82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/*
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* Copyright 2005 Maksim Orlovich <maksim@kde.org>
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* Copyright (C) 2006, 2013 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ExceptionOr.h"
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#include "XPathPredicate.h"
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union YYSTYPE;
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namespace WebCore {
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class XPathNSResolver;
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namespace XPath {
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class Parser {
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WTF_MAKE_NONCOPYABLE(Parser);
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public:
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static ExceptionOr<std::unique_ptr<Expression>> parseStatement(const String& statement, RefPtr<XPathNSResolver>&&);
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int lex(YYSTYPE&);
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bool expandQualifiedName(const String& qualifiedName, String& localName, String& namespaceURI);
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void setParseResult(std::unique_ptr<Expression>&& expression) { m_result = WTFMove(expression); }
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private:
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Parser(const String&, RefPtr<XPathNSResolver>&&);
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struct Token;
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bool isBinaryOperatorContext() const;
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void skipWS();
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Token makeTokenAndAdvance(int type, int advance = 1);
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Token makeTokenAndAdvance(int type, NumericOp::Opcode, int advance = 1);
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Token makeTokenAndAdvance(int type, EqTestOp::Opcode, int advance = 1);
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char peekAheadHelper();
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char peekCurHelper();
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Token lexString();
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Token lexNumber();
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bool lexNCName(String&);
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bool lexQName(String&);
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Token nextToken();
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Token nextTokenInternal();
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const String& m_data;
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RefPtr<XPathNSResolver> m_resolver;
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unsigned m_nextPos { 0 };
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int m_lastTokenType { 0 };
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std::unique_ptr<Expression> m_result;
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bool m_sawNamespaceError { false };
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};
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} }
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