source: branches/Robocode.TrunkInt/HeuristicLab.Problems.Robocode/3.3/Symbols/Statements/IfThenElseStat.cs @ 10028

Last change on this file since 10028 was 10028, checked in by jkarder, 9 years ago

#2069:

  • merged IfStat and ElseStat into IfThenElseStat
  • changed the font of the suffixCode text box in the CodeNodeView
File size: 3.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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;
23using System.Collections.Generic;
24using HeuristicLab.Common;
25using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Problems.Robocode {
29  [StorableClass]
30  public class IfThenElseStat : CodeNode {
31    public override int MinimumArity { get { return 2; } }
32    public override int MaximumArity { get { return 3; } }
33
34    [Storable]
35    public override string Prefix { get; set; }
36
37    [Storable]
38    public override string Suffix { get; set; }
39
40    [StorableConstructor]
41    protected IfThenElseStat(bool deserializing) : base(deserializing) { }
42    protected IfThenElseStat(IfThenElseStat original, Cloner cloner) : base(original, cloner) { }
43
44    public IfThenElseStat() : base("IfThenElseStat", "An if statement.") { }
45
46    public override IDeepCloneable Clone(Cloner cloner) {
47      return new IfThenElseStat(this, cloner);
48    }
49
50    public override string Interpret(ISymbolicExpressionTreeNode node, IEnumerable<ISymbolicExpressionTreeNode> children) {
51      ISymbolicExpressionTreeNode condition = null, truePart = null, falsePart = null;
52      var enumerator = children.GetEnumerator();
53      int childCount = 0;
54      while (enumerator.MoveNext()) {
55        childCount++;
56        switch (childCount) {
57          case 1: condition = enumerator.Current; break;
58          case 2: truePart = enumerator.Current; break;
59          case 3: falsePart = enumerator.Current; break;
60          default: throw new ArgumentException("Unexpected number of children. Expected a maximum of 3 children.");
61        }
62      }
63      if (childCount < 2) throw new ArgumentException("Unexpected number of children. Expected at least 2 children.");
64
65      var parts = new[] {
66        ((CodeNode)condition.Symbol).Interpret(condition, condition.Subtrees),
67        ((CodeNode)truePart.Symbol).Interpret(truePart, truePart.Subtrees),
68        ((CodeNode)falsePart.Symbol).Interpret(falsePart, falsePart.Subtrees)
69      };
70
71      string result = "if (" + parts[0] + ") {" + parts[1] + "}";
72      if (!string.IsNullOrEmpty(parts[2]))
73        result += " else {" + result[2] + "}";
74      return result;
75    }
76  }
77}
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