AMReX_MakeParticle.H

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#ifndef AMREX_MAKEPARTICLE_H_
#define AMREX_MAKEPARTICLE_H_
 
#include <type_traits>
 
namespace amrex {
 
template< class T >
struct is_soa_particle
     : std::integral_constant<
         bool,
         T::is_soa_particle
     > {};
 
 
template <typename T_ParticleType>
struct make_particle
{
    template <typename PTD>
    AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
    auto&
    operator() (PTD const& ptd, int i)
    {
        // legacy Particle (AoS)
        return ptd.m_aos[i];
    }
};
 
template <typename T_ParticleType>
requires (is_soa_particle<T_ParticleType>::value)
struct make_particle<T_ParticleType>
{
    template <typename PTD>
    AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
    auto
    operator() (PTD const& ptd, int index)
    {
        // SoAParticle
        return T_ParticleType(ptd, index);
    }
};
 
}
 
#endif