Rollup merge of #157876 - jhpratt:stabilize-box-as-ptr, r=Mark-Simulacrum

Stabilize `#![feature(box_as_ptr)]`

Tracking issue: #129090

Completed FCP: #129090 (comment)

Author: jhpratt

compiler/rustc_middle/src/lib.rs

@@ -27,10 +27,10 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
 #![allow(rustc::direct_use_of_rustc_type_ir)]
+#![cfg_attr(bootstrap, feature(box_as_ptr))]
 #![cfg_attr(doc, feature(intra_doc_pointers))]
 #![feature(allocator_api)]
 #![feature(associated_type_defaults)]
-#![feature(box_as_ptr)]
 #![feature(closure_track_caller)]
 #![feature(const_default)]
 #![feature(const_trait_impl)]

library/alloc/src/boxed.rs

@@ -1763,8 +1763,6 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     /// Due to the aliasing guarantee, the following code is legal:
     ///
     /// ```rust
-    /// #![feature(box_as_ptr)]
-    ///
     /// unsafe {
     ///     let mut b = Box::new(0);
     ///     let ptr1 = Box::as_mut_ptr(&mut b);
@@ -1778,7 +1776,7 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     ///
     /// [`as_mut_ptr`]: Self::as_mut_ptr
     /// [`as_ptr`]: Self::as_ptr
-    #[unstable(feature = "box_as_ptr", issue = "129090")]
+    #[stable(feature = "box_as_ptr", since = "CURRENT_RUSTC_VERSION")]
     #[rustc_never_returns_null_ptr]
     #[rustc_as_ptr]
     #[inline]
@@ -1809,8 +1807,6 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     /// Due to the aliasing guarantee, the following code is legal:
     ///
     /// ```rust
-    /// #![feature(box_as_ptr)]
-    ///
     /// unsafe {
     ///     let mut v = Box::new(0);
     ///     let ptr1 = Box::as_ptr(&v);
@@ -1827,7 +1823,7 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     ///
     /// [`as_mut_ptr`]: Self::as_mut_ptr
     /// [`as_ptr`]: Self::as_ptr
-    #[unstable(feature = "box_as_ptr", issue = "129090")]
+    #[stable(feature = "box_as_ptr", since = "CURRENT_RUSTC_VERSION")]
     #[rustc_never_returns_null_ptr]
     #[rustc_as_ptr]
     #[inline]

library/core/src/mem/maybe_dangling.rs

@@ -13,7 +13,6 @@ use crate::{mem, ptr};
 /// executing (particularly in concurrent code). As a somewhat absurd example, consider this code:
 ///
 /// ```rust,no_run
-/// #![feature(box_as_ptr)]
 /// # use std::alloc::{dealloc, Layout};
 /// # use std::mem;
 ///
@@ -35,7 +34,7 @@ use crate::{mem, ptr};
 ///
 // FIXME: remove `no_run` once the semantics are actually implemented
 /// ```rust,no_run
-/// #![feature(maybe_dangling, box_as_ptr)]
+/// #![feature(maybe_dangling)]
 /// # use std::alloc::{dealloc, Layout};
 /// # use std::mem::{self, MaybeDangling};
 ///

src/tools/miri/tests/genmc/fail/atomics/atomic_ptr_invalid_provenance.rs

@@ -4,7 +4,6 @@
 // We have two variants, one where we send such a pointer to GenMC, and one where we make it on the GenMC side.
 
 #![no_main]
-#![feature(box_as_ptr)]
 
 use std::sync::atomic::AtomicPtr;
 use std::sync::atomic::Ordering::*;

src/tools/miri/tests/native-lib/pass/ptr_write_access.rs

@@ -3,8 +3,6 @@
 //@[trace] compile-flags: -Zmiri-native-lib-enable-tracing
 //@compile-flags: -Zmiri-permissive-provenance
 
-#![feature(box_as_ptr)]
-
 use std::mem::MaybeUninit;
 use std::ptr;
 

src/tools/miri/tests/pass/tree_borrows/cell-inside-box.rs

@@ -1,7 +1,6 @@
 //@revisions: tree tree_implicit_writes
 //@[tree_implicit_writes]compile-flags: -Zmiri-tree-borrows-implicit-writes
 //@compile-flags: -Zmiri-tree-borrows
-#![feature(box_as_ptr)]
 #[path = "../../utils/mod.rs"]
 #[macro_use]
 mod utils;