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Fix FlattenCompat::{next, next_back}

This commit is contained in:
Tim Vermeulen 2020-02-06 05:58:04 +01:00
parent 16a23e72d0
commit cff1182bcd
1 changed files with 6 additions and 4 deletions
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10
src/libcore/iter/adapters/flatten.rs
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@ -264,8 +264,9 @@ where
fn next(&mut self) -> Option<U::Item> {
loop {
if let Some(ref mut inner) = self.frontiter {
if let elt @ Some(_) = inner.next() {
return elt;
match inner.next() {
None => self.frontiter = None,
elt @ Some(_) => return elt,
}
}
match self.iter.next() {
@ -351,8 +352,9 @@ where
fn next_back(&mut self) -> Option<U::Item> {
loop {
if let Some(ref mut inner) = self.backiter {
if let elt @ Some(_) = inner.next_back() {
return elt;
match inner.next_back() {
None => self.backiter = None,
elt @ Some(_) => return elt,
}
}
match self.iter.next_back() {