255   std::vector<std::vector<int64_t>> arglists(ranges.size());  in Ranges()  local
257     AddRange(&arglists[i], ranges[i].first, ranges[i].second,  in Ranges()
261   ArgsProduct(arglists);  in Ranges()
267     const std::vector<std::vector<int64_t>>& arglists) {  in ArgsProduct()  argument
268   BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(arglists.size()));  in ArgsProduct()
270   std::vector<std::size_t> indices(arglists.size());  in ArgsProduct()
272       std::begin(arglists), std::end(arglists), std::size_t{1},  in ArgsProduct()
277   args.reserve(arglists.size());  in ArgsProduct()
279     for (std::size_t arg = 0; arg < arglists.size(); arg++) {  in ArgsProduct()
280       args.push_back(arglists[arg][indices[arg]]);  in ArgsProduct()
287       indices[arg] = (indices[arg] + 1) % arglists[arg].size();  in ArgsProduct()
288     } while (indices[arg++] == 0 && arg < arglists.size());  in ArgsProduct()