Grammar-Kit VS IntelliJ-EmmyLua

I offer, again, my JetBrains GrammarKit counterpoint from the last time that assertion came up <https://news.ycombinator.com/item?id=38192427>

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I consider the JetBrains parsing system to be world class and they seem to hand-write very few (instead building on this system: https://github.com/JetBrains/Grammar-Kit#readme )

- https://github.com/JetBrains/intellij-community/blob/idea/23... (the parser I'll concede, as they do seem to be hand-rolling that part)

- https://github.com/JetBrains/intellij-community/blob/idea/23... (same for its parser)

- https://github.com/JetBrains/intellij-community/blob/idea/23... and https://github.com/JetBrains/intellij-community/blob/idea/23...

- https://github.com/JetBrains/intellij-plugins/blob/idea/233.... and https://github.com/JetBrains/intellij-plugins/blob/idea/233....

I want to start adding support for Lua derivatives to my IDE (which adds static type checking to Lua - inference, structural & nominal types, generics etc. (Luanalysis - https://github.com/Benjamin-Dobell/IntelliJ-Luanalysis/)

I feel like plugin support would be best but I've no idea how that's supposed to work in the presence of a predefined grammar. There's also so many variants I don't think there's a good way to build composite grammar.

Does anyone have any ideas about how to extend language parsing? For reference, I'm using https://github.com/JetBrains/Grammar-Kit.

In IDEA, code generation by the GrammarKit plugin is mainly used to create a parser. Unfortunately, there is not much documentation about it and it is only presented in Tutorial and HOWTO.

Luanalysis is built atop https://github.com/JetBrains/Grammar-Kit, so can't eaisly be integrated in other languages servers.

I was about to ask you a similar question, lol. (I was browsing the page of EmmyLua — EmmyLua for IntelliJ IDEA 1.3.2 documentation, thank you for stopping me anyway.)

I used to use LDoc a few months ago but I saw some "bugs" like hover doc not recognizing the parameters type and such stuff so I'm now using EmmyLua conventions. Both almost the same, but EmmyLua works like a charm with lua-dev.nvim!

The project is a fork of EmmyLua. The idea was initially to contribute everything upstream, and in fact I did: https://github.com/EmmyLua/IntelliJ-EmmyLua/pull/342.