qpatternplatform_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_PatternPlatform_H
#define Patternist_PatternPlatform_H

#include <QFlags>
#include <QRegExp>

#include "qfunctioncall_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    class PatternPlatform : public FunctionCall
    {
    public:
        enum Flag
        {
            NoFlags             = 0,

            DotAllMode          = 1,

            MultiLineMode       = 2,

            CaseInsensitive     = 4,

            SimplifyWhitespace  = 8
        };
        typedef QFlags<Flag> Flags;

        virtual Expression::Ptr compress(const StaticContext::Ptr &context);

        const QRegExp pattern(const DynamicContext::Ptr &context) const;

        inline int captureCount() const;

        static QRegExp parsePattern(const QString &pattern,
                                    const ReportContext::Ptr &context,
                                    const SourceLocationReflection *const location);


    protected:
        PatternPlatform(const qint8 flagsPosition);

    private:
        enum PreCompiledPart
        {
            NoPart          = 0,
            PatternPrecompiled     = 1,
            FlagsPrecompiled       = 2,
            FlagsAndPattern = PatternPrecompiled | FlagsPrecompiled

        };
        typedef QFlags<PreCompiledPart> PreCompiledParts;

        inline QRegExp parsePattern(const QString &pattern,
                                    const ReportContext::Ptr &context) const;

        Q_DISABLE_COPY(PatternPlatform)

        Flags parseFlags(const QString &flags,
                         const DynamicContext::Ptr &context) const;

        static void applyFlags(const Flags flags, QRegExp &pattern);

        PreCompiledParts    m_compiledParts;
        Flags               m_flags;
        QRegExp             m_pattern;
        const qint8         m_flagsPosition;
    };

    inline int PatternPlatform::captureCount() const
    {
        if(m_compiledParts.testFlag(PatternPrecompiled))
            return m_pattern.captureCount();
        else
            return -1;
    }

    Q_DECLARE_OPERATORS_FOR_FLAGS(PatternPlatform::Flags)
}

QT_END_NAMESPACE

QT_END_HEADER

#endif