IDL: Enumeration support in union types

Source/bindings/tests/results/core/UnionTypesCore.h

Index: Source/bindings/tests/results/core/UnionTypesCore.h
diff --git a/Source/bindings/tests/results/core/UnionTypesCore.h b/Source/bindings/tests/results/core/UnionTypesCore.h
index d513788aebbb39a2e6d31a73b36a8fe0c90946e7..b6d407e95841ae3f126519866dab56b9c8e98c84 100644
--- a/Source/bindings/tests/results/core/UnionTypesCore.h
+++ b/Source/bindings/tests/results/core/UnionTypesCore.h
@@ -368,6 +368,52 @@ struct NativeValueTraits<StringOrStringSequence> {
     static StringOrStringSequence nativeValue(const v8::Local<v8::Value>&, v8::Isolate*, ExceptionState&);
 };
 
+class TestEnumOrDouble final {
+    ALLOW_ONLY_INLINE_ALLOCATION();
+public:
+    TestEnumOrDouble();
+    bool isNull() const { return m_type == SpecificTypeNone; }
+
+    bool isTestEnum() const { return m_type == SpecificTypeTestEnum; }
+    String getAsTestEnum() const;
+    void setTestEnum(String);
+
+    bool isDouble() const { return m_type == SpecificTypeDouble; }
+    double getAsDouble() const;
+    void setDouble(double);
+
+private:
+    enum SpecificTypes {
+        SpecificTypeNone,
+        SpecificTypeTestEnum,
+        SpecificTypeDouble,
+    };
+    SpecificTypes m_type;
+
+    String m_testEnum;
+    double m_double;
+
+    friend v8::Local<v8::Value> toV8(const TestEnumOrDouble&, v8::Local<v8::Object>, v8::Isolate*);
+};
+
+class V8TestEnumOrDouble final {
+public:
+    static void toImpl(v8::Isolate*, v8::Local<v8::Value>, TestEnumOrDouble&, ExceptionState&);
+};
+
+v8::Local<v8::Value> toV8(const TestEnumOrDouble&, v8::Local<v8::Object>, v8::Isolate*);
+
+template <class CallbackInfo>
+inline void v8SetReturnValue(const CallbackInfo& callbackInfo, TestEnumOrDouble& impl)
+{
+    v8SetReturnValue(callbackInfo, toV8(impl, callbackInfo.Holder(), callbackInfo.GetIsolate()));
+}
+
+template <>
+struct NativeValueTraits<TestEnumOrDouble> {
+    static TestEnumOrDouble nativeValue(const v8::Local<v8::Value>&, v8::Isolate*, ExceptionState&);
+};
+
 class TestInterface2OrUint8Array final {
     ALLOW_ONLY_INLINE_ALLOCATION();
 public: