Method skippedBefore

Telegram/SourceFiles/data/data_sparse_ids.cpp:44–55

}

std::optional<int> SparseIdsMergedSlice::skippedBefore() const {
	return _unsorted
		? _unsorted->skippedBefore()
		: Add(
			isolatedInMigrated() ? 0 : _part.skippedBefore(),
			_migrated
				? (isolatedInPart()
					? _migrated->fullCount()
					: _migrated->skippedBefore())
				: 0
		);
}

std::optional<int> SparseIdsMergedSlice::skippedAfter() const {
	return _unsorted