Indirect Left Recursion Precedence PR Feedback & Rule of Thumb for Rule Analysis

[MisterErwin]

Hey there,

I understand that time is a limited resource, but I was wondering if I could receive some feedback on a PR of mine #4480

Especially when it comes to the analysis of indirect recursion:

The existing LeftRecursiveRuleWalker recursion-detection of single rules utilizes a RuleWalker grammar,
while my proposal walks rules & rule references using Java code.

Does the ANTLR team have a preference? (I started this part in Java simply due to my experience with it.)

Thanks :)