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#ifndef TEMPLAT_LATTICE_ALGEBRA_HELPERS_PREGET_H
#define TEMPLAT_LATTICE_ALGEBRA_HELPERS_PREGET_H

/* This file is part of TempLat, available at https://cosmolattice.github.io/templat .
   Copyright 2021-2026 The TempLat authors, see AUTHORS.md.
   Released under the MIT license, see LICENSE.md. */

// File info: Main contributor(s): Franz R. Sattler, Year: 2025

#include "TempLat/util/rangeiteration/tag.h"

namespace TempLat
{
  class PreGet
  {
  public:
    // Put public methods here. These should change very little over time.
    template <typename U>
      requires requires(std::decay_t<U> obj) { obj.preGet(); }
    static inline void apply(U &&obj)
    {
      obj.preGet();
    }

    template <typename U>
      requires(!requires(std::decay_t<U> obj) { obj.preGet(); })
    static inline void apply(U &&)
    {
      // do nothing
    }

    template <typename U, int N>
      requires requires(std::decay_t<U> obj, Tag<N> t) { obj.preGet(t); }
    static inline void apply(U &&obj, Tag<N> t)
    {
      obj.preGet(t);
    }

    template <typename U, int N>
      requires(!requires(std::decay_t<U> obj, Tag<N> t) { obj.preGet(t); })
    static inline void apply(U &&, Tag<N>)
    {
      // do nothing
    }

    PreGet() = delete;

  private:
    /* Put all member variables and private methods here. These may change arbitrarily. */
  };
} // namespace TempLat

#endif