qtypechecker_p.h

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//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.

#ifndef Patternist_TypeChecker_H
#define Patternist_TypeChecker_H

#include "qstaticcontext_p.h"
#include "qexpression_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    class TypeChecker
    {
    public:
        enum Option
        {
            AutomaticallyConvert = 1,

            CheckFocus = 2,

            GeneratePromotion
        };
        typedef QFlags<Option> Options;

        static Expression::Ptr
        applyFunctionConversion(const Expression::Ptr &operand,
                                const SequenceType::Ptr &reqType,
                                const StaticContext::Ptr &context,
                                const ReportContext::ErrorCode code = ReportContext::XPTY0004,
                                const Options = Options(AutomaticallyConvert | CheckFocus));
    private:

        static inline Expression::Ptr typeCheck(Expression *const op,
                                                const StaticContext::Ptr &context,
                                                const SequenceType::Ptr &reqType);
        static Expression::Ptr verifyType(const Expression::Ptr &operand,
                                          const SequenceType::Ptr &reqSeqType,
                                          const StaticContext::Ptr &context,
                                          const ReportContext::ErrorCode code,
                                          const Options options);

        static bool promotionPossible(const ItemType::Ptr &fromType,
                                      const ItemType::Ptr &toType,
                                      const StaticContext::Ptr &context);

        static inline QString wrongType(const NamePool::Ptr &np,
                                        const ItemType::Ptr &reqType,
                                        const ItemType::Ptr &opType);

        inline TypeChecker();

        Q_DISABLE_COPY(TypeChecker)
    };
}

QT_END_NAMESPACE

QT_END_HEADER

#endif