source: trunk/yao/share/antlr-2.7.7/lib/csharp/antlr.runtime/antlr/NoViableAltException.cs @ 1

using System;

using AST                                       = antlr.collections.AST;

namespace antlr
{
        /*ANTLR Translator Generator
        * Project led by Terence Parr at http://www.jGuru.com
        * Software rights: http://www.antlr.org/license.html
        *
        * $Id:$
        */

        //
        // ANTLR C# Code Generator by Micheal Jordan
        //                            Kunle Odutola       : kunle UNDERSCORE odutola AT hotmail DOT com
        //                            Anthony Oguntimehin
        //
        // With many thanks to Eric V. Smith from the ANTLR list.
        //
        
        [Serializable]
        public class NoViableAltException : RecognitionException
        {
                public IToken token;
                public AST node; // handles parsing and treeparsing
                
                public NoViableAltException(AST t) : base("NoViableAlt", "<AST>", - 1, - 1)
                {
                        node = t;
                }
                
                public NoViableAltException(IToken t, string fileName_) : 
                                        base("NoViableAlt", fileName_, t.getLine(), t.getColumn())
                {
                        token = t;
                }
                
                /*
                * Returns a clean error message (no line number/column information)
                */
                override public string Message
                {
                        get 
                        {
                                if (token != null)
                                {
                                        //return "unexpected token: " + token.getText();
                                        return "unexpected token: " + token.ToString();
                                }
                        
                                // must a tree parser error if token==null
                                if ( (node==null) || (node==TreeParser.ASTNULL) )
                                {
                                        return "unexpected end of subtree";
                                }
                                return "unexpected AST node: " + node.ToString();
                        }
                }
        }
}