DecayProcess.hpp

/*
 * (c) Copyright 2020 CORSIKA Project, corsika-project@lists.kit.edu
 *
 * This software is distributed under the terms of the GNU General Public
 * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
 * the license.
 */

#pragma once

#include <corsika/framework/process/BaseProcess.hpp>
#include <corsika/framework/core/PhysicalUnits.hpp>

#include <corsika/detail/framework/process/DecayProcess.hpp> // for extra traits, method/interface checking

namespace corsika {

  template <typename TDerived>
  struct DecayProcess : BaseProcess<TDerived> {
  public:
    using BaseProcess<TDerived>::getRef;

    template <typename TParticle>
    InverseTimeType getInverseLifetime(TParticle const& particle) {

      // interface checking on TProcess1
      static_assert(has_method_getLifetime_v<TDerived, TimeType, TParticle const&>,
                    "TDerived has no method with correct signature \"GrammageType "
                    "getInteractionLength(TParticle const&)\" required for "
                    "InteractionProcess<TDerived>. ");

      return 1. / getRef().getLifetime(particle);
    }
  };

  template <typename TProcess>
  struct is_decay_process<
      TProcess,
      std::enable_if_t<std::is_base_of_v<DecayProcess<typename std::decay_t<TProcess>>,
                                         typename std::decay_t<TProcess>>>>
      : std::true_type {};

} // namespace corsika