111 lines
3.1 KiB
C#
111 lines
3.1 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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/// <typeparam name="T3">The type of the third element</typeparam>
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/// <typeparam name="T4">The type of the fourth element</typeparam>
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public sealed class Tuple<T1, T2, T3, T4> {
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private readonly T1 item1;
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private readonly T2 item2;
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private readonly T3 item3;
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private readonly T4 item4;
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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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/// Returns the second element of the tuple
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/// </summary>
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public T3 Item3{
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get{ return item3; }
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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 T4 Item4{
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get{ return item4; }
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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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/// <param name="third">Third element of the tuple</param>
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/// <param name="fourth">Fourth element of the tuple</param>
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public Tuple(T1 item1, T2 item2, T3 item3, T4 item4){
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this.item1 = item1;
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this.item2 = item2;
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this.item3 = item3;
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this.item4 = item4;
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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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hash = hash * 23 + (item3 == null ? 0 : item3.GetHashCode());
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hash = hash * 23 + (item4 == null ? 0 : item4.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.GetType() != typeof(Tuple<T1, T2, T3, T4>)){
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return false;
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}
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var other = (Tuple<T1, T2, T3, T4>)o;
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return this == other;
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}
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public static bool operator==(Tuple<T1, T2, T3, T4> a, Tuple<T1, T2, T3, T4> 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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if(a.item3 == null && b.item3 != null) return false;
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if(a.item4 == null && b.item4 != null) return false;
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return
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a.item1.Equals(b.item1) &&
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a.item2.Equals(b.item2) &&
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a.item3.Equals(b.item3) &&
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a.item4.Equals(b.item4);
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}
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public static bool operator!=(Tuple<T1, T2, T3, T4> a, Tuple<T1, T2, T3, T4> b){
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return !(a == b);
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}
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public void Unpack(Action<T1, T2, T3, T4> unpackerDelegate){
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unpackerDelegate(Item1, Item2, Item3, Item4);
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}
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}
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