From dc3786eb3c0b373665939763ddeac1d630f07ac8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jana=20D=C3=B6nszelmann?= <jana@donsz.nl>
Date: Fri, 14 Nov 2025 10:10:06 +0100
Subject: [PATCH] stabilize map_next_if

---
 library/core/src/iter/adapters/peekable.rs | 7 ++-----
 library/coretests/tests/lib.rs             | 1 -
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/library/core/src/iter/adapters/peekable.rs b/library/core/src/iter/adapters/peekable.rs
index ee40d2b74c647..b9bdb827209b3 100644
--- a/library/core/src/iter/adapters/peekable.rs
+++ b/library/core/src/iter/adapters/peekable.rs
@@ -337,7 +337,6 @@ impl<I: Iterator> Peekable<I> {
     ///
     /// Parse the leading decimal number from an iterator of characters.
     /// ```
-    /// #![feature(peekable_next_if_map)]
     /// let mut iter = "125 GOTO 10".chars().peekable();
     /// let mut line_num = 0_u32;
     /// while let Some(digit) = iter.next_if_map(|c| c.to_digit(10).ok_or(c)) {
@@ -349,7 +348,6 @@ impl<I: Iterator> Peekable<I> {
     ///
     /// Matching custom types.
     /// ```
-    /// #![feature(peekable_next_if_map)]
     ///
     /// #[derive(Debug, PartialEq, Eq)]
     /// enum Node {
@@ -408,7 +406,7 @@ impl<I: Iterator> Peekable<I> {
     ///#     ],
     ///# )
     /// ```
-    #[unstable(feature = "peekable_next_if_map", issue = "143702")]
+    #[stable(feature = "peekable_next_if_map", since = "CURRENT_RUSTC_VERSION")]
     pub fn next_if_map<R>(&mut self, f: impl FnOnce(I::Item) -> Result<R, I::Item>) -> Option<R> {
         let unpeek = if let Some(item) = self.next() {
             match f(item) {
@@ -437,7 +435,6 @@ impl<I: Iterator> Peekable<I> {
     ///
     /// Parse the leading decimal number from an iterator of characters.
     /// ```
-    /// #![feature(peekable_next_if_map)]
     /// let mut iter = "125 GOTO 10".chars().peekable();
     /// let mut line_num = 0_u32;
     /// while let Some(digit) = iter.next_if_map_mut(|c| c.to_digit(10)) {
@@ -446,7 +443,7 @@ impl<I: Iterator> Peekable<I> {
     /// assert_eq!(line_num, 125);
     /// assert_eq!(iter.collect::<String>(), " GOTO 10");
     /// ```
-    #[unstable(feature = "peekable_next_if_map", issue = "143702")]
+    #[stable(feature = "peekable_next_if_map", since = "CURRENT_RUSTC_VERSION")]
     pub fn next_if_map_mut<R>(&mut self, f: impl FnOnce(&mut I::Item) -> Option<R>) -> Option<R> {
         let unpeek = if let Some(mut item) = self.next() {
             match f(&mut item) {
diff --git a/library/coretests/tests/lib.rs b/library/coretests/tests/lib.rs
index 0387b442562db..222e5dd32c86d 100644
--- a/library/coretests/tests/lib.rs
+++ b/library/coretests/tests/lib.rs
@@ -91,7 +91,6 @@
 #![feature(one_sided_range)]
 #![feature(option_reduce)]
 #![feature(pattern)]
-#![feature(peekable_next_if_map)]
 #![feature(pointer_is_aligned_to)]
 #![feature(portable_simd)]
 #![feature(ptr_metadata)]