Replace more casts with safer conversions & enable cast-related lints. #445
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I have rebased this on top of #447 and extended it to address additional Clippy feedback from that change. |
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usize and u32 both implement `From<u16>` so use u16 for the length.
josephlr
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Jun 21, 2024
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| #![deny( | ||
| clippy::cast_lossless, | ||
| clippy::cast_possible_truncation, | ||
| clippy::cast_possible_wrap, | ||
| clippy::cast_precision_loss, | ||
| clippy::cast_ptr_alignment, | ||
| clippy::cast_sign_loss, | ||
| clippy::char_lit_as_u8, | ||
| clippy::checked_conversions, | ||
| clippy::fn_to_numeric_cast, | ||
| clippy::fn_to_numeric_cast_with_truncation, | ||
| clippy::ptr_as_ptr, | ||
| clippy::unnecessary_cast, | ||
| clippy::useless_conversion | ||
| )] |
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Would it be possible to deny entire categories of lints (pedantic, correctness, complexity, etc...) rather than specific ones?
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Also, with the number of additional lints it may be better to enable them in clippy.toml.
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newpavlov
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Jun 21, 2024
| @@ -27,7 +27,9 @@ pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> { | |||
| // Prevent overflow of u32 | |||
| let chunk_size = usize::try_from(i32::MAX).expect("Windows does not support 16-bit targets"); | |||
| for chunk in dest.chunks_mut(chunk_size) { | |||
| let ret = unsafe { RtlGenRandom(chunk.as_mut_ptr().cast::<c_void>(), chunk.len() as u32) }; | |||
| #[allow(clippy::cast_possible_truncation)] | |||
| let chunk_len = chunk.len() as u32; | |||
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You can write it as chunk.len().try_into().expect("chunk size is bounded by i32::MAX"). Compiler is able to properly remove such panic.
| // The chunk can be smaller than buf's length, so we call to | ||
| // JS to create a smaller view of buf without allocation. | ||
| #[allow(clippy::cast_possible_truncation)] |
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You can use .try_into().expect("..") here same as in windows7.
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