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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 // |
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43 // W A R N I N G |
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44 // ------------- |
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45 // |
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46 // This file is not part of the Qt API. It exists purely as an |
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47 // implementation detail. This header file may change from version to |
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48 // version without notice, or even be removed. |
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49 // |
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50 // We mean it. |
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51 |
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52 #ifndef Patternist_TokenSource_H |
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53 #define Patternist_TokenSource_H |
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54 |
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55 #include "qatomiccomparator_p.h" |
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56 #include "qatomicmathematician_p.h" |
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57 #include "qcombinenodes_p.h" |
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58 #include "qfunctionargument_p.h" |
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59 #include "qitem_p.h" |
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60 #include "qitemtype_p.h" |
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61 #include "qorderby_p.h" |
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62 #include "qpath_p.h" |
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63 #include "qquerytransformparser_p.h" |
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64 #include "qvalidate_p.h" |
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65 |
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66 QT_BEGIN_HEADER |
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67 |
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68 QT_BEGIN_NAMESPACE |
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69 |
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70 template<typename T> class QQueue; |
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71 |
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72 namespace QPatternist |
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73 { |
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74 /** |
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75 * @short A union of all the enums the parser uses. |
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76 */ |
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77 union EnumUnion |
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78 { |
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79 AtomicComparator::Operator valueOperator; |
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80 AtomicMathematician::Operator mathOperator; |
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81 CombineNodes::Operator combinedNodeOp; |
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82 QXmlNodeModelIndex::Axis axis; |
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83 QXmlNodeModelIndex::DocumentOrder nodeOperator; |
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84 StaticContext::BoundarySpacePolicy boundarySpacePolicy; |
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85 StaticContext::ConstructionMode constructionMode; |
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86 StaticContext::OrderingEmptySequence orderingEmptySequence; |
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87 StaticContext::OrderingMode orderingMode; |
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88 OrderBy::OrderSpec::Direction sortDirection; |
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89 Validate::Mode validationMode; |
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90 VariableSlotID slot; |
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91 int tokenizerPosition; |
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92 qint16 zeroer; |
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93 bool Bool; |
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94 xsDouble Double; |
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95 Path::Kind pathKind; |
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96 }; |
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97 |
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98 /** |
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99 * @short Base class for components that needs to return tokens. |
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100 * |
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101 * TokenSource represents a stream of Token instances. The end |
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102 * is reached when readNext() returns a Token constructed with |
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103 * END_OF_FILE. |
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104 * |
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105 * @see <a href="http://www.w3.org/TR/xquery-xpath-parsing/">Building a |
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106 * Tokenizer for XPath or XQuery</a> |
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107 * @author Frans Englich <frans.englich@nokia.com> |
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108 */ |
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109 class TokenSource : public QSharedData |
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110 { |
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111 public: |
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112 /** |
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113 * typedef for the enum Bison generates that contains |
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114 * the token symbols. |
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115 */ |
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116 typedef yytokentype TokenType; |
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117 |
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118 /** |
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119 * Represents a token by carrying its name and value. |
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120 */ |
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121 class Token |
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122 { |
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123 public: |
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124 /** |
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125 * Constructs an invalid Token. This default constructor |
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126 * is need in Qt's container classes. |
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127 */ |
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128 inline Token() {} |
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129 inline Token(const TokenType t) : type(t) {} |
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130 inline Token(const TokenType t, const QString &val) : type(t), value(val) {} |
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131 |
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132 bool hasError() const |
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133 { |
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134 return type == ERROR; |
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135 } |
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136 |
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137 TokenType type; |
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138 QString value; |
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139 }; |
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140 |
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141 typedef QExplicitlySharedDataPointer<TokenSource> Ptr; |
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142 typedef QQueue<Ptr> Queue; |
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143 |
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144 /** |
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145 * The C++ compiler cannot synthesize it when we use the |
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146 * Q_DISABLE_COPY() macro. |
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147 */ |
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148 inline TokenSource() |
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149 { |
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150 } |
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151 |
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152 virtual ~TokenSource(); |
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153 |
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154 /** |
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155 * @returns the next token. |
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156 */ |
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157 |
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158 virtual Token nextToken(YYLTYPE *const sourceLocator) = 0; |
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159 |
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160 private: |
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161 Q_DISABLE_COPY(TokenSource) |
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162 }; |
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163 } |
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164 |
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165 QT_END_NAMESPACE |
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166 |
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167 QT_END_HEADER |
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168 |
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169 #endif |