If a label is placed on the block of a loop instead of the header, suggest moving it to the header. Fixes #138585 If a label is placed on the block of a loop instead of the header, suggest to the user moving it to the loop header instead of ~~suggesting to remove it~~ emitting a tool-only suggestion to remove it. ```rs fn main() { loop 'a: { return; } } ``` ```diff error: block label not supported here --> src/main.rs:2:10 | 2 | loop 'a: { return; } | ^^^ not supported here + | +help: if you meant to label the loop, move this label before the loop + | +2 - loop 'a: { return; } +2 + 'a: loop { return; } + | ``` Questions for reviewer: * The "desired output" in the linked issue had the main diagnostic be "misplaced loop label". Should the main diagnostic message the changed instead of leaving it as "block label not supported here"? * Should this be `Applicability::MachineApplicable`? |
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This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.
Why Rust?
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Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrated with other languages.
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Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.
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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
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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.
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If you want to use these names or brands, please read the Rust language trademark policy.
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