differentiate_wrt.hpp

// Copyright (c) 2019-2024, Lawrence Livermore National Security, LLC and
// other Serac Project Developers. See the top-level LICENSE file for
// details.
//
// SPDX-License-Identifier: (BSD-3-Clause)
#pragma once
 
#include "mfem.hpp"
 
namespace serac {
 
static constexpr uint32_t NO_DIFFERENTIATION = uint32_t(1) << 31;
 
template <uint32_t i>
struct DifferentiateWRT {
};
 
struct differentiate_wrt_this {
  const mfem::Vector& ref;  
 
  operator const mfem::Vector&() const { return ref; }
};
 
inline auto differentiate_wrt(const mfem::Vector& v) { return differentiate_wrt_this{v}; }
 
}  // namespace serac