SpECTRE Documentation Coverage Report
Current view: top level - Evolution/Executables/ScalarAdvection - EvolveScalarAdvection.hpp Hit Total Coverage
Commit: c428a3e2e0ca78fe0364ec1b0e0493c627d428d4 Lines: 0 26 0.0 %
Date: 2026-04-26 20:20:36
Legend: Lines: hit not hit

          Line data    Source code
       1           0 : // Distributed under the MIT License.
       2             : // See LICENSE.txt for details.
       3             : 
       4             : #pragma once
       5             : 
       6             : #include <cstddef>
       7             : #include <cstdint>
       8             : #include <vector>
       9             : 
      10             : #include "Domain/Creators/Factory1D.hpp"
      11             : #include "Domain/Creators/Factory2D.hpp"
      12             : #include "Domain/Tags.hpp"
      13             : #include "Evolution/Actions/RunEventsAndDenseTriggers.hpp"
      14             : #include "Evolution/Actions/RunEventsAndTriggers.hpp"
      15             : #include "Evolution/BoundaryCorrection.hpp"
      16             : #include "Evolution/ComputeTags.hpp"
      17             : #include "Evolution/DgSubcell/Actions/Initialize.hpp"
      18             : #include "Evolution/DgSubcell/Actions/Labels.hpp"
      19             : #include "Evolution/DgSubcell/Actions/ReconstructionCommunication.hpp"
      20             : #include "Evolution/DgSubcell/Actions/SelectNumericalMethod.hpp"
      21             : #include "Evolution/DgSubcell/Actions/TakeTimeStep.hpp"
      22             : #include "Evolution/DgSubcell/Actions/TciAndRollback.hpp"
      23             : #include "Evolution/DgSubcell/Actions/TciAndSwitchToDg.hpp"
      24             : #include "Evolution/DgSubcell/DisableLts.hpp"
      25             : #include "Evolution/DgSubcell/GetTciDecision.hpp"
      26             : #include "Evolution/DgSubcell/NeighborReconstructedFaceSolution.hpp"
      27             : #include "Evolution/DgSubcell/NeighborTciDecision.hpp"
      28             : #include "Evolution/DgSubcell/PrepareNeighborData.hpp"
      29             : #include "Evolution/DgSubcell/Tags/ObserverCoordinates.hpp"
      30             : #include "Evolution/DgSubcell/Tags/ObserverMesh.hpp"
      31             : #include "Evolution/DgSubcell/Tags/TciStatus.hpp"
      32             : #include "Evolution/DiscontinuousGalerkin/Actions/ApplyBoundaryCorrections.hpp"
      33             : #include "Evolution/DiscontinuousGalerkin/Actions/ComputeTimeDerivative.hpp"
      34             : #include "Evolution/DiscontinuousGalerkin/CleanMortarHistory.hpp"
      35             : #include "Evolution/DiscontinuousGalerkin/DgElementArray.hpp"
      36             : #include "Evolution/DiscontinuousGalerkin/Initialization/Mortars.hpp"
      37             : #include "Evolution/DiscontinuousGalerkin/Initialization/QuadratureTag.hpp"
      38             : #include "Evolution/Initialization/ConservativeSystem.hpp"
      39             : #include "Evolution/Initialization/DgDomain.hpp"
      40             : #include "Evolution/Initialization/Evolution.hpp"
      41             : #include "Evolution/Initialization/SetVariables.hpp"
      42             : #include "Evolution/Systems/ScalarAdvection/BoundaryConditions/Factory.hpp"
      43             : #include "Evolution/Systems/ScalarAdvection/BoundaryCorrections/Factory.hpp"
      44             : #include "Evolution/Systems/ScalarAdvection/FiniteDifference/Factory.hpp"
      45             : #include "Evolution/Systems/ScalarAdvection/FiniteDifference/Tags.hpp"
      46             : #include "Evolution/Systems/ScalarAdvection/Subcell/GhostData.hpp"
      47             : #include "Evolution/Systems/ScalarAdvection/Subcell/NeighborPackagedData.hpp"
      48             : #include "Evolution/Systems/ScalarAdvection/Subcell/SetInitialRdmpData.hpp"
      49             : #include "Evolution/Systems/ScalarAdvection/Subcell/TciOnDgGrid.hpp"
      50             : #include "Evolution/Systems/ScalarAdvection/Subcell/TciOnFdGrid.hpp"
      51             : #include "Evolution/Systems/ScalarAdvection/Subcell/TciOptions.hpp"
      52             : #include "Evolution/Systems/ScalarAdvection/Subcell/TimeDerivative.hpp"
      53             : #include "Evolution/Systems/ScalarAdvection/Subcell/VelocityAtFace.hpp"
      54             : #include "Evolution/Systems/ScalarAdvection/System.hpp"
      55             : #include "Evolution/Systems/ScalarAdvection/VelocityField.hpp"
      56             : #include "IO/Observer/Actions/RegisterEvents.hpp"
      57             : #include "IO/Observer/Helpers.hpp"
      58             : #include "IO/Observer/ObserverComponent.hpp"
      59             : #include "NumericalAlgorithms/DiscontinuousGalerkin/Formulation.hpp"
      60             : #include "NumericalAlgorithms/DiscontinuousGalerkin/Tags.hpp"
      61             : #include "Options/Protocols/FactoryCreation.hpp"
      62             : #include "Options/String.hpp"
      63             : #include "Parallel/Local.hpp"
      64             : #include "Parallel/Phase.hpp"
      65             : #include "Parallel/PhaseControl/ExecutePhaseChange.hpp"
      66             : #include "Parallel/PhaseControl/Factory.hpp"
      67             : #include "Parallel/PhaseControl/VisitAndReturn.hpp"
      68             : #include "Parallel/PhaseDependentActionList.hpp"
      69             : #include "Parallel/Protocols/RegistrationMetavariables.hpp"
      70             : #include "ParallelAlgorithms/Actions/AddComputeTags.hpp"
      71             : #include "ParallelAlgorithms/Actions/AddSimpleTags.hpp"
      72             : #include "ParallelAlgorithms/Actions/InitializeItems.hpp"
      73             : #include "ParallelAlgorithms/Actions/MutateApply.hpp"
      74             : #include "ParallelAlgorithms/Actions/TerminatePhase.hpp"
      75             : #include "ParallelAlgorithms/Events/Completion.hpp"
      76             : #include "ParallelAlgorithms/Events/Factory.hpp"
      77             : #include "ParallelAlgorithms/Events/Tags.hpp"
      78             : #include "ParallelAlgorithms/EventsAndDenseTriggers/DenseTrigger.hpp"
      79             : #include "ParallelAlgorithms/EventsAndDenseTriggers/DenseTriggers/Factory.hpp"
      80             : #include "ParallelAlgorithms/EventsAndTriggers/Event.hpp"
      81             : #include "ParallelAlgorithms/EventsAndTriggers/EventsAndTriggers.hpp"
      82             : #include "ParallelAlgorithms/EventsAndTriggers/LogicalTriggers.hpp"
      83             : #include "ParallelAlgorithms/EventsAndTriggers/Trigger.hpp"
      84             : #include "PointwiseFunctions/AnalyticData/AnalyticData.hpp"
      85             : #include "PointwiseFunctions/AnalyticSolutions/AnalyticSolution.hpp"
      86             : #include "PointwiseFunctions/AnalyticSolutions/ScalarAdvection/Krivodonova.hpp"
      87             : #include "PointwiseFunctions/AnalyticSolutions/ScalarAdvection/Kuzmin.hpp"
      88             : #include "PointwiseFunctions/AnalyticSolutions/ScalarAdvection/Sinusoid.hpp"
      89             : #include "PointwiseFunctions/AnalyticSolutions/Tags.hpp"
      90             : #include "Time/Actions/SelfStartActions.hpp"
      91             : #include "Time/AdvanceTime.hpp"
      92             : #include "Time/ChangeSlabSize/Action.hpp"
      93             : #include "Time/ChangeStepSize.hpp"
      94             : #include "Time/ChangeTimeStepperOrder.hpp"
      95             : #include "Time/CleanHistory.hpp"
      96             : #include "Time/RecordTimeStepperData.hpp"
      97             : #include "Time/StepChoosers/Factory.hpp"
      98             : #include "Time/StepChoosers/FixedLtsRatio.hpp"
      99             : #include "Time/StepChoosers/StepChooser.hpp"
     100             : #include "Time/Tags/Time.hpp"
     101             : #include "Time/Tags/TimeStepId.hpp"
     102             : #include "Time/TimeSequence.hpp"
     103             : #include "Time/TimeSteppers/Factory.hpp"
     104             : #include "Time/TimeSteppers/LtsTimeStepper.hpp"
     105             : #include "Time/TimeSteppers/TimeStepper.hpp"
     106             : #include "Time/Triggers/TimeTriggers.hpp"
     107             : #include "Time/UpdateU.hpp"
     108             : #include "Utilities/ProtocolHelpers.hpp"
     109             : #include "Utilities/TMPL.hpp"
     110             : 
     111             : /// \cond
     112             : namespace PUP {
     113             : class er;
     114             : }  // namespace PUP
     115             : namespace Parallel {
     116             : template <typename Metavariables>
     117             : class CProxy_GlobalCache;
     118             : }  // namespace Parallel
