Creation of LTS branch "lts_2019_08_08"20190808

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GitOrigin-RevId: 9ee91d3e430fb33a4590486573792eb0fa146c2d
Change-Id: Ia06e548bc106cc9d136f6c65714be6645317aced

1 files changed, 895 insertions, 0 deletions

diff --git a/absl/container/internal/inlined_vector.h b/absl/container/internal/inlined_vector.h
new file mode 100644
index 00000000..123e04c9
--- /dev/null
+++ b/absl/container/internal/inlined_vector.h
@@ -0,0 +1,895 @@
+// Copyright 2019 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
+#define ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
+
+#include <algorithm>
+#include <cstddef>
+#include <cstring>
+#include <iterator>
+#include <limits>
+#include <memory>
+#include <utility>
+
+#include "absl/base/macros.h"
+#include "absl/container/internal/compressed_tuple.h"
+#include "absl/memory/memory.h"
+#include "absl/meta/type_traits.h"
+#include "absl/types/span.h"
+
+namespace absl {
+inline namespace lts_2019_08_08 {
+namespace inlined_vector_internal {
+
+template <typename Iterator>
+using IsAtLeastForwardIterator = std::is_convertible<
+    typename std::iterator_traits<Iterator>::iterator_category,
+    std::forward_iterator_tag>;
+
+template <typename AllocatorType>
+using IsMemcpyOk = absl::conjunction<
+    std::is_same<std::allocator<typename AllocatorType::value_type>,
+                 AllocatorType>,
+    absl::is_trivially_copy_constructible<typename AllocatorType::value_type>,
+    absl::is_trivially_copy_assignable<typename AllocatorType::value_type>,
+    absl::is_trivially_destructible<typename AllocatorType::value_type>>;
+
+template <typename AllocatorType, typename ValueType, typename SizeType>
+void DestroyElements(AllocatorType* alloc_ptr, ValueType* destroy_first,
+                     SizeType destroy_size) {
+  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
+
+  if (destroy_first != nullptr) {
+    for (auto i = destroy_size; i != 0;) {
+      --i;
+      AllocatorTraits::destroy(*alloc_ptr, 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.
+    auto* memory_ptr = static_cast<void*>(destroy_first);
+    auto memory_size = sizeof(ValueType) * destroy_size;
+    std::memset(memory_ptr, 0xab, memory_size);
+#endif  // NDEBUG
+  }
+}
+
+template <typename AllocatorType, typename ValueType, typename ValueAdapter,
+          typename SizeType>
+void ConstructElements(AllocatorType* alloc_ptr, ValueType* construct_first,
+                       ValueAdapter* values_ptr, SizeType construct_size) {
+  for (SizeType i = 0; i < construct_size; ++i) {
+    ABSL_INTERNAL_TRY {
+      values_ptr->ConstructNext(alloc_ptr, construct_first + i);
+    }
+    ABSL_INTERNAL_CATCH_ANY {
+      inlined_vector_internal::DestroyElements(alloc_ptr, construct_first, i);
+      ABSL_INTERNAL_RETHROW;
+    }
+  }
+}
+
+template <typename ValueType, typename ValueAdapter, typename SizeType>
+void AssignElements(ValueType* assign_first, ValueAdapter* values_ptr,
+                    SizeType assign_size) {
+  for (SizeType i = 0; i < assign_size; ++i) {
+    values_ptr->AssignNext(assign_first + i);
+  }
+}
+
+template <typename AllocatorType>
+struct StorageView {
+  using pointer = typename AllocatorType::pointer;
+  using size_type = typename AllocatorType::size_type;
+
+  pointer data;
+  size_type size;
+  size_type capacity;
+};
+
+template <typename AllocatorType, typename Iterator>
+class IteratorValueAdapter {
+  using pointer = typename AllocatorType::pointer;
+  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
+
+ public:
+  explicit IteratorValueAdapter(const Iterator& it) : it_(it) {}
+
+  void ConstructNext(AllocatorType* alloc_ptr, pointer construct_at) {
+    AllocatorTraits::construct(*alloc_ptr, construct_at, *it_);
+    ++it_;
+  }
+
+  void AssignNext(pointer assign_at) {
