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#ifndef QBS_MODULEMERGER_H
#define QBS_MODULEMERGER_H

#include "item.h"
#include "qualifiedid.h"

#include <logging/logger.h>

#include <QHash>
#include <QSet>

namespace qbs {
namespace Internal {

class ModuleMerger {
public:
    ModuleMerger(const Logger &logger, Item *root, Item *moduleToMerge,
            const QualifiedId &moduleName);
    void start();

private:
    Item::PropertyMap dfs(const Item::Module &m, Item::PropertyMap props);
    void pushScalarProperties(Item::PropertyMap *dst, Item *srcItem);
    void mergeOutProps(Item::PropertyMap *dst, const Item::PropertyMap &src);
    void pullListProperties(Item::PropertyMap *dst, Item *instance);
    void appendPrototypeValueToNextChain(Item *moduleProto, const QString &propertyName,
            const ValuePtr &sv);
    static ValuePtr lastInNextChain(const ValuePtr &v);

    const Logger &m_logger;
    Item * const m_rootItem;
    Item *m_mergedModuleItem;
    Item *m_clonedModulePrototype = nullptr;
    const QualifiedId m_moduleName;
    QHash<ValuePtr, PropertyDeclaration> m_decls;
    QSet<const Item *> m_seenInstancesTopDown;
    QSet<const Item *> m_seenInstancesBottomUp;
};

} // namespace Internal
} // namespace qbs

#endif // QBS_MODULEMERGER_H
