f34ba774c7
dont assemble shadowed impl candidates Fixes https://github.com/rust-lang/trait-system-refactor-initiative/issues/109. I've originally intended to fix this by supporting lazy reevaluation when rerunning cycles. This ended up being really difficult, see https://github.com/lcnr/search_graph for my notes used while working on this. It is also insufficient for the `rayon-hang-2.rs` test as we end up with goals which we need to rerun for all combinations of provisional results. While landing such an optimization in the future may still be desirable, it is very difficult and insufficient to fix these hangs. Also see the relevant [zulip thread](https://rust-lang.zulipchat.com/#narrow/channel/364551-t-types.2Ftrait-system-refactor/topic/rustc-rayon.20hang/near/527850058). I was previously opposed to avoiding assembling shadowed impls as it may prevent future improvements in this area, cc rust-lang/rust#141226. Going to track this and the reasoning behind it in https://github.com/rust-lang/trait-system-refactor-initiative/issues/226. r? `@BoxyUwU` `@compiler-errors`
This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.
Why Rust?
-
Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrated with other languages.
-
Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.
-
Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).
Quick Start
Read "Installation" from The Book.
Installing from Source
If you really want to install from source (though this is not recommended), see INSTALL.md.
Getting Help
See https://www.rust-lang.org/community for a list of chat platforms and forums.
Contributing
See CONTRIBUTING.md.
License
Rust is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.
See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.
Trademark
The Rust Foundation owns and protects the Rust and Cargo trademarks and logos (the "Rust Trademarks").
If you want to use these names or brands, please read the Rust language trademark policy.
Third-party logos may be subject to third-party copyrights and trademarks. See Licenses for details.