+    *assign_at = *it_;
+    ++it_;
+  }
+
+ private:
+  Iterator it_;
+};
+
+template <typename AllocatorType>
+class CopyValueAdapter {
+  using pointer = typename AllocatorType::pointer;
+  using const_pointer = typename AllocatorType::const_pointer;
+  using const_reference = typename AllocatorType::const_reference;
+  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
+
+ public:
+  explicit CopyValueAdapter(const_reference v) : ptr_(std::addressof(v)) {}
+
+  void ConstructNext(AllocatorType* alloc_ptr, pointer construct_at) {
+    AllocatorTraits::construct(*alloc_ptr, construct_at, *ptr_);
+  }
+
+  void AssignNext(pointer assign_at) { *assign_at = *ptr_; }
+
+ private:
+  const_pointer ptr_;
+};
+
+template <typename AllocatorType>
+class DefaultValueAdapter {
+  using pointer = typename AllocatorType::pointer;
+  using value_type = typename AllocatorType::value_type;
+  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
+
+ public:
+  explicit DefaultValueAdapter() {}
+
+  void ConstructNext(AllocatorType* alloc_ptr, pointer construct_at) {
+    AllocatorTraits::construct(*alloc_ptr, construct_at);
+  }
+
+  void AssignNext(pointer assign_at) { *assign_at = value_type(); }
+};
+
+template <typename AllocatorType>
+class AllocationTransaction {
+  using value_type = typename AllocatorType::value_type;
+  using pointer = typename AllocatorType::pointer;
+  using size_type = typename AllocatorType::size_type;
+  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
+
+ public:
+  explicit AllocationTransaction(AllocatorType* alloc_ptr)
+      : alloc_data_(*alloc_ptr, nullptr) {}
+
+  ~AllocationTransaction() {
+    if (DidAllocate()) {
+      AllocatorTraits::deallocate(GetAllocator(), GetData(), GetCapacity());
+    }
+  }
+
+  AllocationTransaction(const AllocationTransaction&) = delete;
+  void operator=(const AllocationTransaction&) = delete;
+
+  AllocatorType& GetAllocator() { return alloc_data_.template get<0>(); }
+  pointer& GetData() { return alloc_data_.template get<1>(); }
+  size_type& GetCapacity() { return capacity_; }
+
+  bool DidAllocate() { return GetData() != nullptr; }
+  pointer Allocate(size_type capacity) {
+    GetData() = AllocatorTraits::allocate(GetAllocator(), capacity);
+    GetCapacity() = capacity;
+    return GetData();
+  }
+
+ private:
+  container_internal::CompressedTuple<AllocatorType, pointer> alloc_data_;
+  size_type capacity_ = 0;
+};
+
+template <typename AllocatorType>
+class ConstructionTransaction {
+  using pointer = typename AllocatorType::pointer;
+  using size_type = typename AllocatorType::size_type;
+
+ public:
+  explicit ConstructionTransaction(AllocatorType* alloc_ptr)
+      : alloc_data_(*alloc_ptr, nullptr) {}
+
+  ~ConstructionTransaction() {
+    if (DidConstruct()) {
+      inlined_vector_internal::DestroyElements(std::addressof(GetAllocator()),
+                                               GetData(), GetSize());
+    }
+  }
+
+  ConstructionTransaction(const ConstructionTransaction&) = delete;
+  void operator=(const ConstructionTransaction&) = delete;
+
+  AllocatorType& GetAllocator() { return alloc_data_.template get<0>(); }
+  pointer& GetData() { return alloc_data_.template get<1>(); }
+  size_type& GetSize() { return size_; }
+
+  bool DidConstruct() { return GetData() != nullptr; }
+  template <typename ValueAdapter>
+  void Construct(pointer data, ValueAdapter* values_ptr, size_type size) {
+    inlined_vector_internal::ConstructElements(std::addressof(GetAllocator()),
+                                               data, values_ptr, size);
+    GetData() = data;
+    GetSize() = size;
+  }
+  void Commit() {
+    GetData() = nullptr;
+    GetSize() = 0;
+  }
+
+ private:
+  container_internal::CompressedTuple<AllocatorType, pointer> alloc_data_;
+  size_type size_ = 0;
+};
+