     119             : /// \endcond
     120             : 
     121             : template <size_t Dim>
     122             : struct EvolutionMetavars {
     123             :   static constexpr size_t volume_dim = Dim;
     124           0 :   using system = ScalarAdvection::System<Dim>;
     125           0 :   using temporal_id = Tags::TimeStepId;
     126           0 :   using TimeStepperBase = TimeStepper;
     127             : 
     128             :   static constexpr bool local_time_stepping =
     129             :       TimeStepperBase::local_time_stepping;
     130             :   static constexpr bool use_dg_element_collection = false;
     131             : 
     132             :   // The use_dg_subcell flag controls whether to use unlimited DG (false)
     133             :   // or a DG-FD hybrid scheme (true).
     134             :   static constexpr bool use_dg_subcell = true;
     135             : 
     136           0 :   using initial_data_list =
     137             :       tmpl::conditional_t<Dim == 1,
     138             :                           tmpl::list<ScalarAdvection::Solutions::Krivodonova,
     139             :                                      ScalarAdvection::Solutions::Sinusoid>,
     140             :                           tmpl::list<ScalarAdvection::Solutions::Kuzmin>>;
     141             : 
     142           0 :   using analytic_variables_tags = typename system::variables_tag::tags_list;
     143           0 :   using analytic_compute = evolution::Tags::AnalyticSolutionsCompute<
     144             :       volume_dim, analytic_variables_tags, use_dg_subcell, initial_data_list>;
     145           0 :   using error_compute = Tags::ErrorsCompute<analytic_variables_tags>;
     146           0 :   using error_tags = db::wrap_tags_in<Tags::Error, analytic_variables_tags>;
     147           0 :   using observe_fields = tmpl::push_back<
     148             :       tmpl::append<
     149             :           typename system::variables_tag::tags_list, error_tags,
     150             :           tmpl::conditional_t<use_dg_subcell,
     151             :                               tmpl::list<evolution::dg::subcell::Tags::
     152             :                                              TciStatusCompute<volume_dim>>,
     153             :                               tmpl::list<>>>,
     154             :       tmpl::conditional_t<
     155             :           use_dg_subcell,
     156             :           evolution::dg::subcell::Tags::ObserverCoordinatesCompute<
     157             :               volume_dim, Frame::ElementLogical>,
     158             :           ::Events::Tags::ObserverCoordinatesCompute<volume_dim,
     159             :                                                      Frame::ElementLogical>>,
     160             :       tmpl::conditional_t<
     161             :           use_dg_subcell,
     162             :           evolution::dg::subcell::Tags::ObserverCoordinatesCompute<volume_dim,
     163             :                                                                    Frame::Grid>,
     164             :           domain::Tags::Coordinates<volume_dim, Frame::Grid>>,
     165             :       tmpl::conditional_t<
     166             :           use_dg_subcell,
     167             :           evolution::dg::subcell::Tags::ObserverCoordinatesCompute<
     168             :               volume_dim, Frame::Inertial>,
     169             :           domain::Tags::Coordinates<volume_dim, Frame::Inertial>>>;
     170           0 :   using non_tensor_compute_tags = tmpl::list<
     171             :       tmpl::conditional_t<
     172             :           use_dg_subcell,
     173             :           tmpl::list<
     174             :               evolution::dg::subcell::Tags::ObserverMeshCompute<volume_dim>,
     175             :               evolution::dg::subcell::Tags::ObserverInverseJacobianCompute<
     176             :                   volume_dim, Frame::ElementLogical, Frame::Inertial>,
     177             :               evolution::dg::subcell::Tags::
     178             :                   ObserverJacobianAndDetInvJacobianCompute<
     179             :                       volume_dim, Frame::ElementLogical, Frame::Inertial>>,
