I'm learning about using ANTLR and have just end up this wired problem. I read many article but still stuck with this problem. Please help me.
expr: expr '+' INT| index;
index: expr '[' expr ']';
Thanks
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Please show your whole grammar for the parser and the lexer. – TomServo Sep 26 '18 at 16:48
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Answered [here](https://stackoverflow.com/questions/47100729/antlr4-left-recursive-error/47104644#47104644). – GRosenberg Sep 26 '18 at 18:47