+template <typename T, size_t N, typename A>
+class Storage {
+ public:
+  using allocator_type = A;
+  using value_type = typename allocator_type::value_type;
+  using pointer = typename allocator_type::pointer;
+  using const_pointer = typename allocator_type::const_pointer;
+  using reference = typename allocator_type::reference;
+  using const_reference = typename allocator_type::const_reference;
+  using rvalue_reference = typename allocator_type::value_type&&;
+  using size_type = typename allocator_type::size_type;
+  using difference_type = typename allocator_type::difference_type;
+  using iterator = pointer;
+  using const_iterator = const_pointer;
+  using reverse_iterator = std::reverse_iterator<iterator>;
+  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
+  using MoveIterator = std::move_iterator<iterator>;
+  using AllocatorTraits = absl::allocator_traits<allocator_type>;
+  using IsMemcpyOk = inlined_vector_internal::IsMemcpyOk<allocator_type>;
+
+  using StorageView = inlined_vector_internal::StorageView<allocator_type>;
+
+  template <typename Iterator>
+  using IteratorValueAdapter =
+      inlined_vector_internal::IteratorValueAdapter<allocator_type, Iterator>;
+  using CopyValueAdapter =
+      inlined_vector_internal::CopyValueAdapter<allocator_type>;
+  using DefaultValueAdapter =
+      inlined_vector_internal::DefaultValueAdapter<allocator_type>;
+
+  using AllocationTransaction =
+      inlined_vector_internal::AllocationTransaction<allocator_type>;
+  using ConstructionTransaction =
+      inlined_vector_internal::ConstructionTransaction<allocator_type>;
+
+  static size_type NextCapacity(size_type current_capacity) {
+    return current_capacity * 2;
+  }
+
+  static size_type ComputeCapacity(size_type current_capacity,
+                                   size_type requested_capacity) {
+    return (std::max)(NextCapacity(current_capacity), requested_capacity);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Storage Constructors and Destructor
+  // ---------------------------------------------------------------------------
+
+  Storage() : metadata_() {}
+
+  explicit Storage(const allocator_type& alloc)
+      : metadata_(alloc, /* empty and inlined */ 0) {}
+
+  ~Storage() {
+    pointer data = GetIsAllocated() ? GetAllocatedData() : GetInlinedData();
+    inlined_vector_internal::DestroyElements(GetAllocPtr(), data, GetSize());
+    DeallocateIfAllocated();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Storage Member Accessors
+  // ---------------------------------------------------------------------------
+
+  size_type& GetSizeAndIsAllocated() { return metadata_.template get<1>(); }
+
+  const size_type& GetSizeAndIsAllocated() const {
+    return metadata_.template get<1>();
+  }
+
+  size_type GetSize() const { return GetSizeAndIsAllocated() >> 1; }
+
+  bool GetIsAllocated() const { return GetSizeAndIsAllocated() & 1; }
+
+  pointer GetAllocatedData() { return data_.allocated.allocated_data; }
+
+  const_pointer GetAllocatedData() const {
+    return data_.allocated.allocated_data;
+  }
+
+  pointer GetInlinedData() {
+    return reinterpret_cast<pointer>(
+        std::addressof(data_.inlined.inlined_data[0]));
+  }
+
+  const_pointer GetInlinedData() const {
+    return reinterpret_cast<const_pointer>(
+        std::addressof(data_.inlined.inlined_data[0]));
+  }
+
+  size_type GetAllocatedCapacity() const {
+    return data_.allocated.allocated_capacity;
+  }
+
+  size_type GetInlinedCapacity() const { return static_cast<size_type>(N); }
+
+  StorageView MakeStorageView() {
+    return GetIsAllocated()
+               ? StorageView{GetAllocatedData(), GetSize(),
+                             GetAllocatedCapacity()}
+               : StorageView{GetInlinedData(), GetSize(), GetInlinedCapacity()};
+  }
+
+  allocator_type* GetAllocPtr() {
