diff options
Diffstat (limited to 'src/tools/clippy/tests/ui/swap_ptr_to_ref_unfixable.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/swap_ptr_to_ref_unfixable.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/swap_ptr_to_ref_unfixable.rs b/src/tools/clippy/tests/ui/swap_ptr_to_ref_unfixable.rs new file mode 100644 index 000000000..66ea7c652 --- /dev/null +++ b/src/tools/clippy/tests/ui/swap_ptr_to_ref_unfixable.rs @@ -0,0 +1,18 @@ +#![warn(clippy::swap_ptr_to_ref)] + +macro_rules! addr_of_mut_to_ref { + ($e:expr) => { + &mut *core::ptr::addr_of_mut!($e) + }; +} + +fn main() { + let mut x = 0u32; + let y: *mut _ = &mut x; + + unsafe { + core::mem::swap(addr_of_mut_to_ref!(x), &mut *y); + core::mem::swap(&mut *y, addr_of_mut_to_ref!(x)); + core::mem::swap(addr_of_mut_to_ref!(x), addr_of_mut_to_ref!(x)); + } +} |