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

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