Is langium appropriate to add browser/ide support to an existing language?

[RickeyWard]

My team used Jexl (Apache Java expression language ) as scripting in a project. There's no tooling available for IDEs to help with jexl and ideally our Monaco web inputs would support it too)

I was wondering if that's an appropriate use case for langium or if it's more tailored specifically for creating new languages.

Thanks!

[msujew]

Hey @RickeyWard,

I wasn't aware of Jexl yet, but it looks like a good use case for Langium. In fact, existing languages are often times easier to support using Langium compared to novel languages, because they usually have a well-defined grammar that can be poured into our grammar format.

Looking closer at Jexl, it seems to import Java types - this isn't a problem for Langium in general (our linking feature is very generic), but getting this to work often times requires some sort of JDK bridge/adapter. We built something like that for this project (see java-interop folder for more info), in case you're interested to see what I'm talking about.

The current version of the yeoman generator we offer for langium (see here and here) supports creating a VS Code extension and a monaco web-worker for online IDE support.

[RickeyWard]

Thank you so much for answer!

[spoenemann]

See this conference presentation for an overview of the example project with java-interop mentioned by Mark, and specifically the Java-related challenges:
https://www.youtube.com/watch?v=FD1p7dPHiIw&list=PLmmNK7CRoSWt5oY4OnvZOkrVBQklvxrG8&index=3