blob: b0868d521a8717ff4e03edbadba09af307ca3867 (
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
153
154
155
156
157
158
159
160
|
/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcontextitem_p.h"
#include "qcommonsequencetypes_p.h"
#include "qemptysequence_p.h"
#include "qfunctionsignature_p.h"
#include "qgenericsequencetype_p.h"
#include "qcollationchecker_p.h"
#include "qcommonnamespaces_p.h"
#include "qfunctioncall_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
SequenceType::List FunctionCall::expectedOperandTypes() const
{
const FunctionArgument::List args(signature()->arguments());
FunctionArgument::List::const_iterator it(args.constBegin());
const FunctionArgument::List::const_iterator end(args.constEnd());
// TODO reserve/resize()
SequenceType::List result;
for(; it != end; ++it)
result.append((*it)->type());
return result;
}
Expression::Ptr FunctionCall::typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType)
{
/* We don't cache properties() at some stages because it can be invalidated
* by the typeCheck(). */
const FunctionSignature::Arity maxArgs = signature()->maximumArguments();
/* We do this before the typeCheck() such that the appropriate conversions
* are applied to the ContextItem. */
if(m_operands.count() < maxArgs &&
has(UseContextItem))
{
m_operands.append(Expression::Ptr(new ContextItem()));
context->wrapExpressionWith(this, m_operands.last());
}
const Expression::Ptr me(UnlimitedContainer::typeCheck(context, reqType));
if(me != this)
return me;
const Properties props(properties());
if(props.testFlag(RewriteToEmptyOnEmpty) &&
*CommonSequenceTypes::Empty == *m_operands.first()->staticType()->itemType())
{
return EmptySequence::create(this, context);
}
if(props.testFlag(LastOperandIsCollation) &&
m_operands.count() == maxArgs)
{
m_operands.last() = Expression::Ptr(new CollationChecker(m_operands.last()));
context->wrapExpressionWith(this, m_operands.last());
}
return me;
}
void FunctionCall::setSignature(const FunctionSignature::Ptr &sign)
{
m_signature = sign;
}
FunctionSignature::Ptr FunctionCall::signature() const
{
Q_ASSERT(m_signature); /* It really should be set. */
return m_signature;
}
SequenceType::Ptr FunctionCall::staticType() const
{
Q_ASSERT(m_signature);
if(has(EmptynessFollowsChild))
{
if(m_operands.isEmpty())
{
/* This is a function which uses the context item when having no arguments. */
return signature()->returnType();
}
const Cardinality card(m_operands.first()->staticType()->cardinality());
if(card.allowsEmpty())
return signature()->returnType();
else
{
/* Remove empty. */
return makeGenericSequenceType(signature()->returnType()->itemType(),
card & Cardinality::oneOrMore());
}
}
return signature()->returnType();
}
Expression::Properties FunctionCall::properties() const
{
Q_ASSERT(m_signature);
return signature()->properties();
}
ExpressionVisitorResult::Ptr FunctionCall::accept(const ExpressionVisitor::Ptr &visitor) const
{
return visitor->visit(this);
}
Expression::ID FunctionCall::id() const
{
Q_ASSERT(m_signature);
return m_signature->id();
}
QT_END_NAMESPACE
|
