Method idx

include/boost/histogram/iterator.hpp:36–40

  std::size_t dim() const noexcept { return histogram_.dim(); }

  int idx(std::size_t dim = 0) const noexcept {
    if (!cache_) { cache_.set(histogram_); }
    cache_.set_idx(idx_);
    return cache_.get(dim);
  }

  auto bin() const -> decltype(std::declval<Histogram&>().axis()[0]) {
    return histogram_.axis()[idx()];