Rollup merge of #103522 - Dylan-DPC:76118/array-methods-stab, r=dtolnay

stabilise array methods

Closes #76118

Stabilises the remaining array methods

FCP is yet to be carried out for this

There wasn't a clear consensus on the naming, but all the other alternatives had some flaws as discussed in the tracking issue and there was a silence on this issue for a year

library/alloc/src/lib.rs

@@ -103,7 +103,6 @@
 #![feature(allocator_api)]
 #![feature(array_chunks)]
 #![feature(array_into_iter_constructors)]
-#![feature(array_methods)]
 #![feature(array_windows)]
 #![feature(ascii_char)]
 #![feature(assert_matches)]

library/core/src/array/mod.rs

@@ -559,8 +559,6 @@ impl<T, const N: usize> [T; N] {
     /// # Example
     ///
     /// ```
-    /// #![feature(array_methods)]
-    ///
     /// let floats = [3.1, 2.7, -1.0];
     /// let float_refs: [&f64; 3] = floats.each_ref();
     /// assert_eq!(float_refs, [&3.1, &2.7, &-1.0]);
@@ -571,16 +569,14 @@ impl<T, const N: usize> [T; N] {
     /// array if its elements are not [`Copy`].
     ///
     /// ```
-    /// #![feature(array_methods)]
-    ///
     /// let strings = ["Ferris".to_string(), "♥".to_string(), "Rust".to_string()];
     /// let is_ascii = strings.each_ref().map(|s| s.is_ascii());
     /// assert_eq!(is_ascii, [true, false, true]);
     ///
     /// // We can still access the original array: it has not been moved.
     /// assert_eq!(strings.len(), 3);
     /// ```
-    #[unstable(feature = "array_methods", issue = "76118")]
+    #[stable(feature = "array_methods", since = "CURRENT_RUSTC_VERSION")]
     pub fn each_ref(&self) -> [&T; N] {
         from_trusted_iterator(self.iter())
     }
@@ -592,15 +588,14 @@ impl<T, const N: usize> [T; N] {
     /// # Example
     ///
     /// ```
-    /// #![feature(array_methods)]
     ///
     /// let mut floats = [3.1, 2.7, -1.0];
     /// let float_refs: [&mut f64; 3] = floats.each_mut();
     /// *float_refs[0] = 0.0;
     /// assert_eq!(float_refs, [&mut 0.0, &mut 2.7, &mut -1.0]);
     /// assert_eq!(floats, [0.0, 2.7, -1.0]);
     /// ```
-    #[unstable(feature = "array_methods", issue = "76118")]
+    #[stable(feature = "array_methods", since = "CURRENT_RUSTC_VERSION")]
     pub fn each_mut(&mut self) -> [&mut T; N] {
         from_trusted_iterator(self.iter_mut())
     }

library/core/tests/lib.rs

@@ -1,6 +1,5 @@
 #![feature(alloc_layout_extra)]
 #![feature(array_chunks)]
-#![feature(array_methods)]
 #![feature(array_windows)]
 #![feature(ascii_char)]
 #![feature(ascii_char_variants)]

src/librustdoc/lib.rs

@@ -3,7 +3,6 @@
     html_playground_url = "https://play.rust-lang.org/"
 )]
 #![feature(rustc_private)]
-#![feature(array_methods)]
 #![feature(assert_matches)]
 #![feature(box_patterns)]
 #![feature(if_let_guard)]