public void Solve(int?[,] field)
{
ConstraintSystem S = ConstraintSystem.CreateSolver();
CspDomain Z = S.CreateIntegerInterval(1, 9);
CspTerm[][] sudoku = S.CreateVariableArray(Z, "cell", 9, 9);
for (int row = 0; row < 9; row++)
{
for (int col = 0; col < 9; col++)
{
if (field[row, col] > 0)
{
S.AddConstraints(S.Equal(field[row, col] ?? 0, sudoku[row][col]));
}
}
S.AddConstraints(S.Unequal(GetSlice(sudoku, row, row, 0, 8)));
}
for (int col = 0; col < 9; col++)
{
S.AddConstraints(S.Unequal(GetSlice(sudoku, 0, 8, col, col)));
}
for (int a = 0; a < 3; a++)
{
for (int b = 0; b < 3; b++)
{
S.AddConstraints(S.Unequal(GetSlice(sudoku, a * 3, a * 3 + 2, b * 3, b * 3 + 2)));
}
}
ConstraintSolverSolution soln = S.Solve();
if (!soln.HasFoundSolution)
{
throw new NoSolutionException("Для поставленной цифры нет решение!");
}
object[] h = new object[9];
for (int row = 0; row < 9; row++)
{
if ((row % 3) == 0)
{
System.Console.WriteLine();
}
for (int col = 0; col < 9; col++)
{
soln.TryGetValue(sudoku[row][col], out h[col]);
}
System.Console.WriteLine("{0}{1}{2} {3}{4}{5} {6}{7}{8}", h[0], h[1], h[2], h[3], h[4], h[5], h[6], h[7], h[8]);
}
}
static void Main(string[] args)
{
ConstraintSystem s1 = ConstraintSystem.CreateSolver();
// () and ()
CspTerm p1 = s1.CreateBoolean("p1");
CspTerm p2 = s1.CreateBoolean("p2");
CspTerm p3 = s1.CreateBoolean("p3");
CspTerm p4 = s1.CreateBoolean("p4");
var x = new CspDomain();
CspTerm test = s1.And(s1.Or(p1, s1.And(s1.Neg(p3)), s1.Neg(p1)), s1.And(p2, s1.Neg(s1.Difference(p1, p2))));
CspTerm tOr12 = s1.Or(s1.Neg(t1), s1.Neg(t2));
CspTerm tOr13 = s1.Or(s1.Neg(t1), s1.Neg(t3));
CspTerm tOr14 = s1.Or(s1.Neg(t1), s1.Neg(t4));
CspTerm tOr23 = s1.Or(s1.Neg(t2), s1.Neg(t3));
CspTerm tOr24 = s1.Or(s1.Neg(t2), s1.Neg(t4));
CspTerm tOr34 = s1.Or(s1.Neg(t3), s1.Neg(t4));
CspTerm tOr = s1.Or(t1, t2, t3, t4);
s1.AddConstraints(tOr12);
s1.AddConstraints(tOr13);
s1.AddConstraints(tOr14);
s1.AddConstraints(tOr23);
s1.AddConstraints(tOr24);
s1.AddConstraints(tOr34);
s1.AddConstraints(tOr);
ConstraintSolverSolution solution1 = s1.Solve();
if (solution1.HasFoundSolution)
{
Console.WriteLine("Is Satisfiable");
}
else
{
Console.WriteLine("Not satisfiable");
}
Console.ReadKey();
}
/// <summary>
/// Knapsack enumerator -- enumerate up to "numAnswers" combinations of "weights" such that the sum of the weights is less than the weight limit.
/// It places the patterns of items inside the list of patterns. The efficiency parameter ensures that we don't output any which use less than "efficiency" percent
/// off the weightlimit.
/// </summary>
/// <param name="maxAnswers">maximum number of combinations to get out. Limits runtime. If zero return all.</param>
/// <param name="weights">weight of each item to go into the knapsack</param>
/// <param name="weightLimit">knapsack weight limit</param>
/// <param name="efficiency">limit patterns to use at least this % of the weight limit (between 0.0 and 1.0) </param>
/// <param name="patterns">output list of patterns of inclusion of the weights.</param>
public static void SolveKnapsack(int maxAnswers, int[] weights, int weightLimit, double efficiency, out List <int[]> patterns)
{
// convenience value.
int NumItems = weights.Length;
ConstraintSystem solver = ConstraintSystem.CreateSolver();
CspDomain dom = solver.CreateIntegerInterval(0, weightLimit);
CspTerm knapsackSize = solver.Constant(weightLimit);
// these represent the quantity of each item.
