No semantic token information for macro parameters

Environment

OS and Version: Windows 10 22H2 19045
VS Code Version: 1.75.1
C/C++ Extension Version: 1.14.3

Bug Summary and Steps to Reproduce

Bug Summary:

The built-in textmate grammar attempts to detect macro parameters. However, it's not particularly successful. This is a place where semantic token information from the extension would help.

In this image examples 1 and 3 are incorrect.
In example 1 param is meta.preprocessor.macro.cpp.
In example 2 #param is correctly recognized as variable.other.macro.argument.cpp. I'm unsure if it should contain the # though.
In example 3 #bar is incorrectly marked as variable.other.macro.argument.cpp.

I think the desired outcome here is to mark param as semantic variable.macro and map that to syntax variable.other.macro.argument.cpp, or at least something roughly equivalent. And also to not mark bar as a variable.

Configuration and Logs

N/A

Other Extensions

No response

Additional context

No response

Start by reading the built-in textmate grammar and the extension's semantic token handling for C++ macro parameters. Reproduce the examples from the issue and trace how param and #bar are classified. Done means macro parameters receive the intended variable.macro semantic mapping and non-parameters such as bar are not marked as variables.