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Reformat truncation section of clone_from

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This commit is contained in:
Charles Gleason 2020-01-28 11:59:50 -05:00
parent 81b6f8c3fc
commit 6c3e477d13
1 changed files with 10 additions and 10 deletions
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20
src/liballoc/collections/btree/map.rs
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@ -227,20 +227,20 @@ impl<K: Clone + Ord, V: Clone> BTreeClone for BTreeMap<K, V> {
fn clone_from(&mut self, other: &Self) {
// This truncates `self` to `other.len()` by calling `split_off` on
// the first key after `other.len()` elements if it exists
if let Some(key) = {
if self.len() > other.len() {
let diff = self.len() - other.len();
if diff <= other.len() {
self.iter().nth_back(diff - 1).map(|pair| (*pair.0).clone())
} else {
self.iter().nth(other.len()).map(|pair| (*pair.0).clone())
}
let split_off_key = if self.len() > other.len() {
let diff = self.len() - other.len();
if diff <= other.len() {
self.iter().nth_back(diff - 1).map(|pair| (*pair.0).clone())
} else {
None
self.iter().nth(other.len()).map(|pair| (*pair.0).clone())
}
} {
} else {
None
};
if let Some(key) = split_off_key {
self.split_off(&key);
}
let mut siter = self.range_mut(..);
let mut oiter = other.iter();
// After truncation, `self` is at most as long as `other` so this loop