Changeset 15281 for branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding

branches/Async

Property svn:ignore

old	new
24	24	protoc.exe
25	25	obj
	26	.vs

Property svn:mergeinfo changed

/branches/symbreg-factors-2650 (added)	merged: 14232-14233,14237-14243,14248-14249,14251,14259,14266,14276-14277,14330-14331,14339,14351,14399,14401-14403,14421,14449,14497-14499,14501-14502,14534-14535,14539-14542,14554,14560,14589,14591-14592,14615,14693,14701,14715-14717,14719-14720,14751-14756,14758-14766,14812-14815,14823-14825
/stable	merged: 14190
/trunk/sources	merged: 14001,14007-14008,14011,14015-14017,14024-14026,14032,14034,14036-14037,14056-14057,14071,14078,14082-14083,14094-14096,14098-14100,14102-14103,14106-14107,14109-14110,14118,14120-14122,14124-14127,14129-14132,14135-14137,14140,14142,14144,14150,14152,14155-14160,14162-14164,14167-14169,14171,14174-14175,14177-14179,14181,14185,14187,14189,14191,14195-14196,14198,14200,14202-14209,14221-14224,14226-14230,14234-14236,14244-14247,14250,14255-14258,14260,14267-14268,14270-14273,14282,14284-14300,14307,14314-14316,14319,14322,14332,14340-14350,14352-14358,14367-14369,14371-14372,14376,14378,14381-14382,14384,14388,14390-14391,14393-14394,14396,14400,14405,14407-14408,14412,14418,14422-14423,14425,14432-14439,14443,14457-14458,14463-14465,14468-14469,14475-14476,14478-14479,14481-14483,14486,14493-14494,14504,14506-14509,14516-14517,14519,14522-14523,14527-14529,14531-14533,14548,14553,14561,14582,14597,14623,14630,14636-14638,14640-14641,14647,14651-14652,14654,14656,14659-14660,14662-14663,14672,14685,14687,14692,14697,14706,14708-14709,14718,14721-14722,14726,14732,14734,14737-14738,14740,14748-14750,14769-14770,14772-14775,14779-14781,14786,14789-14791,14793,14805,14809-14810,14817,14819-14820,14826-14832,14839-14843,14845-14847,14851-14854,14857,14860-14865,14871,14877,14882,14886,14889-14890,14899,14901,14904,14911-14912,14916,14918,14936-14938,14943-14951,14955,14971,14978-14979,14982,14984,14987,14992,14995,15002-15010,15013,15015-15016,15023-15024,15026,15029,15040,15042,15044,15046-15054,15058,15067-15077,15079-15080,15083-15088,15091-15096,15098-15099,15102-15107,15110-15114,15119-15126,15129,15135,15139,15156-15158,15160,15162-15169,15172-15173,15178-15181,15184-15185,15187,15191-15192,15194,15198,15201,15203,15205-15211,15213-15214,15221-15228,15230,15233-15236,15240-15241,15246-15248,15264-15266,15271,15276

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding

Property svn:mergeinfo changed

/branches/symbreg-factors-2650/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding (added)	merged: 14351,14399,14497,14499,14592
/stable/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding	merged: 14190
/trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding	merged: 14171,14181,14185,14195,14198,14221,14223-14224,14340,14342,14344,14352-14357,14826,15068

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Analyzers/BestSymbolicExpressionTreeAnalyzer.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Analyzers/MinAverageMaxSymbolicExpressionTreeLengthAnalyzer.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Analyzers/SymbolicExpressionSymbolFrequencyAnalyzer.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Analyzers/SymbolicExpressionTreeLengthAnalyzer.cs

-                      r12422
+                      r15281
 #region License Information
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
         treeLengthsTableRow.VisualProperties.ChartType = DataRowVisualProperties.DataRowChartType.Histogram;
         treeLengthsTableRow.VisualProperties.ExactBins = false;
+        treeLengthsTable.VisualProperties.HistogramExactBins = false;
         int range = maxLength - minLength;
         if (range == 0) range = 1;
         // the following trick should result in an integer intervalWidth of 1,2,4,...
         treeLengthsTableRow.VisualProperties.Bins = range;
+        treeLengthsTable.VisualProperties.HistogramBins = range;
         if (maxLength <= 25) // [0,25]

