164 lines
9.2 KiB
Markdown
164 lines
9.2 KiB
Markdown
# Rust Analyzer
|
|
|
|
[](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.
|
|
|
|
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.
|
|
|
|
Work on the Rust Analyzer is sponsored by
|
|
|
|
[](https://ferrous-systems.com/)
|
|
|
|
## Quick Start
|
|
|
|
Rust analyzer builds on Rust >= 1.31.0 and uses the 2018 edition.
|
|
|
|
```
|
|
# run tests
|
|
$ cargo test
|
|
|
|
# show syntax tree of a Rust file
|
|
$ cargo run --package ra_cli parse < crates/ra_syntax/src/lib.rs
|
|
|
|
# show symbols of a Rust file
|
|
$ 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](./editors/README.md) for VS Code setup and the list of
|
|
features (some of which are VS Code specific).
|
|
|
|
## Debugging
|
|
|
|
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.
|
|
|
|
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:
|
|
|
|
- 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.
|
|
|
|
- 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.
|
|
|
|
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.
|
|
|
|
## Supported LSP features
|
|
|
|
### General
|
|
- [x] [initialize](https://microsoft.github.io/language-server-protocol/specification#initialize)
|
|
- [x] [initialized](https://microsoft.github.io/language-server-protocol/specification#initialized)
|
|
- [x] [shutdown](https://microsoft.github.io/language-server-protocol/specification#shutdown)
|
|
- [ ] [exit](https://microsoft.github.io/language-server-protocol/specification#exit)
|
|
- [x] [$/cancelRequest](https://microsoft.github.io/language-server-protocol/specification#cancelRequest)
|
|
|
|
### Workspace
|
|
- [ ] [workspace/workspaceFolders](https://microsoft.github.io/language-server-protocol/specification#workspace_workspaceFolders)
|
|
- [ ] [workspace/didChangeWorkspaceFolders](https://microsoft.github.io/language-server-protocol/specification#workspace_didChangeWorkspaceFolders)
|
|
- [x] [workspace/didChangeConfiguration](https://microsoft.github.io/language-server-protocol/specification#workspace_didChangeConfiguration)
|
|
- [ ] [workspace/configuration](https://microsoft.github.io/language-server-protocol/specification#workspace_configuration)
|
|
- [x] [workspace/didChangeWatchedFiles](https://microsoft.github.io/language-server-protocol/specification#workspace_didChangeWatchedFiles)
|
|
- [x] [workspace/symbol](https://microsoft.github.io/language-server-protocol/specification#workspace_symbol)
|
|
- [x] [workspace/executeCommand](https://microsoft.github.io/language-server-protocol/specification#workspace_executeCommand)
|
|
- `apply_code_action`
|
|
- [ ] [workspace/applyEdit](https://microsoft.github.io/language-server-protocol/specification#workspace_applyEdit)
|
|
|
|
### Text Synchronization
|
|
- [x] [textDocument/didOpen](https://microsoft.github.io/language-server-protocol/specification#textDocument_didOpen)
|
|
- [x] [textDocument/didChange](https://microsoft.github.io/language-server-protocol/specification#textDocument_didChange)
|
|
- [ ] [textDocument/willSave](https://microsoft.github.io/language-server-protocol/specification#textDocument_willSave)
|
|
- [ ] [textDocument/willSaveWaitUntil](https://microsoft.github.io/language-server-protocol/specification#textDocument_willSaveWaitUntil)
|
|
- [x] [textDocument/didSave](https://microsoft.github.io/language-server-protocol/specification#textDocument_didSave)
|
|
- [x] [textDocument/didClose](https://microsoft.github.io/language-server-protocol/specification#textDocument_didClose)
|
|
|
|
### Diagnostics
|
|
- [x] [textDocument/publishDiagnostics](https://microsoft.github.io/language-server-protocol/specification#textDocument_publishDiagnostics)
|
|
|
|
### Lanuguage Features
|
|
- [x] [textDocument/completion](https://microsoft.github.io/language-server-protocol/specification#textDocument_completion)
|
|
- open close: false
|
|
- change: Full
|
|
- will save: false
|
|
- will save wait until: false
|
|
- save: false
|
|
- [x] [completionItem/resolve](https://microsoft.github.io/language-server-protocol/specification#completionItem_resolve)
|
|
- resolve provider: none
|
|
- trigger characters: `:`, `.`
|
|
- [x] [textDocument/hover](https://microsoft.github.io/language-server-protocol/specification#textDocument_hover)
|
|
- [x] [textDocument/signatureHelp](https://microsoft.github.io/language-server-protocol/specification#textDocument_signatureHelp)
|
|
- trigger characters: `(`, `,`, `)`
|
|
- [ ] [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/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
|
|
- [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)
|
|
- [ ] [textDocument/documentColor](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentColor)
|
|
- [ ] [textDocument/colorPresentation](https://microsoft.github.io/language-server-protocol/specification#textDocument_colorPresentation)
|
|
- [x] [textDocument/formatting](https://microsoft.github.io/language-server-protocol/specification#textDocument_formatting)
|
|
- [ ] [textDocument/rangeFormatting](https://microsoft.github.io/language-server-protocol/specification#textDocument_rangeFormatting)
|
|
- [x] [textDocument/onTypeFormatting](https://microsoft.github.io/language-server-protocol/specification#textDocument_onTypeFormatting)
|
|
- first trigger character: `=`
|
|
- more trigger character `.`
|
|
- [x] [textDocument/rename](https://microsoft.github.io/language-server-protocol/specification#textDocument_rename)
|
|
- [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
|
|
license and the Apache License (Version 2.0).
|
|
|
|
See LICENSE-APACHE and LICENSE-MIT for details.
|