rust/tests/ui/ptr_eq.rs
Bruno BELANYI 5bad9175fb New lint: Recommend using ptr::eq when possible
This is based almost entirely on the code available in the previous PR #4596.
2020-10-07 11:48:06 +02:00

39 lines
803 B
Rust

// run-rustfix
#![warn(clippy::ptr_eq)]
macro_rules! mac {
($a:expr, $b:expr) => {
$a as *const _ as usize == $b as *const _ as usize
};
}
macro_rules! another_mac {
($a:expr, $b:expr) => {
$a as *const _ == $b as *const _
};
}
fn main() {
let a = &[1, 2, 3];
let b = &[1, 2, 3];
let _ = a as *const _ as usize == b as *const _ as usize;
let _ = a as *const _ == b as *const _;
let _ = a.as_ptr() == b as *const _;
let _ = a.as_ptr() == b.as_ptr();
// Do not lint
let _ = mac!(a, b);
let _ = another_mac!(a, b);
let a = &mut [1, 2, 3];
let b = &mut [1, 2, 3];
let _ = a.as_mut_ptr() == b as *mut [i32] as *mut _;
let _ = a.as_mut_ptr() == b.as_mut_ptr();
let _ = a == b;
let _ = core::ptr::eq(a, b);
}