JS:

I think when the code is compiled a "report" can be generated listing the priorities along with the locations in the file would be beneficial...

It looks like a useful thing, on the other hand I think most people solve this with their IDEs instead of modifying the source code.

Anything like this already available?

I don't remember any, but it should be not too much work to implement it yourself in a little GitHub project.

Bye,
bearophile