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changelog: [`useless-nonzero-new_unchecked`]: new lint Close #13991 ### What it does Checks for `NonZero*::new_unchecked(<literal>)` being used in a `const` context. ### Why is this bad? Using `NonZero*::new_unchecked()` is an `unsafe` function and requires an `unsafe` context. When used with an integer literal in a `const` context, `NonZero*::new().unwrap()` will provide the same result with identical runtime performances while not requiring `unsafe`. ### Example ```no_run const PLAYERS: NonZeroUsize = unsafe { NonZeroUsize::new_unchecked(3) }; ``` Use instead: ```no_run const PLAYERS: NonZeroUsize = NonZeroUsize::new(3).unwrap(); ``` |
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| 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-2025-01-09
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
Copyright 2014-2024 The Rust Project Developers
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.