#include <iostream>
#include <set>
 
template <typename ,typename>
struct swap_set_comparator{};
 
template <typename new_comp,typename set_type,typename comp,typename alloc>
struct swap_set_comparator<new_comp,std::set<set_type,comp,alloc> >
{
    using type = std::set<set_type,new_comp,alloc>;
};
 
template <typename container, typename... Args,typename Func>
auto make_set(Args&&... args,Func&& f)
{
   return typename swap_set_comparator<Func,container>::type(std::forward<Args>(args)...,std::forward<Func>(f));
}
 
 
int main() 
{
    auto comparator = [](int *a, int *b){return *a<*b;};
    std::set<int*,decltype(comparator)> S(comparator);
 
    // or 
 
    auto S2 = make_set<std::set<int*>>([](int *a, int *b){return *a<*b;});
    return 0;
}

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