CspTerm[] itemQty = solver.CreateVariableVector(dom, "Quantity", NumItems);
CspTerm[] itemWeights = new CspTerm[NumItems];
for (int cnt = 0; cnt < NumItems; cnt++)
{
itemWeights[cnt] = solver.Constant(weights[cnt]);
}
// contributors to the weight (weight * variable value)
CspTerm[] contributors = new CspTerm[NumItems];
for (int cnt = 0; cnt < NumItems; cnt++)
{
contributors[cnt] = itemWeights[cnt] * itemQty[cnt];
}
// single constraint
CspTerm knapSackCapacity = solver.GreaterEqual(knapsackSize, solver.Sum(contributors));
solver.AddConstraints(knapSackCapacity);
// must be efficient
CspTerm knapSackAtLeast = solver.LessEqual(knapsackSize * efficiency, solver.Sum(contributors));
solver.AddConstraints(knapSackAtLeast);
// start counter and allocate a list for the results.
int nanswers = 0;
patterns = new List <int[]>();
ConstraintSolverSolution sol = solver.Solve();
while (sol.HasFoundSolution)
{
int[] pattern = new int[NumItems];
// extract this pattern from the enumeration.
for (int cnt = 0; cnt < NumItems; cnt++)
{
object val;
sol.TryGetValue(itemQty[cnt], out val);
pattern[cnt] = (int)val;
}
// add it to the output.
patterns.Add(pattern);
nanswers++;
// stop if we reach the limit of results.
if (maxAnswers > 0 && nanswers >= maxAnswers)
{
break;
}
sol.GetNext();
}
}
// // Summary: // Check if this Domain and the other Domain have identical contents. public bool SetEqual(CspDomain otherDomain);
/// <summary>
/// Generates a constraint system based on a variability model. The constraint system can be used to check for satisfiability of configurations as well as optimization.
/// </summary>
/// <param name="variables">Empty input, outputs a list of CSP terms that correspond to the configuration options of the variability model</param>
/// <param name="optionToTerm">A map to get for a given configuration option the corresponding CSP term of the constraint system</param>
/// <param name="termToOption">A map that gives for a given CSP term the corresponding configuration option of the variability model</param>
/// <param name="vm">The variability model for which we generate a constraint system</param>
/// <returns>The generated constraint system consisting of logical terms representing configuration options as well as their boolean constraints.</returns>
internal static ConstraintSystem getConstraintSystem(out List <CspTerm> variables, out Dictionary <BinaryOption, CspTerm> optionToTerm, out Dictionary <CspTerm, BinaryOption> termToOption, VariabilityModel vm)
{
//Reusing seems to not work correctely. The problem: configurations are realized as additional constraints for the system.
//however, when checking for the next config, the old config's constraints remain in the solver such that we have a wrong result.
/*
* if (csystem != null && variables_global != null && optionToTerm_global != null && termToOption_global != null && vm != null)
* {//For optimization purpose
* if (vm.BinaryOptions.Count == vm_global.BinaryOptions.Count && vm.Name.Equals(vm_global.Name))
* {
* variables = variables_global;
* optionToTerm = optionToTerm_global;
* termToOption = termToOption_global;
* return csystem;
* }
* }*/
ConstraintSystem S = ConstraintSystem.CreateSolver();
optionToTerm = new Dictionary <BinaryOption, CspTerm>();
termToOption = new Dictionary <CspTerm, BinaryOption>();
variables = new List <CspTerm>();
foreach (BinaryOption binOpt in vm.BinaryOptions)
{
CspDomain domain = S.DefaultBoolean;
CspTerm temp = S.CreateVariable(domain, binOpt);
optionToTerm.Add(binOpt, temp);
termToOption.Add(temp, binOpt);
variables.Add(temp);
}
List <List <ConfigurationOption> > alreadyHandledAlternativeOptions = new List <List <ConfigurationOption> >();
//Constraints of a single configuration option
foreach (BinaryOption current in vm.BinaryOptions)
{
CspTerm cT = optionToTerm[current];
if (current.Parent == null || current.Parent == vm.Root)
