// Build don't link: // Origin: "Chen, Wen-Ke" <chwk@cs.arizona.edu> template <class T> bool operator!=(const T&, const T&); enum MsgType { MSG_DATA }; class C { public: MsgType mType : 8; }; int main(void) { extern C& c; c.mType = MSG_DATA; if (c.mType != MSG_DATA) return -1; return 0; }