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source: stable/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Grammars/ArithmeticExpressionGrammar.cs @ 13042

Last change on this file since 13042 was 12009, checked in by ascheibe, 10 years ago

#2212 updated copyright year

File size: 3.2 KB
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[3253]1#region License Information
2/* HeuristicLab
[12009]3 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
[3253]4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System.Collections.Generic;
[4722]23using HeuristicLab.Common;
[3253]24using HeuristicLab.Core;
[4068]25using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
[3253]26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
[6803]27using HeuristicLab.PluginInfrastructure;
[5574]28
[3373]29namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
[6803]30  [NonDiscoverableType]
[3253]31  [StorableClass]
[3294]32  [Item("ArithmeticExpressionGrammar", "Represents a grammar for functional expressions using only arithmetic operations.")]
[5686]33  public class ArithmeticExpressionGrammar : SymbolicExpressionGrammar, ISymbolicDataAnalysisGrammar {
[4722]34
35    [StorableConstructor]
36    protected ArithmeticExpressionGrammar(bool deserializing) : base(deserializing) { }
37    protected ArithmeticExpressionGrammar(ArithmeticExpressionGrammar original, Cloner cloner) : base(original, cloner) { }
[3294]38    public ArithmeticExpressionGrammar()
[5688]39      : base(ItemAttribute.GetName(typeof(ArithmeticExpressionGrammar)), ItemAttribute.GetDescription(typeof(ArithmeticExpressionGrammar))) {
[3294]40      Initialize();
[3253]41    }
[4722]42    public override IDeepCloneable Clone(Cloner cloner) {
43      return new ArithmeticExpressionGrammar(this, cloner);
44    }
[3253]45
[3294]46    private void Initialize() {
47      var add = new Addition();
48      var sub = new Subtraction();
49      var mul = new Multiplication();
50      var div = new Division();
51      var constant = new Constant();
[3442]52      constant.MinValue = -20;
53      constant.MaxValue = 20;
[5574]54      var variableSymbol = new HeuristicLab.Problems.DataAnalysis.Symbolic.Variable();
[3253]55
[3294]56      var allSymbols = new List<Symbol>() { add, sub, mul, div, constant, variableSymbol };
57      var functionSymbols = new List<Symbol>() { add, sub, mul, div };
[3373]58
[3338]59      foreach (var symb in allSymbols)
60        AddSymbol(symb);
[3253]61
[3338]62      foreach (var funSymb in functionSymbols) {
[5686]63        SetSubtreeCount(funSymb, 1, 3);
[3338]64      }
[5686]65      SetSubtreeCount(constant, 0, 0);
66      SetSubtreeCount(variableSymbol, 0, 0);
[3253]67
[3338]68      // allow each symbol as child of the start symbol
69      foreach (var symb in allSymbols) {
[5686]70        AddAllowedChildSymbol(StartSymbol, symb);
[5726]71        AddAllowedChildSymbol(DefunSymbol, symb);
[3338]72      }
73
74      // allow each symbol as child of every other symbol (except for terminals that have maxSubtreeCount == 0)
[5686]75      foreach (var parent in functionSymbols) {
76        foreach (var child in allSymbols)
77          AddAllowedChildSymbol(parent, child);
[3253]78      }
79    }
80  }
81}
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