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Rollup merge of #88789 - the8472:rm-zip-bound, r=JohnTitor

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remove unnecessary bound on Zip specialization impl

I originally added this bound in an attempt to make the specialization
sound for owning iterators but it was never correct here and the correct
and [already implemented](https://github.com/rust-lang/rust/blob/497ee321af3b8496eaccd7af7b437f18bab81abf/library/alloc/src/vec/into_iter.rs#L220-L232) solution is is to place it on the IntoIter
implementation.
This commit is contained in:
Yuki Okushi
2021-10-20 04:35:13 +09:00
committed by GitHub
parent 71fcb72307 4b743bfef0
commit 84fe598f00
1 changed files with 2 additions and 6 deletions
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library/core/src/iter/adapters/zip.rs
+2 -6
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@@ -427,13 +427,9 @@ unsafe fn as_inner(&mut self) -> &mut A::Source {
}
}
// Since SourceIter forwards the left hand side we do the same here
#[unstable(issue = "none", feature = "inplace_iteration")]
// Limited to Item: Copy since interaction between Zip's use of TrustedRandomAccess
// and Drop implementation of the source is unclear.
//
// An additional method returning the number of times the source has been logically advanced
// (without calling next()) would be needed to properly drop the remainder of the source.
unsafe impl<A: InPlaceIterable, B: Iterator> InPlaceIterable for Zip<A, B> where A::Item: Copy {}
unsafe impl<A: InPlaceIterable, B: Iterator> InPlaceIterable for Zip<A, B> {}
#[stable(feature = "rust1", since = "1.0.0")]
impl<A: Debug, B: Debug> Debug for Zip<A, B> {