text: /**
   * @file
   * @copyright This code is licensed under the 3-clause BSD license.\n
   *            Copyright ETH Zurich, Laboratory of Physical Chemistry, Reiher Group.\n
   *            See LICENSE.txt for details.
   */
  
  #ifndef SPARROW_ORDERTAG_H
  #define SPARROW_ORDERTAG_H
  
  namespace Scine {
  namespace Sparrow {
  /**
   * @brief Tag to define the order in the preconditioner evaluators.
   * This is in a single file to prevent needing to include a huge header for
   * this.
   */
  struct OrderTag {};
  } // namespace Sparrow
  } // namespace Scine
  
  #endif // SPARROW_ORDERTAG_H
  