Line data    Source code

       1            0 : // Distributed under the MIT License.
       2              : // See LICENSE.txt for details.
       3              : 
       4              : #pragma once
       5              : 
       6              : #include "DataStructures/DataBox/Prefixes.hpp"
       7              : #include "DataStructures/Tensor/TypeAliases.hpp"
       8              : #include "Evolution/DiscontinuousGalerkin/TimeDerivativeDecisions.hpp"
       9              : #include "Utilities/TMPL.hpp"
      10              : 
      11              : /// \cond
      12              : class DataVector;
      13              : 
      14              : namespace Burgers {
      15              : namespace Tags {
      16              : struct U;
      17              : }  // namespace Tags
      18              : }  // namespace Burgers
      19              : namespace gsl {
      20              : template <typename T>
      21              : class not_null;
      22              : }  // namespace gsl
      23              : 
      24              : class DataVector;
      25              : /// \endcond
      26              : 
      27              : namespace Burgers {
      28              : /// Computes the time derivative terms needed for the Burgers system, which are
      29              : /// just the fluxes.
      30            1 : struct TimeDerivativeTerms {
      31            0 :   using temporary_tags = tmpl::list<>;
      32            0 :   using argument_tags = tmpl::list<Tags::U>;
      33              : 
      34            0 :   static evolution::dg::TimeDerivativeDecisions<1> apply(
      35              :       // Time derivatives returned by reference. No source terms or
      36              :       // nonconservative products, so not used. All the tags in the
      37              :       // variables_tag in the system struct.
      38              :       gsl::not_null<Scalar<DataVector>*> /*non_flux_terms_dt_vars*/,
      39              : 
      40              :       // Fluxes returned by reference. Listed in the system struct as
      41              :       // flux_variables.
      42              :       gsl::not_null<tnsr::I<DataVector, 1, Frame::Inertial>*> flux_u,
      43              : 
      44              :       // Arguments listed in argument_tags above
      45              :       const Scalar<DataVector>& u);
      46              : };
      47              : }  // namespace Burgers