diff options
Diffstat (limited to 'src/tools/clippy/tests/ui/vtable_address_comparisons.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/vtable_address_comparisons.rs | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/vtable_address_comparisons.rs b/src/tools/clippy/tests/ui/vtable_address_comparisons.rs new file mode 100644 index 000000000..a9a4a0f5a --- /dev/null +++ b/src/tools/clippy/tests/ui/vtable_address_comparisons.rs @@ -0,0 +1,44 @@ +use std::fmt::Debug; +use std::ptr; +use std::rc::Rc; +use std::sync::Arc; + +#[warn(clippy::vtable_address_comparisons)] +#[allow(clippy::borrow_as_ptr)] + +fn main() { + let a: *const dyn Debug = &1 as &dyn Debug; + let b: *const dyn Debug = &1 as &dyn Debug; + + // These should fail: + let _ = a == b; + let _ = a != b; + let _ = a < b; + let _ = a <= b; + let _ = a > b; + let _ = a >= b; + ptr::eq(a, b); + + let a = &1 as &dyn Debug; + let b = &1 as &dyn Debug; + ptr::eq(a, b); + + let a: Rc<dyn Debug> = Rc::new(1); + Rc::ptr_eq(&a, &a); + + let a: Arc<dyn Debug> = Arc::new(1); + Arc::ptr_eq(&a, &a); + + // These should be fine: + let a = &1; + ptr::eq(a, a); + + let a = Rc::new(1); + Rc::ptr_eq(&a, &a); + + let a = Arc::new(1); + Arc::ptr_eq(&a, &a); + + let a: &[u8] = b""; + ptr::eq(a, a); +} |