     180             :           tmpl::list<::Events::Tags::ObserverMeshCompute<volume_dim>,
     181             :                      ::Events::Tags::ObserverInverseJacobianCompute<
     182             :                          volume_dim, Frame::ElementLogical, Frame::Inertial>,
     183             :                      ::Events::Tags::ObserverJacobianCompute<
     184             :                          volume_dim, Frame::ElementLogical, Frame::Inertial>,
     185             :                      ::Events::Tags::ObserverDetInvJacobianCompute<
     186             :                          Frame::ElementLogical, Frame::Inertial>>>,
     187             :       tmpl::list<analytic_compute, error_compute>>;
     188             : 
     189             :   struct factory_creation
     190             :       : tt::ConformsTo<Options::protocols::FactoryCreation> {
     191           0 :     using factory_classes = tmpl::map<
     192             :         tmpl::pair<DenseTrigger, DenseTriggers::standard_dense_triggers>,
     193             :         tmpl::pair<DomainCreator<volume_dim>, domain_creators<volume_dim>>,
     194             :         tmpl::pair<Event,
     195             :                    tmpl::flatten<tmpl::list<
     196             :                        Events::Completion,
     197             :                        dg::Events::field_observations<
     198             :                            volume_dim, observe_fields, non_tensor_compute_tags>,
     199             :                        Events::time_events<system>>>>,
     200             :         tmpl::pair<evolution::BoundaryCorrection,
     201             :                    ScalarAdvection::BoundaryCorrections::
     202             :                        standard_boundary_corrections<Dim>>,
     203             :         tmpl::pair<evolution::initial_data::InitialData, initial_data_list>,
     204             :         tmpl::pair<LtsTimeStepper, TimeSteppers::lts_time_steppers>,
     205             :         tmpl::pair<PhaseChange, PhaseControl::factory_creatable_classes>,
     206             :         tmpl::pair<ScalarAdvection::BoundaryConditions::BoundaryCondition<Dim>,
     207             :                    ScalarAdvection::BoundaryConditions::
     208             :                        standard_boundary_conditions<Dim>>,
     209             :         tmpl::pair<StepChooser<StepChooserUse::LtsStep>,
     210             :                    StepChoosers::standard_step_choosers<system>>,
     211             :         tmpl::pair<StepChooser<StepChooserUse::Slab>,
     212             :                    tmpl::append<StepChoosers::standard_slab_choosers<
     213             :                                     system, local_time_stepping>,
     214             :                                 tmpl::conditional_t<
     215             :                                     use_dg_subcell and local_time_stepping,
     216             :                                     tmpl::list<StepChoosers::FixedLtsRatio>,
     217             :                                     tmpl::list<>>>>,
     218             :         tmpl::pair<TimeSequence<double>,
     219             :                    TimeSequences::all_time_sequences<double>>,
     220             :         tmpl::pair<TimeSequence<std::uint64_t>,
     221             :                    TimeSequences::all_time_sequences<std::uint64_t>>,
     222             :         tmpl::pair<TimeStepper, TimeSteppers::time_steppers>,
     223             :         tmpl::pair<Trigger, tmpl::append<Triggers::logical_triggers,
     224             :                                          Triggers::time_triggers>>>;
     225             :   };
     226             : 
     227             :   struct SubcellOptions {
     228             :     static constexpr bool subcell_enabled = use_dg_subcell;
     229             :     static constexpr bool subcell_enabled_at_external_boundary = false;
     230             : 
     231             :     // We send `ghost_zone_size` cell-centered grid points for variable
     232             :     // reconstruction, of which we need `ghost_zone_size-1` for reconstruction
     233             :     // to the internal side of the element face, and `ghost_zone_size` for
     234             :     // reconstruction to the external side of the element face.
