How to use containsRange in roaring64

[MochiXu]

It seems that roaring64 doesn't have function containsRange.
Could you please give me some suggestions about how to use containsRange in roaring64?

  /**
   * Check if all values from x (included) to y (excluded) are present
   */
  bool containsRange(const uint64_t x, const uint64_t y) const noexcept {
      return api::roaring_bitmap_contains_range(&roaring, x, y);
  }

[SLieve]

Roaring64Map internally uses a std::map of uint32_t for the high 32 bits of values, to a 32-bit Roaring bitmap containing the low 32 bits of values with the associated high 32 bits. This means that using roaring_bitmap_contains_range will only determine whether a specific 32-bit Roaring bitmap contains a given 32-bit range.

To determine whether a 64-bit range is fully present in the Roaring64Map, we would need to loop over all different high 32 bits of the range, and check the corresponding 32-bit Roaring bitmaps for subranges. See a similar implementation here.