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diff --git a/src/libs/cplusplus/CheckUndefinedSymbols.h b/src/libs/cplusplus/CheckUndefinedSymbols.h
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+++ b/src/libs/cplusplus/CheckUndefinedSymbols.h
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+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://www.qtsoftware.com/contact.
+**
+**************************************************************************/
+
+#ifndef CHECKUNDEFINEDSYMBOLS_H
+#define CHECKUNDEFINEDSYMBOLS_H
+
+#include "CppDocument.h"
+#include "CppBindings.h"
+
+#include <ASTVisitor.h>
+#include <QtCore/QSet>
+#include <QtCore/QByteArray>
+
+namespace CPlusPlus {
+
+class CPLUSPLUS_EXPORT CheckUndefinedSymbols: protected ASTVisitor
+{
+public:
+    CheckUndefinedSymbols(Document::Ptr doc);
+    virtual ~CheckUndefinedSymbols();
+
+    void setGlobalNamespaceBinding(NamespaceBindingPtr globalNamespaceBinding);
+
+    void operator()(AST *ast);
+
+protected:
+    using ASTVisitor::visit;
+
+    void addType(Name *name);
+    void buildTypeMap(Class *klass);
+    void buildTypeMap(NamespaceBinding *binding, QSet<NamespaceBinding *> *processed);
+    FunctionDeclaratorAST *currentFunctionDeclarator() const;
+    bool qobjectCheck() const;
+
+    virtual bool visit(FunctionDeclaratorAST *ast);
+    virtual void endVisit(FunctionDeclaratorAST *ast);
+
+    virtual bool visit(TypeofSpecifierAST *ast);
+    virtual bool visit(TypenameTypeParameterAST *ast);
+    virtual bool visit(TemplateTypeParameterAST *ast);
+    virtual bool visit(NamedTypeSpecifierAST *ast);
+
+    virtual bool visit(ClassSpecifierAST *ast);
+    virtual void endVisit(ClassSpecifierAST *);
+
+    virtual bool visit(FunctionDefinitionAST *ast);
+    virtual bool visit(SimpleDeclarationAST *ast);
+    virtual bool visit(BaseSpecifierAST *base);
+    virtual bool visit(UsingDirectiveAST *ast);
+    virtual bool visit(QualifiedNameAST *ast);
+    virtual bool visit(CastExpressionAST *ast);
+    virtual bool visit(SizeofExpressionAST *ast);
+
+private:
+    Document::Ptr _doc;
+    NamespaceBindingPtr _globalNamespaceBinding;
+    QList<bool> _qobjectStack;
+    QList<FunctionDeclaratorAST *> functionDeclarationStack;
+    QSet<QByteArray> _types;
+    QSet<QByteArray> _namespaceNames;
+};
+
+} // end of namespace CPlusPlus
+
+#endif // CHECKUNDEFINEDSYMBOLS_H