Implement an ErrorListener

[madchicken]

Hi, I am trying to implement an ErrorListener for my parser to collect syntax errors, but the function add_error_listener takes a boxed instance of my listener, preventing me from reusing it later in my code (to extract what I collected during the parse. phase, for example). Was it done on purpose or the method signature is wrong? Am I missing something here?

[pm100]

@madchicken got the same issue. What did you end up doing?

I assume you have the same problem. I want to know after the parse pass that there was an error and stop, not run my visitor.

I notice that the DefaultErrorStrategy inserts ErrorNodes into the resulting tree, but I cannot work out how to detect them. If I print them via {:?} the error text shows but I can work out how to ask for the type.

I have to say that this is an amazingly hard tool to use (I used antlr a lot before in other languages, easy). Its totally not obvious how to build a non trivial , production ready product with it. Toying with giving up and using pest instead , but I have a working visitor implementation, I just cant et the error handling right

[madchicken]

@pm100 yes, I could eventually solve my issue. Please look here for a response (it's me responding to myself 🙃).
Regarding the rest of your comment, I agree with you and I think this project needs more attention and maintenance before it can be used in a project. I switched to pest too.