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//
// GetThresholdVisitor.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.Collections.Generic;
using Mono.CodeContracts.Static.DataStructures;
namespace Mono.CodeContracts.Static.Analysis.Numerical {
class GetThresholdVisitor<TVar, TExpr> : GenericExpressionVisitor<Dummy, bool, TVar, TExpr> {
public List<int> Thresholds { get; private set; }
public GetThresholdVisitor (IExpressionDecoder<TVar, TExpr> decoder) : base (decoder)
{
Thresholds = new List<int> ();
}
protected override bool Default (Dummy data)
{
return false;
}
public override bool VisitConstant (TExpr expr, Dummy data)
{
int value;
if (Decoder.IsConstantInt (expr, out value))
return false;
Thresholds.Add (value);
return true;
}
public override bool VisitLessThan (TExpr left, TExpr right, TExpr original, Dummy data)
{
return VisitBinary (left, right, data);
}
public override bool VisitLessEqualThan (TExpr left, TExpr right, TExpr original, Dummy data)
{
return VisitBinary (left, right, data);
}
public override bool VisitGreaterThan (TExpr left, TExpr right, TExpr original, Dummy data)
{
return VisitBinary (left, right, data);
}
public override bool VisitGreaterEqualThan (TExpr left, TExpr right, TExpr original, Dummy data)
{
return VisitBinary (left, right, data);
}
public override bool VisitNotEqual (TExpr left, TExpr right, TExpr original, Dummy data)
{
return VisitBinary (left, right, data);
}
public override bool VisitEqual (TExpr left, TExpr right, TExpr original, Dummy data)
{
return VisitBinary (left, right, data);
}
bool VisitBinary (TExpr left, TExpr right, Dummy data)
{
var gatheredFromLeft = Visit (left, data);
var gatheredFromRight = Visit (right, data);
return gatheredFromLeft || gatheredFromRight;
}
}
}
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