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****************************************************************************/

#ifndef RPPTREEEVALUATOR_H

#define RPPTREEEVALUATOR_H

#include "tokenengine.h"

#include "rpp.h"

#include "rpptreewalker.h"

#include <QObject>

#include <QList>

#include <QHash>

#include <QSet>

QT_BEGIN_NAMESPACE

namespace Rpp {

class DefineMap : public QHash<QByteArray, const DefineDirective *>

{

};

class RppTreeEvaluator: public QObject, public RppTreeWalker

{

Q_OBJECT

public:

    RppTreeEvaluator();

    ~RppTreeEvaluator();

    TokenEngine::TokenSectionSequence evaluate(const Source *source,

                                              DefineMap *activedefinitions);

    enum IncludeType {QuoteInclude, AngleBracketInclude};

signals:

    void includeCallback(Rpp::Source *&includee,

                         const Rpp::Source *includer,

                         const QString &filename,

                         Rpp::RppTreeEvaluator::IncludeType includeType);

protected:

    void evaluateIncludeDirective(const IncludeDirective *directive);

    void evaluateDefineDirective(const DefineDirective *directive);

    void evaluateUndefDirective(const UndefDirective *directive);

    void evaluateIfSection(const IfSection *ifSection);

    void evaluateText(const Text *text);

    bool evaluateCondition(const ConditionalDirective *conditionalDirective);

    int evaluateExpression(Expression *expression);

    TokenEngine::TokenContainer evaluateMacro(TokenEngine::TokenContainer tokenContainer, int &identiferTokenIndex);

    TokenEngine::TokenContainer evaluateMacroInternal(QSet<QByteArray> skip, TokenEngine::TokenContainer tokenContainer);

    TokenEngine::TokenContainer cloneTokenList(const TokenEngine::TokenList &list);

    Source *getParentSource(const Item *item) const;

    IncludeType includeTypeFromDirective(

                    const IncludeDirective *includeDirective) const;

private:

    QVector<TokenEngine::TokenSection> m_tokenSections;

    DefineMap *m_activeDefinitions;

    TokenEngine::TokenSection *newlineSection;

};

class MacroFunctionParser

{

public:

    MacroFunctionParser(const TokenEngine::TokenContainer &tokenContainer, int startToken);

    bool isValid();

    int tokenCount();

    int argumentCount();

    TokenEngine::TokenSection argument(int argumentIndex);

private:

    const TokenEngine::TokenContainer &m_tokenContainer;

    const int m_startToken;

    int m_numTokens;

    bool m_valid;

    QVector<TokenEngine::TokenSection> m_arguments;

};

}//namespace Rpp

QT_END_NAMESPACE

#endif