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 <string>
       8              : 
       9              : #include "DataStructures/DataBox/Tag.hpp"
      10              : #include "DataStructures/DataVector.hpp"
      11              : #include "DataStructures/Tensor/Tensor.hpp"
      12              : #include "Evolution/Systems/CurvedScalarWave/TagsDeclarations.hpp"
      13              : #include "Utilities/Gsl.hpp"
      14              : 
      15              : namespace CurvedScalarWave::Tags {
      16              : /*!
      17              :  * \brief The square of the scalar field \f$\Psi\f$.
      18              :  */
      19            1 : struct PsiSquared : db::SimpleTag {
      20            0 :   using type = Scalar<DataVector>;
      21              : };
      22              : 
      23              : /*!
      24              :  * \brief Compute tag that calculates the square of the scalar field \f$\Psi\f$.
      25              :  */
      26            1 : struct PsiSquaredCompute : PsiSquared, db::ComputeTag {
      27            0 :   using base = PsiSquared;
      28            0 :   using return_type = Scalar<DataVector>;
      29            0 :   using argument_tags = tmpl::list<CurvedScalarWave::Tags::Psi>;
      30            0 :   static void function(const gsl::not_null<Scalar<DataVector>*> psi_squared,
      31              :                        const Scalar<DataVector>& psi) {
      32              :     get(*psi_squared) = get(psi) * get(psi);
      33              :   }
      34              : };
      35              : }  // namespace CurvedScalarWave::Tags