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 #ifndef DataFormats_SoATemplate_interface_SoACommon_h
 #define DataFormats_SoATemplate_interface_SoACommon_h
 
 /*
  * Definitions of SoA common parameters for SoA class generators
  */
 
 #include <cstdint>
 #include <cassert>
 #include <ostream>
 #include <tuple>
 #include <type_traits>
 
 #include <boost/preprocessor.hpp>
 
 #include "FWCore/Utilities/interface/typedefs.h"
 
 // CUDA attributes
 #ifdef __CUDACC__
 #define SOA_HOST_ONLY __host__
 #define SOA_DEVICE_ONLY __device__
 #define SOA_HOST_DEVICE __host__ __device__
 #define SOA_INLINE __forceinline__
 #else
 #define SOA_HOST_ONLY
 #define SOA_DEVICE_ONLY
 #define SOA_HOST_DEVICE
 #define SOA_INLINE inline __attribute__((always_inline))
 #endif
 
 // Exception throwing (or willful crash in kernels)
 #if defined(__CUDACC__) && defined(__CUDA_ARCH__)
 #define SOA_THROW_OUT_OF_RANGE(A) \
   {                               \
     printf("%s\n", (A));          \
     __trap();                     \
   }
 #else
 #define SOA_THROW_OUT_OF_RANGE(A) \
   { throw std::out_of_range(A); }
 #endif
 
 /* declare "scalars" (one value shared across the whole SoA) and "columns" (one value per element) */
 #define _VALUE_TYPE_SCALAR 0
 #define _VALUE_TYPE_COLUMN 1
 #define _VALUE_TYPE_EIGEN_COLUMN 2
 
 /* The size type need to be "hardcoded" in the template parameters for classes serialized by ROOT */
 #define CMS_SOA_BYTE_SIZE_TYPE std::size_t
 
 namespace cms::soa {
 
   // size_type for indices. Compatible with ROOT Int_t, but limited to 2G entries
   using size_type = cms_int32_t;
   // byte_size_type for byte counts. Not creating an artificial limit (and not ROOT serialized).
   using byte_size_type = CMS_SOA_BYTE_SIZE_TYPE;
 
   enum class SoAColumnType {
     scalar = _VALUE_TYPE_SCALAR,
     column = _VALUE_TYPE_COLUMN,
     eigen = _VALUE_TYPE_EIGEN_COLUMN
   };
 
   namespace RestrictQualify {
     constexpr bool enabled = true;
     constexpr bool disabled = false;
     constexpr bool Default = disabled;
   }  // namespace RestrictQualify
 
   namespace RangeChecking {
     constexpr bool enabled = true;
     constexpr bool disabled = false;
     constexpr bool Default = disabled;
   }  // namespace RangeChecking
 
   template <typename T, bool RESTRICT_QUALIFY>
   struct add_restrict {};
 
   template <typename T>
   struct add_restrict<T, RestrictQualify::enabled> {
     using Value = T;
     using Pointer = T* __restrict__;
     using Reference = T& __restrict__;
     using ConstValue = const T;
     using PointerToConst = const T* __restrict__;
     using ReferenceToConst = const T& __restrict__;
   };
 
   template <typename T>
   struct add_restrict<T, RestrictQualify::disabled> {
     using Value = T;
     using Pointer = T*;
     using Reference = T&;
     using ConstValue = const T;
     using PointerToConst = const T*;
     using ReferenceToConst = const T&;
   };
 
   // Forward declarations
   template <SoAColumnType COLUMN_TYPE, typename T>
   struct SoAConstParametersImpl;
 
   template <SoAColumnType COLUMN_TYPE, typename T>
   struct SoAParametersImpl;
 
   // Templated const parameter sets for scalars, columns and Eigen columns
   template <SoAColumnType COLUMN_TYPE, typename T>
   struct SoAConstParametersImpl {
     static constexpr SoAColumnType columnType = COLUMN_TYPE;
 
     using ValueType = T;
     using ScalarType = T;
     using TupleOrPointerType = const ValueType*;
 
