104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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* $Id: ExprParser.h,v 1.4 2001-04-08 14:38:23 peterv%netscape.com Exp $
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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@ziplink.net">Keith Visco</A>
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* @version $Revision: 1.4 $ $Date: 2001-04-08 14:38:23 $
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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 "TxString.h"
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#include "ExprLexer.h"
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#include "Expr.h"
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#include "List.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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static short precedenceLevel (short tokenType);
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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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