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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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****************************************************************************/
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#ifndef CPPMODELMANAGER_H
#define CPPMODELMANAGER_H

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#include "cpptools_global.h"
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#include "cpptoolsconstants.h"
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#include "cppmodelmanagerinterface.h"
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#include <projectexplorer/project.h>
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#include <texteditor/basetexteditor.h>

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#include <cplusplus/PreprocessorEnvironment.h>
#include <cplusplus/pp-engine.h>
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#include <QHash>
#include <QMutex>
#include <QTimer>
#include <QTextEdit> // for QTextEdit::ExtraSelection
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namespace Core { class IEditor; }
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namespace TextEditor {
class ITextEditor;
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class BaseTextEditorWidget;
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} // namespace TextEditor
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namespace ProjectExplorer { class ProjectExplorerPlugin; }
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namespace CPlusPlus { class ParseManager; }
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namespace CppTools {
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class CppCompletionSupportFactory;
class CppHighlightingSupportFactory;

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namespace Internal {

class CppEditorSupport;
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class CppPreprocessor;
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class CppFindReferences;
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class CPPTOOLS_EXPORT CppModelManager : public CppTools::CppModelManagerInterface
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{
    Q_OBJECT

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public:
    typedef CPlusPlus::Document Document;

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public:
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    CppModelManager(QObject *parent = 0);
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    virtual ~CppModelManager();

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    static CppModelManager *instance();

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    virtual QFuture<void> updateSourceFiles(const QStringList &sourceFiles);
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    virtual WorkingCopy workingCopy() const;
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    virtual QList<ProjectInfo> projectInfos() const;
    virtual ProjectInfo projectInfo(ProjectExplorer::Project *project) const;
    virtual void updateProjectInfo(const ProjectInfo &pinfo);
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    virtual QList<CppTools::ProjectPart::Ptr> projectPart(const QString &fileName) const;
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    virtual CPlusPlus::Snapshot snapshot() const;
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    virtual Document::Ptr document(const QString &fileName) const;
    bool replaceDocument(Document::Ptr newDoc);
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    virtual void GC();

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    virtual bool isCppEditor(Core::IEditor *editor) const;
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    CppEditorSupport *editorSupport(TextEditor::ITextEditor *editor) const
    { return m_editorSupport.value(editor); }

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    void emitDocumentUpdated(CPlusPlus::Document::Ptr doc);

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    void stopEditorSelectionsUpdate()
    { m_updateEditorSelectionsTimer->stop(); }

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    virtual void addEditorSupport(AbstractEditorSupport *editorSupport);
    virtual void removeEditorSupport(AbstractEditorSupport *editorSupport);

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    virtual QList<int> references(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
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    virtual void renameUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context,
                              const QString &replacement = QString());
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    virtual void findUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
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    virtual void findMacroUsages(const CPlusPlus::Macro &macro);
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    virtual void renameMacroUsages(const CPlusPlus::Macro &macro, const QString &replacement);
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    virtual void setExtraDiagnostics(const QString &fileName, int key,
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                                     const QList<Document::DiagnosticMessage> &diagnostics);
    virtual QList<Document::DiagnosticMessage> extraDiagnostics(
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            const QString &fileName, int key = AllExtraDiagnostics) const;

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    void finishedRefreshingSourceFiles(const QStringList &files);

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    virtual CppCompletionSupport *completionSupport(Core::IEditor *editor) const;
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    virtual void setCppCompletionAssistProvider(CppCompletionAssistProvider *completionAssistProvider);
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    virtual CppHighlightingSupport *highlightingSupport(Core::IEditor *editor) const;
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    virtual void setHighlightingSupportFactory(CppHighlightingSupportFactory *highlightingFactory);
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    virtual void setIndexingSupport(CppIndexingSupport *indexingSupport);
    virtual CppIndexingSupport *indexingSupport();
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    QStringList projectFiles()
    {
        ensureUpdated();
        return m_projectFiles;
    }

    QStringList includePaths()
    {
        ensureUpdated();
        return m_includePaths;
    }

    QStringList frameworkPaths()
    {
        ensureUpdated();
        return m_frameworkPaths;
    }

    QByteArray definedMacros()
    {
        ensureUpdated();
        return m_definedMacros;
    }

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Q_SIGNALS:
    void projectPathChanged(const QString &projectPath);

    void aboutToRemoveFiles(const QStringList &files);

public Q_SLOTS:
    void editorOpened(Core::IEditor *editor);
    void editorAboutToClose(Core::IEditor *editor);
    virtual void updateModifiedSourceFiles();

private Q_SLOTS:
    // this should be executed in the GUI thread.
    void onDocumentUpdated(CPlusPlus::Document::Ptr doc);
    void onExtraDiagnosticsUpdated(const QString &fileName);
    void onAboutToRemoveProject(ProjectExplorer::Project *project);
    void onAboutToUnloadSession();
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    void onCoreAboutToClose();
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    void onProjectAdded(ProjectExplorer::Project *project);
    void postEditorUpdate();
    void updateEditorSelections();

private:
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    void updateEditor(Document::Ptr doc);
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    void replaceSnapshot(const CPlusPlus::Snapshot &newSnapshot);
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    WorkingCopy buildWorkingCopyList();

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    void ensureUpdated();
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    QStringList internalProjectFiles() const;
    QStringList internalIncludePaths() const;
    QStringList internalFrameworkPaths() const;
    QByteArray internalDefinedMacros() const;
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    void dumpModelManagerConfiguration();

