Remove unused variable warnings and integer conversion warnings

dune/vtk/utility/lagrangepoints.impl.hh

@@ -76,10 +76,10 @@ void LagrangePointSetBuilder<K,1>::operator() (GeometryType gt, int order, Point
   if (order > 1) {
     // Inner nodes
     Vec p{0.0};
-    for (unsigned int i = 0; i < order-1; i++)
+    for (int i = 0; i < order-1; i++)
     {
       p[0] += 1.0 / order;
-      points.push_back(LP{p,Key{0,dim-1,i}});
+      points.push_back(LP{p,Key{0,dim-1,(unsigned int)(i)}});
     }
   }
 }

dune/vtk/vtktimeserieswriter.impl.hh

@@ -26,7 +26,7 @@ template <class W>
 VtkTimeseriesWriter<W>::~VtkTimeseriesWriter ()
 {
   if (initialized_) {
-    int ec = std::remove(filenameMesh_.c_str());
+    [[maybe_unused]] int ec = std::remove(filenameMesh_.c_str());
     assert(ec == 0);
     for (auto const& timestep : timesteps_) {
       ec = std::remove(timestep.second.c_str());

src/lagrangepoints.cc

@@ -39,9 +39,9 @@ void write (std::string prefix, index_constant<dim>)
       using InterpolationF = LagrangeInterpolationFactory<Vtk::LagrangePointSet, dim, double>;
       GenericLocalFiniteElement<BasisF, CoefficientF, InterpolationF> localFE(GeometryTypes::cube(dim), order);
 
-      auto const& localBasis = localFE.localBasis();
-      auto const& localCoefficints = localFE.localCoefficients();
-      auto const& localInterpolation = localFE.localInterpolation();
+      [[maybe_unused]] auto const& localBasis = localFE.localBasis();
+      [[maybe_unused]] auto const& localCoefficints = localFE.localCoefficients();
+      [[maybe_unused]] auto const& localInterpolation = localFE.localInterpolation();
     }
 
     {