On the other hand, this:

  // Step d:
  IntList::iterator back_pred_iter = back_preds[w].begin();
  IntList::iterator back_pred_end = back_preds[w].end();
  for (; back_pred_iter != back_pred_end; back_pred_iter++) {
    int v = *back_pred_iter;
    …

can now be written

  for (auto v : back_preds[w]) {
    …                                ,

hence you could argue that while C++ is certainly “mature” in a sense, it is far from converged.