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Rollup merge of rust-lang#63584 - Centril:cleanup-core-with-more-atb,…
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… r=alexreg

libcore: more cleanups using `#![feature(associated_type_bounds)]`

Turns out this was indeed a bootstrapping issue from a test with `./x.py check` locally after rust-lang#63534 merged.

Closes rust-lang#63393

r? @alexreg
cc @iluuu1994
cc rust-lang#52662
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Centril authored Aug 15, 2019
2 parents 90b7c2a + f54503c commit e771421
Showing 1 changed file with 2 additions and 6 deletions.
8 changes: 2 additions & 6 deletions src/libcore/iter/adapters/flatten.rs
Original file line number Diff line number Diff line change
Expand Up @@ -72,8 +72,7 @@ impl<I: Iterator, U: IntoIterator, F> Iterator for FlatMap<I, U, F>
impl<I: DoubleEndedIterator, U, F> DoubleEndedIterator for FlatMap<I, U, F>
where
F: FnMut(I::Item) -> U,
U: IntoIterator,
U::IntoIter: DoubleEndedIterator,
U: IntoIterator<IntoIter: DoubleEndedIterator>,
{
#[inline]
fn next_back(&mut self) -> Option<U::Item> { self.inner.next_back() }
Expand Down Expand Up @@ -107,10 +106,7 @@ impl<I, U, F> FusedIterator for FlatMap<I, U, F>
/// [`Iterator`]: trait.Iterator.html
#[must_use = "iterators are lazy and do nothing unless consumed"]
#[stable(feature = "iterator_flatten", since = "1.29.0")]
pub struct Flatten<I: Iterator>
where
I::Item: IntoIterator,
{
pub struct Flatten<I: Iterator<Item: IntoIterator>> {
inner: FlattenCompat<I, <I::Item as IntoIterator>::IntoIter>,
}

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