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Frequently-Asked Questions (FAQ)

This is the main landing page for the ANTLR 4 FAQ. The links below will take you to the appropriate file containing all answers for that subcategory.

To add to or improve this FAQ, fork the antlr/antlr4 repo then update this doc/faq/ or file(s) in that directory. Submit a pull request to get your changes incorporated into the main repository. Do not mix code and FAQ updates in the sample pull request. You must sign the contributors.txt certificate of origin with your pull request if you've not done so before.

Getting Started



Grammar syntax

Lexical analysis

Parse Trees


Actions and semantic predicates

Error handling