     // default constructor
     SoAConstParametersImpl() = default;
 
     // constructor from an address
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAConstParametersImpl(ValueType const* addr) : addr_(addr) {}
 
     // constructor from a non-const parameter set
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAConstParametersImpl(SoAParametersImpl<columnType, ValueType> const& o)
         : addr_{o.addr_} {}
 
     static constexpr bool checkAlignment(ValueType* addr, byte_size_type alignment) {
       return reinterpret_cast<intptr_t>(addr) % alignment;
     }
 
   public:
     // scalar or column
     ValueType const* addr_ = nullptr;
   };
 
   // Templated const parameter specialisation for Eigen columns
   template <typename T>
   struct SoAConstParametersImpl<SoAColumnType::eigen, T> {
     static constexpr SoAColumnType columnType = SoAColumnType::eigen;
 
     using ValueType = T;
     using ScalarType = typename T::Scalar;
     using TupleOrPointerType = std::tuple<ScalarType*, byte_size_type>;
 
     // default constructor
     SoAConstParametersImpl() = default;
 
     // constructor from individual address and stride
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAConstParametersImpl(ScalarType const* addr, byte_size_type stride)
         : addr_(addr), stride_(stride) {}
 
     // constructor from address and stride packed in a tuple
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAConstParametersImpl(TupleOrPointerType const& tuple)
         : addr_(std::get<0>(tuple)), stride_(std::get<1>(tuple)) {}
 
     // constructor from a non-const parameter set
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAConstParametersImpl(SoAParametersImpl<columnType, ValueType> const& o)
         : addr_{o.addr_}, stride_{o.stride_} {}
 
     static constexpr bool checkAlignment(TupleOrPointerType const& tuple, byte_size_type alignment) {
       const auto& [addr, stride] = tuple;
       return reinterpret_cast<intptr_t>(addr) % alignment;
     }
 
   public:
     // address and stride
     ScalarType const* addr_ = nullptr;
     byte_size_type stride_ = 0;
   };
 
   // Matryoshka template to avoid commas inside macros
   template <SoAColumnType COLUMN_TYPE>
   struct SoAConstParameters_ColumnType {
     template <typename T>
     using DataType = SoAConstParametersImpl<COLUMN_TYPE, T>;
   };
 
   // Templated parameter sets for scalars, columns and Eigen columns
   template <SoAColumnType COLUMN_TYPE, typename T>
   struct SoAParametersImpl {
     static constexpr SoAColumnType columnType = COLUMN_TYPE;
 
     using ValueType = T;
     using ScalarType = T;
     using TupleOrPointerType = ValueType*;
 
     using ConstType = SoAConstParametersImpl<columnType, ValueType>;
     friend ConstType;
 
     // default constructor
     SoAParametersImpl() = default;
 
     // constructor from an address
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAParametersImpl(ValueType* addr) : addr_(addr) {}
 
     static constexpr bool checkAlignment(ValueType* addr, byte_size_type alignment) {
       return reinterpret_cast<intptr_t>(addr) % alignment;
     }
 
   public:
     // scalar or column
     ValueType* addr_ = nullptr;
   };
 
   // Templated parameter specialisation for Eigen columns
   template <typename T>
   struct SoAParametersImpl<SoAColumnType::eigen, T> {
     static constexpr SoAColumnType columnType = SoAColumnType::eigen;
 
     using ValueType = T;
     using ScalarType = typename T::Scalar;
     using TupleOrPointerType = std::tuple<ScalarType*, byte_size_type>;
 
     using ConstType = SoAConstParametersImpl<columnType, ValueType>;
     friend ConstType;
 
     // default constructor
     SoAParametersImpl() = default;
 
