Where do I ask questions about the antlr4 C++ demo?

I’ve only been here about a month and I struggle to understand the structure of this site.

I am developing an ANTLR4 project in C++ and have a question about the demo located here:

antlr/runtime/Cpp/demo

Where should I ask my question, i.e. in which subforum? 

You can ask them over at the Issues page on the repository: https://github.com/antlr/antlr4/issues , or ask them in this forum: https://github.community/t5/Project-Development-Help-and/bd-p/Project-development-help-and-advice .

Keep in mind that this forum is pretty wide-focused so you’ll find a lot more people with knowledge about the actual project over at the Issues section of the project.