Remove unnecessary struct

k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4Lcio2EDM4hepConv.h

@@ -159,33 +159,23 @@ std::unique_ptr<podio::CollectionBase> fillSubset(EVENT::LCCollection* LCCollect
 template <typename LCVecType>
 std::vector<CollNamePair> convertLCVec(const std::string& name, EVENT::LCCollection* LCCollection);
 
-/**
- * Helper struct to wrap the functionality of putting parameters into a Frame in
- * a semi type-erases way, such that it can easily be used as a template
- * parameter
- */
-struct ParamFramePutter {
-  ParamFramePutter() = delete;
-  ParamFramePutter(podio::Frame& f) : m_frame(f) {}
-
-  template <typename T>
-  void operator()(const std::string& key, const T& value) {
-    m_frame.putParameter(key, value);
-  }
-
-private:
-  podio::Frame& m_frame;
-};
-
 /**
  * Converting all parameters of an LCIO Object and passing them to the PutParamF
  * function that takes care of storing them appropriately.
  *
  * The indirection is necessary for better integration with k4FWCore where
  * direct access to a Frame is not possible, but a putParameter method is
  * available instead.
+ *
+ * The PutParamF has to provide the following interface
+ *
+ * template<typename T>
+ * void(std::string const&, T const&)
+ *
+ * It will be called for all T that are currently supported as parameters (int,
+ * float, double, std::string resp. std::vector of those).
  */
-template <typename LCIOType, typename PutParamF = ParamFramePutter>
+template <typename LCIOType, typename PutParamF>
 void convertObjectParameters(LCIOType* lcioobj, PutParamF putParamFun);
 
 /**
@@ -194,7 +184,7 @@ void convertObjectParameters(LCIOType* lcioobj, PutParamF putParamFun);
  */
 template <typename LCIOType>
 void convertObjectParameters(LCIOType* lcioobj, podio::Frame& event) {
-  convertObjectParameters(lcioobj, ParamFramePutter{event});
+  convertObjectParameters(lcioobj, [&event](const std::string& key, const auto& v) { event.putParameter(key, v); });
 }
 
 inline edm4hep::Vector3f Vector3fFrom(const double* v) { return edm4hep::Vector3f(v[0], v[1], v[2]); }