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private:
    static QMutex m_modelManagerMutex;
    static CppModelManager *m_modelManagerInstance;

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private:
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    CPlusPlus::Snapshot m_snapshot;
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    bool m_enableGC;
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    // cache
    bool m_dirty;
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    QStringList m_projectFiles;
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    QStringList m_includePaths;
    QStringList m_frameworkPaths;
    QByteArray m_definedMacros;
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    // editor integration
    QMap<TextEditor::ITextEditor *, CppEditorSupport *> m_editorSupport;

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    QSet<AbstractEditorSupport *> m_addtionalEditorSupport;

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    // project integration
    QMap<ProjectExplorer::Project *, ProjectInfo> m_projects;

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    mutable QMutex m_mutex;
    mutable QMutex m_protectSnapshot;
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    struct Editor {
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        Editor()
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            : revision(-1)
            , updateSelections(true)
        {}
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        int revision;
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        bool updateSelections;
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        QPointer<TextEditor::ITextEditor> textEditor;
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        QList<QTextEdit::ExtraSelection> selections;
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        QList<TextEditor::BaseTextEditorWidget::BlockRange> ifdefedOutBlocks;
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    };

    QList<Editor> m_todo;

    QTimer *m_updateEditorSelectionsTimer;
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    CppFindReferences *m_findReferences;
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    bool m_indexerEnabled;
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    mutable QMutex m_protectExtraDiagnostics;
    QHash<QString, QHash<int, QList<Document::DiagnosticMessage> > > m_extraDiagnostics;
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    QMap<QString, QList<CppTools::ProjectPart::Ptr> > m_srcToProjectPart;
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    CppCompletionAssistProvider *m_completionAssistProvider;
    CppCompletionAssistProvider *m_completionFallback;
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    CppHighlightingSupportFactory *m_highlightingFactory;
    CppHighlightingSupportFactory *m_highlightingFallback;
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    CppIndexingSupport *m_indexingSupporter;
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    CppIndexingSupport *m_internalIndexingSupport;
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};
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class CPPTOOLS_EXPORT CppPreprocessor: public CPlusPlus::Client
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{
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    Q_DISABLE_COPY(CppPreprocessor)

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public:
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    CppPreprocessor(QPointer<CppModelManager> modelManager, bool dumpFileNameWhileParsing = false);
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    virtual ~CppPreprocessor();

    void setRevision(unsigned revision);
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    void setWorkingCopy(const CppTools::CppModelManagerInterface::WorkingCopy &workingCopy);
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    void setIncludePaths(const QStringList &includePaths);
    void setFrameworkPaths(const QStringList &frameworkPaths);
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    void addFrameworkPath(const QString &frameworkPath);
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    void setProjectFiles(const QStringList &files);
    void setTodo(const QStringList &files);

    void run(const QString &fileName);
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    void removeFromCache(const QString &fileName);
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    void resetEnvironment();
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    static QString cleanPath(const QString &path);
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    const QSet<QString> &todo() const
    { return m_todo; }

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    CppModelManager *modelManager() const
    { return m_modelManager.data(); }

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protected:
    CPlusPlus::Document::Ptr switchDocument(CPlusPlus::Document::Ptr doc);

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    void getFileContents(const QString &absoluteFilePath, QString *contents, unsigned *revision) const;
    bool checkFile(const QString &absoluteFilePath) const;
    QString resolveFile(const QString &fileName, IncludeType type);
    QString resolveFile_helper(const QString &fileName, IncludeType type);
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    void mergeEnvironment(CPlusPlus::Document::Ptr doc);

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    virtual void macroAdded(const CPlusPlus::Macro &macro);
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    virtual void passedMacroDefinitionCheck(unsigned offset, unsigned line,
                                            const CPlusPlus::Macro &macro);
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    virtual void failedMacroDefinitionCheck(unsigned offset, const CPlusPlus::ByteArrayRef &name);
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    virtual void notifyMacroReference(unsigned offset, unsigned line,
                                      const CPlusPlus::Macro &macro);
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    virtual void startExpandingMacro(unsigned offset,
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                                     unsigned line,
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                                     const CPlusPlus::Macro &macro,
                                     const QVector<CPlusPlus::MacroArgumentReference> &actuals);
    virtual void stopExpandingMacro(unsigned offset, const CPlusPlus::Macro &macro);
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    virtual void markAsIncludeGuard(const QByteArray &macroName);
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    virtual void startSkippingBlocks(unsigned offset);
    virtual void stopSkippingBlocks(unsigned offset);
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    virtual void sourceNeeded(unsigned line, const QString &fileName, IncludeType type);
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private:
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    CPlusPlus::Snapshot m_snapshot;
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    QPointer<CppModelManager> m_modelManager;
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    bool m_dumpFileNameWhileParsing;
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    CPlusPlus::Environment m_env;
    CPlusPlus::Preprocessor m_preprocess;
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    QStringList m_includePaths;
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    CppTools::CppModelManagerInterface::WorkingCopy m_workingCopy;
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    QStringList m_frameworkPaths;
    QSet<QString> m_included;
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    CPlusPlus::Document::Ptr m_currentDoc;
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    QSet<QString> m_todo;
    QSet<QString> m_processed;
    unsigned m_revision;
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    QHash<QString, QString> m_fileNameCache;
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};
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} // namespace Internal
} // namespace CppTools

#endif // CPPMODELMANAGER_H