Added thirdparty: boost library

thirdparty/include/boost/mysql/metadata_collection_view.hpp

@@ -0,0 +1,30 @@
+//
+// Copyright (c) 2019-2023 Ruben Perez Hidalgo (rubenperez038 at gmail dot com)
+//
+// 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)
+//
+
+#ifndef BOOST_MYSQL_METADATA_COLLECTION_VIEW_HPP
+#define BOOST_MYSQL_METADATA_COLLECTION_VIEW_HPP
+
+#include <boost/mysql/metadata.hpp>
+
+#include <boost/core/span.hpp>
+
+namespace boost {
+namespace mysql {
+
+/**
+ * \brief A read-only view of a collection of \ref metadata objects.
+ * \par Object lifetimes
+ * The object doesn't own the storage for the \ref metadata objects. These are typically
+ * owned by a \ref results or \ref execution_state object. This view is valid as long
+ * as the memory allocated for the \ref metadata objects remain valid.
+ */
+using metadata_collection_view = boost::span<const metadata>;
+
+}  // namespace mysql
+}  // namespace boost
+
+#endif