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Simplify String’s Extend<&str> implementation #27986

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Merged
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Aug 25, 2015
Merged

Simplify String’s Extend<&str> implementation #27986

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6 changes: 1 addition & 5 deletions src/libcollections/string.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -813,11 +813,7 @@ impl<'a> Extend<&'a char> for String {
#[stable(feature = "rust1", since = "1.0.0")]
impl<'a> Extend<&'a str> for String {
fn extend<I: IntoIterator<Item=&'a str>>(&mut self, iterable: I) {
let iterator = iterable.into_iter();
// A guess that at least one byte per iterator element will be needed.
let (lower_bound, _) = iterator.size_hint();
self.reserve(lower_bound);
for s in iterator {
for s in iterable {
self.push_str(s)
}
}
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