     235             :     template <typename DbTagsList>
     236           0 :     static constexpr size_t ghost_zone_size(
     237             :         const db::DataBox<DbTagsList>& box) {
     238             :       return db::get<ScalarAdvection::fd::Tags::Reconstructor<volume_dim>>(box)
     239             :           .ghost_zone_size();
     240             :     }
     241             : 
     242           0 :     using DgComputeSubcellNeighborPackagedData =
     243             :         ScalarAdvection::subcell::NeighborPackagedData;
     244             : 
     245           0 :     using GhostVariables = ScalarAdvection::subcell::GhostVariables;
     246             :   };
     247             : 
     248           0 :   using observed_reduction_data_tags =
     249             :       observers::collect_reduction_data_tags<tmpl::flatten<tmpl::list<
     250             :           tmpl::at<typename factory_creation::factory_classes, Event>>>>;
     251             : 
     252           0 :   using dg_step_actions = tmpl::flatten<tmpl::list<
     253             :       evolution::dg::Actions::ComputeTimeDerivative<
     254             :           volume_dim, system, AllStepChoosers, local_time_stepping,
     255             :           use_dg_element_collection>,
     256             :       evolution::dg::Actions::ApplyBoundaryCorrectionsToTimeDerivative<
     257             :           volume_dim, use_dg_element_collection>,
     258             :       Actions::MutateApply<RecordTimeStepperData<system>>,
     259             :       tmpl::conditional_t<
     260             :           local_time_stepping,
     261             :           tmpl::list<evolution::Actions::RunEventsAndDenseTriggers<tmpl::list<
     262             :                          evolution::dg::ApplyLtsDenseBoundaryCorrections<
     263             :                              EvolutionMetavars>>>,
     264             :                      Actions::MutateApply<UpdateU<system, local_time_stepping>>,
     265             :                      evolution::dg::Actions::ApplyLtsBoundaryCorrections<
     266             :                          volume_dim, use_dg_element_collection>,
     267             :                      Actions::MutateApply<ChangeTimeStepperOrder<system>>>,
     268             :           tmpl::list<
     269             :               evolution::Actions::RunEventsAndDenseTriggers<tmpl::list<>>,
     270             :               Actions::MutateApply<UpdateU<system, local_time_stepping>>>>,
     271             :       tmpl::conditional_t<use_dg_subcell,
     272             :                           evolution::dg::subcell::Actions::TciAndRollback<
     273             :                               ScalarAdvection::subcell::TciOnDgGrid<Dim>>,
     274             :                           tmpl::list<>>,
     275             :       Actions::MutateApply<CleanHistory<system>>,
     276             :       tmpl::conditional_t<
     277             :           local_time_stepping,
     278             :           Actions::MutateApply<evolution::dg::CleanMortarHistory<volume_dim>>,
     279             :           tmpl::list<>>>>;
     280             : 
     281           0 :   using dg_subcell_step_actions = tmpl::flatten<tmpl::list<
     282             :       evolution::dg::subcell::Actions::SelectNumericalMethod,
     283             :       Actions::Label<evolution::dg::subcell::Actions::Labels::BeginDg>,
     284             :       dg_step_actions,
     285             :       Actions::Goto<evolution::dg::subcell::Actions::Labels::EndOfSolvers>,
     286             :       Actions::Label<evolution::dg::subcell::Actions::Labels::BeginSubcell>,
     287             :       tmpl::conditional_t<local_time_stepping,
     288             :                           // This is just to adjust for FixedLtsRatio, so we
     289             :                           // can pass an empty list of StepChoosers.
