5 // Miguel de Icaza (miguel@ximian.com)
7 // (C) Ximian, Inc. http://www.ximian.com
12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
34 using System.Runtime.InteropServices;
35 using System.Runtime.CompilerServices;
36 using System.Runtime.ConstrainedExecution;
41 [ClassInterface (ClassInterfaceType.AutoDual)]
46 // Compares this object to the specified object.
47 // Returns true if they are equal, false otherwise.
49 public virtual bool Equals (object obj)
55 // Compares two objects for equality
57 public static bool Equals (object objA, object objB)
62 if (objA == null || objB == null)
65 return objA.Equals (objB);
69 // Initializes a new instance of the object class.
71 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
79 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
85 // Returns a hashcode for this object. Each derived
86 // class should return a hash code that makes sense
87 // for that particular implementation of the object.
89 public virtual int GetHashCode () {
90 return InternalGetHashCode (this);
94 // Returns the Type associated with the object.
96 [MethodImplAttribute(MethodImplOptions.InternalCall)]
97 public extern Type GetType ();
100 // Shallow copy of the object.
102 [MethodImplAttribute(MethodImplOptions.InternalCall)]
103 protected extern object MemberwiseClone ();
106 // Returns a stringified representation of the object.
107 // This is not supposed to be used for user presentation,
108 // use Format() for that and IFormattable.
110 // ToString is mostly used for debugging purposes.
112 public virtual string ToString ()
114 return GetType ().ToString ();
118 // Tests whether a is equal to b.
119 // Can not figure out why this even exists
121 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
122 public static bool ReferenceEquals (object objA, object objB)
124 return (objA == objB);
127 [MethodImplAttribute(MethodImplOptions.InternalCall)]
128 internal static extern int InternalGetHashCode (object o);
130 #pragma warning disable 169
131 void FieldGetter (string typeName, string fieldName, ref object val)
136 void FieldSetter (string typeName, string fieldName, object val)
140 #pragma warning restore 169