text: // Copyright (c) 2012 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_MOVE_H_
  #define BASE_MOVE_H_
  
  #include <utility>
  
  #include "base/compiler_specific.h"
  #include "base/macros.h"
  #include "build/build_config.h"
  
  // TODO(crbug.com/566182): DEPRECATED!
  // Use DISALLOW_COPY_AND_ASSIGN instead, or if your type will be used in
  // Callbacks, use DISALLOW_COPY_AND_ASSIGN_WITH_MOVE_FOR_BIND instead.
  #define MOVE_ONLY_TYPE_FOR_CPP_03(type) \
    DISALLOW_COPY_AND_ASSIGN_WITH_MOVE_FOR_BIND(type)
  
  // A macro to disallow the copy constructor and copy assignment functions.
  // This should be used in the private: declarations for a class.
  //
  // Use this macro instead of DISALLOW_COPY_AND_ASSIGN if you want to pass
  // ownership of the type through a base::Callback without heap-allocating it
  // into a scoped_ptr.  The class must define a move constructor and move
  // assignment operator to make this work.
  //
  // This version of the macro adds a Pass() function and a cryptic
  // MoveOnlyTypeForCPP03 typedef for the base::Callback implementation to use.
  // See IsMoveOnlyType template and its usage in base/callback_internal.h
  // for more details.
  // TODO(crbug.com/566182): Remove this macro and use DISALLOW_COPY_AND_ASSIGN
  // everywhere instead.
  #if defined(OS_ANDROID) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
  #define DISALLOW_COPY_AND_ASSIGN_WITH_MOVE_FOR_BIND(type)       \
   private:                                                       \
    type(const type&) = delete;                                   \
    void operator=(const type&) = delete;                         \
                                                                  \
   public:                                                        \
    typedef void MoveOnlyTypeForCPP03;                            \
                                                                  \
   private:
  #else
  #define DISALLOW_COPY_AND_ASSIGN_WITH_MOVE_FOR_BIND(type)       \
   private:                                                       \
    type(const type&) = delete;                                   \
    void operator=(const type&) = delete;                         \
                                                                  \
   public:                                                        \
    type&& Pass() WARN_UNUSED_RESULT { return std::move(*this); } \
    typedef void MoveOnlyTypeForCPP03;                            \
                                                                  \
   private:
  #endif
  
  #endif  // BASE_MOVE_H_
  