take mapped function by mutable reference
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1 changed files with 4 additions and 4 deletions
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@ -1683,7 +1683,7 @@ impl<B, I: Iterator, F> Iterator for Map<I, F> where F: FnMut(I::Item) -> B {
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#[inline]
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fn next(&mut self) -> Option<B> {
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self.iter.next().map(self.f)
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self.iter.next().map(&mut self.f)
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}
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#[inline]
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@ -1698,7 +1698,7 @@ impl<B, I: DoubleEndedIterator, F> DoubleEndedIterator for Map<I, F> where
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{
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#[inline]
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fn next_back(&mut self) -> Option<B> {
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self.iter.next_back().map(self.f)
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self.iter.next_back().map(&mut self.f)
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}
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}
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@ -2210,7 +2210,7 @@ impl<I: Iterator, U: IntoIterator, F> Iterator for FlatMap<I, U, F>
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return Some(x)
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}
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}
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match self.iter.next().map(self.f) {
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match self.iter.next().map(&mut self.f) {
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None => return self.backiter.as_mut().and_then(|it| it.next()),
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next => self.frontiter = next.map(IntoIterator::into_iter),
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}
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@ -2243,7 +2243,7 @@ impl<I: DoubleEndedIterator, U, F> DoubleEndedIterator for FlatMap<I, U, F> wher
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return Some(y)
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}
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}
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match self.iter.next_back().map(self.f) {
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match self.iter.next_back().map(&mut self.f) {
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None => return self.frontiter.as_mut().and_then(|it| it.next_back()),
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next => self.backiter = next.map(IntoIterator::into_iter),
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}
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