Method values_read

cpp/src/arrow/util/rle_encoding_internal.h:835–835

  constexpr size_type values_count() const noexcept { return values_count_; }

  constexpr size_type values_read() const noexcept { return values_read_; }

  constexpr size_type values_remaining() const noexcept {
    ARROW_DCHECK_LE(values_read_, values_count_);