+    return std::addressof(metadata_.template get<0>());
+  }
+
+  const allocator_type* GetAllocPtr() const {
+    return std::addressof(metadata_.template get<0>());
+  }
+
+  // ---------------------------------------------------------------------------
+  // Storage Member Mutators
+  // ---------------------------------------------------------------------------
+
+  template <typename ValueAdapter>
+  void Initialize(ValueAdapter values, size_type new_size);
+
+  template <typename ValueAdapter>
+  void Assign(ValueAdapter values, size_type new_size);
+
+  template <typename ValueAdapter>
+  void Resize(ValueAdapter values, size_type new_size);
+
+  template <typename ValueAdapter>
+  iterator Insert(const_iterator pos, ValueAdapter values,
+                  size_type insert_count);
+
+  template <typename... Args>
+  reference EmplaceBack(Args&&... args);
+
+  iterator Erase(const_iterator from, const_iterator to);
+
+  void Reserve(size_type requested_capacity);
+
+  void ShrinkToFit();
+
+  void Swap(Storage* other_storage_ptr);
+
+  void SetIsAllocated() {
+    GetSizeAndIsAllocated() |= static_cast<size_type>(1);
+  }
+
+  void UnsetIsAllocated() {
+    GetSizeAndIsAllocated() &= ((std::numeric_limits<size_type>::max)() - 1);
+  }
+
+  void SetSize(size_type size) {
+    GetSizeAndIsAllocated() =
+        (size << 1) | static_cast<size_type>(GetIsAllocated());
+  }
+
+  void SetAllocatedSize(size_type size) {
+    GetSizeAndIsAllocated() = (size << 1) | static_cast<size_type>(1);
+  }
+
+  void SetInlinedSize(size_type size) {
+    GetSizeAndIsAllocated() = size << static_cast<size_type>(1);
+  }
+
+  void AddSize(size_type count) {
+    GetSizeAndIsAllocated() += count << static_cast<size_type>(1);
+  }
+
+  void SubtractSize(size_type count) {
+    assert(count <= GetSize());
+
+    GetSizeAndIsAllocated() -= count << static_cast<size_type>(1);
+  }
+
+  void SetAllocatedData(pointer data, size_type capacity) {
+    data_.allocated.allocated_data = data;
+    data_.allocated.allocated_capacity = capacity;
+  }
+
+  void AcquireAllocatedData(AllocationTransaction* allocation_tx_ptr) {
+    SetAllocatedData(allocation_tx_ptr->GetData(),
+                     allocation_tx_ptr->GetCapacity());
+    allocation_tx_ptr->GetData() = nullptr;
+    allocation_tx_ptr->GetCapacity() = 0;
+  }
+
+  void MemcpyFrom(const Storage& other_storage) {
+    assert(IsMemcpyOk::value || other_storage.GetIsAllocated());
+
+    GetSizeAndIsAllocated() = other_storage.GetSizeAndIsAllocated();
+    data_ = other_storage.data_;
+  }
+
+  void DeallocateIfAllocated() {
+    if (GetIsAllocated()) {
+      AllocatorTraits::deallocate(*GetAllocPtr(), GetAllocatedData(),
+                                  GetAllocatedCapacity());
+    }
+  }
+
+ private:
+  using Metadata =
+      container_internal::CompressedTuple<allocator_type, size_type>;
+
+  struct Allocated {
+    pointer allocated_data;
+    size_type allocated_capacity;
+  };
+
+  struct Inlined {
+    using InlinedDataElement =
+        absl::aligned_storage_t<sizeof(value_type), alignof(value_type)>;
+    InlinedDataElement inlined_data[N];
+  };
+
+  union Data {
+    Allocated allocated;
+    Inlined inlined;
+  };
+
+  Metadata metadata_;
+  Data data_;
+};
+
+template <typename T, size_t N, typename A>
+template <typename ValueAdapter>
+auto Storage<T, N, A>::Initialize(ValueAdapter values, size_type new_size)
+    -> void {
+  // Only callable from constructors!
+  assert(!GetIsAllocated());
+  assert(GetSize() == 0);
+
+  pointer construct_data;
+
+  if (new_size > GetInlinedCapacity()) {
+    // Because this is only called from the `InlinedVector` constructors, it's
+    // safe to take on the allocation with size `0`. If `ConstructElements(...)`
+    // throws, deallocation will be automatically handled by `~Storage()`.
