#ifndef XPathParser_h
#define XPathParser_h
#include "XPathStep.h"
#include "XPathPredicate.h"
namespace WebCore {
typedef int ExceptionCode;
class XPathNSResolver;
namespace XPath {
class Expression;
class ParseNode;
class Predicate;
struct Token {
int type;
String str;
Step::Axis axis;
NumericOp::Opcode numop;
EqTestOp::Opcode eqop;
Token(int t) : type(t) {}
Token(int t, const String& v): type(t), str(v) {}
Token(int t, Step::Axis v): type(t), axis(v) {}
Token(int t, NumericOp::Opcode v): type(t), numop(v) {}
Token(int t, EqTestOp::Opcode v): type(t), eqop(v) {}
};
class Parser {
WTF_MAKE_NONCOPYABLE(Parser);
public:
Parser();
~Parser();
XPathNSResolver* resolver() const { return m_resolver.get(); }
bool expandQName(const String& qName, String& localName, String& namespaceURI);
Expression* parseStatement(const String& statement, PassRefPtr<XPathNSResolver>, ExceptionCode&);
static Parser* current() { return currentParser; }
int lex(void* yylval);
Expression* m_topExpr;
bool m_gotNamespaceError;
void registerParseNode(ParseNode*);
void unregisterParseNode(ParseNode*);
void registerPredicateVector(Vector<Predicate*>*);
void deletePredicateVector(Vector<Predicate*>*);
void registerExpressionVector(Vector<Expression*>*);
void deleteExpressionVector(Vector<Expression*>*);
void registerString(String*);
void deleteString(String*);
void registerNodeTest(Step::NodeTest*);
void deleteNodeTest(Step::NodeTest*);
private:
bool isBinaryOperatorContext() const;
void skipWS();
Token makeTokenAndAdvance(int type, int advance = 1);
Token makeTokenAndAdvance(int type, NumericOp::Opcode, int advance = 1);
Token makeTokenAndAdvance(int type, EqTestOp::Opcode, int advance = 1);
char peekAheadHelper();
char peekCurHelper();
Token lexString();
Token lexNumber();
bool lexNCName(String&);
bool lexQName(String&);
Token nextToken();
Token nextTokenInternal();
void reset(const String& data);
static Parser* currentParser;
unsigned m_nextPos;
String m_data;
int m_lastTokenType;
RefPtr<XPathNSResolver> m_resolver;
HashSet<ParseNode*> m_parseNodes;
HashSet<Vector<Predicate*>*> m_predicateVectors;
HashSet<Vector<Expression*>*> m_expressionVectors;
HashSet<String*> m_strings;
HashSet<Step::NodeTest*> m_nodeTests;
};
}
}
#endif