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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 226 insertions, 0 deletions

diff --git a/src/xmlpatterns/expr/qoptimizerblocks_p.h b/src/xmlpatterns/expr/qoptimizerblocks_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  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_OptimizerBlocks_H
+#define Patternist_OptimizerBlocks_H
+
+#include "qatomiccomparator_p.h"
+#include "qexpression_p.h"
+#include "qoptimizerframework_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    /**
+     * @short Identifies Expression instances by their Expression::id().
+     *
+     * @author Frans englich <frans.englich@nokia.com>
+     * @ingroup Patternist_expressions
+     */
+    class ByIDIdentifier : public ExpressionIdentifier
+    {
+    public:
+        ByIDIdentifier(const Expression::ID id);
+        virtual bool matches(const Expression::Ptr &expr) const;
+    private:
+        const Expression::ID m_id;
+    };
+
+    /**
+     * @short Identifies Expression instances based on their static type.
+     *
+     * BySequenceTypeIdentifier identifies Expression instances
+     * if their Expression::staticType() matches the requested one,
+     * regardless of whether the Expression is a particular one, such
+     * as AndExpression.
+     *
+     * For example, constructing a BySequenceTypeIdentifier while
+     * passing CommonSequenceTypes::EBV in its constructor will create
+     * a ExpressionIdentifier that returns @c true for a static type with
+     * item type <tt>xs:string</tt>, but returns @c false for a static type involving
+     * <tt>xs:date</tt>.
+     *
+     * @author Frans englich <frans.englich@nokia.com>
+     * @ingroup Patternist_expressions
+     */
+    class BySequenceTypeIdentifier : public ExpressionIdentifier
+    {
+    public:
+        BySequenceTypeIdentifier(const SequenceType::Ptr &seqType);
+
+        /**
+         * @returns @c true, if the static type of @p expr is matches
+         * the SequenceType passed in the BySequenceTypeIdentifier()
+         * constructor, otherwise @c false.
+         */
+        virtual bool matches(const Expression::Ptr &expr) const;
+
+    private:
+        const SequenceType::Ptr m_seqType;
+    };
+
+    /**
+     * @short Determines whether an Expression is a value or general comparison or both,
+     * with a certain operator.
+     *
+     * @author Frans englich <frans.englich@nokia.com>
+     * @ingroup Patternist_expressions
+     */
+    class ComparisonIdentifier : public ExpressionIdentifier
+    {
+    public:
+
+        /**
+         * @param comparatorHosts the possible parent that may have
+         * the operator. This may be Expression::IDGeneralComparison or
+         * Expression::IDValueComparison. The two values may also be OR'd,
+         * meaning any of them will do.
+         *
+         * @param op the operator that the comparator host must have. For example,
+         * if @p op is AtomicComparator::OperatorGreatorOrEqual this ComparisonIdentifier
+         * will match operator >= in the case of IDGeneralComparison and 'ge' in the
+         * case of IDValueComparison.
+         */
+        ComparisonIdentifier(const QVector<Expression::ID> comparatorHosts,
+                             const AtomicComparator::Operator op);
+
+        /**
+         * @returns @c true, if @p expr is a ValueComparison with the operator
+         * passed in ComparisonIdentifier().
+         */
+        virtual bool matches(const Expression::Ptr &expr) const;
+
+    private:
+        const QVector<Expression::ID> m_hosts;
+        const AtomicComparator::Operator m_op;
+    };
+
+    /**
+     * @short Matches numeric literals that are of type xs:integer and
+     * has a specific value.
+     *
+     * For example IntegerIdentifier(4) would match the former but
+     * not the latter operand in this expression: "4 + 5".
+     *
+     * @author Frans englich <frans.englich@nokia.com>
+     * @ingroup Patternist_expressions
+     */
+    class IntegerIdentifier : public ExpressionIdentifier
+    {
+    public:
+        IntegerIdentifier(const xsInteger num);
+        virtual bool matches(const Expression::Ptr &expr) const;
+
+    private:
+        const xsInteger m_num;
+    };
+
+    /**
+     * @short Matches boolean literals.
+     *
+     * For example BooleanIdentifier(true) would match the former but
+     * not the latter operand in this expression: "true() + false()".
+     *
+     * @author Frans englich <frans.englich@nokia.com>
+     * @ingroup Patternist_expressions
+     */
+    class BooleanIdentifier : public ExpressionIdentifier
+    {
+    public:
+        BooleanIdentifier(const bool value);
+        virtual bool matches(const Expression::Ptr &expr) const;
+
+    private:
+        const bool m_value;
+    };
+
+    /**
+     * @short Creates a particular Expression instance identified by an Expression::ID.
+     *
+     * For example, if ByIDCreator() is passed Expression::IDCountFN, create()
+     * will return CountFN instances.
+     *
+     * @author Frans englich <frans.englich@nokia.com>
+     * @ingroup Patternist_expressions
+     */
+    class ByIDCreator : public ExpressionCreator
+    {
+    public:
+        /**
+         * Creates a ByIDCreator that creates expressions
+         * of the type that @p id identifies.
+         */
+        ByIDCreator(const Expression::ID id);
+        virtual Expression::Ptr create(const Expression::List &operands,
+                                       const StaticContext::Ptr &context,
+                                       const SourceLocationReflection *const r) const;
+
+        /**
+         * Creates an expression by id @p id with the arguments @p operands.
+         */
+        static Expression::Ptr create(const Expression::ID id,
+                                      const Expression::List &operands,
+                                      const StaticContext::Ptr &context,
+                                      const SourceLocationReflection *const r);
+
+    private:
+        const Expression::ID m_id;
+    };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif