- xbt_dict_t children_ = xbt_dict_new_homogeneous(NULL); // sub-ASes
- xbt_dynar_t vertices_ = xbt_dynar_new(sizeof(char*),NULL); // our content, as known to our graph routing algorithm (maps vertexId -> vertex)
+ xbt_dict_t children_ = xbt_dict_new_homogeneous(nullptr); // sub-ASes
+ xbt_dynar_t vertices_ = xbt_dynar_new(sizeof(char*),nullptr); // our content, as known to our graph routing algorithm (maps vertexId -> vertex)