void List<T>::CheckLinks(std::ostream& os) const { typename List<T>::ConstIterator i,j,k; // bool ok = 1; size_t n = 0; for (i = this->Begin(), n = 0; i != this->End(); ++i, ++n) { j = i; --j; ++j; k = i; ++k; --k; if (!i.Valid() || !j.Valid() || !k.Valid() || i != j || i != k) { os << " ** forward reciprocity failure at position " << n << '\n'; // ok = 0; break; } } // if (ok) os << " ** passed forward reciprocity check\n"; for (i = this->rBegin(), n = Size(); i != this->rEnd(); --i, --n) { j = i; --j; ++j; k = i; ++k; --k; if (!i.Valid() || !j.Valid() || !k.Valid() || i != j || i != k) { os << " ** reverse reciprocity failure at position " << n << '\n'; // ok = 0; break; } } // if (ok) os << " ** passed reverse reciprocity check\n"; } // CheckLinks()