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//
// ProofOutcome.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 System.ComponentModel;
using Mono.CodeContracts.Static.Lattices;
namespace Mono.CodeContracts.Static {
static class ProofOutcome {
/// <summary>
/// Can be true or false.
/// </summary>
public static readonly FlatDomain<bool> Top = FlatDomain<bool>.TopValue;
/// <summary>
/// Unreachable.
/// </summary>
public static readonly FlatDomain<bool> Bottom = FlatDomain<bool>.BottomValue;
/// <summary>
/// Definitely true.
/// </summary>
public static readonly FlatDomain<bool> True = true;
/// <summary>
/// Definitely false.
/// </summary>
public static readonly FlatDomain<bool> False = false;
public static FlatDomain<bool> Negate(this FlatDomain<bool> o)
{
if (o.IsNormal())
return !o.IsTrue();
return o;
}
public static bool IsTrue(this FlatDomain<bool> o)
{
return o.IsNormal () && o.Value;
}
public static bool IsFalse(this FlatDomain<bool> o)
{
return o.IsNormal () && !o.Value;
}
}
}
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