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Mention FusedIterator case in Iterator::fuse doc #84489

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Apr 24, 2021
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Mention FusedIterator case in Iterator::fuse doc #84489

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5 changes: 5 additions & 0 deletions library/core/src/iter/traits/iterator.rs
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Expand Up @@ -1495,7 +1495,12 @@ pub trait Iterator {
/// [`Some(T)`] again. `fuse()` adapts an iterator, ensuring that after a
/// [`None`] is given, it will always return [`None`] forever.
///
/// Note that the [`Fuse`] wrapper is a no-op on iterators that implement
/// the [`FusedIterator`] trait. `fuse()` may therefore behave incorrectly
/// if the [`FusedIterator`] trait is improperly implemented.
///
/// [`Some(T)`]: Some
/// [`FusedIterator`]: crate::iter::FusedIterator
///
/// # Examples
///
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