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

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 for VS Code setup and the list of features (some of which are VS Code specific).

Debugging

See these instructions 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 and ARCHITECTURE.md

Supported LSP features

General

• initialize
• initialized
• shutdown
• exit
• $/cancelRequest

Workspace

• workspace/workspaceFolders
• workspace/didChangeWorkspaceFolders
• workspace/didChangeConfiguration
• workspace/configuration
• workspace/didChangeWatchedFiles
• workspace/symbol
• workspace/executeCommand
• apply_code_action
• workspace/applyEdit

Text Synchronization

• textDocument/didOpen
• textDocument/didChange
• textDocument/willSave
• textDocument/willSaveWaitUntil
• textDocument/didSave
• textDocument/didClose

Diagnostics

• textDocument/publishDiagnostics

Lanuguage Features

• textDocument/completion
• open close: false
• change: Full
• will save: false
• will save wait until: false
• save: false
• completionItem/resolve
• resolve provider: none
• trigger characters: :, .
• textDocument/hover
• textDocument/signatureHelp
• trigger characters: (, ,, )
• textDocument/declaration
• textDocument/definition
• textDocument/typeDefinition
• textDocument/implementation
• textDocument/references
• textDocument/documentHighlight
• textDocument/documentSymbol
• textDocument/codeAction
• rust-analyzer.syntaxTree
• rust-analyzer.extendSelection
• rust-analyzer.matchingBrace
• rust-analyzer.parentModule
• rust-analyzer.joinLines
• rust-analyzer.run
• rust-analyzer.analyzerStatus
• textDocument/codeLens
• textDocument/documentLink
• documentLink/resolve
• textDocument/documentColor
• textDocument/colorPresentation
• textDocument/formatting
• textDocument/rangeFormatting
• textDocument/onTypeFormatting
• first trigger character: =
• more trigger character .
• textDocument/rename
• textDocument/prepareRename
• 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.