Hi All I write template class with operator: operator !() const { return (NULL == get()); } My gcc compiler return error: ISO C++ forbids declaration of 'operator!' with no type But, on windows, build is OK without any warning or error. How i can fix this error. Please help me. Best Regards Kolesar -- View this message in context: http://www.nabble.com/ISO-C%2B%2B-forbids-declaration-of-%27operator%21%27-with-no-type-tp21681331p21681331.html Sent from the gcc - Help mailing list archive at Nabble.com.