Method begin

Bcore/src/main/cpp/base/hash_set.h:276–282

Lower case for c++11 for each.

  // Lower case for c++11 for each.
  iterator begin() {
    iterator ret(this, 0);
    if (num_buckets_ != 0 && IsFreeSlot(ret.index_)) {
      ++ret;  // Skip all the empty slots.
    }
    return ret;
  }

  // Lower case for c++11 for each. const version.
  const_iterator begin() const {