chromium/third_party/blink/renderer/platform/bindings/callback_interface_base.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_CALLBACK_INTERFACE_BASE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_CALLBACK_INTERFACE_BASE_H_

#include "third_party/blink/public/common/scheduler/task_attribution_id.h"
#include "third_party/blink/renderer/platform/bindings/name_client.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"

namespace blink {

// CallbackInterfaceBase is the common base class of all the callback interface
// classes. Most importantly this class provides a way of type dispatching (e.g.
// overload resolutions, SFINAE technique, etc.) so that it's possible to
// distinguish callback interfaces from anything else. Also it provides a common
// implementation of callback interfaces.
//
// As the signatures of callback interface's operations vary, this class does
// not implement any operation. Subclasses will implement it.
class PLATFORM_EXPORT CallbackInterfaceBase
    : public GarbageCollected<CallbackInterfaceBase>,
      public NameClient { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_CALLBACK_INTERFACE_BASE_H_