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

using System;
using StringBuilder                             = System.Text.StringBuilder;

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 NoViableAltForCharException : RecognitionException
        {
                public char foundChar;
                
                public NoViableAltForCharException(char c, CharScanner scanner) :
                                        base("NoViableAlt", scanner.getFilename(), scanner.getLine(), scanner.getColumn())
                {
                        foundChar = c;
                }
                
                public NoViableAltForCharException(char c, string fileName, int line, int column) : 
                                        base("NoViableAlt", fileName, line, column)
                {
                        foundChar = c;
                }
                
                /*
                * Returns a clean error message (no line number/column information)
                */
                override public string Message
                {
                        get
                        {
                                StringBuilder mesg = new StringBuilder("unexpected char: ");
                        
                                // I'm trying to mirror a change in the C++ stuff.
                                // But java seems to lack something isprint-ish..
                                // so we do it manually. This is probably too restrictive.
                        
                                if ((foundChar >= ' ') && (foundChar <= '~'))
                                {
                                        mesg.Append('\'');
                                        mesg.Append(foundChar);
                                        mesg.Append('\'');
                                }
                                else
                                {
                                        mesg.Append("0x");
                                        mesg.Append(((int)foundChar).ToString("X"));
                                }
                                return mesg.ToString();
                        }
                }
        }
}