ATL / WTL / STL

LionAM wrote:

However, this should in principle not be necessary (as the only information I have to store is the pointer to the node).

sizeof(list<...>::iterator) == sizeof(void*)

void* data = listBox.GetItemData(index);
iter.Ptr = (list<...>::_NodePtr)data;    //Error: list<...>::_NodePtr is protected

list<...>::iterator temp;
*(void**)&temp._Ptr = listBox.GetItemDataPtr(index);
iter = list<...>::iterator(temp._Ptr, &stl_list);

LionAM wrote:

Everything was working as expected under Visual C++ 6.

int* pointer_in_listbox = &(*it);
listBox.SetItemDataPtr(index, pointer_in_listbox);

struct ptr_cmp
{
  // Pointer we're looking for
  const int* ptr;

  // Constructor
  ptr_cmp(const int* p)
  : ptr(p)
  {}

  // Predicate function
  bool operator()(const int& i)
  {
    return (&i == ptr);
  }
};

// Declare a predicate with the item we're looking for
int* pointer_from_listbox = static_cast<int*>(listBox.GetItemDataPtr(index));
ptr_cmp comparer(pointer_from_listbox);

// Find the corresponding iterator
std::list<int>::iterator it = std::find_if(l.begin(), l.end(), comparer);

Cool Cow Orjan wrote:

It is slower than direct access via the iterator, but should not be noticeable in a GUI context.

SetItedDataPtr(&*iter);

2 bugs found.
> recompile ...
65534 bugs found.