Add a reserve method on ProxiedInRepeated
PiperOrigin-RevId: 633179853
diff --git a/rust/repeated.rs b/rust/repeated.rs
index 3183e42..c7c9762 100644
--- a/rust/repeated.rs
+++ b/rust/repeated.rs
@@ -296,6 +296,10 @@
/// Copies the values in the `src` repeated field into `dest`.
fn repeated_copy_from(src: View<Repeated<Self>>, dest: Mut<Repeated<Self>>);
+
+ /// Ensures that the repeated field has enough space allocated to insert at
+ /// least `additional` values without an allocation.
+ fn repeated_reserve(repeated: Mut<Repeated<Self>>, additional: usize);
}
/// An iterator over the values inside of a [`View<Repeated<T>>`](RepeatedView).
@@ -489,6 +493,8 @@
ViewT: Into<View<'view, T>>,
{
fn extend<I: IntoIterator<Item = ViewT>>(&mut self, iter: I) {
+ let iter = iter.into_iter();
+ T::repeated_reserve(self.as_mut(), iter.size_hint().0);
for item in iter {
self.push(item.into());
}
