add child index for immediate left ancestor. Made big difference when distinguishing lists of stuff in grammar rules of ANTLRv4Parser.g4. Both java and grammars seem good with these features.
add child index for immediate left ancestor. Made big difference when distinguishing lists of stuff in grammar rules of ANTLRv4Parser.g4. Both java and grammars seem good with these features.

antlr/codebuff,antlr/codebuff,antlr/codebuff