     290             :                           Actions::MutateApply<ChangeStepSize<tmpl::list<>>>,
     291             :                           tmpl::list<>>,
     292             :       evolution::dg::subcell::Actions::SendDataForReconstruction<
     293             :           volume_dim, ScalarAdvection::subcell::GhostVariables,
     294             :           use_dg_element_collection>,
     295             :       evolution::dg::subcell::Actions::ReceiveDataForReconstruction<volume_dim>,
     296             :       Actions::Label<
     297             :           evolution::dg::subcell::Actions::Labels::BeginSubcellAfterDgRollback>,
     298             :       evolution::dg::subcell::fd::Actions::TakeTimeStep<
     299             :           ScalarAdvection::subcell::TimeDerivative<volume_dim>>,
     300             :       Actions::MutateApply<RecordTimeStepperData<system>>,
     301             :       Actions::MutateApply<UpdateU<system, local_time_stepping>>,
     302             :       Actions::MutateApply<CleanHistory<system>>,
     303             :       tmpl::conditional_t<
     304             :           local_time_stepping,
     305             :           Actions::MutateApply<evolution::dg::CleanMortarHistory<volume_dim>>,
     306             :           tmpl::list<>>,
     307             :       evolution::dg::subcell::Actions::TciAndSwitchToDg<
     308             :           ScalarAdvection::subcell::TciOnFdGrid<volume_dim>>,
     309             :       Actions::Label<evolution::dg::subcell::Actions::Labels::EndOfSolvers>>>;
     310             : 
     311           0 :   using step_actions =
     312             :       tmpl::conditional_t<use_dg_subcell, dg_subcell_step_actions,
     313             :                           dg_step_actions>;
     314             : 
     315           0 :   using const_global_cache_tags =
     316             :       tmpl::list<evolution::initial_data::Tags::InitialData,
     317             :                  tmpl::conditional_t<
     318             :                      use_dg_subcell,
     319             :                      tmpl::list<ScalarAdvection::fd::Tags::Reconstructor<Dim>,
     320             :                                 ScalarAdvection::subcell::Tags::TciOptions>,
     321             :                      tmpl::list<>>>;
     322             : 
     323           0 :   using dg_registration_list =
     324             :       tmpl::list<observers::Actions::RegisterEventsWithObservers>;
     325             : 
     326           0 :   using initialization_actions = tmpl::list<
     327             :       Initialization::Actions::InitializeItems<
     328             :           Initialization::TimeStepping<EvolutionMetavars, TimeStepperBase>,
     329             :           evolution::dg::Initialization::Domain<EvolutionMetavars>,
     330             :           Initialization::TimeStepperHistory<EvolutionMetavars>>,
     331             :       Initialization::Actions::ConservativeSystem<system>,
     332             : 
     333             :       tmpl::conditional_t<
     334             :           use_dg_subcell,
     335             :           tmpl::list<
     336             :               evolution::dg::subcell::Actions::SetSubcellGrid<volume_dim,
     337             :                                                               system, false>,
     338             :               Initialization::Actions::AddSimpleTags<
     339             :                   ScalarAdvection::subcell::VelocityAtFace<volume_dim>>,
     340             :               evolution::dg::subcell::Actions::SetAndCommunicateInitialRdmpData<
     341             :                   volume_dim,
     342             :                   ScalarAdvection::subcell::SetInitialRdmpData<volume_dim>>,
     343             :               evolution::dg::subcell::Actions::ComputeAndSendTciOnInitialGrid<
     344             :                   volume_dim, system,
     345             :                   ScalarAdvection::subcell::TciOnFdGrid<volume_dim>>,
     346             :               evolution::dg::subcell::Actions::SetInitialGridFromTciData<
     347             :                   volume_dim, system>>,
     348             :           tmpl::list<evolution::Initialization::Actions::SetVariables<
     349             :               domain::Tags::Coordinates<Dim, Frame::ElementLogical>>>>,
     350             : 
     351             :       Initialization::Actions::AddComputeTags<
     352             :           tmpl::list<ScalarAdvection::Tags::VelocityFieldCompute<Dim>>>,
     353             :       Initialization::Actions::AddComputeTags<
