72 lines
2.4 KiB
C#
72 lines
2.4 KiB
C#
//
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// ProofOutcome.cs
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//
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// Authors:
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// Alexander Chebaturkin (chebaturkin@gmail.com)
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//
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// Copyright (C) 2011 Alexander Chebaturkin
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel;
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using Mono.CodeContracts.Static.Lattices;
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namespace Mono.CodeContracts.Static {
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static class ProofOutcome {
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/// <summary>
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/// Can be true or false.
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/// </summary>
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public static readonly FlatDomain<bool> Top = FlatDomain<bool>.TopValue;
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/// <summary>
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/// Unreachable.
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/// </summary>
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public static readonly FlatDomain<bool> Bottom = FlatDomain<bool>.BottomValue;
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/// <summary>
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/// Definitely true.
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/// </summary>
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public static readonly FlatDomain<bool> True = true;
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/// <summary>
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/// Definitely false.
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/// </summary>
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public static readonly FlatDomain<bool> False = false;
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public static FlatDomain<bool> Negate(this FlatDomain<bool> o)
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{
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if (o.IsNormal())
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return !o.IsTrue();
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return o;
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}
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public static bool IsTrue(this FlatDomain<bool> o)
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{
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return o.IsNormal () && o.Value;
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}
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public static bool IsFalse(this FlatDomain<bool> o)
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{
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return o.IsNormal () && !o.Value;
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}
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}
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}
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