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Analyzers/SymbolicExpressionTreeLengthCalculator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/ArgumentCreater.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/ArgumentDeleter.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/ArgumentDuplicater.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/GrammarModifier.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/MultiSymbolicExpressionTreeArchitectureManipulator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/SubroutineCreater.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/SubroutineDeleter.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/SubroutineDuplicater.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/ArchitectureManipulators/SymbolicExpressionTreeArchitectureManipulator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Compiler/Instruction.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Compiler/LinearInstruction.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Compiler/SymbolicExpressionTreeCompiler.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Compiler/SymbolicExpressionTreeLinearCompiler.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Creators/FullTreeCreator.cs

r12844	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Creators/GrowTreeCreator.cs

r12844	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Creators/ProbabilisticTreeCreator.cs

r13227	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Creators/RampedHalfAndHalfTreeCreator.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Creators/SymbolicExpressionTreeCreator.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SubtreeCrossover.cs

-                      r12509
+                      r15281
 #region License Information
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
       int childLength = crossoverPoint0.Child != null ? crossoverPoint0.Child.GetLength() : 0;
       // calculate the max length and depth that the inserted branch can have
       int maxInsertedBranchLength = maxTreeLength - (parent0.Length - childLength);
       int maxInsertedBranchDepth = maxTreeDepth - parent0.Root.GetBranchLevel(crossoverPoint0.Parent);
+      int maxInsertedBranchLength = Math.Max(0, maxTreeLength - (parent0.Length - childLength));
+      int maxInsertedBranchDepth = Math.Max(0, maxTreeDepth - parent0.Root.GetBranchLevel(crossoverPoint0.Parent));
       List<ISymbolicExpressionTreeNode> allowedBranches = new List<ISymbolicExpressionTreeNode>();
 …
       } else {
         var selectedBranch = SelectRandomBranch(random, allowedBranches, internalCrossoverPointProbability);
+        if (selectedBranch != null)
+          selectedBranch = (ISymbolicExpressionTreeNode)selectedBranch.Clone();
         if (crossoverPoint0.Child != null) {

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SymbolicExpressionTreeCrossover.cs

r12480	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/CutPoint.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/EnumerableExtensions.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Formatters/SymbolicExpressionTreeGraphvizFormatter.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Formatters/SymbolicExpressionTreeHierarchicalFormatter.cs

r12012	r15281
2	2
3	3	/* HeuristicLab
4		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	4	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
5	5	*
6	6	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Formatters/SymbolicExpressionTreeStringFormatter.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Grammars/EmptySymbolicExpressionTreeGrammar.cs

r12422	r15281
2	2
3	3	/* HeuristicLab
4		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	4	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
5	5	*
6	6	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Grammars/SimpleSymbolicExpressionGrammar.cs

r15280	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Grammars/SymbolicExpressionGrammar.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Grammars/SymbolicExpressionGrammarBase.cs