{
if (current.Optional == false && current.Excluded_Options.Count == 0)
{
S.AddConstraints(S.Implies(S.True, cT));
}
else
{
S.AddConstraints(S.Implies(cT, optionToTerm[vm.Root]));
}
}
if (current.Parent != null && current.Parent != vm.Root)
{
CspTerm parent = optionToTerm[(BinaryOption)current.Parent];
S.AddConstraints(S.Implies(cT, parent));
if (current.Optional == false && current.Excluded_Options.Count == 0)
{
S.AddConstraints(S.Implies(parent, cT));//mandatory child relationship
}
}
//Alternative or other exclusion constraints
if (current.Excluded_Options.Count > 0)
{
List <ConfigurationOption> alternativeOptions = current.collectAlternativeOptions();
if (alternativeOptions.Count > 0)
{
//Check whether we handled this group of alternatives already
foreach (var alternativeGroup in alreadyHandledAlternativeOptions)
{
foreach (var alternative in alternativeGroup)
{
if (current == alternative)
{
goto handledAlternative;
}
}
}
//It is not allowed that an alternative group has no parent element
CspTerm parent = null;
if (current.Parent == null)
{
parent = S.True;
}
else
{
parent = optionToTerm[(BinaryOption)current.Parent];
}
CspTerm[] terms = new CspTerm[alternativeOptions.Count + 1];
terms[0] = cT;
int i = 1;
foreach (BinaryOption altEle in alternativeOptions)
{
CspTerm temp = optionToTerm[altEle];
terms[i] = temp;
i++;
}
S.AddConstraints(S.Implies(parent, S.ExactlyMofN(1, terms)));
alreadyHandledAlternativeOptions.Add(alternativeOptions);
handledAlternative : { }
}
//Excluded option(s) as cross-tree constraint(s)
List <List <ConfigurationOption> > nonAlternative = current.getNonAlternativeExlcudedOptions();
if (nonAlternative.Count > 0)
{
foreach (var excludedOption in nonAlternative)
{
CspTerm[] orTerm = new CspTerm[excludedOption.Count];
int i = 0;
foreach (var opt in excludedOption)
{
CspTerm target = optionToTerm[(BinaryOption)opt];
orTerm[i] = target;
i++;
}
S.AddConstraints(S.Implies(cT, S.Not(S.Or(orTerm))));
}
}
}
//Handle implies
if (current.Implied_Options.Count > 0)
{
foreach (List <ConfigurationOption> impliedOr in current.Implied_Options)
{
CspTerm[] orTerms = new CspTerm[impliedOr.Count];
//Possible error: if a binary option impies a numeric option
for (int i = 0; i < impliedOr.Count; i++)
{
orTerms[i] = optionToTerm[(BinaryOption)impliedOr.ElementAt(i)];
}
S.AddConstraints(S.Implies(optionToTerm[current], S.Or(orTerms)));
}
}
}
//Handle global cross-tree constraints involving multiple options at a time
// the constraints should be in conjunctive normal form
foreach (string constraint in vm.BinaryConstraints)
{
bool and = false;
string[] terms;
if (constraint.Contains("&"))
{
and = true;
terms = constraint.Split('&');
}
else
{
terms = constraint.Split('|');
}
CspTerm[] cspTerms = new CspTerm[terms.Count()];
int i = 0;
foreach (string t in terms)
{
string optName = t.Trim();
if (optName.StartsWith("-") || optName.StartsWith("!"))
{
optName = optName.Substring(1);
BinaryOption binOpt = vm.getBinaryOption(optName);
CspTerm cspElem = optionToTerm[binOpt];
CspTerm notCspElem = S.Not(cspElem);
cspTerms[i] = notCspElem;
}
else
{
BinaryOption binOpt = vm.getBinaryOption(optName);
CspTerm cspElem = optionToTerm[binOpt];
cspTerms[i] = cspElem;
}
i++;
}
if (and)
{
S.AddConstraints(S.And(cspTerms));
}
else
{
S.AddConstraints(S.Or(cspTerms));
}
}
csystem = S;
optionToTerm_global = optionToTerm;
vm_global = vm;
termToOption_global = termToOption;
variables_global = variables;
return(S);
}
public static void Run(int teamsNo)
{
// schedule N teams to play N-1 matches (one against every other team) with a difference
// of no more than 1 extra game away or home. Note that N must be even (since every team
// must be paired every week).
ConstraintSystem S = ConstraintSystem.CreateSolver();
// The teams are numbered 0 to N-1 for simplicity in index lookups,
// since our arrays are zero-based.
