24 InfeasibleOrUnboundedProblem> {
26 InfeasibleOrUnboundedProblem() {
28 ~InfeasibleOrUnboundedProblem()
noexcept override {
31 const char* what()
const noexcept override {
32 if (description_.empty())
33 description_ =
"The problem is either infeasible or unbounded.\n";
34 return description_.c_str();
38 mutable std::string description_;