Changeset 6784 for branches/GP.Grammar.Editor/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeNode.cs

Timestamp:

09/16/11 12:00:36 (13 years ago)

Author:

mkommend

Message:

#1479: Integrated trunk changes.

File:

• branches/GP.Grammar.Editor/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeNode.cs (modified) (1 diff)

branches/GP.Grammar.Editor/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeNode.cs

@@ -55 +55 @@
       : base() {
       symbol = original.symbol; // symbols are reused
-      subtrees = new List<ISymbolicExpressionTreeNode>(original.subtrees.Count);
-      foreach (var subtree in original.subtrees) {
-        var clonedSubtree = cloner.Clone(subtree);
-        subtrees.Add(clonedSubtree);
-        clonedSubtree.Parent = this;
+      if (original.subtrees != null) {
+        subtrees = new List<ISymbolicExpressionTreeNode>(original.subtrees.Count);
+        foreach (var subtree in original.subtrees) {
+          var clonedSubtree = cloner.Clone(subtree);
+          subtrees.Add(clonedSubtree);
+          clonedSubtree.Parent = this;
+        }
       }
     }