Hello, because of the lack of a generic adaptor which indirects operations on pointers to the pointees, i.e. sorting a collection of pointers with predicates applying to the pointees, I have come up with two classes, indirecter_unary and indirecter_binary which do exactly that (thanks again to the people from boost users and comp.lang.c++ for assisting me). Both adaptors accept adaptable function objects as well as plain functions. Ex.: inline int plus( int a, int b ) { return a + b; } // ... std::vector<int> vec; // ... std::sort(vec.begin(),vec.end(),indirect_binary(std::less<int>())); // ... std::transform(vec.begin(),vec.end(),vec.begin(),std::ostream_iterator<int>(std::cout,"\n"),indirect_binary(plus)); I have attached the source file. Your feedback would be greatly appreciated. -- Matthias Kaeppler