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// Copyright 2020 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_UNION_BASE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_UNION_BASE_H_
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "v8/include/v8.h"
namespace blink {
class ExceptionState;
namespace bindings {
// UnionBase is the common base class of all the IDL union 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
// IDL unions from anything else. Also it provides a common implementation of
// IDL unions.
class PLATFORM_EXPORT UnionBase : public GarbageCollected<UnionBase> {
public:
virtual ~UnionBase() = default;
virtual void Trace(Visitor*) const {}
protected:
// Helper function to reduce the binary size of the generated bindings.
static void ThrowTypeErrorNotOfType(ExceptionState& exception_state,
const char* expected_type);
UnionBase() = default;
};
} // namespace bindings
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_UNION_BASE_H_
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