Fixed symbolic serialization

gtsam/symbolic/SymbolicBayesNet.h

@@ -71,6 +71,14 @@ namespace gtsam {
     void saveGraph(const std::string &s, const KeyFormatter& keyFormatter = DefaultKeyFormatter) const;
     
     /// @}
-  };
+
+  private:
+    /** Serialization function */
+    friend class boost::serialization::access;
+    template<class ARCHIVE>
+    void serialize(ARCHIVE & ar, const unsigned int version) {
+      ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base);
+    }
+};
 
 } // namespace gtsam

gtsam/symbolic/SymbolicBayesTree.h

@@ -60,6 +60,14 @@ namespace gtsam {
 
     /** check equality */
     bool equals(const This& other, double tol = 1e-9) const;
+
+  private:
+    /** Serialization function */
+    friend class boost::serialization::access;
+    template<class ARCHIVE>
+    void serialize(ARCHIVE & ar, const unsigned int version) {
+      ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base);
+    }
   };
 
 }

gtsam/symbolic/SymbolicConditional.h

@@ -98,7 +98,8 @@ namespace gtsam {
     friend class boost::serialization::access;
     template<class Archive>
     void serialize(Archive & ar, const unsigned int version) {
-      ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base);
+      ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(BaseFactor);
+      ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(BaseConditional);
     }
   };
 

gtsam/symbolic/SymbolicFactorGraph.h

@@ -106,6 +106,14 @@ namespace gtsam {
     void push_factor(Key key1, Key key2, Key key3, Key key4);
 
     /// @}
+
+  private:
+    /** Serialization function */
+    friend class boost::serialization::access;
+    template<class ARCHIVE>
+    void serialize(ARCHIVE & ar, const unsigned int version) {
+      ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base);
+    }
   };
 
 } // namespace gtsam