# Rust Analyzer [](https://travis-ci.org/rust-analyzer/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 rls-2.0 working group repository: https://github.com/rust-analyzer/WG-rls2.0 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. ## Getting in touch We are on the rust-lang Zulip! https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frls-2.2E0 ## Contributing See [CONTRIBUTING.md](./CONTRIBUTING.md) and [ARCHITECTURE.md](./ARCHITECTURE.md) ## 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) - [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) - 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) - [ ] [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) ## 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.