Example #1
0
 public SATVariable(Proposition proposition)
 {
     Proposition         = proposition;
     PositiveClauses     = new List <ushort>();
     NegativeClauses     = new List <ushort>();
     PredeterminedValue  = false;
     DeterminationStatus = DeterminationState.Floating;
 }
Example #2
0
 /// <summary>
 /// Creates a Literal representing the negation of the proposition
 /// </summary>
 /// <param name="p">Proposition to negate</param>
 public static Literal Not(Proposition p)
 {
     if (p.IsConstant)
     {
         return((bool)p ? Proposition.False : Proposition.True);
     }
     return(Problem.Current.Negation(p));
 }
Example #3
0
 /// <summary>
 /// Make a symmetric predicate
 /// This will enforce that predicate(a, b) == predicate(b, a)
 /// </summary>
 /// <typeparam name="T">Argument type</typeparam>
 /// <param name="name">Name of the predicate</param>
 /// <returns>The predicate object, i.e. a function from arguments to Propositions</returns>
 public static Func <T, T, Proposition> SymmetricPredicate <T>(string name) where T : IComparable
 {
     return((arg1, arg2) =>
     {
         if (arg1.CompareTo(arg2) > 0)
         {
             return Proposition.MakeProposition(Call.FromArgs(Problem.Current, name, arg2, arg1));
         }
         return Proposition.MakeProposition(Call.FromArgs(Problem.Current, name, arg1, arg2));
     });
 }
Example #4
0
 /// <summary>
 /// Make a symmetric, reflexive predicate
 /// This will enforce that predicate(a, b) == predicate(b, a)
 /// </summary>
 /// <typeparam name="T">Argument type</typeparam>
 /// <param name="name">Name of the predicate</param>
 /// <returns>The predicate object, i.e. a function from arguments to Propositions</returns>
 // ReSharper disable once UnusedMember.Global
 public static Func <T, T, Proposition> SymmetricTransitiveRelation <T>(string name) where T : IComparable
 {
     return((arg1, arg2) =>
     {
         var diff = arg1.CompareTo(arg2);
         if (diff > 0)
         {
             return Proposition.MakeProposition(Call.FromArgs(Problem.Current, name, arg2, arg1));
         }
         if (diff == 0)
         {
             return Proposition.True;
         }
         // diff < 0
         return Proposition.MakeProposition(Call.FromArgs(Problem.Current, name, arg1, arg2));
     });
 }
Example #5
0
 /// <summary>
 /// Creates a Literal representing the negation of the proposition
 /// </summary>
 /// <param name="proposition">Proposition to negate</param>
 public Negation(Proposition proposition)
 {
     this.Proposition = proposition;
 }
Example #6
0
 /// <summary>
 /// Test the truth of the specified literal within the model
 /// </summary>
 public bool this[Proposition p]
 {
     get => IsTrue(p);
Example #7
0
 /// <summary>
 /// Make a binary predicate
 /// </summary>
 /// <typeparam name="T1">Type for argument 1</typeparam>
 /// <typeparam name="T2">Type for argument 2</typeparam>
 /// <param name="name">Name of the predicate</param>
 /// <returns>The predicate object, i.e. a function from arguments to Propositions</returns>
 public static Func <T1, T2, Proposition> Predicate <T1, T2>(string name)
 {
     return((arg1, arg2) => Proposition.MakeProposition(Call.FromArgs(Problem.Current, name, arg1, arg2)));
 }
Example #8
0
 /// <summary>
 /// Make a 5-argument predicate
 /// </summary>
 /// <typeparam name="T1">Type for argument 1</typeparam>
 /// <typeparam name="T2">Type for argument 2</typeparam>
 /// <typeparam name="T3">Type for argument 3</typeparam>
 /// <typeparam name="T4">Type for argument 4</typeparam>
 /// <typeparam name="T5">Type for argument 5</typeparam>
 /// <param name="name">Name of the predicate</param>
 /// <returns>The predicate object, i.e. a function from arguments to Propositions</returns>
 // ReSharper disable once UnusedMember.Global
 public static Func <T1, T2, T3, T4, T5, Proposition> Predicate <T1, T2, T3, T4, T5>(string name)
 {
     return((arg1, arg2, arg3, arg4, arg5) => Proposition.MakeProposition(Call.FromArgs(Problem.Current, name, arg1, arg2, arg3, arg4, arg5)));
 }
 internal NonTightProblemException(Proposition offender) : base($"{offender} is inferrable from itself!")
 {
     Offender = offender;
 }