     // constructor from individual address and stride
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAParametersImpl(ScalarType* addr, byte_size_type stride)
         : addr_(addr), stride_(stride) {}
 
     // constructor from address and stride packed in a tuple
     SOA_HOST_DEVICE SOA_INLINE constexpr SoAParametersImpl(TupleOrPointerType const& tuple)
         : addr_(std::get<0>(tuple)), stride_(std::get<1>(tuple)) {}
 
     static constexpr bool checkAlignment(TupleOrPointerType const& tuple, byte_size_type alignment) {
       const auto& [addr, stride] = tuple;
       return reinterpret_cast<intptr_t>(addr) % alignment;
     }
 
   public:
     // address and stride
     ScalarType* addr_ = nullptr;
     byte_size_type stride_ = 0;
   };
 
   // Matryoshka template to avoid commas inside macros
   template <SoAColumnType COLUMN_TYPE>
   struct SoAParameters_ColumnType {
     template <typename T>
     using DataType = SoAParametersImpl<COLUMN_TYPE, T>;
   };
 
   // Helper converting a const parameter set to a non-const parameter set, to be used only in the constructor of non-const "element"
   namespace {
     template <typename T>
     constexpr inline std::remove_const_t<T>* non_const_ptr(T* p) {
       return const_cast<std::remove_const_t<T>*>(p);
     }
   }  // namespace
 
   template <SoAColumnType COLUMN_TYPE, typename T>
   SOA_HOST_DEVICE SOA_INLINE constexpr SoAParametersImpl<COLUMN_TYPE, T> const_cast_SoAParametersImpl(
       SoAConstParametersImpl<COLUMN_TYPE, T> const& o) {
     return SoAParametersImpl<COLUMN_TYPE, T>{non_const_ptr(o.addr_)};
   }
 
   template <typename T>
   SOA_HOST_DEVICE SOA_INLINE constexpr SoAParametersImpl<SoAColumnType::eigen, T> const_cast_SoAParametersImpl(
       SoAConstParametersImpl<SoAColumnType::eigen, T> const& o) {
     return SoAParametersImpl<SoAColumnType::eigen, T>{non_const_ptr(o.addr_), o.stride_};
   }
 
   // Helper template managing the value at index idx within a column.
   // The optional compile time alignment parameter enables informing the
   // compiler of alignment (enforced by caller).
   template <SoAColumnType COLUMN_TYPE,
             typename T,
             byte_size_type ALIGNMENT,
             bool RESTRICT_QUALIFY = RestrictQualify::disabled>
   class SoAValue {
     // Eigen is implemented in a specialization
     static_assert(COLUMN_TYPE != SoAColumnType::eigen);
 
   public:
     using Restr = add_restrict<T, RESTRICT_QUALIFY>;
     using Val = typename Restr::Value;
     using Ptr = typename Restr::Pointer;
     using Ref = typename Restr::Reference;
     using PtrToConst = typename Restr::PointerToConst;
     using RefToConst = typename Restr::ReferenceToConst;
 
     SOA_HOST_DEVICE SOA_INLINE SoAValue(size_type i, T* col) : idx_(i), col_(col) {}
 
     SOA_HOST_DEVICE SOA_INLINE SoAValue(size_type i, SoAParametersImpl<COLUMN_TYPE, T> params)
         : idx_(i), col_(params.addr_) {}
 
     SOA_HOST_DEVICE SOA_INLINE Ref operator()() {
       // Ptr type will add the restrict qualifyer if needed
       Ptr col = alignedCol();
       return col[idx_];
     }
 
     SOA_HOST_DEVICE SOA_INLINE RefToConst operator()() const {
       // PtrToConst type will add the restrict qualifyer if needed
       PtrToConst col = alignedCol();
       return col[idx_];
     }
 
     SOA_HOST_DEVICE SOA_INLINE Ptr operator&() { return &alignedCol()[idx_]; }
 
     SOA_HOST_DEVICE SOA_INLINE PtrToConst operator&() const { return &alignedCol()[idx_]; }
 
     /* This was an attempt to implement the syntax
      *
      *     old_value = view.x
      *     view.x = new_value
      *
      * instead of
      *
      *     old_value = view.x()
      *     view.x() = new_value
      *
      *  but it was found to break in some corner cases.
      *  We keep them commented out for the time being.
 