CspDomain Teams = S.CreateIntegerInterval(0, teamsNo - 1);
CspTerm[][] matches = S.CreateVariableArray(Teams, "opponents", teamsNo, teamsNo - 1);
CspTerm[][] atHome = S.CreateBooleanArray("atHome", teamsNo, teamsNo - 1);
// each row represents the N-1 games the teams play. The 0th week has an even-odd
// assignment since by symmetry that is equivalent to any other assignment and
// we thereby eliminate redundant solutions being enumerated.
for (int t = 0; t < teamsNo; t++)
{
CspTerm atHomeSum = S.Sum(atHome[t]);
S.AddConstraints(
S.Unequal(t, matches[t]), // don't play self, and play every other team
S.LessEqual(teamsNo / 2 - 1, atHomeSum, S.Constant(teamsNo / 2)), // a balance of atHomes
S.Equal(t ^ 1, matches[t][0]) // even-odd pairing in the initial round
);
}
for (int w = 0; w < teamsNo - 1; w++)
{
S.AddConstraints(
S.Unequal(GetColumn(matches, w)) // every team appears once each week
);
for (int t = 0; t < teamsNo; t++)
{
S.AddConstraints(
S.Equal(t, S.Index(matches, matches[t][w], w)), // Each team's pair's pair must be itself.
S.Equal(atHome[t][w], !S.Index(atHome, matches[t][w], w)) // Each pair is Home-Away or Away-Home.
);
}
}
// That's it! The problem is delivered to the solver.
// Now to get an answer...
//bool unsolved = true;
ConstraintSolverSolution soln = S.Solve();
if (soln.HasFoundSolution)
{
//unsolved = false;
Console.Write(" | ");
for (int w = 0; w < teamsNo - 1; w++)
{
Console.Write("{1}Wk{0,2}", w + 1, w == 0 ? "" : " | ");
}
Console.WriteLine();
Console.Write(" | ");
for (int w = 0; w < teamsNo - 1; w++)
{
Console.Write("{1}OP H", w + 1, w == 0 ? "" : " | ");
}
Console.WriteLine();
Console.WriteLine(" {0}", "|" + new String('-', teamsNo * 6));
for (int t = 0; t < teamsNo; t++)
{
StringBuilder line = new StringBuilder();
line.AppendFormat("Team {0,2}| ", t + 1);
for (int w = 0; w < teamsNo - 1; w++)
{
object opponent, home;
if (!soln.TryGetValue(matches[t][w], out opponent))
{
throw new InvalidProgramException(matches[t][w].Key.ToString());
}
if (!soln.TryGetValue(atHome[t][w], out home))
{
throw new InvalidProgramException(atHome[t][w].Key.ToString());
}
line.AppendFormat("{2}{0,2} {1}",
((int)opponent) + 1,
(int)home == 1 ? "*" : " ",
w == 0 ? "" : " | "
);
//line.Append(opponent.ToString());
//line.Append(((int)home == 1) ? " H," : " A,");
}
System.Console.WriteLine(line.ToString());
}
System.Console.WriteLine();
}
else
{
System.Console.WriteLine("No solution found.");
}
}
public ConstraintSolverSolution SolveB(int maxSolutions = 100)
{
ConstraintSystem S = ConstraintSystem.CreateSolver();
//Define how many agents may work per shift
CspDomain cspShiftsForceDomain = S.CreateIntegerInterval(first: 0, last: MaxAgents);
//Decision variables, one per shift, that will hold the result of how may agents must work per shift to fullfil requirements
CspTerm[] cspShiftsForce = S.CreateVariableVector(domain: cspShiftsForceDomain, key: "force", length: Shifts.Count);
//index shifts, their variable CspTerm by the shift's relative no (0=first, 1=second, etc)
ShiftsX = new Dictionary <Models.Shift, CspTerm>();
int i = 0;
Shifts.ForEach(x => { ShiftsX.Add(x, cspShiftsForce[i]); i++; });
//Constraint - Agents on every half hour must be >= requirement for that half hour
List <CspTerm> cspHalfHourExcess = new List <CspTerm>();
foreach (var halfHourRq in HalfHourRequirements)
{
//find shifts including that halftime, and calculate their sum of force
