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Diffstat (limited to 'src/tools/clippy/src/docs/cast_slice_from_raw_parts.txt')
| -rw-r--r-- | src/tools/clippy/src/docs/cast_slice_from_raw_parts.txt | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/tools/clippy/src/docs/cast_slice_from_raw_parts.txt b/src/tools/clippy/src/docs/cast_slice_from_raw_parts.txt new file mode 100644 index 000000000..b58c73976 --- /dev/null +++ b/src/tools/clippy/src/docs/cast_slice_from_raw_parts.txt @@ -0,0 +1,20 @@ +### What it does +Checks for a raw slice being cast to a slice pointer + +### Why is this bad? +This can result in multiple `&mut` references to the same location when only a pointer is +required. +`ptr::slice_from_raw_parts` is a safe alternative that doesn't require +the same [safety requirements] to be upheld. + +### Example +``` +let _: *const [u8] = std::slice::from_raw_parts(ptr, len) as *const _; +let _: *mut [u8] = std::slice::from_raw_parts_mut(ptr, len) as *mut _; +``` +Use instead: +``` +let _: *const [u8] = std::ptr::slice_from_raw_parts(ptr, len); +let _: *mut [u8] = std::ptr::slice_from_raw_parts_mut(ptr, len); +``` +[safety requirements]: https://doc.rust-lang.org/std/slice/fn.from_raw_parts.html#safety
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