+    size_type new_capacity = ComputeCapacity(GetInlinedCapacity(), new_size);
+    pointer new_data = AllocatorTraits::allocate(*GetAllocPtr(), new_capacity);
+
+    SetAllocatedData(new_data, new_capacity);
+    SetIsAllocated();
+
+    construct_data = new_data;
+  } else {
+    construct_data = GetInlinedData();
+  }
+
+  inlined_vector_internal::ConstructElements(GetAllocPtr(), construct_data,
+                                             &values, new_size);
+
+  // Since the initial size was guaranteed to be `0` and the allocated bit is
+  // already correct for either case, *adding* `new_size` gives us the correct
+  // result faster than setting it directly.
+  AddSize(new_size);
+}
+
+template <typename T, size_t N, typename A>
+template <typename ValueAdapter>
+auto Storage<T, N, A>::Assign(ValueAdapter values, size_type new_size) -> void {
+  StorageView storage_view = MakeStorageView();
+
+  AllocationTransaction allocation_tx(GetAllocPtr());
+
+  absl::Span<value_type> assign_loop;
+  absl::Span<value_type> construct_loop;
+  absl::Span<value_type> destroy_loop;
+
+  if (new_size > storage_view.capacity) {
+    size_type new_capacity = ComputeCapacity(storage_view.capacity, new_size);
+    pointer new_data = allocation_tx.Allocate(new_capacity);
+
+    construct_loop = {new_data, new_size};
+    destroy_loop = {storage_view.data, storage_view.size};
+  } else if (new_size > storage_view.size) {
+    assign_loop = {storage_view.data, storage_view.size};
+    construct_loop = {storage_view.data + storage_view.size,
+                      new_size - storage_view.size};
+  } else {
+    assign_loop = {storage_view.data, new_size};
+    destroy_loop = {storage_view.data + new_size, storage_view.size - new_size};
+  }
+
+  inlined_vector_internal::AssignElements(assign_loop.data(), &values,
+                                          assign_loop.size());
+
+  inlined_vector_internal::ConstructElements(
+      GetAllocPtr(), construct_loop.data(), &values, construct_loop.size());
+
+  inlined_vector_internal::DestroyElements(GetAllocPtr(), destroy_loop.data(),
+                                           destroy_loop.size());
+
+  if (allocation_tx.DidAllocate()) {
+    DeallocateIfAllocated();
+    AcquireAllocatedData(&allocation_tx);
+    SetIsAllocated();
+  }
+
+  SetSize(new_size);
+}
+
+template <typename T, size_t N, typename A>
+template <typename ValueAdapter>
+auto Storage<T, N, A>::Resize(ValueAdapter values, size_type new_size) -> void {
+  StorageView storage_view = MakeStorageView();
+
+  AllocationTransaction allocation_tx(GetAllocPtr());
+  ConstructionTransaction construction_tx(GetAllocPtr());
+
+  IteratorValueAdapter<MoveIterator> move_values(
+      MoveIterator(storage_view.data));
+
+  absl::Span<value_type> construct_loop;
+  absl::Span<value_type> move_construct_loop;
+  absl::Span<value_type> destroy_loop;
+
+  if (new_size > storage_view.capacity) {
+    size_type new_capacity = ComputeCapacity(storage_view.capacity, new_size);
+    pointer new_data = allocation_tx.Allocate(new_capacity);
+    construct_loop = {new_data + storage_view.size,
+                      new_size - storage_view.size};
+    move_construct_loop = {new_data, storage_view.size};
+    destroy_loop = {storage_view.data, storage_view.size};
+  } else if (new_size > storage_view.size) {
+    construct_loop = {storage_view.data + storage_view.size,
+                      new_size - storage_view.size};
+  } else {
+    destroy_loop = {storage_view.data + new_size, storage_view.size - new_size};
+  }
+
+  construction_tx.Construct(construct_loop.data(), &values,
+                            construct_loop.size());
+
+  inlined_vector_internal::ConstructElements(
+      GetAllocPtr(), move_construct_loop.data(), &move_values,
