| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** GNU Lesser General Public License Usage |
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| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| // |
| // 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_TokenSource_H |
| #define Patternist_TokenSource_H |
| |
| #include <private/qfunctionargument_p.h> |
| #include <private/qitem_p.h> |
| #include <private/qitemtype_p.h> |
| #include <private/qtokenvalue_p.h> |
| #include <private/qparsercontext_p.h> |
| #include <private/qquerytransformparser_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| template<typename T> class QQueue; |
| |
| namespace QPatternist |
| { |
| /** |
| * @short Base class for components that needs to return tokens. |
| * |
| * TokenSource represents a stream of Token instances. The end |
| * is reached when readNext() returns a Token constructed with |
| * END_OF_FILE. |
| * |
| * @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 TokenSource : public QSharedData |
| { |
| public: |
| /** |
| * typedef for the enum Bison generates that contains |
| * the token symbols. |
| */ |
| typedef XPathtokentype TokenType; |
| |
| /** |
| * Represents a token by carrying its name and value. |
| */ |
| class Token |
| { |
| public: |
| /** |
| * Constructs an invalid Token. This default constructor |
| * is need in Qt's container classes. |
| */ |
| inline Token() {} |
| inline Token(const TokenType t) : type(t) {} |
| inline Token(const TokenType t, const QString &val) : type(t), value(val) {} |
| |
| bool hasError() const |
| { |
| return type == T_ERROR; |
| } |
| |
| TokenType type; |
| QString value; |
| }; |
| |
| typedef QExplicitlySharedDataPointer<TokenSource> Ptr; |
| typedef QQueue<Ptr> Queue; |
| |
| /** |
| * The C++ compiler cannot synthesize it when we use the |
| * Q_DISABLE_COPY() macro. |
| */ |
| inline TokenSource() |
| { |
| } |
| |
| virtual ~TokenSource(); |
| |
| /** |
| * @returns the next token. |
| */ |
| virtual Token nextToken(XPATHLTYPE *const sourceLocator) = 0; |
| |
| private: |
| Q_DISABLE_COPY(TokenSource) |
| }; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |