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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/****************************************************************************
**
** Copyright (C) 2010 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_Tokenizer_H
#define Patternist_Tokenizer_H
#include <QPair>
#include <QSharedData>
#include <QString>
#include <QUrl>
#include "qparsercontext_p.h"
#include "qtokensource_p.h"
/**
* @file
* @short Contains functions and classes used by the parser and tokenizer.
*/
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
typedef QPair<QString, Expression::Ptr> AttributeHolder;
typedef QVector<AttributeHolder> AttributeHolderVector;
class OrderSpecTransfer
{
public:
typedef QList<OrderSpecTransfer> List;
inline OrderSpecTransfer()
{
}
inline OrderSpecTransfer(const Expression::Ptr &aExpr,
const OrderBy::OrderSpec aOrderSpec) : expression(aExpr),
orderSpec(aOrderSpec)
{
Q_ASSERT(expression);
}
Expression::Ptr expression;
OrderBy::OrderSpec orderSpec;
};
/**
* @short The value the parser, but not the tokenizers, uses for tokens and
* non-terminals.
*
* It is inefficient but ensures nothing leaks, by invoking C++
* destructors even in the cases the code throws exceptions. This might be
* able to be done in a more efficient way -- suggestions are welcome.
*/
class TokenValue
{
public:
QString sval;
Expression::Ptr expr;
Expression::List expressionList;
Cardinality cardinality;
ItemType::Ptr itemType;
SequenceType::Ptr sequenceType;
FunctionArgument::List functionArguments;
FunctionArgument::Ptr functionArgument;
QVector<QXmlName> qNameVector;
QXmlName qName;
/**
* Holds enum values.
*/
EnumUnion enums;
AttributeHolder attributeHolder;
AttributeHolderVector attributeHolders;
OrderSpecTransfer::List orderSpecs;
OrderSpecTransfer orderSpec;
};
}
QT_END_NAMESPACE
/**
* Macro for the data type of semantic values; int by default.
* See section Data Types of Semantic Values.
*/
#define YYSTYPE QPatternist::TokenValue
#include "qquerytransformparser_p.h" /* This inclusion must be after TokenValue. */
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Base class for all tokenizers.
*
* The main entry point is nextToken(), which ones calls to retrieve the stream
* of tokens this Tokenizer delivers.
*
* @see <a href="http://www.w3.org/TR/xquery-xpath-parsing/">Building a
* Tokenizer for XPath or XQuery</a>
* @author Frans Englich <frans.englich@nokia.com>
*/
class Tokenizer : public TokenSource
{
public:
inline Tokenizer(const QUrl &queryU) : m_queryURI(queryU)
{
Q_ASSERT(queryU.isValid());
}
typedef QExplicitlySharedDataPointer<Tokenizer> Ptr;
/**
* Switches the Tokenizer to only do scanning, and returns complete
* strings for attribute value templates as opposed to the tokens for
* the contained expressions.
*
* The current position in the stream is returned. It can be used to
* later resume regular tokenization.
*/
virtual int commenceScanOnly() = 0;
/**
* Resumes regular parsing from @p position. The tokenizer must be in
* the scan-only state, which the commenceScanOnly() call transists to.
*
* The tokenizer will return the token POSITION_SET once after this
* function has been called.
*/
virtual void resumeTokenizationFrom(const int position) = 0;
/**
* @returns the URI of the resource being tokenized.
*/
inline const QUrl &queryURI() const
{
return m_queryURI;
}
virtual void setParserContext(const ParserContext::Ptr &parseInfo) = 0;
protected:
/**
* Returns a string representation of @p token.
*
* This function is used for debugging purposes. The implementation of
* this function is in querytransformparser.ypp.
*/
static QString tokenToString(const Token &token);
private:
Q_DISABLE_COPY(Tokenizer)
const QUrl m_queryURI;
};
}
#undef Patternist_DEBUG_PARSER // disable it for now
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
