public static void Flag(ICodeNode node, RuntimeErrorCode error_code, MessageProducer backend)
{
//string line_number = null;
while (node != null && node.GetAttribute(ICodeKey.LINE) == null)
{
node = node.Parent;
}
// notify observers
var args = (Tuple<string, int>)Tuple.Create(error_code.Message, (int)node.GetAttribute(ICodeKey.LINE));
Message msg = new Message(MessageType.RuntimeError, args);
backend.Send(msg);
if (++Errors > MAX_ERRORS)
{
Console.WriteLine("*** ABORTED AFTER TOO MANY RUNTIME ERRORS.*");
Environment.Exit(-1);
}
}
internal static Token Synchronize(HashSet<TokenType> types, Scanner scanner, MessageProducer mp)
{
Token tok = scanner.CurrentToken;
// if the current token is not in the synchronization set
// then it is unexpected and the parser must recover.
if (!types.Contains(tok.TokenType))
{
// flag the unexpected token
ErrorHandler.Flag(tok, ErrorCode.UNEXPECTED_TOKEN, mp);
// recover by skipping tokens that are not in
// the synchronization set.
do
{
tok = scanner.GetNextToken();
} while (!tok.IsEof && !types.Contains(tok.TokenType));
}
return tok;
}