+      move_construct_loop.size());
+
+  inlined_vector_internal::DestroyElements(GetAllocPtr(), destroy_loop.data(),
+                                           destroy_loop.size());
+
+  construction_tx.Commit();
+  if (allocation_tx.DidAllocate()) {
+    DeallocateIfAllocated();
+    AcquireAllocatedData(&allocation_tx);
+    SetIsAllocated();
+  }
+
+  SetSize(new_size);
+}
+
+template <typename T, size_t N, typename A>
+template <typename ValueAdapter>
+auto Storage<T, N, A>::Insert(const_iterator pos, ValueAdapter values,
+                              size_type insert_count) -> iterator {
+  StorageView storage_view = MakeStorageView();
+
+  size_type insert_index =
+      std::distance(const_iterator(storage_view.data), pos);
+  size_type insert_end_index = insert_index + insert_count;
+  size_type new_size = storage_view.size + insert_count;
+
+  if (new_size > storage_view.capacity) {
+    AllocationTransaction allocation_tx(GetAllocPtr());
+    ConstructionTransaction construction_tx(GetAllocPtr());
+    ConstructionTransaction move_construciton_tx(GetAllocPtr());
+
+    IteratorValueAdapter<MoveIterator> move_values(
+        MoveIterator(storage_view.data));
+
+    size_type new_capacity = ComputeCapacity(storage_view.capacity, new_size);
+    pointer new_data = allocation_tx.Allocate(new_capacity);
+
+    construction_tx.Construct(new_data + insert_index, &values, insert_count);
+
+    move_construciton_tx.Construct(new_data, &move_values, insert_index);
+
+    inlined_vector_internal::ConstructElements(
+        GetAllocPtr(), new_data + insert_end_index, &move_values,
+        storage_view.size - insert_index);
+
+    inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
+                                             storage_view.size);
+
+    construction_tx.Commit();
+    move_construciton_tx.Commit();
+    DeallocateIfAllocated();
+    AcquireAllocatedData(&allocation_tx);
+
+    SetAllocatedSize(new_size);
+    return iterator(new_data + insert_index);
+  } else {
+    size_type move_construction_destination_index =
+        (std::max)(insert_end_index, storage_view.size);
+
+    ConstructionTransaction move_construction_tx(GetAllocPtr());
+
+    IteratorValueAdapter<MoveIterator> move_construction_values(
+        MoveIterator(storage_view.data +
+                     (move_construction_destination_index - insert_count)));
+    absl::Span<value_type> move_construction = {
+        storage_view.data + move_construction_destination_index,
+        new_size - move_construction_destination_index};
+
+    pointer move_assignment_values = storage_view.data + insert_index;
+    absl::Span<value_type> move_assignment = {
+        storage_view.data + insert_end_index,
+        move_construction_destination_index - insert_end_index};
+
+    absl::Span<value_type> insert_assignment = {move_assignment_values,
+                                                move_construction.size()};
+
+    absl::Span<value_type> insert_construction = {
+        insert_assignment.data() + insert_assignment.size(),
+        insert_count - insert_assignment.size()};
+
+    move_construction_tx.Construct(move_construction.data(),
+                                   &move_construction_values,
+                                   move_construction.size());
+
+    for (pointer destination = move_assignment.data() + move_assignment.size(),
+                 last_destination = move_assignment.data(),
+                 source = move_assignment_values + move_assignment.size();
+         ;) {
+      --destination;
+      --source;
+      if (destination < last_destination) break;
+      *destination = std::move(*source);
+    }
+
+    inlined_vector_internal::AssignElements(insert_assignment.data(), &values,
