class/corlib/System.Reflection.Emit/EventToken.cs

   1 // EventToken.cs
   2 //
   3 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   4
   5 //
   6 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining
   9 // a copy of this software and associated documentation files (the
  10 // "Software"), to deal in the Software without restriction, including
  11 // without limitation the rights to use, copy, modify, merge, publish,
  12 // distribute, sublicense, and/or sell copies of the Software, and to
  13 // permit persons to whom the Software is furnished to do so, subject to
  14 // the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be
  17 // included in all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 //
  27
  28 using System.Runtime.InteropServices;
  29
  30 namespace System.Reflection.Emit {
  31
  32
  33         /// <summary>
  34         ///  Represents the Token returned by the metadata to represent a Event.
  35         /// </summary>
  36         [ComVisible (true)]
  37         [Serializable]
  38         public struct EventToken {
  39
  40                 internal int tokValue;
  41
  42                 public static readonly EventToken Empty;
  43
  44
  45                 static EventToken ()
  46                 {
  47                         Empty = new EventToken ();
  48                 }
  49
  50
  51                 internal EventToken (int val)
  52                 {
  53                         tokValue = val;
  54                 }
  55
  56
  57
  58                 /// <summary>
  59                 /// </summary>
  60                 public override bool Equals (object obj)
  61                 {
  62                         bool res = obj is EventToken;
  63
  64                         if (res) {
  65                                 EventToken that = (EventToken) obj;
  66                                 res = (this.tokValue == that.tokValue);
  67                         }
  68
  69                         return res;
  70                 }
  71
  72                 public bool Equals (EventToken obj)
  73                 {
  74                         return (this.tokValue == obj.tokValue);
  75                 }
  76
  77                 public static bool operator == (EventToken a, EventToken b)
  78                 {
  79                         return Equals (a, b);
  80                 }
  81
  82                 public static bool operator != (EventToken a, EventToken b)
  83                 {
  84                         return !Equals (a, b);
  85                 }
  86
  87                 /// <summary>
  88                 ///  Tests whether the given object is an instance of
  89                 ///  EventToken and has the same token value.
  90                 /// </summary>
  91                 public override int GetHashCode ()
  92                 {
  93                         return tokValue;
  94                 }
  95
  96
  97                 /// <summary>
  98                 ///  Returns the metadata token for this Event.
  99                 /// </summary>
 100                 public int Token {
 101                         get {
 102                                 return tokValue;
 103                         }
 104                 }
 105
 106         }
 107
 108 }
 109