1944fc2c2b
1262: Where clauses and other Chalk improvements r=matklad a=flodiebold This adds support for where clauses to the Chalk integration; it also adds FnDef lowering and partly handles auto traits. One thing I'm not sure about is the error handling -- what do we do if we can't resolve a trait reference in a where clause? For impls, I think it's clear we need to disregard the impl for trait solving. I've solved this for now by introducing an 'unknown trait' that has no impls, so if we encounter an unknown trait we can use that and basically get a where clause that's always false. (The alternative would be somehow not returning the impl to Chalk at all, but we would need to know that we need to do that in `impls_for_trait` already, and we don't resolve anything there.) A bit surprisingly, this has almost no impact on the type inference stats for RA, probably because of missing edge cases. Probably impl Trait support and closure support will do more. Co-authored-by: Florian Diebold <flodiebold@gmail.com> |
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Rust Analyzer
Rust Analyzer is an experimental modular compiler frontend for the Rust language. It is a part of a larger rls-2.0 effort to create excellent IDE support for Rust. If you want to get involved, check the rls-2.0 working group in the compiler-team repository:
https://github.com/rust-lang/compiler-team/tree/master/working-groups/rls-2.0
Work on the Rust Analyzer is sponsored by
Language Server Quick Start
Rust Analyzer is a work-in-progress, so you'll have to build it from source, and you might encounter critical bugs. That said, it is complete enough to provide a useful IDE experience and some people use it as a daily driver.
To build rust-analyzer, you need:
- latest stable rust for language server itself
- latest stable npm and VS Code for VS Code extension (
codeshould be in path)
For setup for other editors, see ./docs/user.
# clone the repo
$ git clone https://github.com/rust-analyzer/rust-analyzer && cd rust-analyzer
# install both the language server and VS Code extension
$ cargo install-code
# alternatively, install only the server. Binary name is `ra_lsp_server`.
$ cargo install-lsp
Documentation
If you want to contribute to rust-analyzer or just curious about how things work under the hood, check the ./docs/dev folder.
If you want to use rust-analyzer's language server with your editor of choice, check ./docs/user folder. It also contains some tips & tricks to help you be more productive when using rust-analyzer.
Getting in touch
We are on the rust-lang Zulip!
https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frls-2.2E0
Quick Links
- Work List: https://paper.dropbox.com/doc/RLS-2.0-work-list--AZ3BgHKKCtqszbsi3gi6sjchAQ-42vbnxzuKq2lKwW0mkn8Y
- API docs: https://rust-analyzer.github.io/rust-analyzer/ra_ide_api/index.html
- CI: https://travis-ci.org/rust-analyzer/rust-analyzer
License
Rust analyzer is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See LICENSE-APACHE and LICENSE-MIT for details.