[](https://travis-ci.org/rust-analyzer/rust-analyzer)
Rust Analyzer is an **experimental** modular compiler frontend for the Rust
-language, which aims to lay a foundation for excellent IDE support.
+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 rls-2.0 working group repository:
-It doesn't implement much of compiler functionality yet, but the white-space
-preserving Rust parser works, and there are significant chunks of overall
-architecture (indexing, on-demand & lazy computation, snapshotable world view)
-in place. Some basic IDE functionality is provided via a language server.
+https://github.com/rust-analyzer/WG-rls2.0
Work on the Rust Analyzer is sponsored by
$ cargo run --package ra_cli symbols < crates/ra_syntax/src/lib.rs
# install the language server
+$ cargo install-lsp
+or
$ cargo install --path crates/ra_lsp_server
```
See [these instructions](./DEBUGGING.md) on how to debug the vscode extension and the lsp server.
-## Current Status and Plans
-
-Rust analyzer aims to fill the same niche as the official [Rust Language
-Server](https://github.com/rust-lang-nursery/rls), but uses a significantly
-different architecture. More details can be found [in this
-thread](https://internals.rust-lang.org/t/2019-strategy-for-rustc-and-the-rls/8361),
-but the core issue is that RLS works in the "wait until user stops typing, run
-the build process, save the results of the analysis" mode, which arguably is the
-wrong foundation for IDE.
-
-Rust Analyzer is an experimental project at the moment, there's exactly zero
-guarantees that it becomes production-ready one day.
+## Getting in touch
-The near/mid term plan is to work independently of the main rustc compiler and
-implement at least simplistic versions of name resolution, macro expansion and
-type inference. The purpose is two fold:
+We are on the rust-lang Zulip!
-- to quickly bootstrap usable and useful language server: solution that covers
- 80% of Rust code will be useful for IDEs, and will be vastly simpler than 100%
- solution.
+https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frls-2.2E0
-- to understand how the consumer-side of compiler API should look like
- (especially it's on-demand aspects). If you have `get_expression_type`
- function, you can write a ton of purely-IDE features on top of it, even if the
- function is only partially correct. Pluging in the precise function afterwards
- should just make IDE features more reliable.
+## Contributing
-The long term plan is to merge with the mainline rustc compiler, probably around
-the HIR boundary? That is, use rust analyzer for parsing, macro expansion and
-related bits of name resolution, but leave the rest (including type inference
-and trait selection) to the existing rustc.
+See [CONTRIBUTING.md](./CONTRIBUTING.md) and [ARCHITECTURE.md](./ARCHITECTURE.md)
## Supported LSP features
- [ ] [textDocument/declaration](https://microsoft.github.io/language-server-protocol/specification#textDocument_declaration)
- [x] [textDocument/definition](https://microsoft.github.io/language-server-protocol/specification#textDocument_definition)
- [ ] [textDocument/typeDefinition](https://microsoft.github.io/language-server-protocol/specification#textDocument_typeDefinition)
-- [ ] [textDocument/implementation](https://microsoft.github.io/language-server-protocol/specification#textDocument_implementation)
+- [x] [textDocument/implementation](https://microsoft.github.io/language-server-protocol/specification#textDocument_implementation)
- [x] [textDocument/references](https://microsoft.github.io/language-server-protocol/specification#textDocument_references)
- [x] [textDocument/documentHighlight](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentHighlight)
- [x] [textDocument/documentSymbol](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentSymbol)
- [x] [textDocument/codeAction](https://microsoft.github.io/language-server-protocol/specification#textDocument_codeAction)
- - ra_lsp.syntaxTree
- - ra_lsp.extendSelection
- - ra_lsp.matchingBrace
- - ra_lsp.parentModule
- - ra_lsp.joinLines
- - ra_lsp.run
- - ra_lsp.analyzerStatus
+ - rust-analyzer.syntaxTree
+ - rust-analyzer.extendSelection
+ - rust-analyzer.matchingBrace
+ - rust-analyzer.parentModule
+ - rust-analyzer.joinLines
+ - rust-analyzer.run
+ - rust-analyzer.analyzerStatus
- [x] [textDocument/codeLens](https://microsoft.github.io/language-server-protocol/specification#textDocument_codeLens)
- [ ] [textDocument/documentLink](https://microsoft.github.io/language-server-protocol/specification#codeLens_resolve)
- [ ] [documentLink/resolve](https://microsoft.github.io/language-server-protocol/specification#documentLink_resolve)
- [x] [textDocument/prepareRename](https://microsoft.github.io/language-server-protocol/specification#textDocument_prepareRename)
- [x] [textDocument/foldingRange](https://microsoft.github.io/language-server-protocol/specification#textDocument_foldingRange)
-## Getting in touch
-
-We have a Discord server dedicated to compilers and language servers
-implemented in Rust: [https://discord.gg/sx3RQZB](https://discord.gg/sx3RQZB).
-
-## Contributing
-
-See [CONTRIBUTING.md](./CONTRIBUTING.md) and [ARCHITECTURE.md](./ARCHITECTURE.md)
-
## License
Rust analyzer is primarily distributed under the terms of both the MIT
projects / rust.git / blobdiff