c518fe7f6c
6130: Items case quick fix (snake_case / UPPER_SNAKE_CASE / CamelCase) r=matklad a=popzxc Resolves #4598. After a third try, it finally works. Boy, it appeared tougher than it seemed. Initially I thought like "Ha, `rustc` already tells us where idents are named incorrectly. It shouldn't be that hard, should it?". Well, the problems with the information provided by `rustc` appeared shortly: - `rustc` warnings are `flycheck` warnings, which are slightly aside from our diagnostics with fixes. When we map flycheck diagnostic to LSP, we can convert it into a fix, but only if it's marked as `Applicability::MachineApplicable`. Name case fix is marked `Applicability::MaybeIncorrect`, and for a reason: it only suggest to rename symbol under cursor, without tracking any references. - Warning spawned by `rustc` are identified by string labels rather than enum. It means that if one day the diagnostic will be renamed in `rustc`, `rust-analyzer` code will still compile, but won't find the required diagnostic by name anymore. If by chance this will happen when some unlucky guy will decide to create their first pull request, they'll be confused by suddenly failing tests (likely) not related to their changes. - Even if we'll try to build fixes atop of `rustc` warnings, we'll have to do it in the `rust_analyzer::diagnostics::to_proto` module, which is far less convenient for that matter than `ide` crate. That's why I decided that it's worth a separate `rust-analyzer` diagnostic, which will implement `DiagnosticWithFix` trait. After that, I discovered that currently `hir_ty::diagnostics` only check `DefWithBody` types, like function bodies. I had to add support for diagnostics which look at any `ModuleDef`. And of course, since I'd added a lot of new functionality, it required extensive testing. That explains why the diff is so big for a (looking) relatively small feature. I hope that this PR doesn't only add a small feature, but also creates a base for building another features. ## Example:  P.S. My eyes were bleeding when I had to write the code for the example... 6135: when generating new function, focus on return type instead of body r=matklad a=bnjjj I made a little change when we use the assist to generate a new function, instead of focusing on the function body, it will focus on return type Co-authored-by: Igor Aleksanov <popzxc@yandex.ru> Co-authored-by: Benjamin Coenen <5719034+bnjjj@users.noreply.github.com>
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.
Work on rust-analyzer is sponsored by
Quick Start
https://rust-analyzer.github.io/manual.html#installation
Documentation
If you want to contribute to rust-analyzer or are just curious about how things work under the hood, check the ./docs/dev folder.
If you want to use rust-analyzer's language server with your editor of choice, check the manual folder. It also contains some tips & tricks to help you be more productive when using rust-analyzer.
Communication
For usage and troubleshooting requests, please use "IDEs and Editors" category of the Rust forum:
https://users.rust-lang.org/c/ide/14
For questions about development and implementation, join rls-2.0 working group on Zulip:
https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frls-2.2E0
Quick Links
- Website: https://rust-analyzer.github.io/
- Metrics: https://rust-analyzer.github.io/metrics/
- API docs: https://rust-analyzer.github.io/rust-analyzer/ide/
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.