99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/*
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* (C) Copyright The MITRE Corporation 1999 All rights reserved.
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* The program provided "as is" without any warranty express or
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* implied, including the warranty of non-infringement and the implied
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* warranties of merchantibility and fitness for a particular purpose.
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* The Copyright owner will not be liable for any damages suffered by
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* you as a result of using the Program. In no event will the Copyright
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* owner be liable for any special, indirect or consequential damages or
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* lost profits even if the Copyright owner has been advised of the
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* possibility of their occurrence.
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*
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* Please see release.txt distributed with this file for more information.
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*
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*/
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/**
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* ExprParser
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* This class is used to parse XSL Expressions
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* @author <a href="mailto:kvisco@mitre.org">Keith Visco</a>
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* @see ExprLexer
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**/
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#ifndef MITREXSL_EXPRPARSER_H
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#define MITREXSL_EXPRPARSER_H
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#include "String.h"
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#include "ExprLexer.h"
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#include "Expr.h"
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#include "FunctionLib.h"
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#include "List.h"
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#include "Names.h"
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#include <iostream.h>
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class ExprParser {
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public:
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static const String R_CURLY_BRACE;
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static const String L_CURLY_BRACE;
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/**
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* Creates a new ExprParser
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**/
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ExprParser();
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/**
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* destroys the ExprParser
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**/
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~ExprParser();
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Expr* createExpr (const String& pattern);
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PatternExpr* createPatternExpr (const String& pattern);
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LocationStep* createLocationStep(const String& path);
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/**
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* Creates an Attribute Value Template using the given value
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**/
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AttributeValueTemplate* createAttributeValueTemplate(const String& attValue);
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private:
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Expr* createBinaryExpr (Expr* left, Expr* right, Token* op);
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Expr* createExpr (ExprLexer& lexer);
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FilterExpr* createFilterExpr (ExprLexer& lexer);
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FunctionCall* createFunctionCall (ExprLexer& lexer);
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LocationStep* createLocationStep (ExprLexer& lexer);
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NodeExpr* createNodeExpr (ExprLexer& lexer);
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PathExpr* createPathExpr (ExprLexer& lexer);
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PatternExpr* createPatternExpr (ExprLexer& lexer);
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UnionExpr* createUnionExpr (ExprLexer& lexer);
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MBool isFilterExprToken (Token* tok);
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MBool isLocationStepToken (Token* tok);
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MBool isNodeTypeToken (Token* tok);
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/**
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* Using the given lexer, parses the tokens if they represent a predicate list
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* If an error occurs a non-zero String pointer will be returned containing the
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* error message.
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* @param predicateList, the PredicateList to add predicate expressions to
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* @param lexer the ExprLexer to use for parsing tokens
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* @return 0 if successful, or a String pointer to the error message
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**/
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String* parsePredicates(PredicateList* predicateList, ExprLexer& lexer);
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String* parseParameters(List* list, ExprLexer& lexer);
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}; //-- ExprParser
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#endif
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