List <CspTerm> cspActive = new List <CspTerm>();
foreach (var entry in ShiftsX)
{
if (entry.Key.IncludesHalfHour(halfHourRq.Start))
{
cspActive.Add(entry.Value);
}
}
//add constraint for sum of force of active shifts on that halfhour
//if we need agents but no shifts exists for a halfhour, do not add a constraint
if (cspActive.Count > 0)
{
var s = S.Sum(cspActive.ToArray()) - S.Constant(halfHourRq.RequiredForce);
S.AddConstraints(
S.LessEqual(constant: 0, inputs: s)
);
cspHalfHourExcess.Add(s);
}
}
//var goal = S.Sum(shiftsX.Values.ToArray());
//bool ok = S.TryAddMinimizationGoals(goal);
var goalMinExcess = S.Sum(cspHalfHourExcess.ToArray());
bool ok = S.TryAddMinimizationGoals(goalMinExcess);
ConstraintSolverSolution solution = S.Solve();
Console.WriteLine();
GetSolutionsAll(solution: solution, maxSolutions: maxSolutions);
if (ShiftsForce == null || ShiftsForce.Count == 0)
{
Console.WriteLine("No solution found");
}
if (ShiftsForce != null)
{
foreach (var shiftForceEntry in ShiftsForce)
{
ShowSolution(no: shiftForceEntry.Key, shiftsForce: shiftForceEntry.Value, showAgents: true, showSlots: false);
}
}
return(solution);
}
public ConstraintSystem PrepareCspSolver()
{
ConstraintSystem S = ConstraintSystem.CreateSolver();
//Define how many agents may work per shift
var maxRq = HalfHourRequirements.Max(x => x.RequiredForce);
CspDomain cspShiftsForceDomain = S.CreateIntegerInterval(first: 0, last: maxRq);
//var cspShiftsForceDomain = S.CreateIntegerSet(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 });
//Decision variables, one per shift, that will hold the result of how may agents must work per shift to fullfil requirements
CspTerm[] cspShiftsForce = S.CreateVariableVector(domain: cspShiftsForceDomain, key: "force", length: Shifts.Count);
//index shifts, their variable CspTerm by the shift's relative no (0=first, 1=second, etc)
ShiftsX = new Dictionary <Models.Shift, CspTerm>();
int i = 0;
Shifts.ForEach(x => { ShiftsX.Add(x, cspShiftsForce[i]); i++; });
//Constraint - Agents from every active shift on every half hour must be >= requirement for that half hour
List <CspTerm> cspHalfHourExcess = new List <CspTerm>();
foreach (var halfHourRq in HalfHourRequirements)
{
//find shifts including that halftime, and calculate their sum of force
List <CspTerm> cspActive = new List <CspTerm>();
foreach (var entry in ShiftsX)
{
if (entry.Key.IncludesHalfHour(halfHourRq.Start))
{
cspActive.Add(entry.Value);
}
}
//add constraint for sum of force of active shifts on that halfhour
//if we need agents but no shifts exists for a halfhour, do not add a constraint
if (cspActive.Count > 0)
{
//var s = S.Sum(cspActive.ToArray()) - S.Constant(halfHourRq.RequiredForce);
S.AddConstraints(
S.LessEqual(constant: halfHourRq.RequiredForce, inputs: S.Sum(cspActive.ToArray()))
);
//cspHalfHourExcess.Add(s);
}
}
//if (false && cspHalfHourExcess.Count > 0)
// S.AddConstraints(
// S.LessEqual(constant: 0, inputs: S.Sum(cspHalfHourExcess.ToArray()))
// );
bool xx = true;
if (xx)
{
var goal = S.Sum(ShiftsX.Values.ToArray());
bool ok = S.TryAddMinimizationGoals(goal);
}
else
{
//S.RemoveAllMinimizationGoals();
var goalMinExcess = S.Sum(cspHalfHourExcess.ToArray());
bool ok = S.TryAddMinimizationGoals(goalMinExcess);
}
return(S);
}
/// <summary>
/// Generates a constraint system based on a variability model. The constraint system can be used to check for satisfiability of configurations as well as optimization.
