Adds more doc to node class.

Author: mzimbres

README.md

@@ -6,18 +6,18 @@ that implements the latest version of the Redis communication
 protocol
 [RESP3](https://github.com/redis/redis-specifications/blob/master/protocol/RESP3.md).
 It makes communication with a Redis server easy by hiding low-level
-Asio-related code away from the user, which, in the majority of the
-cases will be concerned with only three library entities
+code away from the user, which, in the majority of the cases will be
+concerned with only three library entities
 
-* `aedis::connection`: A connection to the Redis server that
-  implements automatic
-  [pipelining](https://redis.io/docs/manual/pipelining/) and which can
-  handle requests and server pushes concurrently.
+* `aedis::connection`: A connection to the Redis server with
+  high-level functions to execute Redis commands, receive server
+  pushes and support for automatic command
+  [pipelines](https://redis.io/docs/manual/pipelining/).
 * `aedis::resp3::request`: A container of Redis commands that supports
   STL containers and user defined data types.
 * `aedis::adapt()`: A function that adapts data structures to receive responses.
 
-In the next sections we will cover all those points in detail and with
+In the next sections we will cover all those points in detail with
 examples. The requirements for using Aedis are
 
 * Boost 1.80 or greater.
@@ -53,7 +53,7 @@ auto co_main() -> net::awaitable<void>
    // From examples/common.hpp to avoid vebosity
    co_await connect(conn, "127.0.0.1", "6379");
 
-   // A request can contains multiple commands.
+   // A request can contain multiple commands.
    resp3::request req;
    req.push("HELLO", 3);
    req.push("HGETALL", "hset-key");
@@ -71,8 +71,8 @@ auto co_main() -> net::awaitable<void>
 ```
 
 The example above uses the Asio awaitable `operator ||` to compose
-`connection::async_exec` and `connection::async_run` in a single
-operation we can `co_await` on. It also provides cancelation one of
+`connection::async_exec` and `connection::async_run` in an
+operation we can `co_await` on. It also provides cancelation of one of
 the operations when the other completes.  The role played by these
 functions are
 

include/aedis/resp3/node.hpp

@@ -14,11 +14,33 @@ namespace aedis::resp3 {
 /** \brief A node in the response tree.
  *  \ingroup high-level-api
  *
- *  Redis responses are the pre-order view of the response tree (see
- *  https://en.wikipedia.org/wiki/Tree_traversal#Pre-order,_NLR).
+ *  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 `aedis::adapt` function. 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. if they decide to use a node as
+ *  response type, for example, to read a non-aggregate data-type use
  *
- *  \remark Any Redis response can be received in an array of nodes,
- *  for example \c std::vector<node<std::string>>.
+ *  ```cpp
+ *  resp3::node<std::string> resp;
+ *  co_await conn->async_exec(req, adapt(resp));
+ *  ```
+ *
+ *  for an aggregate use instead
+ *
+ *  ```cpp
+ *  std::vector<resp3::node<std::string>> resp; co_await
+ *  conn->async_exec(req, adapt(resp));
+ *  ```
+ *
+ *  The vector will contain the
+ *  [pre-order](https://en.wikipedia.org/wiki/Tree_traversal#Pre-order,_NLR)
+ *  view of the response tree.  Any Redis response can be received in
+ *  an array of nodes as shown above.
+ *
+ *  \tparam String A `std::string`-like type.
  */
 template <class String>
 struct node {