-                      r12509
+                      r15281
 #region License Information
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
     protected SymbolicExpressionGrammarBase(bool deserializing)
       : base(deserializing) {
-      cachedMinExpressionLength = new Dictionary<string, int>();
-      cachedMaxExpressionLength = new Dictionary<Tuple<string, int>, int>();
-      cachedMinExpressionDepth = new Dictionary<string, int>();
-      cachedMaxExpressionDepth = new Dictionary<string, int>();
-      cachedIsAllowedChildSymbol = new Dictionary<Tuple<string, string>, bool>();
-      cachedIsAllowedChildSymbolIndex = new Dictionary<Tuple<string, string, int>, bool>();
       symbols = new Dictionary<string, ISymbol>();
 …
     protected SymbolicExpressionGrammarBase(SymbolicExpressionGrammarBase original, Cloner cloner)
       : base(original, cloner) {
-      cachedMinExpressionLength = new Dictionary<string, int>();
-      cachedMaxExpressionLength = new Dictionary<Tuple<string, int>, int>();
-      cachedMinExpressionDepth = new Dictionary<string, int>();
-      cachedMaxExpressionDepth = new Dictionary<string, int>();
-      cachedIsAllowedChildSymbol = new Dictionary<Tuple<string, string>, bool>();
-      cachedIsAllowedChildSymbolIndex = new Dictionary<Tuple<string, string, int>, bool>();
       symbols = original.symbols.ToDictionary(x => x.Key, y => cloner.Clone(y.Value));
 …
     protected SymbolicExpressionGrammarBase(string name, string description)
       : base(name, description) {
-      cachedMinExpressionLength = new Dictionary<string, int>();
-      cachedMaxExpressionLength = new Dictionary<Tuple<string, int>, int>();
-      cachedMinExpressionDepth = new Dictionary<string, int>();
-      cachedMaxExpressionDepth = new Dictionary<string, int>();
-      cachedIsAllowedChildSymbol = new Dictionary<Tuple<string, string>, bool>();
-      cachedIsAllowedChildSymbolIndex = new Dictionary<Tuple<string, string, int>, bool>();
       symbols = new Dictionary<string, ISymbol>();
       symbolSubtreeCount = new Dictionary<string, Tuple<int, int>>();
 …
+    }
     private readonly Dictionary<Tuple<string, string>, bool> cachedIsAllowedChildSymbol;
+    private readonly Dictionary<Tuple<string, string>, bool> cachedIsAllowedChildSymbol = new Dictionary<Tuple<string, string>, bool>();
     public virtual bool IsAllowedChildSymbol(ISymbol parent, ISymbol child) {
       if (allowedChildSymbols.Count == 0) return false;
 …
+    }
     private readonly Dictionary<Tuple<string, string, int>, bool> cachedIsAllowedChildSymbolIndex;
+    private readonly Dictionary<Tuple<string, string, int>, bool> cachedIsAllowedChildSymbolIndex = new Dictionary<Tuple<string, string, int>, bool>();
     public virtual bool IsAllowedChildSymbol(ISymbol parent, ISymbol child, int argumentIndex) {
       if (!child.Enabled) return false;
 …
+    }
     private readonly Dictionary<string, int> cachedMinExpressionLength;
+    private readonly Dictionary<string, int> cachedMinExpressionLength = new Dictionary<string, int>();
     public int GetMinimumExpressionLength(ISymbol symbol) {
       int res;
 …
         if (cachedMinExpressionLength.TryGetValue(symbol.Name, out res)) return res;
+        res = GetMinimumExpressionLengthRec(symbol);
+        foreach (var entry in cachedMinExpressionLength.Where(e => e.Value >= int.MaxValue).ToList()) {
+          if (entry.Key != symbol.Name) cachedMinExpressionLength.Remove(entry.Key);
+        }
+        return res;
+      }
+    }
+    private int GetMinimumExpressionLengthRec(ISymbol symbol) {
+      int temp;
+      if (!cachedMinExpressionLength.TryGetValue(symbol.Name, out temp)) {
+        cachedMinExpressionLength[symbol.Name] = int.MaxValue; // prevent infinite recursion
+        long sumOfMinExpressionLengths = 1 + (from argIndex in Enumerable.Range(0, GetMinimumSubtreeCount(symbol))
+                                              let minForSlot = (long)(from s in GetAllowedChildSymbols(symbol, argIndex)
+                                                                      where s.InitialFrequency > 0.0
+                                                                      select GetMinimumExpressionLengthRec(s)).DefaultIfEmpty(0).Min()
+                                              select minForSlot).DefaultIfEmpty(0).Sum();
+        cachedMinExpressionLength[symbol.Name] = (int)Math.Min(sumOfMinExpressionLengths, int.MaxValue);
+        GrammarUtils.CalculateMinimumExpressionLengths(this, cachedMinExpressionLength);
         return cachedMinExpressionLength[symbol.Name];
+      }
       return temp;
+    }
     private readonly Dictionary<Tuple<string, int>, int> cachedMaxExpressionLength;
+    }
+    private readonly Dictionary<Tuple<string, int>, int> cachedMaxExpressionLength = new Dictionary<Tuple<string, int>, int>();
     public int GetMaximumExpressionLength(ISymbol symbol, int maxDepth) {
       int temp;
 …
+    }
     private readonly Dictionary<string, int> cachedMinExpressionDepth;
+    private readonly Dictionary<string, int> cachedMinExpressionDepth = new Dictionary<string, int>();
     public int GetMinimumExpressionDepth(ISymbol symbol) {
       int res;
 …
         if (cachedMinExpressionDepth.TryGetValue(symbol.Name, out res)) return res;
+        res = GetMinimumExpressionDepthRec(symbol);
+        foreach (var entry in cachedMinExpressionDepth.Where(e => e.Value >= int.MaxValue).ToList()) {
+          if (entry.Key != symbol.Name) cachedMinExpressionDepth.Remove(entry.Key);
+        }
+        return res;
+      }
+    }
+    private int GetMinimumExpressionDepthRec(ISymbol symbol) {
+      int temp;
+      if (!cachedMinExpressionDepth.TryGetValue(symbol.Name, out temp)) {
+        cachedMinExpressionDepth[symbol.Name] = int.MaxValue; // prevent infinite recursion
+        long minDepth = 1 + (from argIndex in Enumerable.Range(0, GetMinimumSubtreeCount(symbol))
+                             let minForSlot = (long)(from s in GetAllowedChildSymbols(symbol, argIndex)
+                                                     where s.InitialFrequency > 0.0
+                                                     select GetMinimumExpressionDepthRec(s)).DefaultIfEmpty(0).Min()
+                             select minForSlot).DefaultIfEmpty(0).Max();
+        cachedMinExpressionDepth[symbol.Name] = (int)Math.Min(minDepth, int.MaxValue);
+        GrammarUtils.CalculateMinimumExpressionDepth(this, cachedMinExpressionDepth);
         return cachedMinExpressionDepth[symbol.Name];
+      }
+      return temp;
+    }
+    private readonly Dictionary<string, int> cachedMaxExpressionDepth;
+    }
+    private readonly Dictionary<string, int> cachedMaxExpressionDepth = new Dictionary<string, int>();
     public int GetMaximumExpressionDepth(ISymbol symbol) {
       int temp;

