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bors 817a6a8609 Auto merge of #12966 - OleStrohm:master, r=Veykril 
feat: Display the value of enum variant on hover

fixes #12955

This PR adds const eval support for enums, as well as showing their value on hover, just as consts currently have.

I developed these two things at the same time, but I've realized now that they are separate. However since the hover is just a 10 line change (not including tests), I figured I may as well put them in the same PR. Though if you want them split up into "enum const eval support"  and "show enum variant value on hover", I think that's reasonable too.

Since this adds const eval support for enums this also allows consts that reference enums to have their values computed now too.

The const evaluation itself is quite rudimentary, it doesn't keep track of the actual type of the enum, but it turns out that Rust doesn't actually either, and `E::A as u8` is valid regardless of the `repr` on `E`.

It also doesn't really care about what expression the enum variant contains, it could for example be a string, despite that not being allowed, but I guess it's up to the `cargo check` diagnostics to inform of such issues anyway?
2022-09-20 14:01:16 +00:00
.cargo Add CARGO_WORKSPACE_DIR env var in .cargo/config.toml 2022-07-19 13:02:16 +02:00
.github use rustup minimal profile and add curl retries 2022-09-10 23:43:33 -07:00
.vscode Take into account renamed extension id when launching 2022-08-12 18:06:58 +02:00
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crates Auto merge of #12966 - OleStrohm:master, r=Veykril 2022-09-20 14:01:16 +00:00
docs Simplify 2022-09-19 17:31:08 +02:00
editors/code Simplify 2022-09-19 17:31:08 +02:00
lib Lift out the module scope into a field in the Resolver 2022-09-02 17:02:12 +02:00
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.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
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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.