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sharwell avatar sharwell commented on July 17, 2024

The example grammar contains an LR rule (expr) containing a left-edge rule reference to a different LR rule (strongExpr). However, since strongExpr does not contain a left-edge rule reference back to expr, the grammar after LR translation does not contain any left recursion so it could be correctly generated. Whether or not ANTLR will support LR rules invoking other LR rules is left to be determined.

The tool should either generate working code or produce an error message and fail to generate code.

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JFinis avatar JFinis commented on July 17, 2024

is it possible to fix this issue in the near future? It is a real blocker for my current project (yes, I know, I should not depend on an ea version ;).

@sharwell: Ter stated that only mutually left recursive rules are forbidden. The example is not mutually left recursive, so it should compile fine.

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parrt avatar parrt commented on July 17, 2024

ha! I just figured this out!!! don't use rule as a rule name because it becomes RuleContext which is the predefined context object.

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JFinis avatar JFinis commented on July 17, 2024

great, the sempred is gone. I guess you should disallow rules with that name. However, the generated parser still does not work, see the new issue: #45

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sharwell avatar sharwell commented on July 17, 2024

I created #77 to address the naming problems.

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