virtual void failure(CmdLineInterface& c, ArgException& e)
{
static_cast<void>(c); // Ignore input, don't warn
cerr << "my failure message: " << endl
<< e.what() << endl;
exit(1);
}
virtual void failure(CmdLineInterface& c, ArgException& e)
{
cerr << "my failure message: " << endl
<< e.what() << endl;
}