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Grammars/SymbolicExpressionTreeGrammar.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding-3.4.csproj

r12897	r15281
129	129	<Compile Include="ArchitectureManipulators\SubroutineDuplicater.cs" />
130	130	<Compile Include="ArchitectureManipulators\SymbolicExpressionTreeArchitectureManipulator.cs" />
	131	<Compile Include="Grammars\GrammarUtils.cs" />
131	132	<Compile Include="SymbolicExpressionTreeProblem.cs" />
132	133	<Compile Include="Compiler\Instruction.cs" />

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/IReadOnlySymbol.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/ISymbol.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/ISymbolicExpressionGrammar.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/ISymbolicExpressionGrammarBase.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/ISymbolicExpressionTree.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/ISymbolicExpressionTreeGrammar.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/ISymbolicExpressionTreeNode.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/ISymbolicExpressionTreeStringFormatter.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeAnalyzer.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeArchitectureAlteringOperator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeArchitectureManipulator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeCreator.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeCrossover.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeGrammarBasedOperator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeManipulator.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeOperator.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Interfaces/Operators/ISymbolicExpressionTreeSizeConstraintOperator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/ChangeNodeTypeManipulation.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/FullTreeShaker.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/MultiSymbolicExpressionTreeManipulator.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/OnePointShaker.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/RemoveBranchManipulation.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/ReplaceBranchManipulation.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Manipulators/SymbolicExpressionTreeManipulator.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Plugin.cs.frame

-                      r13321
+                      r15281
 #region License Information
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
 namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
   [Plugin("HeuristicLab.Encodings.SymbolicExpressionTreeEncoding","Provides operators and related classes for the symbolic expression tree encoding.", "3.4.9.$WCREV$")]
+  [Plugin("HeuristicLab.Encodings.SymbolicExpressionTreeEncoding","Provides operators and related classes for the symbolic expression tree encoding.", "3.4.10.$WCREV$")]
   [PluginFile("HeuristicLab.Encodings.SymbolicExpressionTreeEncoding-3.4.dll", PluginFileType.Assembly)]
   [PluginDependency("HeuristicLab.Analysis", "3.3")]

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Properties/AssemblyInfo.cs.frame

