Auto merge of #18494 - frewsxcv:frewsxcv-size-hint, r=jdm

Implement `size_hint` for more iterators.

```
implement size hint for
more iterators because why
not we like fast things
```

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This commit is contained in:
bors-servo 2017-09-13 19:38:32 -05:00 committed by GitHub
commit bb2030a493
8 changed files with 36 additions and 0 deletions

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@ -765,6 +765,10 @@ impl<'a> Iterator for AbsoluteDescendantIter<'a> {
fn next(&mut self) -> Option<&'a mut Flow> {
self.iter.next().map(|info| FlowRef::deref_mut(&mut info.flow))
}
fn size_hint(&self) -> (usize, Option<usize>) {
self.iter.size_hint()
}
}
pub type AbsoluteDescendantOffsetIter<'a> = Zip<AbsoluteDescendantIter<'a>, IterMut<'a, Au>>;

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@ -979,6 +979,10 @@ impl InlineFlow {
self.iter.next()
}
}
fn size_hint(&self) -> (usize, Option<usize>) {
self.iter.size_hint()
}
}
// If the bidi embedding direction is opposite the layout direction, lay out this