Using std::for_each on polymorphic method in c++

When using the std::for_each,

class A;
vector<A*> VectorOfAPointers;

std::for_each(VectorOfAPointers.begin(), VectorOfAPointers.end(), std::mem_fun(&A::foo));

If we have classes inheriting from A and implementing foo(), and we hold a vector of pointers to A, is there any way to call a polymorphic call on foo(), rather then explicitly calling A::foo()? Note: I can't use boost, only standard STL.

Thanks, Gal

From stackoverflow

• It actually works this way.

  #include <algorithm>
  #include <iostream>
  #include <functional>
  #include <vector>
  
  struct A {
      virtual void foo() {
       std::cout << "A::foo()" << std::endl;
      }
  };
  struct B: public A {
      virtual void foo() {
       std::cout << "B::foo()" << std::endl;
      }
  };
  
  int main()
  {
      std::vector<A*> VectorOfAPointers;
      VectorOfAPointers.push_back(new B());
      std::for_each(VectorOfAPointers.begin(), VectorOfAPointers.end(), std::mem_fun(&A::foo));
      return 0;
  }
  

  prints

  B::foo()
  

  So it does exactly what you want. Check that virtual keywords are present though, it's easy to forget them.