Add ScopedDeque (similar to the existing ScopedVector).

base/memory/scoped_deque.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MEMORY_SCOPED_DEQUE_H_
+#define BASE_MEMORY_SCOPED_DEQUE_H_
+#pragma once
+
+#include <deque>
+
+#include "base/basictypes.h"
+#include "base/stl_util.h"
+
+// ScopedDeque wraps a deque deleting the elements from its destructor
+template <class T>
+class ScopedDeque {
+ public:
+  typedef typename std::deque<T*>::iterator iterator;
+  typedef typename std::deque<T*>::const_iterator const_iterator;
+  typedef typename std::deque<T*>::reverse_iterator reverse_iterator;
+  typedef typename std::deque<T*>::const_reverse_iterator
+      const_reverse_iterator;
+
+  ScopedDeque() {}
+  ~ScopedDeque() { clear(); }
+
+  std::deque<T*>* operator->() { return &d; }
+  const std::deque<T*>* operator->() const { return &d; }
+  T*& operator[](size_t i) { return d[i]; }
+  const T* operator[](size_t i) const { return d[i]; }
+
+  bool empty() const { return d.empty(); }
+  size_t size() const { return d.size(); }
+
+  reverse_iterator rbegin() { return d.rbegin(); }
+  const_reverse_iterator rbegin() const { return d.rbegin(); }
+  reverse_iterator rend() { return d.rend(); }
+  const_reverse_iterator rend() const { return d.rend(); }
+
+  iterator begin() { return d.begin(); }
+  const_iterator begin() const { return d.begin(); }
+  iterator end() { return d.end(); }
+  const_iterator end() const { return d.end(); }
+
+  void push_back(T* elem) { d.push_back(elem); }
+  void push_front(T* elem) { d.push_front(elem); }
+
+  void pop_back() { delete d.back(); d.pop_back(); }
+  void pop_front() { delete d.front(); d.pop_front(); }
+
+  T*& front() { return d.front(); }
+  const T* front() const { return d.front(); }
+  T*& back() { return d.back(); }
+  const T* back() const { return d.back(); }
+
+  std::deque<T*>& get() { return d; }
+  const std::deque<T*>& get() const { return d; }
+  void swap(ScopedDeque<T>& other) { d.swap(other.d); }
+  void release(std::deque<T*>* out) {
+    out->swap(d);
+    d.clear();
+  }
+
+  void clear() {
+    STLDeleteElements(&d);
+    d.clear();
+  }
+  void resize(size_t new_size) { d.resize(new_size); }
+
+  // Lets the ScopedDeque take ownership of |x|.
+  iterator insert(iterator position, T* x) {
+    return d.insert(position, x);
+  }
+
+  // Lets the ScopedDeque take ownership of elements in [first,last).
+  template<typename InputIterator>
+  void insert(iterator position, InputIterator first, InputIterator last) {
+    d.insert(position, first, last);
+  }
+
+  iterator erase(iterator position) {
+    delete *position;
+    return d.erase(position);
+  }
+
+  iterator erase(iterator first, iterator last) {
+    STLDeleteContainerPointers(first, last);
+    return d.erase(first, last);
+  }
+
+  // Like |erase()|, but doesn't delete the element at |position|.
+  iterator weak_erase(iterator position) {
+    return d.erase(position);
+  }
+
+  // Like |erase()|, but doesn't delete the elements in [first, last).
+  iterator weak_erase(iterator first, iterator last) {
+    return d.erase(first, last);
+  }
+
+ private:
+  std::deque<T*> d;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedDeque);
+};
+
+#endif  // BASE_MEMORY_SCOPED_DEQUE_H_