static simgrid::config::Flag<std::string> ns3_seed(
"ns3/seed",
"The random seed provided to ns-3. Either 'time' to seed with time(), blank to not set (default), or a number.", "",
- [](std::string val) {
+ [](const std::string& val) {
if (val.length() == 0)
return;
if (strcasecmp(val.c_str(), "time") == 0) {