class/System.ComponentModel.Composition/src/ComponentModel/System/Tuple.cs

   1 // -----------------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 // -----------------------------------------------------------------------
   4 #if !CLR40
   5 using System;
   6
   7 namespace System
   8 {
   9     // This is a very minimalistic implementation of Tuple'2 that allows us
  10     // to compile and work on versions of .Net eariler then 4.0.
  11     public struct Tuple<TItem1, TItem2>
  12     {
  13         public Tuple(TItem1 item1, TItem2 item2)
  14         {
  15             this = new Tuple<TItem1, TItem2>();
  16             this.Item1 = item1;
  17             this.Item2 = item2;
  18         }
  19
  20         public TItem1 Item1 { get; private set; }
  21         public TItem2 Item2 { get; private set; }
  22
  23         public override bool Equals(object obj)
  24         {
  25             if (obj is Tuple<TItem1, TItem2>)
  26             {
  27                 Tuple<TItem1, TItem2> that = (Tuple<TItem1, TItem2>)obj;
  28                 return object.Equals(this.Item1, that.Item1) && object.Equals(this.Item2, that.Item2);
  29             }
  30             else
  31             {
  32                 return false;
  33             }
  34         }
  35
  36         public override int GetHashCode()
  37         {
  38             return ((this.Item1 != null) ? this.Item1.GetHashCode() : 0) ^ ((this.Item2 != null) ? this.Item2.GetHashCode() : 0);
  39         }
  40
  41         public static bool operator ==(Tuple<TItem1, TItem2> left, Tuple<TItem1, TItem2> right)
  42         {
  43             return left.Equals(right);
  44         }
  45
  46         public static bool operator !=(Tuple<TItem1, TItem2> left, Tuple<TItem1, TItem2> right)
  47         {
  48             return !left.Equals(right);
  49         }
  50     }
  51 }
  52 #endif