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 // AUTOMATICALLY GENERATED FILE - DO NOT EDIT
 
 #ifndef EDM4HEP_CovMatrix4f_H
 #define EDM4HEP_CovMatrix4f_H
 
 #include <array>
 #include <edm4hep/utils/cov_matrix_utils.h>
 #include <ostream>
 
 #if defined(PODIO_JSON_OUTPUT) && !defined(__CLING__)
 #include "nlohmann/json_fwd.hpp"
 #endif
 
 namespace edm4hep {
 
 /** @class CovMatrix4f
  *  A generic 4 dimensional covariance matrix with values stored in lower triangular form
  *  @author:
  */
 class CovMatrix4f {
 public:
   std::array<float, 10> values{}; ///< the covariance matrix values
 
   constexpr CovMatrix4f() = default;
   template <typename... Vs>
   constexpr CovMatrix4f(Vs... v) : values{static_cast<float>(v)...} {
     static_assert(sizeof...(v) == 10, "CovMatrix4f requires 10 values");
   }
   constexpr CovMatrix4f(const std::array<float, 10>& v) : values(v) {
   }
   constexpr CovMatrix4f& operator=(std::array<float, 10>& v) {
     values = v;
     return *this;
   }
   bool operator==(const CovMatrix4f& v) const {
     return v.values == values;
   }
   bool operator!=(const CovMatrix4f& v) const {
     return v.values != values;
   }
 
   // This file is meant to be included via the ExtraCode declarationFile directive
   // for the CovMatrixNx components. They live in this file because they
   // can be written very generically and reduce the clutter and code repetition in
   // the edm4hep.yaml file
   //
   // NOTE: All of these functions are intended to be member functions, and the
   // only member of a CovMatrixNx component is an appropriately sized std::array
   // named values.
   //
   // NOTE: It is also assumed that the edm4hep/utils/cov_matrix_utils.h header is
   // included via the corresponding ExtraCode: include directive
 
   /// Get the i-th element of the underlying storage
   ///
   /// \note The values are stored in a flat array assuming a lower
   /// triangular matrix representation
   constexpr float operator[](unsigned i) const {
     return values[i];
   }
 
   /// Get the i-th element of the underlying storage
   ///
   /// \note The values are stored in a flat array assuming a lower
   /// triangular matrix representation
   constexpr float& operator[](unsigned i) {
     return values[i];
   }
 
   /// Get the begin iterator to the underlying storage
   constexpr auto begin() const {
     return values.begin();
   }
 
   /// Get the begin iterator to the underlying storage
   constexpr auto begin() {
     return values.begin();
   }
 
   /// Get the end iterator to the underlying storage
   constexpr auto end() const {
     return values.end();
   }
 
   /// Get the end iterator to the underlying storage
   constexpr auto end() {
     return values.end();
   }
 
   /// Get a pointer to the underlying storage data
   auto* data() {
     return values.data();
   }
 
   /// Get a pointer to the underlying storage data
   const auto* data() const {
     return values.data();
   }
 
   /// Get the value of the covariance matrix for the passed dimensions
   ///
   /// @tparam DimEnum The enum (class) type that describes the dimensions of this
   ///                 covariance matrix. This will be deduced from the passed
   ///                 arguments!
   ///
   /// @param dimI The first dimension for which the covariance matrix value should
   ///             be obtained
   /// @param dimJ The second dimension for which the covariance matrix value
   ///             should be obtained
   ///
   /// @returns The value of the covariance matrix for dimension dimI and dimJ
   template <typename DimEnum>
   constexpr float getValue(DimEnum dimI, DimEnum dimJ) const {
     return edm4hep::utils::get_cov_value(values, dimI, dimJ);
   }
 
   /// Set the value of the covariance matrix for the passed dimensions
   ///
   /// @tparam DimEnum The enum (class) type that describes the dimensions of this
   ///                 covariance matrix. This will be deduced from the passed
   ///                 arguments!
   ///
   /// @param value The value to be set
   /// @param dimI  The first dimension for which the covariance matrix value
   ///              should be obtained
   /// @param dimJ  The second dimension for which the covariance matrix value
   ///              should be obtained
   template <typename DimEnum>
   constexpr void setValue(float value, DimEnum dimI, DimEnum dimJ) {
     utils::set_cov_value(value, values, dimI, dimJ);
   }
 };
 
 std::ostream& operator<<(std::ostream& o, const edm4hep::CovMatrix4f& value);
 
 #if defined(PODIO_JSON_OUTPUT) && !defined(__CLING__)
 void to_json(nlohmann::json& j, const CovMatrix4f& value);
 #endif
 
 } // namespace edm4hep
 
 #endif

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