Predefined Function Objects

• less<int>

  • set<int> coll; is expanded to
  • set<int, less<int> > coll; // sort elements with <

• greater<int>

  • set<int, greater<int> > coll; // sort elem with >

• negate<int>

  • transform (coll.begin( ), coll.end( ), coll.begin( ),
  • negate<int>( ) );

• And others