-                      r13321
+                      r15281
 #region License Information
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
 [assembly: AssemblyCompany("")]
 [assembly: AssemblyProduct("HeuristicLab")]
 [assembly: AssemblyCopyright("(c) 2002-2015 HEAL")]
+[assembly: AssemblyCopyright("(c) 2002-2016 HEAL")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 …
 [assembly: AssemblyVersion("3.4.0.0")]
 [assembly: AssemblyFileVersion("3.4.9.$WCREV$")]
+[assembly: AssemblyFileVersion("3.4.10.$WCREV$")]

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTree.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeEncoding.cs

-                      r15280
+                      r15281
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
     public SymbolicExpressionTreeEncoding(string name, ISymbolicExpressionGrammar grammar, int maximumLength, int maximumDepth)
       : base(name) {
       treeLengthParameter = new FixedValueParameter<IntValue>("Maximum Tree Length", "Maximal length of the symbolic expression.", new IntValue(maximumLength));
       treeDepthParameter = new FixedValueParameter<IntValue>("Maximum Tree Depth", "Maximal depth of the symbolic expression. The minimum depth needed for the algorithm is 3 because two levels are reserved for the ProgramRoot and the Start symbol.", new IntValue(maximumDepth));
       grammarParameter = new ValueParameter<ISymbolicExpressionGrammar>("Grammar", "The grammar that should be used for symbolic expression tree.", grammar);
       functionDefinitionsParameter = new FixedValueParameter<IntValue>("Function Definitions", "Maximal number of automatically defined functions", new IntValue(0));
       functionArgumentsParameter = new FixedValueParameter<IntValue>("Function Arguments", "Maximal number of arguments of automatically defined functions.", new IntValue(0));
+      treeLengthParameter = new FixedValueParameter<IntValue>(Name + ".Maximum Tree Length", "Maximal length of the symbolic expression.", new IntValue(maximumLength));
+      treeDepthParameter = new FixedValueParameter<IntValue>(Name + ".Maximum Tree Depth", "Maximal depth of the symbolic expression. The minimum depth needed for the algorithm is 3 because two levels are reserved for the ProgramRoot and the Start symbol.", new IntValue(maximumDepth));
+      grammarParameter = new ValueParameter<ISymbolicExpressionGrammar>(Name + ".Grammar", "The grammar that should be used for symbolic expression tree.", grammar);
+      functionDefinitionsParameter = new FixedValueParameter<IntValue>(Name + ".Function Definitions", "Maximal number of automatically defined functions", new IntValue(0));
+      functionArgumentsParameter = new FixedValueParameter<IntValue>(Name + ".Function Arguments", "Maximal number of arguments of automatically defined functions.", new IntValue(0));
       Parameters.Add(treeLengthParameter);

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeNode.cs

-                      r15280
+                      r15281
 #region License Information
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
+    }
     // parent relation is not persisted or cloned (will be set on AddSubtree or RemoveSubtree)
+    [Storable]
     private ISymbolicExpressionTreeNode parent;
     public ISymbolicExpressionTreeNode Parent {
 …
       if (subtrees != null) {
         foreach (var subtree in subtrees)
+          subtree.Parent = this;
+          if (subtree.Parent == null)
+            subtree.Parent = this;
+      }
+    }

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeOperator.cs

r12422	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeProblem.cs

r12921	r15281
2	2
3	3	/* HeuristicLab
4		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	4	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
5	5	*
6	6	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeTerminalNode.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/SymbolicExpressionTreeTopLevelNode.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/Argument.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/ArgumentTreeNode.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/Defun.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/DefunTreeNode.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/GroupSymbol.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/InvokeFunction.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/InvokeFunctionTreeNode.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/ProgramRootSymbol.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/SimpleSymbol.cs

-                      r12422
+                      r15281
 #region License Information
 /* HeuristicLab
  * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
  * This file is part of HeuristicLab.
 …
+    }
+    public SimpleSymbol(string name, int arity)
+      : this(name, string.Empty, arity, arity) {
+    }
     public SimpleSymbol(string name, string description, int minimumArity, int maximumArity)
       : base(name, description) {

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/StartSymbol.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

branches/Async/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/Symbol.cs

r12012	r15281
1	1	#region License Information
2	2	/* HeuristicLab
3		* Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
	3	* Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4	4	*
5	5	* This file is part of HeuristicLab.

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