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//
// ConstantEvaluatorVisitor.cs
//
// Authors:
// Alexander Chebaturkin (chebaturkin@gmail.com)
//
// Copyright (C) 2012 Alexander Chebaturkin
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using Mono.CodeContracts.Static.DataStructures;
namespace Mono.CodeContracts.Static.Analysis.Numerical {
abstract class ConstantEvaluatorVisitor<In, Out> {
protected virtual bool Default (out Out result)
{
return false.Without (out result);
}
protected bool VisitBinary (ExpressionOperator o, In left, In right, out Out result)
{
try {
switch (o) {
case ExpressionOperator.And:
return VisitAnd (left, right, out result);
case ExpressionOperator.Or:
return VisitOr (left, right, out result);
case ExpressionOperator.Xor:
return VisitXor (left, right, out result);
case ExpressionOperator.LogicalAnd:
return VisitLogicalAnd (left, right, out result);
case ExpressionOperator.LogicalOr:
return VisitLogicalOr (left, right, out result);
case ExpressionOperator.Equal:
case ExpressionOperator.Equal_Obj:
return VisitEqual (left, right, out result);
case ExpressionOperator.NotEqual:
return VisitNotEqual (left, right, out result);
case ExpressionOperator.LessThan:
return VisitLessThan (left, right, out result);
case ExpressionOperator.LessEqualThan:
return VisitLessEqualThan (left, right, out result);
case ExpressionOperator.GreaterThan:
return VisitGreaterThan (left, right, out result);
case ExpressionOperator.GreaterEqualThan:
return VisitGreaterEqualThan (left, right, out result);
case ExpressionOperator.Add:
return VisitAdd (left, right, out result);
case ExpressionOperator.Sub:
return VisitSub (left, right, out result);
case ExpressionOperator.Mult:
return VisitMult (left, right, out result);
case ExpressionOperator.Div:
return VisitDiv (left, right, out result);
case ExpressionOperator.Mod:
return VisitMod (left, right, out result);
case ExpressionOperator.Unknown:
return VisitUnknown (left, out result);
}
throw new ArgumentOutOfRangeException ("not implemented");
}
catch (ArithmeticException) {
return false.Without (out result);
}
}
protected virtual bool VisitMod (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitDiv (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitMult (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitSub (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitGreaterEqualThan (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitGreaterThan (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitLessEqualThan (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitLessThan (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitNotEqual (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitEqual (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitLogicalOr (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitLogicalAnd (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitXor (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitOr (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitAnd (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitAdd (In left, In right, out Out result)
{
return Default (out result);
}
protected virtual bool VisitUnknown (In left, out Out result)
{
return Default (out result);
}
}
}
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