1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 // 41 // W A R N I N G 42 // ------------- 43 // 44 // This file is not part of the Qt API. It exists purely as an 45 // implementation detail. This header file may change from version to 46 // version without notice, or even be removed. 47 // 48 // We mean it. 49 50 #ifndef Patternist_CollationChecker_H 51 #define Patternist_CollationChecker_H 52 53 #include <private/qsinglecontainer_p.h> 54 55 QT_BEGIN_NAMESPACE 56 57 namespace QPatternist 58 { 59 /** 60 * @short Checks that its operand evaluates to a supported string collation. 61 * 62 * CollationChecker is inserted in the AST when an Expression has LastOperandIsCollation 63 * set. If the argument that CollationChecker is a string literal the CollationChecker 64 * will const-fold as usual, but otherwise will simply pipe through the value of its argument, 65 * if it's a supported collation. Otherwise it raise an error, with code ReportContext::FOCH0002. 66 * 67 * @author Frans Englich <frans.englich@nokia.com> 68 * @ingroup Patternist_expressions 69 */ 70 class CollationChecker : public SingleContainer 71 { 72 public: 73 CollationChecker(const Expression::Ptr &source); 74 75 virtual Item evaluateSingleton(const DynamicContext::Ptr &) const; 76 77 /** 78 * Expects exactly one string. 79 */ 80 virtual SequenceType::List expectedOperandTypes() const; 81 82 /** 83 * @returns its operand's static type. 84 */ 85 virtual SequenceType::Ptr staticType() const; 86 87 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; 88 }; 89 } 90 91 QT_END_NAMESPACE 92 93 #endif 94