summaryrefslogtreecommitdiffstats
path: root/src/xmlpatterns/expr/qoptimizationpasses_p.h
diff options
context:
space:
mode:
authorLars Knoll <lars.knoll@nokia.com>2009-03-23 09:34:13 (GMT)
committerSimon Hausmann <simon.hausmann@nokia.com>2009-03-23 09:34:13 (GMT)
commit67ad0519fd165acee4a4d2a94fa502e9e4847bd0 (patch)
tree1dbf50b3dff8d5ca7e9344733968c72704eb15ff /src/xmlpatterns/expr/qoptimizationpasses_p.h
downloadQt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.zip
Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.tar.gz
Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.tar.bz2
Long live Qt!
Diffstat (limited to 'src/xmlpatterns/expr/qoptimizationpasses_p.h')
-rw-r--r--src/xmlpatterns/expr/qoptimizationpasses_p.h143
1 files changed, 143 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qoptimizationpasses_p.h b/src/xmlpatterns/expr/qoptimizationpasses_p.h
new file mode 100644
index 0000000..178ca27
--- /dev/null
+++ b/src/xmlpatterns/expr/qoptimizationpasses_p.h
@@ -0,0 +1,143 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** 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 and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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_OptimizationBlocks_H
+#define Patternist_OptimizationBlocks_H
+
+#include "qatomiccomparator_p.h"
+#include "qexpression_p.h"
+#include "qoptimizerframework_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+ /**
+ * @short Contains a set of common OptimizerPass instances.
+ *
+ * @author Frans englich <fenglich@trolltech.com>
+ * @ingroup Patternist_expressions
+ */
+ namespace OptimizationPasses
+ {
+ /**
+ * A list of OptimizerPass instances that performs the
+ * following rewrites:
+ *
+ * - <tt>count([expr]) ne 0</tt> into <tt>exists([expr])</tt>
+ * - <tt>count([expr]) != 0</tt> into <tt>exists([expr])</tt>
+ * - <tt>0 ne count([expr])</tt> into <tt>exists([expr])</tt>
+ * - <tt>0 != count([expr])</tt> into <tt>exists([expr])</tt>
+ * - <tt>count([expr]) eq 0</tt> into <tt>empty([expr])</tt>
+ * - <tt>count([expr]) = 0</tt> into <tt>empty([expr])</tt>
+ * - <tt>0 eq count([expr])</tt> into <tt>empty([expr])</tt>
+ * - <tt>0 = count([expr])</tt> into <tt>empty([expr])</tt>
+ * - <tt>count([expr]) ge 1</tt> into <tt>exists([expr])</tt>
+ * - <tt>count([expr]) >= 1</tt> into <tt>exists([expr])</tt>
+ */
+ extern OptimizationPass::List comparisonPasses;
+
+ /**
+ * A list of OptimizerPass instances that performs the
+ * following rewrites:
+ *
+ * - <tt>for $var in [expr] return $var</tt> into <tt>[expr]</tt>
+ */
+ extern OptimizationPass::List forPasses;
+
+ /**
+ * A list of OptimizerPass instances that performs the
+ * following rewrites:
+ *
+ * - <tt>if([expr of type xs:boolean]) then true() else false()</tt>
+ * into <tt>[expr of type xs:boolean]</tt>
+ */
+ extern OptimizationPass::List ifThenPasses;
+
+ /**
+ * A list of OptimizerPass instances that performs the
+ * following rewrites:
+ *
+ * - <tt>fn:not(fn:exists([expr]))</tt> into <tt>fn:empty([expr])</tt>
+ * - <tt>fn:not(fn:empty([expr]))</tt> into <tt>fn:exists([expr])</tt>
+ */
+ extern OptimizationPass::List notFN;
+
+ /**
+ * Initializes the data members in the OptimizationPasses namespace.
+ *
+ * This class is not supposed to be instantiated, but to be used via its init()
+ * function. In fact, this class cannot be instantiated.
+ *
+ * @author Frans englich <fenglich@trolltech.com>
+ */
+ class Coordinator
+ {
+ public:
+ /**
+ * Initializes the members in the OptimizationPasses namespace.
+ */
+ static void init();
+
+ private:
+ Q_DISABLE_COPY(Coordinator)
+ inline Coordinator();
+ };
+ }
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif