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//
// VisitorForValueOf.cs
//
// Authors:
// Alexander Chebaturkin (chebaturkin@gmail.com)
//
// Copyright (C) 2011 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.AST;
using Mono.CodeContracts.Static.DataStructures;
namespace Mono.CodeContracts.Static.Analysis.ExpressionAnalysis.Decoding {
class VisitorForValueOf<V, E> : QueryVisitor<V, E>
where V : IEquatable<V>
where E : IEquatable<E> {
private TypeNode Type;
private object Value;
public static bool IsConstant (E expr, out object value, out TypeNode type, FullExpressionDecoder<V, E> decoder)
{
VisitorForValueOf<V, E> v = decoder.ValueOfVisitor;
bool res = Decode (expr, v, decoder);
value = v.Value;
type = v.Type;
return res;
}
public override bool LoadNull (E pc, V dest, Dummy polarity)
{
this.Type = null;
this.Value = null;
return true;
}
public override bool LoadConst (E pc, TypeNode type, object constant, V dest, Dummy data)
{
this.Type = type;
this.Value = constant;
return true;
}
}
}
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