/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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** GNU Lesser General Public License Usage
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
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** file. Please review the following information to ensure the GNU General
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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_AndExpression_H
#define Patternist_AndExpression_H

#include <private/qpaircontainer_p.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{

    /**
     * @short Implements XPath 2.0's logical expression @c and.
     *
     * The @c and expression is the same in XQuery 1.0 as in XPath 2.0.
     *
     * @see <a href="http://www.w3.org/TR/xpath20/#id-logical-expressions">XML Path Language
     * (XPath) 2.0, 3.6 Logical Expressions</a>
     * @author Frans Englich <frans.englich@nokia.com>
     * @ingroup Patternist_expressions
     */
    class AndExpression : public PairContainer
    {
    public:
        AndExpression(const Expression::Ptr &operand1,
                      const Expression::Ptr &operand2);

        virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;

        virtual SequenceType::List expectedOperandTypes() const;

        virtual Expression::Ptr compress(const StaticContext::Ptr &context);
        /**
         * @returns always CommonSequenceTypes::ExactlyOneBoolean
         */
        virtual SequenceType::Ptr staticType() const;

        virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
    };
}

QT_END_NAMESPACE

QT_END_HEADER

#endif