     354             :           StepChoosers::step_chooser_compute_tags<EvolutionMetavars,
     355             :                                                   local_time_stepping>>,
     356             :       ::evolution::dg::Initialization::Mortars<volume_dim>,
     357             :       tmpl::conditional_t<use_dg_subcell and local_time_stepping,
     358             :                           Initialization::Actions::InitializeItems<
     359             :                               evolution::dg::subcell::DisableLts<Dim>>,
     360             :                           tmpl::list<>>,
     361             :       evolution::Actions::InitializeRunEventsAndDenseTriggers,
     362             :       Parallel::Actions::TerminatePhase>;
     363             : 
     364           0 :   using dg_element_array = DgElementArray<
     365             :       EvolutionMetavars,
     366             :       tmpl::list<
     367             :           Parallel::PhaseActions<Parallel::Phase::Initialization,
     368             :                                  initialization_actions>,
     369             : 
     370             :           Parallel::PhaseActions<Parallel::Phase::Register,
     371             :                                  tmpl::list<dg_registration_list,
     372             :                                             Parallel::Actions::TerminatePhase>>,
     373             : 
     374             :           Parallel::PhaseActions<Parallel::Phase::Restart,
     375             :                                  tmpl::list<dg_registration_list,
     376             :                                             Parallel::Actions::TerminatePhase>>,
     377             : 
     378             :           Parallel::PhaseActions<
     379             :               Parallel::Phase::WriteCheckpoint,
     380             :               tmpl::list<evolution::Actions::RunEventsAndTriggers<
     381             :                              Triggers::WhenToCheck::AtCheckpoints>,
     382             :                          Parallel::Actions::TerminatePhase>>,
     383             : 
     384             :           Parallel::PhaseActions<
     385             :               Parallel::Phase::InitializeTimeStepperHistory,
     386             :               SelfStart::self_start_procedure<step_actions, system>>,
     387             : 
     388             :           Parallel::PhaseActions<
     389             :               Parallel::Phase::Evolve,
     390             :               tmpl::flatten<tmpl::list<
     391             :                   std::conditional_t<local_time_stepping,
     392             :                                      evolution::Actions::RunEventsAndTriggers<
     393             :                                          Triggers::WhenToCheck::AtSteps>,
     394             :                                      tmpl::list<>>,
     395             :                   evolution::Actions::RunEventsAndTriggers<
     396             :                       Triggers::WhenToCheck::AtSlabs>,
     397             :                   Actions::ChangeSlabSize, step_actions,
     398             :                   Actions::MutateApply<AdvanceTime<>>,
     399             :                   PhaseControl::Actions::ExecutePhaseChange>>>>>;
     400             : 
     401             :   struct registration
     402             :       : tt::ConformsTo<Parallel::protocols::RegistrationMetavariables> {
     403           0 :     using element_registrars =
     404             :         tmpl::map<tmpl::pair<dg_element_array, dg_registration_list>>;
     405             :   };
     406             : 
     407           0 :   using component_list =
     408             :       tmpl::list<observers::Observer<EvolutionMetavars>,
     409             :                  observers::ObserverWriter<EvolutionMetavars>,
     410             :                  dg_element_array>;
     411             : 
     412             :   static constexpr Options::String help{
     413             :       "Evolve the scalar advection equation.\n\n"};
     414             : 
     415             :   static constexpr std::array<Parallel::Phase, 5> default_phase_order{
     416             :       {Parallel::Phase::Initialization,
     417             :        Parallel::Phase::InitializeTimeStepperHistory, Parallel::Phase::Register,
     418             :        Parallel::Phase::Evolve, Parallel::Phase::Exit}};
     419             : 
     420             :   // NOLINTNEXTLINE(google-runtime-references)
     421           0 :   void pup(PUP::er& /*p*/) {}
     422             : };

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