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[14727] | 1 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Expressions {
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| 2 |
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| 3 | public abstract class StatefullExpression<T> : Expression {
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| 4 |
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| 5 | public readonly T State;
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| 6 |
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[14730] | 7 | private int hashCode;
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| 8 | private int HashCode {
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| 9 | get {
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| 10 | if (hashCode == default(int)) hashCode = CalcHashCode();
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| 11 | return hashCode;
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| 12 | }
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| 13 | }
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| 14 |
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[14727] | 15 | protected StatefullExpression(T state) {
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| 16 | this.State = state;
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| 17 | }
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| 18 |
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| 19 | protected virtual int CalcHashCode() {
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| 20 | return this.State.GetHashCode();
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| 21 | }
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| 22 |
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| 23 | public override bool Equals(object obj) {
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| 24 | if (ReferenceEquals(this, obj))
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| 25 | return true;
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| 26 |
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| 27 | if (this.GetType() != obj.GetType())
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| 28 | return false;
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| 29 |
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| 30 | var other = (StatefullExpression<T>)obj;
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| 31 |
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| 32 | return ReferenceEquals(this.State, other.State) ||
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| 33 | this.GetHashCode() == other.GetHashCode();
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| 34 | }
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| 35 |
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| 36 | public override int GetHashCode() {
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[14730] | 37 | return HashCode;
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[14727] | 38 | }
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| 39 | }
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| 40 | } |
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