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TagexprParser.h

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00001 #ifndef TAGCOLL_TAGEXPR_PARSER_H
00002 #define TAGCOLL_TAGEXPR_PARSER_H
00003 
00004 /*
00005  * Parser for tag expressions
00006  *
00007  * Copyright (C) 2003  Enrico Zini <enrico@debian.org>
00008  *
00009  * This library is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU Lesser General Public
00011  * License as published by the Free Software Foundation; either
00012  * version 2.1 of the License, or (at your option) any later version.
00013  *
00014  * This library is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017  * Lesser General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public
00020  * License along with this library; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
00022  */
00023 
00024 #include <tagcoll/tagexpr/Tagexpr.h>
00025 #include <string>
00026 
00027 namespace Tagcoll
00028 {
00029 
00030 class TagexprParser
00031 {
00032 protected:
00033     static TagexprParser* _instance;
00034 
00035     Tagexpr* result;
00036     std::string errorMessage;
00037     
00038 public:
00039     // For use by the bison+yacc code
00040     void setResult(Tagexpr* result) throw () { this->result = result; }
00041     void addError(const std::string& message) throw () { errorMessage += message; }
00042 
00043     // For use by the wide public
00044     Tagexpr* parse(const std::string& buffer) throw ();
00045 
00046     // Get the error message for a failed parse
00047     const std::string& getErrorMessage() const throw () { return errorMessage; }
00048     std::string getErrorMessage() throw () { return errorMessage; }
00049 
00050     static TagexprParser* instance() throw ();
00051 };
00052 
00053 };
00054 
00055 // vim:set ts=4 sw=4:
00056 #endif

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