89 lines
2.3 KiB
C#
89 lines
2.3 KiB
C#
// ----------------------------------------------------------------------------
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// Tuple structs for use in .NET Not-Quite-3.5 (e.g. Unity3D).
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//
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// Used Chapter 3 in http://functional-programming.net/ as a starting point.
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//
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// Note: .NET 4.0 Tuples are immutable classes so they're *slightly* different.
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// ----------------------------------------------------------------------------
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using System;
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/// <summary>
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/// Represents a functional tuple that can be used to store
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/// two values of different types inside one object.
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/// </summary>
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/// <typeparam name="T1">The type of the first element</typeparam>
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/// <typeparam name="T2">The type of the second element</typeparam>
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public sealed class Tuple<T1, T2> {
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private readonly T1 item1;
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private readonly T2 item2;
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/// <summary>
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/// Retyurns the first element of the tuple
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/// </summary>
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public T1 Item1{
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get{ return item1; }
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}
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/// <summary>
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/// Returns the second element of the tuple
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/// </summary>
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public T2 Item2{
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get{ return item2; }
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}
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/// <summary>
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/// Create a new tuple value
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/// </summary>
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/// <param name="item1">First element of the tuple</param>
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/// <param name="second">Second element of the tuple</param>
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public Tuple(T1 item1, T2 item2){
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this.item1 = item1;
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this.item2 = item2;
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}
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public override string ToString(){
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return string.Format("Tuple({0}, {1})", Item1, Item2);
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}
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public override int GetHashCode(){
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int hash = 17;
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hash = hash * 23 + (item1 == null ? 0 : item1.GetHashCode());
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hash = hash * 23 + (item2 == null ? 0 : item2.GetHashCode());
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return hash;
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}
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public override bool Equals(object o){
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if(!(o is Tuple<T1, T2>)){
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return false;
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}
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var other = (Tuple<T1, T2>)o;
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return this == other;
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}
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public bool Equals(Tuple<T1, T2> other){
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return this == other;
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}
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public static bool operator==(Tuple<T1, T2> a, Tuple<T1, T2> b){
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if(object.ReferenceEquals(a, null)){
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return object.ReferenceEquals(b, null);
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}else{
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if(object.ReferenceEquals(b, null)) return false;
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}
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if(a.item1 == null && b.item1 != null) return false;
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if(a.item2 == null && b.item2 != null) return false;
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return a.item1.Equals(b.item1) && a.item2.Equals(b.item2);
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}
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public static bool operator!=(Tuple<T1, T2> a, Tuple<T1, T2> b){
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return !(a == b);
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}
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public void Unpack(Action<T1, T2> unpackerDelegate){
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unpackerDelegate(Item1, Item2);
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}
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}
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