LSP support

[ericvergnaud]

This discussion is about providing antlr5 to IDEs and CI/CD using LSP.
See https://microsoft.github.io/language-server-protocol/ for LSP details.
As a business goal, we want antlr5 tool to be available in any IDE.
As of writing, most IDEs and even vi support LSP, so that makes it a good candidate.
The purpose of this discussion is to establish the corresponding spec.

[kaby76]

I now have an app trgenvsc that generates a VSCode client extension and LSP server for almost any grammar in grammars-v4. The code implements "defs", sort of "refs", and semantic highlighting. Everything in the generated code is from templates, which is why when one generates the extension/server, many files to support XPath are added.

The main issue, of course, is where to put the annotations for "defs", "refs", etc. I could add them into the desc.xml in each grammar in grammars-v4, since we already need to encode information about testing a grammar that is not encoded in a grammar, e.g., the "top-level grammar .g4's", the start symbol, test inputs, ports of the grammar, etc.

Demo:

https://www.facebook.com/ken.domino/videos/1143930370386109

[KvanTTT]

I see the following on your link:

[kaby76]

Sorry, it wasn't made public. It is now. (Github doesn't allow videos greater than 10MB, so this is why I posted it to FB, and by default my posts are restricted. Should have done to Twitter instead of FB as well, but I wasn't thinking.) The video demos the extension for grammars-v4/abb and grammars-v4/antlr/antlr4. Most of the time it spends in building the code, so you might want to browse around when there's a VSCode editor screen shown (~2:00 for abb; ~5:10 for antlr4).