1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef SCOPED_REFPTR_H_
6#define SCOPED_REFPTR_H_
7
8// Stub scoped_refptr<T> class that supports an implicit cast to T*.
9template <class T>
10class scoped_refptr {
11 public:
12  typedef T element_type;
13  scoped_refptr() : ptr_(0) {}
14  scoped_refptr(T* p) : ptr_(p) {}
15  scoped_refptr(const scoped_refptr<T>& r) : ptr_(r.ptr_) {}
16
17  template <typename U>
18  scoped_refptr(const scoped_refptr<U>& r)
19      : ptr_(r.get()) {}
20
21  ~scoped_refptr() {}
22
23  T* get() const { return ptr_; }
24  operator T*() const { return ptr_; }
25  T* operator->() const { return ptr_; }
26
27  scoped_refptr<T>& operator=(T* p) {
28    ptr_ = p;
29    return *this;
30  }
31  scoped_refptr<T>& operator=(const scoped_refptr<T>& r) {
32    return *this = r.ptr_;
33  }
34  template <typename U>
35  scoped_refptr<T>& operator=(const scoped_refptr<U>& r) {
36    return *this = r.get();
37  }
38
39 protected:
40  T* ptr_;
41};
42
43#endif  // SCOPED_REFPTR_H_
44