Rollup merge of #97506 - JohnTitor:stabilize-nonnull-slice-from-raw-parts, r=m-ou-se,the8472

Stabilize `nonnull_slice_from_raw_parts`

FCP is done: https://github.com/rust-lang/rust/issues/71941#issuecomment-1100910416
Note that this doesn't const-stabilize `NonNull::slice_from_raw_parts` as `slice_from_raw_parts_mut` isn't const-stabilized yet. Given #67456 and #57349, it's not likely available soon, meanwhile, stabilizing only the feature makes some sense, I think.

Closes #71941

library/alloc/src/lib.rs

@@ -135,7 +135,6 @@
 #![feature(maybe_uninit_uninit_array)]
 #![feature(maybe_uninit_uninit_array_transpose)]
 #![cfg_attr(test, feature(new_uninit))]
-#![feature(nonnull_slice_from_raw_parts)]
 #![feature(pattern)]
 #![feature(pointer_byte_offsets)]
 #![feature(provide_any)]

library/alloc/tests/lib.rs

@@ -8,7 +8,7 @@
 #![feature(const_cow_is_borrowed)]
 #![feature(const_heap)]
 #![feature(const_mut_refs)]
-#![feature(const_nonnull_slice_from_raw_parts)]
+#![feature(const_slice_from_raw_parts_mut)]
 #![feature(const_ptr_write)]
 #![feature(const_try)]
 #![feature(core_intrinsics)]
@@ -38,7 +38,6 @@
 #![feature(const_default_impls)]
 #![feature(const_trait_impl)]
 #![feature(const_str_from_utf8)]
-#![feature(nonnull_slice_from_raw_parts)]
 #![feature(panic_update_hook)]
 #![feature(pointer_is_aligned)]
 #![feature(slice_flatten)]

library/core/src/ptr/non_null.rs

@@ -462,8 +462,6 @@ impl<T> NonNull<[T]> {
     /// # Examples
     ///
     /// ```rust
-    /// #![feature(nonnull_slice_from_raw_parts)]
-    ///
     /// use std::ptr::NonNull;
     ///
     /// // create a slice pointer when starting out with a pointer to the first element
@@ -475,8 +473,8 @@ impl<T> NonNull<[T]> {
     ///
     /// (Note that this example artificially demonstrates a use of this method,
     /// but `let slice = NonNull::from(&x[..]);` would be a better way to write code like this.)
-    #[unstable(feature = "nonnull_slice_from_raw_parts", issue = "71941")]
-    #[rustc_const_unstable(feature = "const_nonnull_slice_from_raw_parts", issue = "71941")]
+    #[stable(feature = "nonnull_slice_from_raw_parts", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_unstable(feature = "const_slice_from_raw_parts_mut", issue = "67456")]
     #[must_use]
     #[inline]
     pub const fn slice_from_raw_parts(data: NonNull<T>, len: usize) -> Self {
@@ -494,7 +492,6 @@ impl<T> NonNull<[T]> {
     /// # Examples
     ///
     /// ```rust
-    /// #![feature(nonnull_slice_from_raw_parts)]
     /// use std::ptr::NonNull;
     ///
     /// let slice: NonNull<[i8]> = NonNull::slice_from_raw_parts(NonNull::dangling(), 3);
@@ -514,7 +511,7 @@ impl<T> NonNull<[T]> {
     /// # Examples
     ///
     /// ```rust
-    /// #![feature(slice_ptr_get, nonnull_slice_from_raw_parts)]
+    /// #![feature(slice_ptr_get)]
     /// use std::ptr::NonNull;
     ///
     /// let slice: NonNull<[i8]> = NonNull::slice_from_raw_parts(NonNull::dangling(), 3);
@@ -534,7 +531,7 @@ impl<T> NonNull<[T]> {
     /// # Examples
     ///
     /// ```rust
-    /// #![feature(slice_ptr_get, nonnull_slice_from_raw_parts)]
+    /// #![feature(slice_ptr_get)]
     /// use std::ptr::NonNull;
     ///
     /// let slice: NonNull<[i8]> = NonNull::slice_from_raw_parts(NonNull::dangling(), 3);
@@ -668,7 +665,7 @@ impl<T> NonNull<[T]> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(slice_ptr_get, nonnull_slice_from_raw_parts)]
+    /// #![feature(slice_ptr_get)]
     /// use std::ptr::NonNull;
     ///
     /// let x = &mut [1, 2, 4];

library/std/src/lib.rs

@@ -292,7 +292,6 @@
 #![feature(is_some_and)]
 #![feature(maybe_uninit_slice)]
 #![feature(maybe_uninit_write_slice)]
-#![feature(nonnull_slice_from_raw_parts)]
 #![feature(panic_can_unwind)]
 #![feature(panic_info_message)]
 #![feature(panic_internals)]