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