mcs/class/Mono.CodeContracts/Mono.CodeContracts.Static.Analysis.ExpressionAnalysis.Decoding/QueryVisitor.cs

   1 //
   2 // QueryVisitor.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 using Mono.CodeContracts.Static.AST;
  31 using Mono.CodeContracts.Static.AST.Visitors;
  32 using Mono.CodeContracts.Static.DataStructures;
  33
  34 namespace Mono.CodeContracts.Static.Analysis.ExpressionAnalysis.Decoding {
  35         abstract class QueryVisitor<V, E> : ISymbolicExpressionVisitor<E, E, V, Dummy, bool>
  36         where V : IEquatable<V>
  37         where E : IEquatable<E>
  38     {
  39                 #region ISymbolicExpressionVisitor<E,E,V,Dummy,bool> Members
  40                 public virtual bool Binary (E pc, BinaryOperator op, V dest, E operand1, E operand2, Dummy data)
  41                 {
  42                         return false;
  43                 }
  44
  45                 public virtual bool Isinst (E pc, TypeNode type, V dest, E obj, Dummy data)
  46                 {
  47                         return false;
  48                 }
  49
  50                 public virtual bool LoadNull (E pc, V dest, Dummy polarity)
  51                 {
  52                         return false;
  53                 }
  54
  55                 public virtual bool LoadConst (E pc, TypeNode type, object constant, V dest, Dummy data)
  56                 {
  57                         return false;
  58                 }
  59
  60                 public virtual bool Sizeof (E pc, TypeNode type, V dest, Dummy data)
  61                 {
  62                         return false;
  63                 }
  64
  65                 public virtual bool Unary (E pc, UnaryOperator op, bool unsigned, V dest, E source, Dummy data)
  66                 {
  67                         return false;
  68                 }
  69
  70                 public virtual bool SymbolicConstant (E pc, V variable, Dummy data)
  71                 {
  72                         return false;
  73                 }
  74                 #endregion
  75
  76                 protected static bool Decode<Visitor> (E expr, Visitor visitor, FullExpressionDecoder<V,E> decoder)
  77                         where Visitor : QueryVisitor<V, E>
  78                 {
  79                         return decoder.ContextProvider.ExpressionContext.Decode<Dummy, bool, Visitor> (expr, visitor, Dummy.Value);
  80                 }
  81         }
  82 }