Tags.hpp

// Distributed under the MIT License.
// See LICENSE.txt for details.
 
#pragma once
 
#include <string>
 
#include "DataStructures/DataBox/Tag.hpp"
#include "Options/Options.hpp"
#include "Utilities/TMPL.hpp"
 
namespace LinearSolver::Richardson {
 
namespace OptionTags {
 
template <typename OptionsGroup>
struct RelaxationParameter {
  using type = double;
  using group = OptionsGroup;
  static constexpr Options::String help =
      "The weight for the residual in the scheme";
};
 
}  // namespace OptionTags
 
namespace Tags {
 
/// The Richardson relaxation parameter \f$\omega\f$
///
/// \see `LinearSolver::Richardson::Richardson`
template <typename OptionsGroup>
struct RelaxationParameter : db::SimpleTag {
  static std::string name() noexcept {
    return "RelaxationParameter(" + Options::name<OptionsGroup>() + ")";
  }
  using type = double;
 
  static constexpr bool pass_metavariables = false;
  using option_tags = tmpl::list<OptionTags::RelaxationParameter<OptionsGroup>>;
  static double create_from_options(const double value) noexcept {
    return value;
  }
};
 
}  // namespace Tags
 
}  // namespace LinearSolver::Richardson