Ryan

Feature Request: Optional Attributes

11

DDS supports the [optional attribute in IDL 4.2 specification](https://www.omg.org/spec/IDL/4.2/PDF) attribute section 8.3.1.3. In C++, now that we have C++17, we can use std::optional. A prior dicussion is here: https://discourse.ros.org/t/optional-fields-in-message/991/16 Consider...

### Generated by Generative AI Not AI ### Operating System: Ubuntu 22 in docker ### ROS version or commit hash: humble (using docker) ### RMW implementation (if applicable): N/A ###...

Specify rosidl version dependency in CMake

5

Avoid annoying issues when you accidentally mix up versions of ROS 2. Jazzy accidentally pulling in humble packages due to docker cache issues cause us a world of hurt when...