[#7951] pass unsed variables to Application for optimisation

No test yet, hence ticket added on github #63

include/DoocsUpdater.h

@@ -37,6 +37,8 @@ namespace ChimeraTK {
     void addVariable(
         ChimeraTK::TransferElementAbstractor variable, EqFct* eq_fct, std::function<void()> updaterFunction);
 
+    const std::list<ChimeraTK::TransferElementAbstractor>& getElementsToRead() { return _elementsToRead; }
+
    protected:
     std::list<ChimeraTK::TransferElementAbstractor> _elementsToRead;
     boost::thread _syncThread; // we have to use boost thread to use interruption points

include/VariableMapper.h

@@ -54,6 +54,8 @@ namespace ChimeraTK {
     /// Functiont o convert a string into a DataConsistencyGroup::MatchingMode enum value
     static DataConsistencyGroup::MatchingMode evaluateDataMatching(std::string txt);
 
+    const std::set<std::string>& getUsedVariables() const { return _usedInputVariables; }
+
    protected:
     VariableMapper() = default;
 

src/eq_create.cc

@@ -41,6 +41,15 @@ void eq_init_prolog() {
     ChimeraTK::VariableMapper::getInstance().directImport(pvNames);
   }
 
+  // prepare list of unmapped read variables and pass it to the Application for optimisation
+  for(auto &p : ChimeraTK::VariableMapper::getInstance().getUsedVariables()) {
+    auto it = pvNames.find(p);
+    if(it != pvNames.end()) {
+      pvNames.erase(it);
+    }
+  }
+  ChimeraTK::ApplicationBase::getInstance().optimiseUnmappedVariables(pvNames);
+
   // activate the advanced archiver to have histories
   set_arch_mode(1);
 }