(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

 

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#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();   } }

 

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#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)); }