Virtual Meetup - Introduction to ANTLR - II part

Hi Community,

I am happy to announce that this Thursday (the 28th of October), Mike Cargal will hold the second part of the discussion about “Introduction to ANTLR”.

Also, remember that we changed the link to join the Meetup!

An introduction to ANTLR covering an overview of the parsing pipeline, basic ANTLR grammar, tooling, and processing the resulting parse trees. (influenced by recent efforts answering many StackOverflow ANTLR4 questions and dealing with misconceptions). We will attempt to provide a foundation to avoid many of the problems I’ve seen from StackOverflow questions, and provide pointers working with (rather than against) ANTLR. The focus will be on a solid foundation for using ANTLR in a target-language agnostic fashion, and won’t attempt to cover “all things ANTLR”

Mike Cargal retired a bit over a year ago from a career in IT working for TSYS (a US company doing third-party processing for credit cards). In that role, one of the products he implemented (and re-implemented, many years later in ANTLR) was Determinator, language clients use to inject their own logic into processing. The latest version parsed on the server in Java, but also in the browser using JavaScript, and provided with a text and graphical view of the logic. The text view, with syntax highlighting, code completion, error highlighting etc. and the graphical view allowing for full abilities to edit in the graphical view, including drag and drop re-arranging of logic, expressions etc. toggling between source and graphical views was continuously synchronized. This rewrite using ANTLR sparked an interest in ANTLR, and, in his retirement, he’s attempting to contribute in some small way to the ANTLR community (so far, mainly answering StackOverflow questions, which has been “enlightening”).

And if you are thinking of proposing a talk, it is time to come forward. Just let me know by replying to this message.

How to connect

To avoid other security issues is now necessary to register for the meeting. The registration should be necessary just once and be valid for all the next meetings you will participate in. I understand it is a little extra effort, but it would avoid problems like the ones we encountered:

Registration for the Virtual Meetup

After registering, you will receive a confirmation email containing information about joining the meeting. It will also permit you to add it to your calendar.


It is hosted on Zoom at 6 PM GMT+1/CEST (you can use this link to figure out which time is in your timezone: Dateful Time Zone Converter).


P.S. We get a recurring question: “Are presentations recorded?”. The answer is not, and the reasons are explained here On recording Virtual Meetups - #7 by voelter

The repo I referenced in today’s talk is

In the root directory, You’l find a keynote file for the actual presentation I used for the two talks.

There’s also a ANTLRIntro_verbose.pdf that is is probably better for reference as it more verbose (I prefer to do talks with slides that are a little less “wall of words”.). Since it will be referenced without an accompanying talk, there is more text on the slides.

Feel free to post issues to the repo. I’ll also consider PRs, if there’s something you find could be improved. (Do keep in mind, that I want to keep this very succinct, so I won’t likely be trying to “flesh out” functionality in the silly little language, as it’s just meant to provide some reference examples.)

Thanks, everyone, for such a gracious audience and your patience as I tried to race through what was clearly probably 4 hours of content :roll_eyes:.