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Rollup merge of #117968 - Urgau:stabilize-ptr-addr-eq, r=dtolnay

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Stabilize `ptr::addr_eq`

This PR stabilize the `ptr_addr_eq` library feature, representing:

```rust
// core::ptr

pub fn addr_eq<T: ?Sized, U: ?Sized>(p: *const T, q: *const U) -> bool;
```

FCP has already started [on the tracking issue](https://github.com/rust-lang/rust/issues/116324#issuecomment-1813008697) and is waiting on the final period comment.

Note: stabilizing this feature is somewhat of requirement for a new T-lang lint, cf. https://github.com/rust-lang/rust/pull/117758#issuecomment-1813183686.
This commit is contained in:
Michael Goulet 2023-11-25 17:23:33 -05:00 • committed by GitHub
commit fcb9fcc28c
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2 changed files with 5 additions and 5 deletions
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1
library/alloc/src/lib.rs
View file

@ -140,7 +140,6 @@
#![feature(maybe_uninit_uninit_array)]
#![feature(maybe_uninit_uninit_array_transpose)]
#![feature(pattern)]
#![feature(ptr_addr_eq)]
#![feature(ptr_internals)]
#![feature(ptr_metadata)]
#![feature(ptr_sub_ptr)]

9
library/core/src/ptr/mod.rs
View file

@ -1898,14 +1898,15 @@ pub fn eq<T: ?Sized>(a: *const T, b: *const T) -> bool {
/// # Examples
///
/// ```
/// #![feature(ptr_addr_eq)]
/// use std::ptr;
///
/// let whole: &[i32; 3] = &[1, 2, 3];
/// let first: &i32 = &whole[0];
/// assert!(std::ptr::addr_eq(whole, first));
/// assert!(!std::ptr::eq::<dyn std::fmt::Debug>(whole, first));
///
/// assert!(ptr::addr_eq(whole, first));
/// assert!(!ptr::eq::<dyn std::fmt::Debug>(whole, first));
/// ```
#[unstable(feature = "ptr_addr_eq", issue = "116324")]
#[stable(feature = "ptr_addr_eq", since = "CURRENT_RUSTC_VERSION")]
#[inline(always)]
#[must_use = "pointer comparison produces a value"]
pub fn addr_eq<T: ?Sized, U: ?Sized>(p: *const T, q: *const U) -> bool {