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Samuel Tardieu 5137bb3ceb Handle Result<T, !> and ControlFlow<!, T> as T wrt #[must_use]

There is a proposal to change the behaviour of rustc's `must_use` lint
to consider `Result<T, U>` and `ControlFlow<U, T>` as `T` when `U` is
uninhabited. See <https://github.com/rust-lang/rust/pull/148214>.

This might make the user adding extra `#[must_use]` attributes to
functions returning `Result<T, !>` or `ControlFlow<!, T>`, which would
trigger the `double_must_use` lint in Clippy without the current change.

2026-02-21 15:48:33 +01:00

src

Handle Result<T, !> and ControlFlow<!, T> as T wrt #[must_use]

2026-02-21 15:48:33 +01:00

Cargo.toml

Merge commit '9e3e9649cbae7ed33ba62ca436f43081eaaedeb5' into clippy-subtree-update

2025-12-11 19:13:34 +01:00

README.md

Remove copyright year

2026-01-05 23:28:24 +00:00

README.md

`clippy-utils`

Helpful tools for writing lints, provided as they are used in Clippy.

Usage

This crate is only guaranteed to build with this nightly toolchain:

nightly-2025-12-25

To use clippy-utils in your lint, add the following to your Cargo.toml:

clippy_utils = "0.1.XY"

XY is the version of the nightly toolchain above and can be determined with rustc +nightly-YYYY-MM-DD -V.

⚠️ Stability ⚠️

No stability guarantees are made for this crate! Use at your own risk.

Function signatures can change or be removed without replacement without any prior notice.

LICENSE

Licensed under the Apache License, Version 2.0 <https://www.apache.org/licenses/LICENSE-2.0> or the MIT license <https://opensource.org/licenses/MIT>, at your option. Files in the project may not be copied, modified, or distributed except according to those terms.