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bors 7449f9fa10 Auto merge of #13894 - lowr:patch/fallback-before-final-obligation-resolution, r=lnicola 
Apply fallback before final obligation resolution

Fixes #13249
Fixes #13518

We've been applying fallback to type variables independently even when there are some unresolved obligations that associate them. This PR applies fallback to unresolved scalar type variables before the final attempt of resolving obligations, which enables us to infer more.

Unlike rustc, which has separate storages for each kind of type variables, we currently don't have a way to retrieve only integer/float type variables without folding/visiting every single type we've inferred. I've repurposed `TypeVariableData` as bitflags that also hold the kind of the type variable it's referring to so that we can "reconstruct" scalar type variables from their indices.

This PR increases the number of ??ty for rust-analyzer repo not because we regress and fail to infer the existing code but because we fail to infer the new code. It seems we have problems inferring some functions bitflags produces.
2023-01-07 19:03:34 +00:00
.cargo Add CARGO_WORKSPACE_DIR env var in .cargo/config.toml 2022-07-19 13:02:16 +02:00
.github ⬆️ rust-analyzer 2022-11-09 21:49:10 +02:00
.vscode ⬆️ rust-analyzer 2022-08-16 11:24:50 +03:00
assets Automatically change text color in logo based on dark mode 2022-03-06 23:06:53 +11:00
bench_data avoid a &str to String conversion 2022-08-17 04:58:26 +09:00
crates Auto merge of #13894 - lowr:patch/fallback-before-final-obligation-resolution, r=lnicola 2023-01-07 19:03:34 +00:00
docs Auto merge of #13832 - Veykril:discriminant-hints, r=Veykril 2023-01-02 13:20:33 +00:00
editors/code Use ZWNJ to prevent VSCode from forming ligatures between hints and code 2023-01-03 12:32:38 +01:00
lib Inline all format arguments where possible 2022-12-24 14:36:10 -05:00
xtask Moar linting: needless_borrow, let_unit_value, ... 2022-12-25 05:07:47 -05:00
.editorconfig prettier config 2022-05-17 18:12:49 +01:00
.git-blame-ignore-revs add prettier format commit to ignored revisions 2022-05-17 18:15:51 +01:00
.gitattributes Fix .gitattributes for test_data 2022-07-24 14:05:35 +02:00
.gitignore
Cargo.lock Store diverging flag for type variables as bitflags 2023-01-05 23:10:00 +09:00
Cargo.toml ⬆️ rust-analyzer 2022-10-18 09:12:49 +03:00
LICENSE-APACHE
LICENSE-MIT
PRIVACY.md Update privacy note 2021-12-23 14:04:15 +02:00
README.md ⬆️ rust-analyzer 2022-08-09 07:23:57 +03:00
rustfmt.toml
triagebot.toml ⬆️ rust-analyzer 2022-11-09 21:49:10 +02:00

README.md

rust-analyzer logo

rust-analyzer is a 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.

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.

Security and Privacy

See the corresponding sections of the manual.

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 rust-analyzer working group on Zulip:

https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer

Quick Links

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.