53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
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;
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
let _ = a != b;
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
let _ = a < b;
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
let _ = a <= b;
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
let _ = a > b;
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
let _ = a >= b;
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
ptr::eq(a, b);
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
|
|
let a = &1 as &dyn Debug;
|
|
let b = &1 as &dyn Debug;
|
|
ptr::eq(a, b);
|
|
//~^ ERROR: comparing trait object pointers compares a non-unique vtable address
|
|
|
|
// 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: Rc<dyn Debug> = Rc::new(1);
|
|
Rc::ptr_eq(&a, &a);
|
|
|
|
let a: Arc<dyn Debug> = Arc::new(1);
|
|
Arc::ptr_eq(&a, &a);
|
|
|
|
let a: &[u8] = b"";
|
|
ptr::eq(a, a);
|
|
}
|