text: // Copyright (c) 2017-2018, Lawrence Livermore National Security, LLC.
  // Produced at the Lawrence Livermore National Laboratory. LLNL-CODE-734707.
  // All Rights reserved. See files LICENSE and NOTICE for details.
  //
  // This file is part of CEED, a collection of benchmarks, miniapps, software
  // libraries and APIs for efficient high-order finite element and spectral
  // element discretizations for exascale applications. For more information and
  // source code availability see http://github.com/ceed.
  //
  // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC,
  // a collaborative effort of two U.S. Department of Energy organizations (Office
  // of Science and the National Nuclear Security Administration) responsible for
  // the planning and preparation of a capable exascale ecosystem, including
  // software, applications, hardware, advanced system engineering and early
  // testbed platforms, in support of the nation's exascale computing imperative.
  
  #include <string.h>
  #include "ceed-backend.h"
  #include "ceed-identity.h"
  
  /**
    @brief Set fields identity QFunction that copies inputs directly into outputs
  **/
  static int CeedQFunctionInit_Identity(Ceed ceed, const char *requested,
                                        CeedQFunction qf) {
    // Check QFunction name
    const char *name = "Identity";
    if (strcmp(name, requested))
      // LCOV_EXCL_START
      return CeedError(ceed, 1, "QFunction '%s' does not match requested name: %s",
                       name, requested);
    // LCOV_EXCL_STOP
  
    // QFunction fields 'input' and 'output' with requested emodes added
    //   by the library rather than being added here
  
    return 0;
  }
  
  /**
    @brief Register identity QFunction that copies inputs directly into outputs
  **/
  __attribute__((constructor))
  static void Register(void) {
    CeedQFunctionRegister("Identity", Identity_loc, 1, Identity,
                          CeedQFunctionInit_Identity);
  }
  