example.c

typedef simd_t __m256i;

// specialized for every container type
simd_t container_to_chunk(const container_t * array, size_t chunk_position);

// intersecting any 2 types of containers
container_intersection(const container *a, const container *b, bitset *dst) {
  // promote dst to bitset
  
  for (i = 0; i < N_CHUNKS; ++i) {
    simd_t chunk_a = container_to_chunk(a, i);
    simd_t chunk_b = container_to_chunk(b, i);
    simd_t *addr = &((simd_t*) dst->array)[i]
    _mm_save(addr, _mm_intersection(a, b));
    // dst->cardinality += popcount(addr)
  }
  
  // optionnally promote dst to best suited container
  return dst;
}