OnError
virtual void OnError(const BString& msg, int line, int col) = 0;
fListener->OnError("out of memory", 0, 0);
fListener->OnError(error.message, 1, offset);
fListener->OnError("out of memory", 0, 0);
fListener->OnError(error.message, 1, offset);
fListener->OnError("out of memory", 0, 0);
fListener->OnError(error.message, line, column + 1);
fListener->OnError("out of memory", 0, 0);
fListener->OnError(error.message, 1, offset);