     SOA_HOST_DEVICE SOA_INLINE operator T&() { return col_[idx_]; }
 
     template <typename T2>
     SOA_HOST_DEVICE SOA_INLINE Ref operator=(const T2& v) {
       return alignedCol()[idx_] = v;
     }
     */
 
     using valueType = Val;
 
     static constexpr auto valueSize = sizeof(T);
 
   private:
     SOA_HOST_DEVICE SOA_INLINE Ptr alignedCol() const {
       if constexpr (ALIGNMENT) {
         return reinterpret_cast<Ptr>(__builtin_assume_aligned(col_, ALIGNMENT));
       }
       return reinterpret_cast<Ptr>(col_);
     }
 
     size_type idx_;
     T* col_;
   };
 
   // Eigen/Core should be pre-included before the SoA headers to enable support for Eigen columns.
 #ifdef EIGEN_WORLD_VERSION
   // Helper template managing an Eigen-type value at index idx within a column.
   template <class C, byte_size_type ALIGNMENT, bool RESTRICT_QUALIFY>
   class SoAValue<SoAColumnType::eigen, C, ALIGNMENT, RESTRICT_QUALIFY> {
   public:
     using Type = C;
     using MapType = Eigen::Map<C, 0, Eigen::InnerStride<Eigen::Dynamic>>;
     using CMapType = const Eigen::Map<const C, 0, Eigen::InnerStride<Eigen::Dynamic>>;
     using Restr = add_restrict<typename C::Scalar, RESTRICT_QUALIFY>;
     using Val = typename Restr::Value;
     using Ptr = typename Restr::Pointer;
     using Ref = typename Restr::Reference;
     using PtrToConst = typename Restr::PointerToConst;
     using RefToConst = typename Restr::ReferenceToConst;
 
     SOA_HOST_DEVICE SOA_INLINE SoAValue(size_type i, typename C::Scalar* col, byte_size_type stride)
         : val_(col + i, C::RowsAtCompileTime, C::ColsAtCompileTime, Eigen::InnerStride<Eigen::Dynamic>(stride)),
           crCol_(col),
           cVal_(crCol_ + i, C::RowsAtCompileTime, C::ColsAtCompileTime, Eigen::InnerStride<Eigen::Dynamic>(stride)),
           stride_(stride) {}
 
     SOA_HOST_DEVICE SOA_INLINE SoAValue(size_type i, SoAParametersImpl<SoAColumnType::eigen, C> params)
         : val_(params.addr_ + i,
                C::RowsAtCompileTime,
                C::ColsAtCompileTime,
                Eigen::InnerStride<Eigen::Dynamic>(params.stride_)),
           crCol_(params.addr_),
           cVal_(crCol_ + i,
                 C::RowsAtCompileTime,
                 C::ColsAtCompileTime,
                 Eigen::InnerStride<Eigen::Dynamic>(params.stride_)),
           stride_(params.stride_) {}
 
     SOA_HOST_DEVICE SOA_INLINE MapType& operator()() { return val_; }
 
     SOA_HOST_DEVICE SOA_INLINE const CMapType& operator()() const { return cVal_; }
 
     SOA_HOST_DEVICE SOA_INLINE operator C() { return val_; }
 
     SOA_HOST_DEVICE SOA_INLINE operator const C() const { return cVal_; }
 
     SOA_HOST_DEVICE SOA_INLINE C* operator&() { return &val_; }
 
     SOA_HOST_DEVICE SOA_INLINE const C* operator&() const { return &cVal_; }
 
     template <class C2>
     SOA_HOST_DEVICE SOA_INLINE MapType& operator=(const C2& v) {
       return val_ = v;
     }
 
