LocalView.hpp

#pragma once
 
#include <dune/functions/functionspacebases/defaultlocalview.hh>
 
#include <amdis/common/OptionalNoCopy.hpp>
#include <amdis/functions/NodeCache.hpp>
 
// NOTE: This is a variant of dune-functions DefaultLocalView
 
namespace AMDiS
{
  template <class GB>
  class LocalView
      : public Dune::Functions::DefaultLocalView<GB>
  {
    using Super = Dune::Functions::DefaultLocalView<GB>;
 
  public:
    using GlobalBasis = GB;
 
    using Tree = typename Super::Tree;
 
    using TreeCache = NodeCache_t<Tree>;
 
  public:
    LocalView (GlobalBasis const& globalBasis)
      : Super(globalBasis)
    {}
 
    TreeCache const& treeCache () const
    {
      if (!treeCache_)
        treeCache_.emplace(makeNodeCache(Super::tree_));
 
      return *treeCache_;
    }
 
    LocalView const& rootLocalView () const
    {
      return *this;
    }
 
  protected:
    mutable OptionalNoCopy<TreeCache> treeCache_ = std::nullopt;
  };
 
} // end namespace AMDiS