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diff --git a/idlc/inc/astscope.hxx b/idlc/inc/astscope.hxx
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+++ b/idlc/inc/astscope.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef INCLUDED_IDLC_INC_ASTSCOPE_HXX
+#define INCLUDED_IDLC_INC_ASTSCOPE_HXX
+
+#include <sal/config.h>
+
+#include <string_view>
+#include "idlc.hxx"
+#include "astdeclaration.hxx"
+#include "astexpression.hxx"
+
+class AstExpression;
+
+class AstScope
+{
+public:
+    AstScope(NodeType nodeType);
+    virtual ~AstScope();
+
+    AstScope(AstScope const&) = default;
+    AstScope(AstScope&&) = default;
+    AstScope& operator=(AstScope const&) = default;
+    AstScope& operator=(AstScope&&) = default;
+
+    NodeType getScopeNodeType() const { return m_nodeType; }
+
+    AstDeclaration* addDeclaration(AstDeclaration* pDecl);
+
+    sal_uInt32 nMembers() const { return static_cast<sal_uInt32>(m_declarations.size()); }
+    DeclList::const_iterator getIteratorBegin() const { return m_declarations.begin(); }
+    DeclList::const_iterator getIteratorEnd() const { return m_declarations.end(); }
+    sal_uInt16 getNodeCount(NodeType nType) const;
+
+    // Name look up mechanism
+    AstDeclaration* lookupByName(const OString& scopedName);
+    // Look up the identifier 'name' specified only in the local scope
+    AstDeclaration* lookupByNameLocal(std::string_view name) const;
+
+    AstDeclaration* lookupInInherited(const OString& scopedName) const;
+
+    // Look up a predefined type by its ExprType
+    AstDeclaration* lookupPrimitiveType(ExprType type);
+
+    AstDeclaration* lookupForAdd(AstDeclaration const* pDecl) const;
+
+protected:
+    AstDeclaration const* getLast() const { return m_declarations.back(); }
+
+private:
+    DeclList m_declarations;
+    NodeType m_nodeType;
+};
+
+#endif // INCLUDED_IDLC_INC_ASTSCOPE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */