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-rw-r--r--absl/container/internal/inlined_vector.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/absl/container/internal/inlined_vector.h b/absl/container/internal/inlined_vector.h
index 6a5a75be..4589ce08 100644
--- a/absl/container/internal/inlined_vector.h
+++ b/absl/container/internal/inlined_vector.h
@@ -16,6 +16,7 @@
#define ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
#include <cstddef>
+#include <cstring>
#include <iterator>
#include <memory>
#include <utility>
@@ -31,6 +32,33 @@ using IsAtLeastForwardIterator = std::is_convertible<
typename std::iterator_traits<Iterator>::iterator_category,
std::forward_iterator_tag>;
+template <typename AllocatorType, typename ValueType, typename SizeType>
+void DestroyElements(AllocatorType alloc, ValueType* destroy_first,
+ SizeType destroy_size) {
+ using AllocatorTraits = std::allocator_traits<AllocatorType>;
+
+ // Destroys `destroy_size` elements from `destroy_first`.
+ //
+ // Destroys the range
+ // [`destroy_first`, `destroy_first + destroy_size`).
+ //
+ // NOTE: We assume destructors do not throw and thus make no attempt to roll
+ // back.
+ for (SizeType i = 0; i < destroy_size; ++i) {
+ AllocatorTraits::destroy(alloc, destroy_first + i);
+ }
+
+#ifndef NDEBUG
+ // Overwrite unused memory with `0xab` so we can catch uninitialized usage.
+ //
+ // Cast to `void*` to tell the compiler that we don't care that we might be
+ // scribbling on a vtable pointer.
+ void* memory = reinterpret_cast<void*>(destroy_first);
+ size_t memory_size = sizeof(ValueType) * destroy_size;
+ std::memset(memory, 0xab, memory_size);
+#endif // NDEBUG
+}
+
template <typename T, size_t N, typename A>
class Storage {
public: