[ntuple] implement RSoAField::AcceptVisitor()

Author: jblomer

tree/ntuple/inc/ROOT/RField/RFieldSoA.hxx

@@ -105,8 +105,7 @@ public:
    /// of any user object. If the class is not polymorphic, return nullptr.
    /// TODO(jblomer): use information in unique pointer field
    const std::type_info *GetPolymorphicTypeInfo() const;
-   // TODO(jblomer)
-   // void AcceptVisitor(ROOT::Detail::RFieldVisitor &visitor) const final;
+   void AcceptVisitor(ROOT::Detail::RFieldVisitor &visitor) const final;
 
    TClass *GetSoAClass() const { return fSoAClass; }
 };

tree/ntuple/inc/ROOT/RFieldVisitor.hxx

@@ -91,6 +91,7 @@ public:
    virtual void VisitVectorField(const ROOT::RVectorField &field) { VisitField(field); }
    virtual void VisitVectorBoolField(const ROOT::RField<std::vector<bool>> &field) { VisitField(field); }
    virtual void VisitRVecField(const ROOT::RRVecField &field) { VisitField(field); }
+   virtual void VisitSoAField(const ROOT::Experimental::RSoAField &field) { VisitField(field); }
 }; // class RFieldVisitor
 
 } // namespace Detail

tree/ntuple/src/RFieldMeta.cxx

@@ -911,6 +911,11 @@ const std::type_info *ROOT::Experimental::RSoAField::GetPolymorphicTypeInfo() co
    return fSoAClass->GetTypeInfo();
 }
 
+void ROOT::Experimental::RSoAField::AcceptVisitor(ROOT::Detail::RFieldVisitor &visitor) const
+{
+   visitor.VisitSoAField(*this);
+}
+
 //------------------------------------------------------------------------------
 
 ROOT::REnumField::REnumField(std::string_view fieldName, std::string_view enumName)