SpECTRE Documentation Coverage Report
Current view: top level - PointwiseFunctions/AnalyticSolutions/Poisson - Zero.hpp Hit Total Coverage
Commit: ecb8a275e1aebab77dcce48a5e098ed4e486ab4b Lines: 1 15 6.7 %
Date: 2026-08-22 01:05:40
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          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 <pup.h>
       8             : 
       9             : #include "DataStructures/DataBox/Prefixes.hpp"
      10             : #include "DataStructures/DataVector.hpp"
      11             : #include "DataStructures/TaggedTuple.hpp"
      12             : #include "DataStructures/Tensor/Tensor.hpp"
      13             : #include "Elliptic/Systems/Poisson/Tags.hpp"
      14             : #include "NumericalAlgorithms/LinearOperators/PartialDerivatives.hpp"
      15             : #include "NumericalAlgorithms/Spectral/Mesh.hpp"
      16             : #include "Options/String.hpp"
      17             : #include "PointwiseFunctions/InitialDataUtilities/AnalyticSolution.hpp"
      18             : #include "Utilities/MakeWithValue.hpp"
      19             : #include "Utilities/Serialization/CharmPupable.hpp"
      20             : #include "Utilities/TMPL.hpp"
      21             : 
      22             : namespace Poisson::Solutions {
      23             : 
      24             : /// The trivial solution \f$u=0\f$ of a Poisson equation. Useful as initial
      25             : /// guess.
      26             : template <size_t Dim, typename DataType = DataVector>
      27           1 : class Zero : public elliptic::analytic_data::AnalyticSolution {
      28             :  public:
      29           0 :   using options = tmpl::list<>;
      30           0 :   static constexpr Options::String help{
      31             :       "The trivial solution, useful as initial guess."};
      32             : 
      33           0 :   Zero() = default;
      34           0 :   Zero(const Zero&) = default;
      35           0 :   Zero& operator=(const Zero&) = default;
      36           0 :   Zero(Zero&&) = default;
      37           0 :   Zero& operator=(Zero&&) = default;
      38           0 :   ~Zero() override = default;
      39           0 :   std::unique_ptr<elliptic::analytic_data::AnalyticSolution> get_clone()
      40             :       const override {
      41             :     return std::make_unique<Zero>(*this);
      42             :   }
      43             : 
      44             :   /// \cond
      45             :   explicit Zero(CkMigrateMessage* m)
      46             :       : elliptic::analytic_data::AnalyticSolution(m) {}
      47             :   using PUP::able::register_constructor;
      48             :   WRAPPED_PUPable_decl_template(Zero);  // NOLINT
      49             :   /// \endcond
      50             : 
      51             :   template <typename... RequestedTags>
      52           0 :   tuples::TaggedTuple<RequestedTags...> variables(
      53             :       const tnsr::I<DataVector, Dim>& x,
      54             :       tmpl::list<RequestedTags...> /*meta*/) const {
      55             :     using supported_tags = tmpl::list<
      56             :         Tags::Field<DataType>,
      57             :         ::Tags::deriv<Tags::Field<DataType>, tmpl::size_t<Dim>,
      58             :                       Frame::Inertial>,
      59             :         ::Tags::Flux<Tags::Field<DataType>, tmpl::size_t<Dim>, Frame::Inertial>,
      60             :         ::Tags::FixedSource<Tags::Field<DataType>>>;
      61             :     static_assert(tmpl::size<tmpl::list_difference<tmpl::list<RequestedTags...>,
      62             :                                                    supported_tags>>::value == 0,
      63             :                   "The requested tag is not supported");
      64             :     return {make_with_value<typename RequestedTags::type>(x, 0.)...};
      65             :   }
      66             : 
      67             :   template <typename... RequestedTags>
      68           0 :   tuples::TaggedTuple<RequestedTags...> variables(
      69             :       const tnsr::I<DataVector, Dim>& x, const Mesh<Dim>& /*mesh*/,
      70             :       const InverseJacobian<DataVector, Dim, Frame::ElementLogical,
      71             :                             Frame::Inertial>& /*inv_jacobian*/,
      72             :       tmpl::list<RequestedTags...> meta) const {
      73             :     return variables(x, meta);
      74             :   }
      75             : };
      76             : 
      77             : /// \cond
      78             : template <size_t Dim, typename DataType>
      79             : PUP::able::PUP_ID Zero<Dim, DataType>::my_PUP_ID = 0;  // NOLINT
      80             : /// \endcond
      81             : 
      82             : template <size_t Dim, typename DataType>
      83           0 : bool operator==(const Zero<Dim, DataType>& /*lhs*/,
      84             :                 const Zero<Dim, DataType>& /*rhs*/) {
      85             :   return true;
      86             : }
      87             : 
      88             : template <size_t Dim, typename DataType>
      89           0 : bool operator!=(const Zero<Dim, DataType>& lhs,
      90             :                 const Zero<Dim, DataType>& rhs) {
      91             :   return not(lhs == rhs);
      92             : }
      93             : 
      94             : }  // namespace Poisson::Solutions

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