}
#[stable]
-impl<K: Eq + Hash<S>, V, S, H: Hasher<S> + Default> Extend<(K, V)> for HashMap<K, V, H> {
+impl<K: Eq + Hash<S>, V, S, H: Hasher<S>> Extend<(K, V)> for HashMap<K, V, H> {
fn extend<T: Iterator<Item=(K, V)>>(&mut self, mut iter: T) {
for (k, v) in iter {
self.insert(k, v);
}
#[stable]
-impl<T: Eq + Hash<S>, S, H: Hasher<S> + Default> Extend<T> for HashSet<T, H> {
+impl<T: Eq + Hash<S>, S, H: Hasher<S>> Extend<T> for HashSet<T, H> {
fn extend<I: Iterator<Item=T>>(&mut self, mut iter: I) {
for k in iter {
self.insert(k);