blob: 93d4a47fbc19997adbc905c65efc31dca6c1f032 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcommonsequencetypes_p.h"
#include "qgenericsequencetype_p.h"
#include "qoptimizationpasses_p.h"
#include "qifthenclause_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
IfThenClause::IfThenClause(const Expression::Ptr &test,
const Expression::Ptr &then,
const Expression::Ptr &el) : TripleContainer(test, then, el)
{
}
Item::Iterator::Ptr IfThenClause::evaluateSequence(const DynamicContext::Ptr &context) const
{
return m_operand1->evaluateEBV(context)
? m_operand2->evaluateSequence(context)
: m_operand3->evaluateSequence(context);
}
Item IfThenClause::evaluateSingleton(const DynamicContext::Ptr &context) const
{
return m_operand1->evaluateEBV(context)
? m_operand2->evaluateSingleton(context)
: m_operand3->evaluateSingleton(context);
}
bool IfThenClause::evaluateEBV(const DynamicContext::Ptr &context) const
{
return m_operand1->evaluateEBV(context)
? m_operand2->evaluateEBV(context)
: m_operand3->evaluateEBV(context);
}
void IfThenClause::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const
{
if(m_operand1->evaluateEBV(context))
m_operand2->evaluateToSequenceReceiver(context);
else
m_operand3->evaluateToSequenceReceiver(context);
}
Expression::Ptr IfThenClause::compress(const StaticContext::Ptr &context)
{
const Expression::Ptr me(TripleContainer::compress(context));
if(me != this)
return me;
/* All operands mustn't be evaluated in order for const folding to
* be possible. Let's see how far we get. */
if(m_operand1->isEvaluated())
{
if(m_operand1->evaluateEBV(context->dynamicContext()))
return m_operand2;
else
return m_operand3;
}
else
return me;
}
QList<QExplicitlySharedDataPointer<OptimizationPass> > IfThenClause::optimizationPasses() const
{
return OptimizationPasses::ifThenPasses;
}
SequenceType::List IfThenClause::expectedOperandTypes() const
{
SequenceType::List result;
result.append(CommonSequenceTypes::EBV);
result.append(CommonSequenceTypes::ZeroOrMoreItems);
result.append(CommonSequenceTypes::ZeroOrMoreItems);
return result;
}
SequenceType::Ptr IfThenClause::staticType() const
{
const SequenceType::Ptr t1(m_operand2->staticType());
const SequenceType::Ptr t2(m_operand3->staticType());
return makeGenericSequenceType(t1->itemType() | t2->itemType(),
t1->cardinality() | t2->cardinality());
}
ExpressionVisitorResult::Ptr IfThenClause::accept(const ExpressionVisitor::Ptr &visitor) const
{
return visitor->visit(this);
}
Expression::ID IfThenClause::id() const
{
return IDIfThenClause;
}
/*
Expression::Properties IfThenClause::properties() const
{
return m_operand1->properties()
| m_operand2->properties()
| m_operand3->properties()
& ( Expression::RequiresFocus
| Expression::IsEvaluated
| Expression::DisableElimination);
}
*/
QT_END_NAMESPACE
|
