message: Code review: No need to pass an edge to closed_common_neighbours_row_index, can be 2 vertices as it simplifies the code
diff: @@ -118,11 +118,10 @@ class Flag_complex_sparse_matrix {
  const Row_index rw_u = vertex_to_row_.at(u);
  const Row_index rw_v = vertex_to_row_.at(v);
  - auto rw_e = std::make_pair(rw_u, rw_v);
  #ifdef DEBUG_TRACES
  std::cout << "The edge {" << u << ", " << v << "} is going for domination check." << std::endl;
  #endif // DEBUG_TRACES
  - auto common_neighbours = closed_common_neighbours_row_index(rw_e);
  + auto common_neighbours = closed_common_neighbours_row_index(rw_u, rw_v);
  #ifdef DEBUG_TRACES
  std::cout << "And its common neighbours are." << std::endl;
  for (auto neighbour : common_neighbours) {
  @@ -160,9 +159,8 @@ class Flag_complex_sparse_matrix {
  #endif // DEBUG_TRACES
  auto rw_u = vertex_to_row_[u];
  auto rw_v = vertex_to_row_[v];
  - auto rw_critical_edge = std::make_pair(rw_u, rw_v);
  - Row_indices_vector common_neighbours = closed_common_neighbours_row_index(rw_critical_edge);
  + Row_indices_vector common_neighbours = closed_common_neighbours_row_index(rw_u, rw_v);
  if (common_neighbours.size() > 2) {
  for (auto rw_c : common_neighbours) {
  @@ -250,16 +248,11 @@ class Flag_complex_sparse_matrix {
  }
  // Returns the list of closed neighbours of the edge :{u,v}.
  - Row_indices_vector closed_common_neighbours_row_index(const std::pair<Row_index, Row_index>& rw_edge) const
  + Row_indices_vector closed_common_neighbours_row_index(Row_index rw_u, Row_index rw_v) const
  {
  + Row_indices_vector non_zero_indices_u = closed_neighbours_row_index(rw_u);
  + Row_indices_vector non_zero_indices_v = closed_neighbours_row_index(rw_v);
  Row_indices_vector common;
  - Row_indices_vector non_zero_indices_u;
  - Row_indices_vector non_zero_indices_v;
  - Row_index rw_u = std::get<0>(rw_edge);
  - Row_index rw_v = std::get<1>(rw_edge);
  -
  - non_zero_indices_u = closed_neighbours_row_index(rw_u);
  - non_zero_indices_v = closed_neighbours_row_index(rw_v);
  std::set_intersection(non_zero_indices_u.begin(), non_zero_indices_u.end(), non_zero_indices_v.begin(),
  non_zero_indices_v.end(), std::inserter(common, common.begin()));
  