mapping_collection.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2005 - 2022 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------
 
#ifndef dealii_mapping_collection_h
#define dealii_mapping_collection_h
 
#include <deal.II/base/config.h>
 
#include <deal.II/base/subscriptor.h>
 
#include <deal.II/fe/fe.h>
#include <deal.II/fe/mapping_q1.h>
 
#include <deal.II/hp/collection.h>
 
#include <memory>
#include <vector>
 
DEAL_II_NAMESPACE_OPEN
 
namespace hp
{
  template <int dim, int spacedim = dim>
  class MappingCollection : public Collection<Mapping<dim, spacedim>>
  {
  public:
    MappingCollection() = default;
 
    explicit MappingCollection(const Mapping<dim, spacedim> &mapping);
 
    template <class... MappingTypes>
    explicit MappingCollection(const MappingTypes &...mappings);
 
    MappingCollection(
      const MappingCollection<dim, spacedim> &mapping_collection);
 
    MappingCollection(MappingCollection<dim, spacedim> &&) noexcept(
      std::is_nothrow_move_constructible<
        std::vector<std::shared_ptr<const Mapping<dim, spacedim>>>>::value
        &&std::is_nothrow_move_constructible<std::function<
          unsigned int(const typename hp::MappingCollection<dim, spacedim> &,
                       const unsigned int)>>::value) = default;
 
    MappingCollection<dim, spacedim> &
    operator=(MappingCollection<dim, spacedim> &&) = default; // NOLINT
 
    void
    push_back(const Mapping<dim, spacedim> &new_mapping);
  };
 
 
  template <int dim, int spacedim = dim>
  struct StaticMappingQ1
  {
  public:
    static MappingCollection<dim, spacedim> mapping_collection;
  };
 
 
  /* --------------- inline functions ------------------- */
 
  template <int dim, int spacedim>
  template <class... MappingTypes>
  MappingCollection<dim, spacedim>::MappingCollection(
    const MappingTypes &...mappings)
  {
    static_assert(
      is_base_of_all<Mapping<dim, spacedim>, MappingTypes...>::value,
      "Not all of the input arguments of this function "
      "are derived from FiniteElement<dim,spacedim>!");
 
    // loop over all of the given arguments and add the mappings to
    // this collection. Inlining the definition of mapping_pointers causes
    // internal compiler errors on GCC 7.1.1 so we define it separately:
    const auto mapping_pointers = {
      (static_cast<const Mapping<dim, spacedim> *>(&mappings))...};
    for (const auto p : mapping_pointers)
      push_back(*p);
  }
 
} // namespace hp
 
 
DEAL_II_NAMESPACE_CLOSE
 
#endif