Method EndIter

src/data/ellpack_page_source.h:369–378

Need a specialized end iter as we can concatenate pages.

  void Fetch() final;
  // Need a specialized end iter as we can concatenate pages.
  void EndIter() final {
    if (this->cache_info_->written) {
      CHECK_EQ(this->Iter(), this->cache_info_->Size());
    } else {
      CHECK_LE(this->cache_info_->Size(), this->ext_info_.n_batches);
    }
    this->cache_info_->Commit();
    CHECK_GE(this->count_, 1);
    this->count_ = 0;
  }
};

// Cache to host