Changeset 1039

Timestamp:

12/19/08 12:11:04 (15 years ago)

Author:

gkronber

Message:

fixed #439 (One-Point Shaker does not work for terminals without parameters)

File:

• trunk/sources/HeuristicLab.GP/Manipulation/OnePointShaker.cs (modified) (1 diff)

trunk/sources/HeuristicLab.GP/Manipulation/OnePointShaker.cs

@@ -52 +52 @@
       // get all nodes for which a manipulation is defined
       var parametricBranches = gardener.GetAllSubTrees(tree).Where(branch => branch.Function.GetVariable(FunctionBase.MANIPULATION) != null);
+
+      if(parametricBranches.Count() == 0) return null; // don't manipulate anything if there are no nodes with a manipulation operator
+
       IFunctionTree selectedBranch = parametricBranches.ElementAt(mt.Next(parametricBranches.Count()));
       IOperator mutation = (IOperator)selectedBranch.Function.GetVariable(FunctionBase.MANIPULATION).Value;