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libcore: more cleanups using associated_type_bounds

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This commit is contained in:
Mazdak Farrokhzad 2019-08-15 09:59:25 +02:00
parent 9e9a136fce
commit f54503c908
1 changed files with 2 additions and 6 deletions
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8
src/libcore/iter/adapters/flatten.rs
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@ -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() }
@ -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>,
}