vscode-rust VS rust-analyzer

> it crashes process IDs more often than Justin Bieber crashes Maseratis: https://github.com/rust-lang/vscode-rust/issues/890

So -- this guy used an extension (named Rust) with rust-analyzer, which was known to not work, and it didn't work(!), and the Rust extension author recommends he tries the extension made for rust-analyzer. That extension doesn't have the features he likes (it works for me and has loads of features, so I have no idea what this is about?), and so they close the issue?

Hardly a case for the ages. Guy uses unsupported config and things don't work?

> What clangd does is work.

Don't doubt it. I'm just saying -- I haven't had any problems with the rust-analyzer extension since it became the Rust default. But, yes, I had a few hiccups and crashes beforehand, no doubt. I just have to imagine it's both younger, and doing more/different things than clangd.

I know. It's been argued for a long time. But at least if you follow the advice to install RA, it's fine. And if you don't, you won't be able to install RLS anyway, but instead get a helpful message pointing to RA.

But the last commit to the Code extension was almost one year ago (an URL update), a pull request for a pretty annoying issue was not merged in more than a year, and the only activity on the issue tracker is people complaining about old issues and sometimes me asking them nicely to try rust-analyzer instead (but only when I'm pretty certain that their issue does not happen in RA).

It's been asked before: https://github.com/rust-lang/vscode-rust/issues/927. Basically, rust-analyzer is not (yet?) a rust-lang.org project and it's not even going to be mentioned in the official docs until that happens.

Yeah, see e.g. https://github.com/rust-lang/vscode-rust/issues/880.

RA will be merged with the vscode-rust extension and aims to replace RLS (tracking issue on the vscode-rust repo).

go build 3.62s user 0.76s system 171% cpu 2.545 total

I was looking forward to parallel front-end[4], but I have not seen any improvement for these small changes.

[1]: https://github.com/rust-lang/rust-analyzer

For example, intelephense can show diagnostics in real time, there is no need to save the file to get new diagnostics. But rust-analyzer, the language server for rust, can only update diagnostics after saving the file.

6. Rust Analyzer

The rust-analyzer readme suggests you go here for support request. But even there, you'll need to provide more details to get useful help.

For example: https://github.com/rust-lang/rust-analyzer/blob/master/docs/...

> If you create an LSP, it will work best in VS Code.

Any editor can work just as well as (or even better than) VS Code.

So, apparently the reason why rust-analyzer, the LSP server for Rust does not have persistent caching is because it would make "optimizing initial passes less important".

All I want to know is: Will it have a build configuration pulldown?

I am not a Rust dev. It surely looks great.

However, from what I understand it seems to supply just a parser separate from the Rust compiler (https://github.com/rust-lang/rust-analyzer/tree/master/crate...) trying to keep up with Rust‘s development. So, in principle, it could have been just another treesitter parser plugin, too.

So, again, the LSP framework does not directly provide any magical benefit over a static parsing framework. All the semantic analysis capabilities stem from a good parser.

rust-analyzer > manual > helix > binary > rustup component add rust-analyzer