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--- a/src/google/protobuf/repeated_ptr_field.h (index)
+++ b/src/google/protobuf/repeated_ptr_field.h (working tree)
@@ -335,6 +335,15 @@ class PROTOBUF_EXPORT RepeatedPtrFieldBase {
void Reserve(int new_size); // implemented in the cc file
+ template<typename TypeHandler>
+ void Truncate(int new_size) {
+ GOOGLE_DCHECK_LE(new_size, current_size_);
+ for (int i = new_size; i < current_size_; i++) {
+ TypeHandler::Clear(cast<TypeHandler>(rep_->elements[i]));
+ }
+ current_size_ = new_size;
+ }
+
template <typename TypeHandler>
static inline typename TypeHandler::Type* copy(
typename TypeHandler::Type* value) {
@@ -907,6 +916,10 @@ class RepeatedPtrField : private internal::RepeatedPtrFieldBase {
// array is grown, it will always be at least doubled in size.
void Reserve(int new_size);
+ void Truncate(int new_size) {
+ return RepeatedPtrFieldBase::Truncate<TypeHandler>(new_size);
+ }
+
int Capacity() const;
// Gets the underlying array. This pointer is possibly invalidated by
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