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diff --git a/idlc/inc/idlc/astunion.hxx b/idlc/inc/idlc/astunion.hxx
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+++ b/idlc/inc/idlc/astunion.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+#ifndef _IDLC_ASTUNION_HXX_
+#define _IDLC_ASTUNION_HXX_
+
+#include <idlc/aststruct.hxx>
+#include <idlc/astunionbranch.hxx>
+
+class AstUnion : public AstStruct
+{
+public:
+    AstUnion(const ::rtl::OString& name, AstType* pDiscType, AstScope* pScope);
+    virtual ~AstUnion();
+
+    AstType* getDiscrimantType()
+        { return m_pDiscriminantType; }
+    ExprType getDiscrimantExprType()
+        { return m_discExprType; }
+
+    virtual sal_Bool dump(RegistryKey& rKey);
+
+    virtual AstDeclaration* addDeclaration(AstDeclaration* pDecl);
+protected:
+    // Look up a branch by node pointer
+    AstUnionBranch* lookupBranch(AstUnionBranch* pBranch);
+
+    // Look up the branch with the "default" label
+    AstUnionBranch* lookupDefault(sal_Bool bReportError = sal_True );
+
+    // Look up a branch given a branch with a label. This is used to
+    // check for duplicate labels
+    AstUnionBranch* lookupLabel(AstUnionBranch* pBranch);
+
+    // Look up a union branch given an enumerator. This is used to
+    // check for duplicate enum labels
+    AstUnionBranch* lookupEnum(AstUnionBranch* pBranch);
+
+private:
+    AstType*    m_pDiscriminantType;
+    ExprType    m_discExprType;
+};
+
+#endif // _IDLC_ASTUNION_HXX_
+