Question

Is it possible to use std::for_each or anything else like that ?

#include <list>
#include <algorithm>

// Class declaration
//
struct Interface
{
   virtual void run() = 0;
};

struct A : public Interface
{
   void run() { std::cout << "I run class A" << std::endl; }
};

struct B : public Interface
{
   void run() { std::cout << "I run class B" << std::endl; }
};

// Main
//
int main()
{
   // Create A and B
   A a;
   B b;

   // Insert it inside a list
   std::list<Interface *> list;
   list.push_back(&a);
   list.push_back(&b);

   // Then execute a func with for_each without recreate a func which call Interface::run() 
   std::for_each(list.begin(), list.end(), run);

   return 0;
}

Edit :
My question is : How can I call each run() member function inside a loop using algorithm or a more simply a C++ way without using iterators…

Answer 1

You can do this using std::mem_fun:

std::for_each(list.begin(), list.end(), std::mem_fun(&Interface::run));