Fix inplace_iteration related impls

Author: slerpyyy

library/core/src/iter/adapters/dedup.rs

@@ -1,3 +1,5 @@
+#![unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
+
 use crate::iter::{InPlaceIterable, SourceIter};
 
 /// A wrapper type around a key function.
@@ -9,7 +11,6 @@ use crate::iter::{InPlaceIterable, SourceIter};
 /// See its documentation for more.
 ///
 /// [`Iterator::dedup_by_key`]: Iterator::dedup_by_key
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 #[derive(Debug, Clone, Copy)]
 pub struct ByKey<F> {
     key: F,
@@ -22,7 +23,6 @@ impl<F> ByKey<F> {
     }
 }
 
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 impl<F, T, K> FnOnce<(&T, &T)> for ByKey<F>
 where
     F: FnMut(&T) -> K,
@@ -35,7 +35,6 @@ where
     }
 }
 
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 impl<F, T, K> FnMut<(&T, &T)> for ByKey<F>
 where
     F: FnMut(&T) -> K,
@@ -56,7 +55,6 @@ where
 /// See its documentation for more.
 ///
 /// [`Iterator::dedup`]: Iterator::dedup
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 #[derive(Debug, Clone, Copy)]
 #[non_exhaustive]
 pub struct ByPartialEq;
@@ -68,7 +66,6 @@ impl ByPartialEq {
     }
 }
 
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 impl<T: PartialEq> FnOnce<(&T, &T)> for ByPartialEq {
     type Output = bool;
     #[inline]
@@ -77,7 +74,6 @@ impl<T: PartialEq> FnOnce<(&T, &T)> for ByPartialEq {
     }
 }
 
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 impl<T: PartialEq> FnMut<(&T, &T)> for ByPartialEq {
     #[inline]
     extern "rust-call" fn call_mut(&mut self, args: (&T, &T)) -> Self::Output {
@@ -94,7 +90,6 @@ impl<T: PartialEq> FnMut<(&T, &T)> for ByPartialEq {
 /// [`Iterator::dedup`]: Iterator::dedup
 /// [`Iterator::dedup_by`]: Iterator::dedup_by
 /// [`Iterator::dedup_by_key`]: Iterator::dedup_by_key
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 #[derive(Debug, Clone)]
 pub struct Dedup<I, F>
 where
@@ -115,7 +110,6 @@ where
     }
 }
 
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
 impl<I, F> Iterator for Dedup<I, F>
 where
     I: Iterator,
@@ -140,22 +134,21 @@ where
     }
 }
 
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
-unsafe impl<S, I, F> SourceIter for Dedup<I, F>
+#[unstable(issue = "none", feature = "inplace_iteration")]
+unsafe impl<I, F> SourceIter for Dedup<I, F>
 where
-    S: Iterator,
-    I: Iterator + SourceIter<Source = S>,
+    I: SourceIter + Iterator,
 {
-    type Source = S;
+    type Source = I::Source;
 
     #[inline]
-    unsafe fn as_inner(&mut self) -> &mut Self::Source {
+    unsafe fn as_inner(&mut self) -> &mut I::Source {
         // SAFETY: unsafe function forwarding to unsafe function with the same requirements
         unsafe { SourceIter::as_inner(&mut self.inner) }
     }
 }
 
-#[unstable(feature = "iter_dedup", reason = "recently added", issue = "83748")]
+#[unstable(issue = "none", feature = "inplace_iteration")]
 unsafe impl<I, F> InPlaceIterable for Dedup<I, F>
 where
     I: InPlaceIterable,

library/core/src/iter/traits/iterator.rs

@@ -1690,8 +1690,8 @@ pub trait Iterator {
         Inspect::new(self, f)
     }
 
-    /// Removes all but the first of consecutive elements in the iterator according to the
-    /// [`PartialEq`] trait implementation.
+    /// Removes all but the first of consecutive repeated elements in the iterator
+    /// according to the [`PartialEq`] trait implementation.
     ///
     /// For an iterator yielding infinitely many consecutive duplicates,
     /// this may result in an infinite loop.
@@ -1734,11 +1734,11 @@ pub trait Iterator {
         Dedup::new(self, ByPartialEq::new())
     }
 
-    /// Removes all but the first of consecutive elements in the iterator satisfying a given equality
-    /// relation.
+    /// Removes all but the first of consecutive elements in the iterator
+    /// satisfying a given equality relation.
     ///
-    /// The `same_bucket` function is passed a references to two elements from the iterator and
-    /// must determine if the elements compare equal.
+    /// The `same_bucket` function is passed a references to two elements from
+    /// the iterator and must determine if the elements compare equal.
     ///
     /// For an iterator yielding infinitely many consecutive duplicates,
     /// this may result in an infinite loop.
@@ -1781,8 +1781,8 @@ pub trait Iterator {
         Dedup::new(self, same_bucket)
     }
 
-    /// Removes all but the first of consecutive elements in the iterator that
-    /// resolve to the same key.
+    /// Removes all but the first of consecutive elements in the iterator
+    /// that resolve to the same key.
     ///
     /// For an iterator yielding infinitely many consecutive duplicates,
     /// this may result in an infinite loop.