raw_storage_iterator

template <class OutputIterator, class T>
  class raw_storage_iterator :
    public iterator<output_iterator_tag,void,void,void,void>
{
protected:
  OutputIterator iter;
public:
  explicit raw_storage_iterator (OutputIterator x) : iter(x) {}
  raw_storage_iterator<OutputIterator,T>& operator* ()
    { return *this; }
  raw_storage_iterator<OutputIterator,T>& operator= (const T& element)
    { new (static_cast<void*>(&*iter)) T (element); return *this; }
  raw_storage_iterator<OutputIterator,T>& operator++ ()
    { ++iter; return *this; }
  raw_storage_iterator<OutputIterator,T> operator++ (int)
    { raw_storage_iterator<OutputIterator,T> tmp = *this; ++iter; return tmp; }
};

// raw_storage_iterator example
#include <iostream>
#include <memory>
#include <vector>
#include <string>
using namespace std;
int main () {
  vector<string> myvector;
  myvector.push_back ("first");
  myvector.push_back ("second");
  myvector.push_back ("third");
  pair<string*,ptrdiff_t> result = get_temporary_buffer<string>(3);
  string* pstr=result.first;
  raw_storage_iterator<string*,string> raw_it (pstr);
  copy (myvector.begin(), myvector.end(), raw_it);
  for (int i=0; i<3; i++)
    cout << pstr[i] << " ";
  cout << endl;
  return_temporary_buffer(pstr);
  return 0;
}