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(C++) std::mem_fun

 

An adapter to be able to use for_each on a member function of T stored in a container as T* (compare std::mem_fun_ref, to use for_each on a member function of T stored in a container as T ).

 

Use a container of boost::shared_ptr<T> instead.

 

 

 

 

 

Replacing a for loop by algorithms using std::mem_fun

 

#include <vector>

struct Widget
{
  void DoIt() const { /* do it */ }
};

void DoIt(const std::vector<Widget*>& v)
{
  const int sz = static_cast<int>(v.size());
  for (int i=0; i!=sz; ++i)
  {
    v[i]->DoIt();
  }
}

 

#include <algorithm>
#include <numeric>
#include <vector>

struct Widget
{
  void DoIt() const { /* do it */ }
};

void DoIt(const std::vector<Widget*>& v)
{
  std::for_each(v.begin(),v.end(),std::mem_fun(&Widget::DoIt));
}

 

 

 

 

 

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