add an interface toward IOHexperimenter

Handle IOH mono-objective function and CSV logger.

problems/eval/eoEvalIOH.h

@@ -0,0 +1,61 @@
+
+#ifndef _eoEvalIOH_h
+#define _eoEvalIOH_h
+
+#include <IOHprofiler_problem.hpp>
+#include <IOHprofiler_csv_logger.h>
+
+/** Wrap an IOHexperimenter's problem class within an eoEvalFunc.
+ *
+ * See https://github.com/IOHprofiler/IOHexperimenter
+ *
+ * Handle only fitnesses that inherits from eoScalarFitness.
+ *
+ * @note: You're responsible of matching the fitness' scalar type (IOH handle double and int, as of 2020-03-09).
+ *
+ * You will need to pass the IOH include directory to your compiler (e.g. IOHexperimenter/build/Cpp/src/).
+ */
+template<class EOT>
+class eoEvalIOH : public eoEvalFunc<EOT>
+{
+    public:
+        using Fitness = typename EOT::Fitness;
+        using ScalarType = typename Fitness::ScalarType;
+
+        eoEvalIOH( IOHprofiler_problem<ScalarType> & pb) :
+                _ioh_pb(pb),
+                _has_log(false)
+        { }
+
+        eoEvalIOH( IOHprofiler_problem<ScalarType> & pb, IOHprofiler_csv_logger & log ) :
+                _ioh_pb(pb),
+                _has_log(true),
+                _ioh_log(log)
+       { }
+
+        virtual void operator()(EOT& sol)
+        {
+            if(not sol.invalid()) {
+                return;
+            }
+
+            sol.fitness( call( sol ) );
+        }
+
+    protected:
+        IOHprofiler_problem<ScalarType> & _ioh_pb;
+        bool _has_log;
+        IOHprofiler_csv_logger & _ioh_log;
+
+        virtual Fitness call(EOT& sol)
+        {
+            Fitness f = _ioh_pb.evaluate(sol);
+            if(_has_log) {
+                _ioh_log.write_line(_ioh_pb.loggerInfo());
+            }
+            return f;
+        }
+
+};
+
+#endif // _eoEvalIOH_h