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Implement StructOfArray::empty() and ParticleTile::empty() for pure SoA #3296

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May 4, 2023
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Implement StructOfArray::empty() and ParticleTile::empty() for pure SoA #3296

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4 changes: 4 additions & 0 deletions Src/Particle/AMReX_ParticleTile.H
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Original file line number Diff line number Diff line change
Expand Up @@ -746,8 +746,12 @@ struct ParticleTile
SoA& GetStructOfArrays () { return m_soa_tile; }
const SoA& GetStructOfArrays () const { return m_soa_tile; }

template <typename T = ParticleType, typename std::enable_if<!T::is_soa_particle, int>::type = 0>
bool empty () const { return m_aos_tile.empty(); }

template <typename T = ParticleType, typename std::enable_if<T::is_soa_particle, int>::type = 0>
bool empty () const { return m_soa_tile.empty(); }

/**
* \brief Returns the total number of particles (real and neighbor)
*
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6 changes: 6 additions & 0 deletions Src/Particle/AMReX_StructOfArrays.H
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Expand Up @@ -88,6 +88,12 @@ struct StructOfArrays {
return 0;
}

/**
* \brief Returns whether the SoA is empty (i.e. has size() == 0)
*
*/
[[nodiscard]] bool empty () const { return this->size() == 0; }

/**
* \brief Returns the number of real particles (excluding neighbors)
*
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