00001 #ifndef TAGCOLL_TAGEXPR_PARSER_H 00002 #define TAGCOLL_TAGEXPR_PARSER_H 00003 00004 /* \file 00005 * Parser for tag expressions 00006 */ 00007 00008 /* 00009 * Copyright (C) 2003,2004,2005 Enrico Zini <enrico@debian.org> 00010 * 00011 * This library is free software; you can redistribute it and/or 00012 * modify it under the terms of the GNU Lesser General Public 00013 * License as published by the Free Software Foundation; either 00014 * version 2.1 of the License, or (at your option) any later version. 00015 * 00016 * This library is distributed in the hope that it will be useful, 00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00019 * Lesser General Public License for more details. 00020 * 00021 * You should have received a copy of the GNU Lesser General Public 00022 * License along with this library; if not, write to the Free Software 00023 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00024 */ 00025 00026 #include <tagcoll/expression.h> 00027 #include <string> 00028 00029 namespace tagcoll 00030 { 00031 00038 /* 00039 * Design note: it needs to be a singleton class to be accessed by bison's 00040 * global parse function. 00041 */ 00042 class TagexprParser 00043 { 00044 private: 00045 TagexprParser() {} 00046 00047 protected: 00048 static TagexprParser* _instance; 00049 00050 Expression result; 00051 std::string errorMessage; 00052 00053 public: 00054 // For use by the bison+yacc code 00055 void setResult(const Expression& result) { this->result = result; } 00056 void addError(const std::string& message) { errorMessage += message; } 00057 00068 Expression parse(const std::string& buffer); 00069 00073 static TagexprParser* instance(); 00074 }; 00075 00076 }; 00077 00078 // vim:set ts=4 sw=4: 00079 #endif