     using ValueType = typename C::Scalar;
     static constexpr auto valueSize = sizeof(C::Scalar);
     SOA_HOST_DEVICE SOA_INLINE byte_size_type stride() const { return stride_; }
 
   private:
     MapType val_;
     const Ptr crCol_;
     CMapType cVal_;
     byte_size_type stride_;
   };
 #else
   // Raise a compile-time error
   template <class C, byte_size_type ALIGNMENT, bool RESTRICT_QUALIFY>
   class SoAValue<SoAColumnType::eigen, C, ALIGNMENT, RESTRICT_QUALIFY> {
     static_assert(!sizeof(C),
                   "Eigen/Core should be pre-included before the SoA headers to enable support for Eigen columns.");
   };
 #endif
 
   // Helper template managing a const value at index idx within a column.
   template <SoAColumnType COLUMN_TYPE,
             typename T,
             byte_size_type ALIGNMENT,
             bool RESTRICT_QUALIFY = RestrictQualify::disabled>
   class SoAConstValue {
     // Eigen is implemented in a specialization
     static_assert(COLUMN_TYPE != SoAColumnType::eigen);
 
   public:
     using Restr = add_restrict<T, RESTRICT_QUALIFY>;
     using Val = typename Restr::Value;
     using Ptr = typename Restr::Pointer;
     using Ref = typename Restr::Reference;
     using PtrToConst = typename Restr::PointerToConst;
     using RefToConst = typename Restr::ReferenceToConst;
     using Params = SoAParametersImpl<COLUMN_TYPE, T>;
     using ConstParams = SoAConstParametersImpl<COLUMN_TYPE, T>;
 
     SOA_HOST_DEVICE SOA_INLINE SoAConstValue(size_type i, const T* col) : idx_(i), col_(col) {}
 
     SOA_HOST_DEVICE SOA_INLINE SoAConstValue(size_type i, SoAParametersImpl<COLUMN_TYPE, T> params)
         : idx_(i), col_(params.addr_) {}
 
     SOA_HOST_DEVICE SOA_INLINE SoAConstValue(size_type i, SoAConstParametersImpl<COLUMN_TYPE, T> params)
         : idx_(i), col_(params.addr_) {}
 
     SOA_HOST_DEVICE SOA_INLINE RefToConst operator()() const {
       // Ptr type will add the restrict qualifyer if needed
       PtrToConst col = alignedCol();
       return col[idx_];
     }
 
     SOA_HOST_DEVICE SOA_INLINE const T* operator&() const { return &alignedCol()[idx_]; }
 
     /* This was an attempt to implement the syntax
      *
      *     old_value = view.x
      *
      * instead of
      *
      *     old_value = view.x()
      *
      *  but it was found to break in some corner cases.
      *  We keep them commented out for the time being.
 
     SOA_HOST_DEVICE SOA_INLINE operator T&() { return col_[idx_]; }
     */
 
     using valueType = T;
     static constexpr auto valueSize = sizeof(T);
 
   private:
     SOA_HOST_DEVICE SOA_INLINE PtrToConst alignedCol() const {
       if constexpr (ALIGNMENT) {
         return reinterpret_cast<PtrToConst>(__builtin_assume_aligned(col_, ALIGNMENT));
       }
       return reinterpret_cast<PtrToConst>(col_);
     }
 
     size_type idx_;
     const T* col_;
   };
 
   // Eigen/Core should be pre-included before the SoA headers to enable support for Eigen columns.
 #ifdef EIGEN_WORLD_VERSION
   // Helper template managing a const Eigen-type value at index idx within a column.
   template <class C, byte_size_type ALIGNMENT, bool RESTRICT_QUALIFY>
   class SoAConstValue<SoAColumnType::eigen, C, ALIGNMENT, RESTRICT_QUALIFY> {
   public:
     using Type = C;
     using CMapType = Eigen::Map<const C, 0, Eigen::InnerStride<Eigen::Dynamic>>;
     using RefToConst = const CMapType&;
     using ConstParams = SoAConstParametersImpl<SoAColumnType::eigen, C>;
 
