Added thirdparty: boost library

thirdparty/include/boost/redis/resp3/node.hpp

@@ -0,0 +1,64 @@
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_RESP3_NODE_HPP
+#define BOOST_REDIS_RESP3_NODE_HPP
+
+#include <boost/redis/resp3/type.hpp>
+
+namespace boost::redis::resp3 {
+
+/** \brief A node in the response tree.
+ *  \ingroup high-level-api
+ *
+ *  RESP3 can contain recursive data structures: A map of sets of
+ *  vector of etc. As it is parsed each element is passed to user
+ *  callbacks (push parser). The signature of this
+ *  callback is `f(resp3::node<std::string_view)`. This class is called a node
+ *  because it can be seen as the element of the response tree. It
+ *  is a template so that users can use it with owing strings e.g.
+ *  `std::string` or `boost::static_string` etc.
+ *
+ *  @tparam String A `std::string`-like type.
+ */
+template <class String>
+struct basic_node {
+   /// The RESP3 type of the data in this node.
+   type data_type = type::invalid;
+
+   /// The number of elements of an aggregate.
+   std::size_t aggregate_size{};
+
+   /// The depth of this node in the response tree.
+   std::size_t depth{};
+
+   /// The actual data. For aggregate types this is usually empty.
+   String value{};
+};
+
+/** @brief Compares a node for equality.
+ *  @relates basic_node
+ *
+ *  @param a Left hand side node object.
+ *  @param b Right hand side node object.
+ */
+template <class String>
+auto operator==(basic_node<String> const& a, basic_node<String> const& b)
+{
+   return a.aggregate_size == b.aggregate_size
+       && a.depth == b.depth
+       && a.data_type == b.data_type
+       && a.value == b.value;
+};
+
+/** @brief A node in the response tree.
+ *  @ingroup high-level-api
+ */
+using node = basic_node<std::string>;
+
+} // boost::redis::resp3
+
+#endif // BOOST_REDIS_RESP3_NODE_HPP