fixes

src/iks005_newtonRaphson.cpp

@@ -5,10 +5,10 @@
 
 #include <ikarus/assembler/simpleassemblers.hh>
 #include <ikarus/solver/nonlinearsolver/newtonraphson.hh>
-#include <ikarus/solver/nonlinearsolver/solverstate.hh>
 #include <ikarus/utils/init.hh>
 #include <ikarus/utils/nonlinearoperator.hh>
 #include <ikarus/utils/observer/nonlinearsolverlogger.hh>
+#include <ikarus/utils/observer/observable.hh>
 
 auto f(double& x) { return 0.5 * x * x + x - 2; }
 auto df(double& x) { return x + 1; }
@@ -46,11 +46,10 @@ void newtonRaphsonVeryBasicExample() {
   std::cout << "expected solution: " << xExpected << "\n";
 }
 
-class OurFirstObserver
-    : public Ikarus::IObserver<Ikarus::IObservable<Ikarus::NonLinearSolverMessages, Ikarus::NonLinearSolverState>>
+class OurFirstObserver : public Ikarus::IObserver<Ikarus::NonLinearSolverObservable>
 {
 public:
-  void updateImpl(Ikarus::NonLinearSolverMessages message, const Ikarus::NonLinearSolverState&) override {
+  void updateImpl(MessageType message, const StateType&) override {
     if (message == Ikarus::NonLinearSolverMessages::ITERATION_STARTED)
       std::cout << "Iteration started.\n";
   }

src/iks006_nonlinear2DSolid.cpp

@@ -233,7 +233,7 @@ int main(int argc, char** argv) {
 
   lc.subscribeAll(vtkWriter);
   std::cout << "Energy before: " << nonLinOp.value() << std::endl;
-  lc.run();
+  const auto controlState = lc.run();
   nonLinOp.update<0>();
   std::cout << "Energy after: " << nonLinOp.value() << std::endl;
 
@@ -250,4 +250,5 @@ int main(int argc, char** argv) {
   resultWriter.addVertexData(vonMisesFunction);
 
   resultWriter.write("iks006_nonlinear2DSolid_Result");
+  return controlState.success;
 }

src/iks007_vonMisesTruss.cpp

@@ -35,6 +35,7 @@
 #include <ikarus/utils/observer/controlvtkwriter.hh>
 #include <ikarus/utils/observer/genericobserver.hh>
 #include <ikarus/utils/observer/nonlinearsolverlogger.hh>
+#include <ikarus/utils/observer/observable.hh>
 #include <ikarus/utils/pythonautodiffdefinitions.hh>
 
 using namespace Ikarus;
@@ -193,7 +194,7 @@ int main(int argc, char** argv) {
   lambdaAndDisp.setZero(Eigen::NoChange, loadSteps + 1);
   /// Create Observer which executes when control routines messages
   /// SOLUTION_CHANGED
-  auto lvkObserver = std::make_shared<Ikarus::GenericObserver<Ikarus::ControlMessages, Ikarus::ControlState>>(
+  auto lvkObserver = std::make_shared<Ikarus::GenericObserver<Ikarus::ControlObservable>>(
       Ikarus::ControlMessages::SOLUTION_CHANGED, [&](int step) {
         lambdaAndDisp(0, step) = lambda;
         lambdaAndDisp(1, step) = d[2];
@@ -213,7 +214,7 @@ int main(int argc, char** argv) {
   lc.subscribeAll({vtkWriter, lvkObserver});
 
   /// Execute!
-  lc.run();
+  const auto controlState = lc.run();
 
   /// Postprocess
   using namespace matplot;
@@ -241,4 +242,5 @@ int main(int argc, char** argv) {
   // f->draw();
   // using namespace std::chrono_literals;
   // std::this_thread::sleep_for(5s);
+  return controlState.success;
 }