     SOA_HOST_DEVICE SOA_INLINE SoAConstValue(size_type i, typename C::Scalar* col, byte_size_type stride)
         : crCol_(col),
           cVal_(crCol_ + i, C::RowsAtCompileTime, C::ColsAtCompileTime, Eigen::InnerStride<Eigen::Dynamic>(stride)),
           stride_(stride) {}
 
     SOA_HOST_DEVICE SOA_INLINE SoAConstValue(size_type i, SoAConstParametersImpl<SoAColumnType::eigen, C> params)
         : crCol_(params.addr_),
           cVal_(crCol_ + i,
                 C::RowsAtCompileTime,
                 C::ColsAtCompileTime,
                 Eigen::InnerStride<Eigen::Dynamic>(params.stride_)),
           stride_(params.stride_) {}
 
     SOA_HOST_DEVICE SOA_INLINE const CMapType& operator()() const { return cVal_; }
 
     SOA_HOST_DEVICE SOA_INLINE operator const C() const { return cVal_; }
 
     SOA_HOST_DEVICE SOA_INLINE const C* operator&() const { return &cVal_; }
 
     using ValueType = typename C::Scalar;
     static constexpr auto valueSize = sizeof(C::Scalar);
 
     SOA_HOST_DEVICE SOA_INLINE byte_size_type stride() const { return stride_; }
 
   private:
     const typename C::Scalar* __restrict__ crCol_;
     CMapType cVal_;
     byte_size_type stride_;
   };
 #else
   // Raise a compile-time error
   template <class C, byte_size_type ALIGNMENT, bool RESTRICT_QUALIFY>
   class SoAConstValue<SoAColumnType::eigen, C, ALIGNMENT, RESTRICT_QUALIFY> {
     static_assert(!sizeof(C),
                   "Eigen/Core should be pre-included before the SoA headers to enable support for Eigen columns.");
   };
 #endif
 
   // Helper template to avoid commas inside macros
 #ifdef EIGEN_WORLD_VERSION
   template <class C>
   struct EigenConstMapMaker {
     using Type = Eigen::Map<const C, Eigen::AlignmentType::Unaligned, Eigen::InnerStride<Eigen::Dynamic>>;
 
     class DataHolder {
     public:
       DataHolder(const typename C::Scalar* data) : data_(data) {}
 
       EigenConstMapMaker::Type withStride(byte_size_type stride) {
         return EigenConstMapMaker::Type(
             data_, C::RowsAtCompileTime, C::ColsAtCompileTime, Eigen::InnerStride<Eigen::Dynamic>(stride));
       }
 
     private:
       const typename C::Scalar* const data_;
     };
 
     static DataHolder withData(const typename C::Scalar* data) { return DataHolder(data); }
   };
 #else
   template <class C>
   struct EigenConstMapMaker {
     // Eigen/Core should be pre-included before the SoA headers to enable support for Eigen columns.
     static_assert(!sizeof(C),
                   "Eigen/Core should be pre-included before the SoA headers to enable support for Eigen columns.");
   };
 #endif
 
   // Helper function to compute aligned size
   constexpr inline byte_size_type alignSize(byte_size_type size, byte_size_type alignment) {
     return ((size + alignment - 1) / alignment) * alignment;
   }
 
 }  // namespace cms::soa
 
 #define SOA_SCALAR(TYPE, NAME) (_VALUE_TYPE_SCALAR, TYPE, NAME)
 #define SOA_COLUMN(TYPE, NAME) (_VALUE_TYPE_COLUMN, TYPE, NAME)
 #define SOA_EIGEN_COLUMN(TYPE, NAME) (_VALUE_TYPE_EIGEN_COLUMN, TYPE, NAME)
 
