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

   1 // FieldToken.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 Field.
  35         /// </summary>
  36         [ComVisible (true)]
  37         [Serializable]
  38         public struct FieldToken {
  39
  40                 internal int tokValue;
  41
  42                 public static readonly FieldToken Empty;
  43
  44
  45                 static FieldToken ()
  46                 {
  47                         Empty = new FieldToken ();
  48                 }
  49
  50
  51                 internal FieldToken (int val)
  52                 {
  53                         tokValue = val;
  54                 }
  55
  56                 /// <summary>
  57                 /// </summary>
  58                 public override bool Equals (object obj)
  59                 {
  60                         bool res = obj is FieldToken;
  61
  62                         if (res) {
  63                                 FieldToken that = (FieldToken) obj;
  64                                 res = (this.tokValue == that.tokValue);
  65                         }
  66
  67                         return res;
  68                 }
  69
  70
  71                 public bool Equals (FieldToken obj)
  72                 {
  73                         return (this.tokValue == obj.tokValue);
  74                 }
  75
  76                 public static bool operator == (FieldToken a, FieldToken b)
  77                 {
  78                         return Equals (a, b);
  79                 }
  80
  81                 public static bool operator != (FieldToken a, FieldToken b)
  82                 {
  83                         return !Equals (a, b);
  84                 }
  85
  86                 /// <summary>
  87                 ///  Tests whether the given object is an instance of
  88                 ///  FieldToken and has the same token value.
  89                 /// </summary>
  90                 public override int GetHashCode ()
  91                 {
  92                         return tokValue;
  93                 }
  94
  95
  96                 /// <summary>
  97                 ///  Returns the metadata token for this Field.
  98                 /// </summary>
  99                 public int Token {
 100                         get {
 101                                 return tokValue;
 102                         }
 103                 }
 104
 105         }
 106
 107 }
 108