Rollup merge of rust-lang#84328 - Folyd:stablize_map_into_keys_values, r=m-ou-se

Stablize {HashMap,BTreeMap}::into_{keys,values}

I would propose to stabilize `{HashMap,BTreeMap}::into_{keys,values}`( aka. `map_into_keys_values`).

Closes rust-lang#75294.

Author: Dylan-DPC

library/alloc/src/collections/btree/map.rs

@@ -398,12 +398,12 @@ impl<K, V: fmt::Debug> fmt::Debug for ValuesMut<'_, K, V> {
 /// See its documentation for more.
 ///
 /// [`into_keys`]: BTreeMap::into_keys
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 pub struct IntoKeys<K, V> {
     inner: IntoIter<K, V>,
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K: fmt::Debug, V> fmt::Debug for IntoKeys<K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_list().entries(self.inner.iter().map(|(key, _)| key)).finish()
@@ -416,12 +416,12 @@ impl<K: fmt::Debug, V> fmt::Debug for IntoKeys<K, V> {
 /// See its documentation for more.
 ///
 /// [`into_values`]: BTreeMap::into_values
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 pub struct IntoValues<K, V> {
     inner: IntoIter<K, V>,
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V: fmt::Debug> fmt::Debug for IntoValues<K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_list().entries(self.inner.iter().map(|(_, val)| val)).finish()
@@ -1242,7 +1242,6 @@ impl<K, V> BTreeMap<K, V> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_into_keys_values)]
     /// use std::collections::BTreeMap;
     ///
     /// let mut a = BTreeMap::new();
@@ -1253,7 +1252,7 @@ impl<K, V> BTreeMap<K, V> {
     /// assert_eq!(keys, [1, 2]);
     /// ```
     #[inline]
-    #[unstable(feature = "map_into_keys_values", issue = "75294")]
+    #[stable(feature = "map_into_keys_values", since = "1.54.0")]
     pub fn into_keys(self) -> IntoKeys<K, V> {
         IntoKeys { inner: self.into_iter() }
     }
@@ -1265,7 +1264,6 @@ impl<K, V> BTreeMap<K, V> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_into_keys_values)]
     /// use std::collections::BTreeMap;
     ///
     /// let mut a = BTreeMap::new();
@@ -1276,7 +1274,7 @@ impl<K, V> BTreeMap<K, V> {
     /// assert_eq!(values, ["hello", "goodbye"]);
     /// ```
     #[inline]
-    #[unstable(feature = "map_into_keys_values", issue = "75294")]
+    #[stable(feature = "map_into_keys_values", since = "1.54.0")]
     pub fn into_values(self) -> IntoValues<K, V> {
         IntoValues { inner: self.into_iter() }
     }
@@ -1776,7 +1774,7 @@ impl<'a, K, V> Range<'a, K, V> {
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> Iterator for IntoKeys<K, V> {
     type Item = K;
 
@@ -1801,24 +1799,24 @@ impl<K, V> Iterator for IntoKeys<K, V> {
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> DoubleEndedIterator for IntoKeys<K, V> {
     fn next_back(&mut self) -> Option<K> {
         self.inner.next_back().map(|(k, _)| k)
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> ExactSizeIterator for IntoKeys<K, V> {
     fn len(&self) -> usize {
         self.inner.len()
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> FusedIterator for IntoKeys<K, V> {}
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> Iterator for IntoValues<K, V> {
     type Item = V;
 
@@ -1835,21 +1833,21 @@ impl<K, V> Iterator for IntoValues<K, V> {
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> DoubleEndedIterator for IntoValues<K, V> {
     fn next_back(&mut self) -> Option<V> {
         self.inner.next_back().map(|(_, v)| v)
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> ExactSizeIterator for IntoValues<K, V> {
     fn len(&self) -> usize {
         self.inner.len()
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> FusedIterator for IntoValues<K, V> {}
 
 #[stable(feature = "btree_range", since = "1.17.0")]

library/std/src/collections/hash/map.rs

@@ -962,7 +962,6 @@ where
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_into_keys_values)]
     /// use std::collections::HashMap;
     ///
     /// let mut map = HashMap::new();
@@ -973,7 +972,7 @@ where
     /// let vec: Vec<&str> = map.into_keys().collect();
     /// ```
     #[inline]
-    #[unstable(feature = "map_into_keys_values", issue = "75294")]
+    #[stable(feature = "map_into_keys_values", since = "1.54.0")]
     pub fn into_keys(self) -> IntoKeys<K, V> {
         IntoKeys { inner: self.into_iter() }
     }
@@ -985,7 +984,6 @@ where
     /// # Examples
     ///
     /// ```
-    /// #![feature(map_into_keys_values)]
     /// use std::collections::HashMap;
     ///
     /// let mut map = HashMap::new();
@@ -996,7 +994,7 @@ where
     /// let vec: Vec<i32> = map.into_values().collect();
     /// ```
     #[inline]
-    #[unstable(feature = "map_into_keys_values", issue = "75294")]
+    #[stable(feature = "map_into_keys_values", since = "1.54.0")]
     pub fn into_values(self) -> IntoValues<K, V> {
         IntoValues { inner: self.into_iter() }
     }
@@ -1405,15 +1403,13 @@ pub struct ValuesMut<'a, K: 'a, V: 'a> {
 /// # Example
 ///
 /// ```
-/// #![feature(map_into_keys_values)]
-///
 /// use std::collections::HashMap;
 ///
 /// let mut map = HashMap::new();
 /// map.insert("a", 1);
 /// let iter_keys = map.into_keys();
 /// ```
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 pub struct IntoKeys<K, V> {
     inner: IntoIter<K, V>,
 }
@@ -1428,15 +1424,13 @@ pub struct IntoKeys<K, V> {
 /// # Example
 ///
 /// ```
-/// #![feature(map_into_keys_values)]
-///
 /// use std::collections::HashMap;
 ///
 /// let mut map = HashMap::new();
 /// map.insert("a", 1);
 /// let iter_keys = map.into_values();
 /// ```
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 pub struct IntoValues<K, V> {
     inner: IntoIter<K, V>,
 }
@@ -2137,7 +2131,7 @@ impl<K, V: fmt::Debug> fmt::Debug for ValuesMut<'_, K, V> {
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> Iterator for IntoKeys<K, V> {
     type Item = K;
 
@@ -2150,24 +2144,24 @@ impl<K, V> Iterator for IntoKeys<K, V> {
         self.inner.size_hint()
     }
 }
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> ExactSizeIterator for IntoKeys<K, V> {
     #[inline]
     fn len(&self) -> usize {
         self.inner.len()
     }
 }
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> FusedIterator for IntoKeys<K, V> {}
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K: Debug, V> fmt::Debug for IntoKeys<K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_list().entries(self.inner.iter().map(|(k, _)| k)).finish()
     }
 }
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> Iterator for IntoValues<K, V> {
     type Item = V;
 
@@ -2180,17 +2174,17 @@ impl<K, V> Iterator for IntoValues<K, V> {
         self.inner.size_hint()
     }
 }
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> ExactSizeIterator for IntoValues<K, V> {
     #[inline]
     fn len(&self) -> usize {
         self.inner.len()
     }
 }
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V> FusedIterator for IntoValues<K, V> {}
 
-#[unstable(feature = "map_into_keys_values", issue = "75294")]
+#[stable(feature = "map_into_keys_values", since = "1.54.0")]
 impl<K, V: Debug> fmt::Debug for IntoValues<K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_list().entries(self.inner.iter().map(|(_, v)| v)).finish()