 /* Iterate on the macro MACRO and return the result as a comma separated list */
 #define _ITERATE_ON_ALL_COMMA(MACRO, DATA, ...) \
   BOOST_PP_TUPLE_ENUM(BOOST_PP_SEQ_TO_TUPLE(_ITERATE_ON_ALL(MACRO, DATA, __VA_ARGS__)))
 
 /* Iterate MACRO on all elements */
 #define _ITERATE_ON_ALL(MACRO, DATA, ...) BOOST_PP_SEQ_FOR_EACH(MACRO, DATA, BOOST_PP_VARIADIC_TO_SEQ(__VA_ARGS__))
 
 /* Switch on macros depending on scalar / column type */
 #define _SWITCH_ON_TYPE(VALUE_TYPE, IF_SCALAR, IF_COLUMN, IF_EIGEN_COLUMN) \
   BOOST_PP_IF(                                                             \
       BOOST_PP_EQUAL(VALUE_TYPE, _VALUE_TYPE_SCALAR),                      \
       IF_SCALAR,                                                           \
       BOOST_PP_IF(                                                         \
           BOOST_PP_EQUAL(VALUE_TYPE, _VALUE_TYPE_COLUMN),                  \
           IF_COLUMN,                                                       \
           BOOST_PP_IF(BOOST_PP_EQUAL(VALUE_TYPE, _VALUE_TYPE_EIGEN_COLUMN), IF_EIGEN_COLUMN, BOOST_PP_EMPTY())))
 
 namespace cms::soa {
 
   /* Column accessors: templates implementing the global accesors (soa::x() and soa::x(index) */
   enum class SoAAccessType : bool { mutableAccess, constAccess };
 
   template <typename, SoAColumnType, SoAAccessType>
   struct SoAColumnAccessorsImpl {};
 
   // TODO from Eric Cano:
   //   - add alignment support
   //   - SFINAE-based const/non const variants
 
   // Column
   template <typename T>
   struct SoAColumnAccessorsImpl<T, SoAColumnType::column, SoAAccessType::mutableAccess> {
     //SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(T* baseAddress) : baseAddress_(baseAddress) {}
     SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(const SoAParametersImpl<SoAColumnType::column, T>& params)
         : params_(params) {}
     SOA_HOST_DEVICE SOA_INLINE T* operator()() { return params_.addr_; }
     using NoParamReturnType = T*;
     SOA_HOST_DEVICE SOA_INLINE T& operator()(size_type index) { return params_.addr_[index]; }
 
   private:
     SoAParametersImpl<SoAColumnType::column, T> params_;
   };
 
   // Const column
   template <typename T>
   struct SoAColumnAccessorsImpl<T, SoAColumnType::column, SoAAccessType::constAccess> {
     SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(const SoAConstParametersImpl<SoAColumnType::column, T>& params)
         : params_(params) {}
     SOA_HOST_DEVICE SOA_INLINE const T* operator()() const { return params_.addr_; }
     using NoParamReturnType = const T*;
     SOA_HOST_DEVICE SOA_INLINE T operator()(size_type index) const { return params_.addr_[index]; }
 
   private:
     SoAConstParametersImpl<SoAColumnType::column, T> params_;
   };
 
   // Scalar
   template <typename T>
   struct SoAColumnAccessorsImpl<T, SoAColumnType::scalar, SoAAccessType::mutableAccess> {
     SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(const SoAParametersImpl<SoAColumnType::scalar, T>& params)
         : params_(params) {}
     SOA_HOST_DEVICE SOA_INLINE T& operator()() { return *params_.addr_; }
     using NoParamReturnType = T&;
     SOA_HOST_DEVICE SOA_INLINE void operator()(size_type index) const {
       assert(false && "Indexed access impossible for SoA scalars.");
     }
 
   private:
     SoAParametersImpl<SoAColumnType::scalar, T> params_;
   };
 
