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