Add operators

gtsam/discrete/DiscreteBayesNet.h

@@ -83,6 +83,11 @@ namespace gtsam {
     //** evaluate for given DiscreteValues */
     double evaluate(const DiscreteValues & values) const;
 
+    //** (Preferred) sugar for the above for given DiscreteValues */
+    double operator()(const DiscreteValues & values) const {
+      return evaluate(values);
+    }
+
     /**
     * Solve the DiscreteBayesNet by back-substitution
     */

gtsam/discrete/DiscreteBayesTree.h

@@ -80,6 +80,12 @@ class GTSAM_EXPORT DiscreteBayesTree
 
   //** evaluate probability for given DiscreteValues */
   double evaluate(const DiscreteValues& values) const;
+
+  //** (Preferred) sugar for the above for given DiscreteValues */
+  double operator()(const DiscreteValues & values) const {
+    return evaluate(values);
+  }
+
 };
 
 }  // namespace gtsam