   // Const scalar
   template <typename T>
   struct SoAColumnAccessorsImpl<T, SoAColumnType::scalar, SoAAccessType::constAccess> {
     SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(const SoAConstParametersImpl<SoAColumnType::scalar, T>& params)
         : params_(params) {}
     SOA_HOST_DEVICE SOA_INLINE T operator()() const { return *params_.addr_; }
     using NoParamReturnType = T;
     SOA_HOST_DEVICE SOA_INLINE void operator()(size_type index) const {
       assert(false && "Indexed access impossible for SoA scalars.");
     }
 
   private:
     SoAConstParametersImpl<SoAColumnType::scalar, T> params_;
   };
 
   // Eigen-type
   template <typename T>
   struct SoAColumnAccessorsImpl<T, SoAColumnType::eigen, SoAAccessType::mutableAccess> {
     //SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(T* baseAddress) : baseAddress_(baseAddress) {}
     SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(const SoAParametersImpl<SoAColumnType::eigen, T>& params)
         : params_(params) {}
     SOA_HOST_DEVICE SOA_INLINE typename T::Scalar* operator()() { return params_.addr_; }
     using NoParamReturnType = typename T::Scalar*;
     //SOA_HOST_DEVICE SOA_INLINE T& operator()(size_type index) { return params_.addr_[index]; }
 
   private:
     SoAParametersImpl<SoAColumnType::eigen, T> params_;
   };
 
   // Const Eigen-type
   template <typename T>
   struct SoAColumnAccessorsImpl<T, SoAColumnType::eigen, SoAAccessType::constAccess> {
     SOA_HOST_DEVICE SOA_INLINE SoAColumnAccessorsImpl(const SoAConstParametersImpl<SoAColumnType::eigen, T>& params)
         : params_(params) {}
     SOA_HOST_DEVICE SOA_INLINE const typename T::Scalar* operator()() const { return params_.addr_; }
     using NoParamReturnType = typename T::Scalar*;
     //SOA_HOST_DEVICE SOA_INLINE T operator()(size_type index) const { return params_.addr_[index]; }
 
   private:
     SoAConstParametersImpl<SoAColumnType::eigen, T> params_;
   };
 
   /* A helper template stager to avoid commas inside macros */
   template <typename T>
   struct SoAAccessors {
     template <auto columnType>
     struct ColumnType {
       template <auto accessType>
       struct AccessType : public SoAColumnAccessorsImpl<T, columnType, accessType> {
         using SoAColumnAccessorsImpl<T, columnType, accessType>::SoAColumnAccessorsImpl;
       };
     };
   };
 
   /* Enum parameters allowing templated control of layout/view behaviors */
   /* Alignment enforcement verifies every column is aligned, and
    * hints the compiler that it can expect column pointers to be aligned */
   struct AlignmentEnforcement {
     static constexpr bool relaxed = false;
     static constexpr bool enforced = true;
   };
 
   struct CacheLineSize {
     static constexpr byte_size_type NvidiaGPU = 128;
     static constexpr byte_size_type IntelCPU = 64;
     static constexpr byte_size_type AMDCPU = 64;
     static constexpr byte_size_type ARMCPU = 64;
     static constexpr byte_size_type defaultSize = NvidiaGPU;
   };
 
 }  // namespace cms::soa
 
 // Small wrapper for stream insertion of SoA printing
 template <typename SOA,
           typename SFINAE =
               typename std::enable_if_t<std::is_invocable_v<decltype(&SOA::soaToStreamInternal), SOA&, std::ostream&>>>
 SOA_HOST_ONLY std::ostream& operator<<(std::ostream& os, const SOA& soa) {
   soa.soaToStreamInternal(os);
   return os;
 }
 
 #endif  // DataFormats_SoATemplate_interface_SoACommon_h

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