mirror of
https://github.com/rust-lang/rust-analyzer
synced 2024-11-16 09:48:10 +00:00
101 lines
3.6 KiB
Markdown
101 lines
3.6 KiB
Markdown
# Rust Analyzer
|
|
|
|
[](https://travis-ci.org/rust-analyzer/rust-analyzer)
|
|
[](https://ci.appveyor.com/project/matklad/rust-analyzer/branch/master)
|
|
|
|
|
|
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 >= 1.30.0 (currently in beta) 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
|
|
```
|
|
|
|
To try out the language server, see [these
|
|
instructions](./editors/README.md). Please note that the server is not
|
|
ready for general use yet. If you are looking for a Rust IDE that
|
|
works, use [IntelliJ
|
|
Rust](https://github.com/intellij-rust/intellij-rust) or
|
|
[RLS](https://github.com/rust-lang-nursery/rls). That being said, the
|
|
basic stuff works, and rust analyzer is developed in the rust analyzer
|
|
powered editor.
|
|
|
|
|
|
## 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 a hobby 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. Plugin 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.
|
|
|
|
## Getting in touch
|
|
|
|
@matklad can be found at Rust
|
|
[discord](https://discordapp.com/invite/rust-lang), in
|
|
#ides-and-editors.
|
|
|
|
|
|
## 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.
|