Method reorder

runtime/common/SampleResult.cpp:488–513

}

void sample_result::reorder(const std::vector<std::size_t> &idx,
                            const std::string_view registerName) {
  // First process the counts
  auto &result = retrieve_result(registerName.data());
  CountsDictionary newCounts;
  for (auto [bits, count] : result.counts) {
    if (idx.size() != bits.size())
      throw std::runtime_error("Calling reorder() with invalid parameter idx");

    std::string newBits(bits);
    int i = 0;
    for (auto oldIdx : idx)
      newBits[i++] = bits[oldIdx];
    newCounts[newBits] = count;
  }
  result.counts = newCounts;

  // Now process the sequential data
  for (auto &s : result.sequentialData) {
    std::string newBits(s);
    int i = 0;
    for (auto oldIdx : idx)
      newBits[i++] = s[oldIdx];
    s = newBits;
  }
}
} // namespace cudaq