From 4c286c7f9a751a32d7fe42ca3af7ff5a70a2f8ef Mon Sep 17 00:00:00 2001
From: UserIsntAvailable <pinedap.angel@gmail.com>
Date: Fri, 3 May 2024 15:02:02 -0400
Subject: [PATCH] feat: stabilize `split_at_checked`

---
 library/core/src/lib.rs       |  1 -
 library/core/src/slice/mod.rs | 12 ++++--------
 library/core/src/str/mod.rs   |  8 ++------
 3 files changed, 6 insertions(+), 15 deletions(-)

diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
index cee3870c6292f..f8f1fc14cff4a 100644
--- a/library/core/src/lib.rs
+++ b/library/core/src/lib.rs
@@ -187,7 +187,6 @@
 #![feature(ptr_metadata)]
 #![feature(set_ptr_value)]
 #![feature(slice_ptr_get)]
-#![feature(split_at_checked)]
 #![feature(str_internals)]
 #![feature(str_split_inclusive_remainder)]
 #![feature(str_split_remainder)]
diff --git a/library/core/src/slice/mod.rs b/library/core/src/slice/mod.rs
index 6e1ba74f72b33..802ab1eca3d45 100644
--- a/library/core/src/slice/mod.rs
+++ b/library/core/src/slice/mod.rs
@@ -2051,8 +2051,6 @@ impl<T> [T] {
     /// # Examples
     ///
     /// ```
-    /// #![feature(split_at_checked)]
-    ///
     /// let v = [1, -2, 3, -4, 5, -6];
     ///
     /// {
@@ -2075,8 +2073,8 @@ impl<T> [T] {
     ///
     /// assert_eq!(None, v.split_at_checked(7));
     /// ```
-    #[unstable(feature = "split_at_checked", reason = "new API", issue = "119128")]
-    #[rustc_const_unstable(feature = "split_at_checked", issue = "119128")]
+    #[stable(feature = "split_at_checked", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "split_at_checked", since = "CURRENT_RUSTC_VERSION")]
     #[inline]
     #[must_use]
     pub const fn split_at_checked(&self, mid: usize) -> Option<(&[T], &[T])> {
@@ -2102,8 +2100,6 @@ impl<T> [T] {
     /// # Examples
     ///
     /// ```
-    /// #![feature(split_at_checked)]
-    ///
     /// let mut v = [1, 0, 3, 0, 5, 6];
     ///
     /// if let Some((left, right)) = v.split_at_mut_checked(2) {
@@ -2116,8 +2112,8 @@ impl<T> [T] {
     ///
     /// assert_eq!(None, v.split_at_mut_checked(7));
     /// ```
-    #[unstable(feature = "split_at_checked", reason = "new API", issue = "119128")]
-    #[rustc_const_unstable(feature = "split_at_checked", issue = "119128")]
+    #[stable(feature = "split_at_checked", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_unstable(feature = "const_slice_split_at_mut", issue = "101804")]
     #[inline]
     #[must_use]
     pub const fn split_at_mut_checked(&mut self, mid: usize) -> Option<(&mut [T], &mut [T])> {
diff --git a/library/core/src/str/mod.rs b/library/core/src/str/mod.rs
index 3313da9dce78c..3ca6b73c82571 100644
--- a/library/core/src/str/mod.rs
+++ b/library/core/src/str/mod.rs
@@ -721,8 +721,6 @@ impl str {
     /// # Examples
     ///
     /// ```
-    /// #![feature(split_at_checked)]
-    ///
     /// let s = "Per Martin-Löf";
     ///
     /// let (first, last) = s.split_at_checked(3).unwrap();
@@ -734,7 +732,7 @@ impl str {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "split_at_checked", reason = "new API", issue = "119128")]
+    #[stable(feature = "split_at_checked", since = "CURRENT_RUSTC_VERSION")]
     pub fn split_at_checked(&self, mid: usize) -> Option<(&str, &str)> {
         // is_char_boundary checks that the index is in [0, .len()]
         if self.is_char_boundary(mid) {
@@ -761,8 +759,6 @@ impl str {
     /// # Examples
     ///
     /// ```
-    /// #![feature(split_at_checked)]
-    ///
     /// let mut s = "Per Martin-Löf".to_string();
     /// if let Some((first, last)) = s.split_at_mut_checked(3) {
     ///     first.make_ascii_uppercase();
@@ -776,7 +772,7 @@ impl str {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "split_at_checked", reason = "new API", issue = "119128")]
+    #[stable(feature = "split_at_checked", since = "CURRENT_RUSTC_VERSION")]
     pub fn split_at_mut_checked(&mut self, mid: usize) -> Option<(&mut str, &mut str)> {
         // is_char_boundary checks that the index is in [0, .len()]
         if self.is_char_boundary(mid) {