Document interaction between Type-Adapters and intra-process communication
Rclcpp seems to have implemented intra-process communication without serializing custom data types to ROS messages when the apropriate type adapters are used: https://github.com/ros2/rclcpp/issues/1664, but this is not documented.
The type adapter is already used in the subscriber and publisher examples.
The demos repo contains an adapter for cv::Mat (header, implementation) which is used in cam2image.cpp
I found more information in this comment to the PR implementing this feature: https://github.com/ros2/rclcpp/pull/1849#issuecomment-998278233
Thanks, appreciated. I put it on the list of things to look at during the Humble documentation/release process.