flat_map<Key, T, Hash, Pred, Alloc>& x,
+      concurrent_flat_map<Key, T, Hash, Pred, Alloc>& y)
+      noexcept(noexcept(x.swap(y)));
+
+    template <class K, class T, class H, class P, class A, class Predicate>
+    typename concurrent_flat_map<K, T, H, P, A>::size_type erase_if(
+      concurrent_flat_map<K, T, H, P, A>& c, Predicate pred);
+
+  } // namespace unordered
+
+  using boost::unordered::concurrent_flat_map;
+} // namespace boost
+
+#endif // BOOST_UNORDERED_CONCURRENT_FLAT_MAP_HPP