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cbfe1f5f58
`ptr_eq` was recently enhanced to lint on more cases of raw pointers comparison: - lint on all raw pointer comparison, by proposing to use `[core|std]::ptr::eq(lhs, rhs)` instead of `lhs == rhs`; - removing one symetric `as usize` on each size if needed - peeling any level of `as *[const|mut] _` if the remaining expression can still be coerced into the original one (i.e., is a ref or raw pointer to the same type as before) The current change restricts the lint to the cases where at least one level of symetric `as usize`, or any conversion to a raw pointer, could be removed. For example, a direct comparaison of two raw pointers will not trigger the lint anymore.
58 lines
1.2 KiB
Rust
58 lines
1.2 KiB
Rust
#![warn(clippy::ptr_eq)]
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#![no_std]
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#![feature(lang_items)]
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use core::panic::PanicInfo;
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#[lang = "eh_personality"]
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extern "C" fn eh_personality() {}
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#[panic_handler]
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fn panic(info: &PanicInfo) -> ! {
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loop {}
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}
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macro_rules! mac {
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($a:expr, $b:expr) => {
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$a as *const _ as usize == $b as *const _ as usize
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};
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}
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macro_rules! another_mac {
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($a:expr, $b:expr) => {
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$a as *const _ == $b as *const _
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};
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}
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fn main() {
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let a = &[1, 2, 3];
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let b = &[1, 2, 3];
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let _ = core::ptr::eq(a, b);
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//~^ ptr_eq
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let _ = core::ptr::eq(a, b);
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//~^ ptr_eq
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// Do not lint: the rhs conversion is needed
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let _ = a.as_ptr() == b as *const _;
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// Do not lint: we have two raw pointers already
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let _ = a.as_ptr() == b.as_ptr();
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// Do not lint
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let _ = mac!(a, b);
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let _ = another_mac!(a, b);
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let a = &mut [1, 2, 3];
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let b = &mut [1, 2, 3];
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// Do not lint: the rhs conversion is needed
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let _ = a.as_mut_ptr() == b as *mut [i32] as *mut _;
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// Do not lint: we have two raw pointers already
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let _ = a.as_mut_ptr() == b.as_mut_ptr();
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let _ = a == b;
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let _ = core::ptr::eq(a, b);
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}
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