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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/tools/clippy/tests/ui/size_of_in_element_count/functions.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/size_of_in_element_count/functions.rs | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/size_of_in_element_count/functions.rs b/src/tools/clippy/tests/ui/size_of_in_element_count/functions.rs new file mode 100644 index 000000000..09d08ac37 --- /dev/null +++ b/src/tools/clippy/tests/ui/size_of_in_element_count/functions.rs @@ -0,0 +1,46 @@ +#![warn(clippy::size_of_in_element_count)] +#![allow(clippy::ptr_offset_with_cast)] + +use std::mem::{size_of, size_of_val}; +use std::ptr::{ + copy, copy_nonoverlapping, slice_from_raw_parts, slice_from_raw_parts_mut, swap_nonoverlapping, write_bytes, +}; +use std::slice::{from_raw_parts, from_raw_parts_mut}; + +fn main() { + const SIZE: usize = 128; + const HALF_SIZE: usize = SIZE / 2; + const DOUBLE_SIZE: usize = SIZE * 2; + let mut x = [2u8; SIZE]; + let mut y = [2u8; SIZE]; + + // Count is size_of (Should trigger the lint) + unsafe { copy_nonoverlapping::<u8>(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>()) }; + unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0])) }; + + unsafe { x.as_ptr().copy_to(y.as_mut_ptr(), size_of::<u8>()) }; + unsafe { x.as_ptr().copy_to_nonoverlapping(y.as_mut_ptr(), size_of::<u8>()) }; + unsafe { y.as_mut_ptr().copy_from(x.as_ptr(), size_of::<u8>()) }; + unsafe { y.as_mut_ptr().copy_from_nonoverlapping(x.as_ptr(), size_of::<u8>()) }; + + unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>()) }; + unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0])) }; + + unsafe { y.as_mut_ptr().write_bytes(0u8, size_of::<u8>() * SIZE) }; + unsafe { write_bytes(y.as_mut_ptr(), 0u8, size_of::<u8>() * SIZE) }; + + unsafe { swap_nonoverlapping(y.as_mut_ptr(), x.as_mut_ptr(), size_of::<u8>() * SIZE) }; + + slice_from_raw_parts_mut(y.as_mut_ptr(), size_of::<u8>() * SIZE); + slice_from_raw_parts(y.as_ptr(), size_of::<u8>() * SIZE); + + unsafe { from_raw_parts_mut(y.as_mut_ptr(), size_of::<u8>() * SIZE) }; + unsafe { from_raw_parts(y.as_ptr(), size_of::<u8>() * SIZE) }; + + unsafe { y.as_mut_ptr().sub(size_of::<u8>()) }; + y.as_ptr().wrapping_sub(size_of::<u8>()); + unsafe { y.as_ptr().add(size_of::<u8>()) }; + y.as_mut_ptr().wrapping_add(size_of::<u8>()); + unsafe { y.as_ptr().offset(size_of::<u8>() as isize) }; + y.as_mut_ptr().wrapping_offset(size_of::<u8>() as isize); +} |