In ThingManager, you have a thingSet member, not a thingList. Your function definitions reference a "thingList", which is not defined. -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx]On Behalf Of Smith-Rowland, Edward M Sent: Tuesday, August 29, 2006 5:17 PM To: gcc-help@xxxxxxxxxxx Subject: Static set member. All, I am attempting to create a singleton class something like this: class ThingManager { static void show( Thing * thng ); static void hide( Thing * thng ); static void hideAll( void ); private: static std::set<Thing *,ThingComp> thingSet; }; I get these errors: [ed@localhost ~]$ g++ thing.cpp thing.cpp: In static member function `static void ThingManager::show(Thing*)': thing.cpp:7: error: `thingList' was not declared in this scope thing.cpp: In static member function `static void ThingManager::hide(Thing*)': thing.cpp:13: error: `thingList' was not declared in this scope thing.cpp: In static member function `static void ThingManager::hideAll()': thing.cpp:19: error: `thingList' was not declared in this scope More details (still simple) in the attached files. What am I doing wrong??? Adding a constructor or initializer to the cpp file is an error: std::set<Thing *,ThingComp> ThingManager::thingSet(); Ed
