arguments.hh

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#pragma once
 
#include <type_traits>
#include <utility>
 
namespace Dune::Vtk
{
 
  template <class... T, class Arg0, class... Args>
  decltype(auto) getArg(Arg0&& arg0, Args&&... args)
  {
    using A = std::decay_t<Arg0>;
    if constexpr ((std::is_same_v<A,T> ||...))
      return std::forward<Arg0>(arg0);
    else
      return getArg<T...>(std::forward<Args>(args)...);
  }
 
} // end namespace Dune::Vtk