some clang tidy fixes

src/hyteg/dgfunctionspace/DGFunction.cpp

@@ -20,6 +20,8 @@
 
 #include "hyteg/dgfunctionspace/DGFunction.hpp"
 
+#include <utility>
+
 #include "core/DataTypes.h"
 #include "core/mpi/MPIWrapper.h"
 #include "core/mpi/Reduce.h"
@@ -47,13 +49,13 @@ DGFunction< ValueType >::DGFunction( const std::string&
 , minLevel_( minLevel )
 , maxLevel_( maxLevel )
 , basis_( basis )
-, boundaryCondition_( boundaryCondition )
+, boundaryCondition_( std::move( boundaryCondition ) )
 {
    uint_t dim;
    if ( storage->hasGlobalCells() )
    {
       dim = 3;
-      for ( auto pid : storage->getCellIDs() )
+      for ( const auto& pid : storage->getCellIDs() )
       {
          polyDegreesPerPrimitive_[pid] = initialPolyDegree;
       }
@@ -61,7 +63,7 @@ DGFunction< ValueType >::DGFunction( const std::string&
    else
    {
       dim = 2;
-      for ( auto pid : storage->getFaceIDs() )
+      for ( const auto& pid : storage->getFaceIDs() )
       {
          polyDegreesPerPrimitive_[pid] = initialPolyDegree;
       }
@@ -189,11 +191,11 @@ void DGFunction< ValueType >::evaluateOnMicroElement( const Point3D&         coo
 {
    // 2D
 
-   WALBERLA_ASSERT( !storage_->hasGlobalCells() );
+   WALBERLA_ASSERT( !storage_->hasGlobalCells() )
 
    Point2D coordinates2D( { coordinates[0], coordinates[1] } );
 
-   WALBERLA_ASSERT( storage_->faceExistsLocally( faceID ) );
+   WALBERLA_ASSERT( storage_->faceExistsLocally( faceID ) )
    const Face& face = *storage_->getFace( faceID );
 
    const auto polyDegree = polyDegreesPerPrimitive_.at( faceID );
@@ -244,9 +246,9 @@ void DGFunction< ValueType >::evaluateOnMicroElement( const Point3D&         coo
 {
    // 2D
 
-   WALBERLA_ASSERT( storage_->hasGlobalCells() );
+   WALBERLA_ASSERT( storage_->hasGlobalCells() )
 
-   WALBERLA_ASSERT( storage_->cellExistsLocally( cellID ) );
+   WALBERLA_ASSERT( storage_->cellExistsLocally( cellID ) )
    const Cell& cell = *storage_->getCell( cellID );
 
    const auto polyDegree = polyDegreesPerPrimitive_.at( cellID );