ENH: functionObjects: force writing when used through execFlowFunctionObjects

src/OpenFOAM/db/functionObjects/functionObjectList/functionObjectList.H

@@ -153,8 +153,10 @@ public:
         //- Called at the start of the time-loop
         virtual bool start();
 
-        //- Called at each ++ or += of the time-loop
-        virtual bool execute();
+        //- Called at each ++ or += of the time-loop. forceWrite overrides
+        //  the usual outputControl behaviour and forces writing always
+        //  (used in postprocessing mode)
+        virtual bool execute(const bool forceWrite = false);
 
         //- Called when Time::run() determines that the time-loop exits
         virtual bool end();