[antlr-interest] Please help with a grammar issue

[Frank Du]

Dear All,

I have a grammar issue and need your help. Let’s say I have tree rules: a, b, c

Rule a occurs multiple times, rule b occurs one time or none, and rule c occurs one time.

My question is: How to write the grammar, so the rule ordering is arbitrary?

Thank you so much! Have a nice day!

Best Regards,
Frank

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