1 /****************************************************************************
2 **
3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
5 **
6 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see https://www.qt.io/terms-conditions. For further
15 ** information use the contact form at https://www.qt.io/contact-us.
16 **
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 3 as published by the Free Software
20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the
21 ** packaging of this file. Please review the following information to
22 ** ensure the GNU Lesser General Public License version 3 requirements
23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24 **
25 ** GNU General Public License Usage
26 ** Alternatively, this file may be used under the terms of the GNU
27 ** General Public License version 2.0 or (at your option) the GNU General
28 ** Public license version 3 or any later version approved by the KDE Free
29 ** Qt Foundation. The licenses are as published by the Free Software
30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31 ** included in the packaging of this file. Please review the following
32 ** information to ensure the GNU General Public License requirements will
33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34 ** https://www.gnu.org/licenses/gpl-3.0.html.
35 **
36 ** $QT_END_LICENSE$
37 **
38 ****************************************************************************/
39
40 #include "qboolean_p.h"
41 #include "qcommonvalues_p.h"
42 #include "qliteral_p.h"
43
44 #include "qorexpression_p.h"
45
46 QT_BEGIN_NAMESPACE
47
48 using namespace QPatternist;
49
OrExpression(const Expression::Ptr & operand1,const Expression::Ptr & operand2)50 OrExpression::OrExpression(const Expression::Ptr &operand1,
51 const Expression::Ptr &operand2) : AndExpression(operand1, operand2)
52 {
53 }
54
evaluateEBV(const DynamicContext::Ptr & context) const55 bool OrExpression::evaluateEBV(const DynamicContext::Ptr &context) const
56 {
57 return m_operand1->evaluateEBV(context) || m_operand2->evaluateEBV(context);
58 }
59
compress(const StaticContext::Ptr & context)60 Expression::Ptr OrExpression::compress(const StaticContext::Ptr &context)
61 {
62 const Expression::Ptr newMe(PairContainer::compress(context));
63
64 if(newMe != this)
65 return newMe;
66
67 /* Both operands mustn't be evaluated in order to be able to compress. */
68 if(m_operand1->isEvaluated() && m_operand1->evaluateEBV(context->dynamicContext()))
69 return wrapLiteral(CommonValues::BooleanTrue, context, this);
70 else if(m_operand2->isEvaluated() && m_operand2->evaluateEBV(context->dynamicContext()))
71 return wrapLiteral(CommonValues::BooleanTrue, context, this);
72 else
73 return Expression::Ptr(this);
74 }
75
accept(const ExpressionVisitor::Ptr & visitor) const76 ExpressionVisitorResult::Ptr OrExpression::accept(const ExpressionVisitor::Ptr &visitor) const
77 {
78 return visitor->visit(this);
79 }
80
81 QT_END_NAMESPACE
82