+                                            insert_assignment.size());
+
+    inlined_vector_internal::ConstructElements(
+        GetAllocPtr(), insert_construction.data(), &values,
+        insert_construction.size());
+
+    move_construction_tx.Commit();
+
+    AddSize(insert_count);
+    return iterator(storage_view.data + insert_index);
+  }
+}
+
+template <typename T, size_t N, typename A>
+template <typename... Args>
+auto Storage<T, N, A>::EmplaceBack(Args&&... args) -> reference {
+  StorageView storage_view = MakeStorageView();
+
+  AllocationTransaction allocation_tx(GetAllocPtr());
+
+  IteratorValueAdapter<MoveIterator> move_values(
+      MoveIterator(storage_view.data));
+
+  pointer construct_data;
+
+  if (storage_view.size == storage_view.capacity) {
+    size_type new_capacity = NextCapacity(storage_view.capacity);
+    pointer new_data = allocation_tx.Allocate(new_capacity);
+
+    construct_data = new_data;
+  } else {
+    construct_data = storage_view.data;
+  }
+
+  pointer end = construct_data + storage_view.size;
+
+  AllocatorTraits::construct(*GetAllocPtr(), end, std::forward<Args>(args)...);
+
+  if (allocation_tx.DidAllocate()) {
+    ABSL_INTERNAL_TRY {
+      inlined_vector_internal::ConstructElements(
+          GetAllocPtr(), allocation_tx.GetData(), &move_values,
+          storage_view.size);
+    }
+    ABSL_INTERNAL_CATCH_ANY {
+      AllocatorTraits::destroy(*GetAllocPtr(), end);
+      ABSL_INTERNAL_RETHROW;
+    }
+
+    inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
+                                             storage_view.size);
+
+    DeallocateIfAllocated();
+    AcquireAllocatedData(&allocation_tx);
+    SetIsAllocated();
+  }
+
+  AddSize(1);
+  return *end;
+}
+
+template <typename T, size_t N, typename A>
+auto Storage<T, N, A>::Erase(const_iterator from, const_iterator to)
+    -> iterator {
+  assert(from != to);
+
+  StorageView storage_view = MakeStorageView();
+
+  size_type erase_size = std::distance(from, to);
+  size_type erase_index =
+      std::distance(const_iterator(storage_view.data), from);
+  size_type erase_end_index = erase_index + erase_size;
+
+  IteratorValueAdapter<MoveIterator> move_values(
+      MoveIterator(storage_view.data + erase_end_index));
+
+  inlined_vector_internal::AssignElements(storage_view.data + erase_index,
+                                          &move_values,
+                                          storage_view.size - erase_end_index);
+
+  inlined_vector_internal::DestroyElements(
+      GetAllocPtr(), storage_view.data + (storage_view.size - erase_size),
+      erase_size);
+
+  SubtractSize(erase_size);
+  return iterator(storage_view.data + erase_index);
+}
+
+template <typename T, size_t N, typename A>
+auto Storage<T, N, A>::Reserve(size_type requested_capacity) -> void {
+  StorageView storage_view = MakeStorageView();
+
+  if (ABSL_PREDICT_FALSE(requested_capacity <= storage_view.capacity)) return;
+
+  AllocationTransaction allocation_tx(GetAllocPtr());
+
+  IteratorValueAdapter<MoveIterator> move_values(
+      MoveIterator(storage_view.data));
+
+  size_type new_capacity =
+      ComputeCapacity(storage_view.capacity, requested_capacity);
+  pointer new_data = allocation_tx.Allocate(new_capacity);
+
+  inlined_vector_internal::ConstructElements(GetAllocPtr(), new_data,
+                                             &move_values, storage_view.size);
+
+  inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
+                                           storage_view.size);
+
+  DeallocateIfAllocated();
+  AcquireAllocatedData(&allocation_tx);
+  SetIsAllocated();
+}
+
+template <typename T, size_t N, typename A>
+auto Storage<T, N, A>::ShrinkToFit() -> void {
+  // May only be called on allocated instances!
+  assert(GetIsAllocated());
+
+  StorageView storage_view{GetAllocatedData(), GetSize(),
+                           GetAllocatedCapacity()};
+
+  if (ABSL_PREDICT_FALSE(storage_view.size == storage_view.capacity)) return;
+
+  AllocationTransaction allocation_tx(GetAllocPtr());
+
+  IteratorValueAdapter<MoveIterator> move_values(
+      MoveIterator(storage_view.data));
+
+  pointer construct_data;
+
+  if (storage_view.size > GetInlinedCapacity()) {
+    size_type new_capacity = storage_view.size;
+    pointer new_data = allocation_tx.Allocate(new_capacity);
+
+    construct_data = new_data;
+  } else {
+    construct_data = GetInlinedData();
+  }
+
+  ABSL_INTERNAL_TRY {
+    inlined_vector_internal::ConstructElements(GetAllocPtr(), construct_data,
+                                               &move_values, storage_view.size);
+  }
+  ABSL_INTERNAL_CATCH_ANY {
+    SetAllocatedData(storage_view.data, storage_view.capacity);
+    ABSL_INTERNAL_RETHROW;
+  }
+
+  inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
+                                           storage_view.size);
+
+  AllocatorTraits::deallocate(*GetAllocPtr(), storage_view.data,
+                              storage_view.capacity);
+
+  if (allocation_tx.DidAllocate()) {
+    AcquireAllocatedData(&allocation_tx);
+  } else {
+    UnsetIsAllocated();
+  }
+}
+
+template <typename T, size_t N, typename A>
+auto Storage<T, N, A>::Swap(Storage* other_storage_ptr) -> void {
+  using std::swap;
+  assert(this != other_storage_ptr);
+
+  if (GetIsAllocated() && other_storage_ptr->GetIsAllocated()) {
+    swap(data_.allocated, other_storage_ptr->data_.allocated);
+  } else if (!GetIsAllocated() && !other_storage_ptr->GetIsAllocated()) {
+    Storage* small_ptr = this;
+    Storage* large_ptr = other_storage_ptr;
+    if (small_ptr->GetSize() > large_ptr->GetSize()) swap(small_ptr, large_ptr);
+
+    for (size_type i = 0; i < small_ptr->GetSize(); ++i) {
+      swap(small_ptr->GetInlinedData()[i], large_ptr->GetInlinedData()[i]);
+    }
+
+    IteratorValueAdapter<MoveIterator> move_values(
+        MoveIterator(large_ptr->GetInlinedData() + small_ptr->GetSize()));
+
+    inlined_vector_internal::ConstructElements(
+        large_ptr->GetAllocPtr(),
+        small_ptr->GetInlinedData() + small_ptr->GetSize(), &move_values,
+        large_ptr->GetSize() - small_ptr->GetSize());
+
+    inlined_vector_internal::DestroyElements(
+        large_ptr->GetAllocPtr(),
+        large_ptr->GetInlinedData() + small_ptr->GetSize(),
+        large_ptr->GetSize() - small_ptr->GetSize());
+  } else {
+    Storage* allocated_ptr = this;
+    Storage* inlined_ptr = other_storage_ptr;
+    if (!allocated_ptr->GetIsAllocated()) swap(allocated_ptr, inlined_ptr);
+
+    StorageView allocated_storage_view{allocated_ptr->GetAllocatedData(),
+                                       allocated_ptr->GetSize(),
+                                       allocated_ptr->GetAllocatedCapacity()};
+
+    IteratorValueAdapter<MoveIterator> move_values(
+        MoveIterator(inlined_ptr->GetInlinedData()));
+
+    ABSL_INTERNAL_TRY {
+      inlined_vector_internal::ConstructElements(
+          inlined_ptr->GetAllocPtr(), allocated_ptr->GetInlinedData(),
+          &move_values, inlined_ptr->GetSize());
+    }
+    ABSL_INTERNAL_CATCH_ANY {
+      allocated_ptr->SetAllocatedData(allocated_storage_view.data,
+                                      allocated_storage_view.capacity);
+      ABSL_INTERNAL_RETHROW;
+    }
+
+    inlined_vector_internal::DestroyElements(inlined_ptr->GetAllocPtr(),
+                                             inlined_ptr->GetInlinedData(),
+                                             inlined_ptr->GetSize());
+
+    inlined_ptr->SetAllocatedData(allocated_storage_view.data,
+                                  allocated_storage_view.capacity);
+  }
+
+  swap(GetSizeAndIsAllocated(), other_storage_ptr->GetSizeAndIsAllocated());
+  swap(*GetAllocPtr(), *other_storage_ptr->GetAllocPtr());
+}
+
+}  // namespace inlined_vector_internal
+}  // inline namespace lts_2019_08_08
+}  // namespace absl
+
+#endif  // ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_