added accessor for set_{id, name, instance} for all problems

include/ioh/problem/problem.hpp

@@ -226,6 +226,33 @@ namespace ioh
                 constraintset_.remove(c);
                 log_info_.allocate(optimum_, constraintset_);
             }
+
+            //! Call this method after updating any fields on meta_data_
+            void updated_metadata() {
+                if (logger_ != nullptr){
+                    if(state_.evaluations != 0)
+                        IOH_DBG(warning, "Updated meta_data with logger attached and already evaluated problem. State will be reset.")
+                    reset();
+                }
+            }
+
+            //! Accessor for problem id
+            void set_id(const int new_id) {
+                meta_data_.problem_id = new_id;
+                updated_metadata();
+            }
+
+            //! Accessor for problem instance
+            void set_instance(const int new_instance){
+                meta_data_.instance = new_instance;
+                updated_metadata();
+            }
+
+            //! Accessor for problem name
+            void set_name(const std::string& new_name){
+                meta_data_.name = new_name;
+                updated_metadata();
+            }
 
             //! Stream operator
             friend std::ostream &operator<<(std::ostream &os, const Problem &obj)

include/ioh/problem/structures.hpp

@@ -228,8 +228,6 @@ namespace ioh
              */
             State(Solution<T, double> initial) : initial_solution(std::move(initial)) { reset(); }
 
-
-
             //! reset the state
             void reset()
             {

ioh/src/problem.cpp

@@ -433,6 +433,10 @@ void define_base_class(py::module &m, const std::string &name)
                     how: The enforcement strategy, should be one of the 'ioh.ConstraintEnforcement' options
                     exponent: The exponent for scaling the contraint
                 )pbdoc")
+
+        .def("set_id", &ProblemType::set_id, py::arg("new_problem_id"), "update the problem id")
+        .def("set_instance", &ProblemType::set_instance, py::arg("new_instance"), "update the problem instance")
+        .def("set_name", &ProblemType::set_name, py::arg("new_name"),"update the problem name")
         .def("__repr__", [=](const ProblemType &p) {
             using namespace ioh::common;
             const auto meta_data = p.meta_data();