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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of Qt Creator.
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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#ifndef SYMBOLFINDER_H
#define SYMBOLFINDER_H

#include "cpptools_global.h"

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#include "cppfileiterationorder.h"

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#include <QHash>
#include <QStringList>
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#include <set>
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namespace CPlusPlus {
class Class;
class Declaration;
class Function;
class LookupContext;
class Snapshot;
class Symbol;
}

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namespace CppTools {

class CPPTOOLS_EXPORT SymbolFinder
{
public:
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    SymbolFinder();
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    CPlusPlus::Function *findMatchingDefinition(CPlusPlus::Symbol *symbol,
                                                const CPlusPlus::Snapshot &snapshot,
                                                bool strict = false);
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    CPlusPlus::Class *findMatchingClassDeclaration(CPlusPlus::Symbol *declaration,
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                                                   const CPlusPlus::Snapshot &snapshot);
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    void findMatchingDeclaration(const CPlusPlus::LookupContext &context,
                                 CPlusPlus::Function *functionType,
                                 QList<CPlusPlus::Declaration *> *typeMatch,
                                 QList<CPlusPlus::Declaration *> *argumentCountMatch,
                                 QList<CPlusPlus::Declaration *> *nameMatch);

    QList<CPlusPlus::Declaration *> findMatchingDeclaration(const CPlusPlus::LookupContext &context,
                                                            CPlusPlus::Function *functionType);

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    void clearCache();

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private:
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    QStringList fileIterationOrder(const QString &referenceFile,
                                   const CPlusPlus::Snapshot &snapshot);
    void checkCacheConsistency(const QString &referenceFile, const CPlusPlus::Snapshot &snapshot);
    void clearCache(const QString &referenceFile, const QString &comparingFile);
    void insertCache(const QString &referenceFile, const QString &comparingFile);

    void trackCacheUse(const QString &referenceFile);
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    QHash<QString, FileIterationOrder> m_filePriorityCache;
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    QHash<QString, QSet<QString> > m_fileMetaCache;
    QStringList m_recent;
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};

} // namespace CppTools

#endif // SYMBOLFINDER_H