mcs/class/Mono.CodeContracts/Mono.CodeContracts.Static.Analysis.HeapAnalysis/SymbolicValue.cs

   1 //
   2 // SymbolicValue.cs
   3 //
   4 // Authors:
   5 //      Alexander Chebaturkin (chebaturkin@gmail.com)
   6 //
   7 // Copyright (C) 2011 Alexander Chebaturkin
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30
  31 namespace Mono.CodeContracts.Static.Analysis.HeapAnalysis {
  32         struct SymbolicValue : IEquatable<SymbolicValue>, IComparable<SymbolicValue>, IComparable {
  33                 public readonly SymValue Symbol;
  34
  35                 public SymbolicValue (SymValue symbol)
  36                 {
  37                         this.Symbol = symbol;
  38                 }
  39
  40                 public bool IsNull
  41                 {
  42                         get { return this.Symbol == null; }
  43                 }
  44
  45                 public int MethodLocalId
  46                 {
  47                         get { return this.Symbol.UniqueId; }
  48                 }
  49
  50                 #region Implementation of IEquatable<SymbolicValue>
  51                 public bool Equals (SymbolicValue other)
  52                 {
  53                         return this.Symbol == other.Symbol;
  54                 }
  55                 #endregion
  56
  57                 #region Implementation of IComparable<in SymbolicValue>
  58                 public int CompareTo (SymbolicValue other)
  59                 {
  60                         return this.Symbol.CompareTo (other.Symbol);
  61                 }
  62                 #endregion
  63
  64                 #region Implementation of IComparable
  65                 public int CompareTo (object obj)
  66                 {
  67                         if (!(obj is SymbolicValue))
  68                                 return 1;
  69
  70                         return CompareTo ((SymbolicValue) obj);
  71                 }
  72                 #endregion
  73
  74                 public override bool Equals (object obj)
  75                 {
  76                         if (obj is SymbolicValue)
  77                                 return Equals ((SymbolicValue) obj);
  78
  79                         return false;
  80                 }
  81
  82                 public override int GetHashCode ()
  83                 {
  84                         return this.Symbol == null ? 0 : this.Symbol.GetHashCode ();
  85                 }
  86
  87                 public override string ToString ()
  88                 {
  89                         if (this.Symbol == null)
  90                                 return "<!null!>";
  91                         return this.Symbol.ToString ();
  92                 }
  93
  94                 public static int GetUniqueKey (SymbolicValue arg)
  95                 {
  96                         return SymValue.GetUniqueKey (arg.Symbol);
  97                 }
  98         }
  99 }