[antlr-interest] Trying to resolve mutual left-recursion

[Jeremy Sheldon]

Hi everyone,

 

I'm new to Antlr and have come up against mutual left-recursion for the
first time.  Despite doing some googling, I'm still struggling to try
and remove it.  Would anyone be kind enough to give me some pointers?

 

Here are the culprits:

 

query_expression

                : joined_table    

                |  non_join_query_expression;

                

non_join_query_expression

                :  non_join_query_term

                |  query_expression (UNION ALL | EXCEPT ALL)?
corresponding_spec? query_term;

 

Thanks in advance for your help,

Jeremy

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