/// </summary>
/// <param name="variables">Empty input, outputs a list of CSP terms that correspond to the configuration options of the variability model</param>
/// <param name="optionToTerm">A map to get for a given configuration option the corresponding CSP term of the constraint system</param>
/// <param name="termToOption">A map that gives for a given CSP term the corresponding configuration option of the variability model</param>
/// <param name="vm">The variability model for which we generate a constraint system</param>
/// <returns>The generated constraint system consisting of logical terms representing configuration options as well as their boolean constraints.</returns>
internal static ConstraintSystem GetGeneralConstraintSystem(out Dictionary <CspTerm, bool> variables, out Dictionary <ConfigurationOption, CspTerm> optionToTerm, out Dictionary <CspTerm, ConfigurationOption> termToOption, VariabilityModel vm)
{
ConstraintSystem S = ConstraintSystem.CreateSolver();
optionToTerm = new Dictionary <ConfigurationOption, CspTerm>();
termToOption = new Dictionary <CspTerm, ConfigurationOption>();
variables = new Dictionary <CspTerm, bool>();
foreach (ConfigurationOption o in vm.getOptions())
{
CspDomain binDomain = S.DefaultBoolean;
CspTerm temp;
if (o is BinaryOption)
{
temp = S.CreateVariable(binDomain, o);
}
else
{
NumericOption numOpt = (NumericOption)o;
temp = S.CreateVariable(S.CreateIntegerInterval((int)numOpt.Min_value, (int)numOpt.Max_value), o);
}
optionToTerm.Add(o, temp);
termToOption.Add(temp, o);
if (o is NumericOption)
{
variables.Add(temp, false);
}
else
{
variables.Add(temp, true);
}
}
List <List <ConfigurationOption> > alreadyHandledAlternativeOptions = new List <List <ConfigurationOption> >();
//Constraints of a single configuration option
foreach (ConfigurationOption current in vm.getOptions())
{
CspTerm cT = optionToTerm[current];
if (current.Parent == null || current.Parent == vm.Root)
{
if ((current is BinaryOption && ((BinaryOption)current).Optional == false && current.Excluded_Options.Count == 0))
{
S.AddConstraints(S.Implies(S.True, cT));
}
else
{
S.AddConstraints(S.Implies(cT, optionToTerm[vm.Root]));
}
}
if (current.Parent != null && current.Parent != vm.Root)
{
CspTerm parent = optionToTerm[(BinaryOption)current.Parent];
S.AddConstraints(S.Implies(cT, parent));
if (current is BinaryOption && ((BinaryOption)current).Optional == false && current.Excluded_Options.Count == 0)
{
S.AddConstraints(S.Implies(parent, cT));//mandatory child relationship
}
}
// Add numeric integer values
if (current is NumericOption)
{
NumericOption numOpt = (NumericOption)current;
List <double> values = numOpt.getAllValues();
List <CspTerm> equals = new List <CspTerm>();
foreach (double d in values)
{
equals.Add(S.Equal((int)d, cT));
}
S.AddConstraints(S.Or(equals.ToArray()));
}
//Alternative or other exclusion constraints
if (current.Excluded_Options.Count > 0 && current is BinaryOption)
{
BinaryOption binOpt = (BinaryOption)current;
List <ConfigurationOption> alternativeOptions = binOpt.collectAlternativeOptions();
if (alternativeOptions.Count > 0)
{
//Check whether we handled this group of alternatives already
foreach (var alternativeGroup in alreadyHandledAlternativeOptions)
{
foreach (var alternative in alternativeGroup)
{
if (current == alternative)
{
goto handledAlternative;
}
}
}
//It is not allowed that an alternative group has no parent element
CspTerm parent = null;
if (current.Parent == null)
{
parent = S.True;
}
else
{
parent = optionToTerm[(BinaryOption)current.Parent];
}
CspTerm[] terms = new CspTerm[alternativeOptions.Count + 1];
terms[0] = cT;
int i = 1;
foreach (BinaryOption altEle in alternativeOptions)
{
CspTerm temp = optionToTerm[altEle];
terms[i] = temp;
i++;
}
S.AddConstraints(S.Implies(parent, S.ExactlyMofN(1, terms)));
alreadyHandledAlternativeOptions.Add(alternativeOptions);
handledAlternative : { }
}
//Excluded option(s) as cross-tree constraint(s)
List <List <ConfigurationOption> > nonAlternative = binOpt.getNonAlternativeExlcudedOptions();
if (nonAlternative.Count > 0)
{
foreach (var excludedOption in nonAlternative)
{
CspTerm[] orTerm = new CspTerm[excludedOption.Count];
int i = 0;
foreach (var opt in excludedOption)
{
CspTerm target = optionToTerm[(BinaryOption)opt];
orTerm[i] = target;
i++;
}
S.AddConstraints(S.Implies(cT, S.Not(S.Or(orTerm))));
}
}
}
//Handle implies
if (current.Implied_Options.Count > 0)
{
foreach (List <ConfigurationOption> impliedOr in current.Implied_Options)
{
CspTerm[] orTerms = new CspTerm[impliedOr.Count];
//Possible error: if a binary option impies a numeric option
for (int i = 0; i < impliedOr.Count; i++)
{
orTerms[i] = optionToTerm[(BinaryOption)impliedOr.ElementAt(i)];
}
S.AddConstraints(S.Implies(optionToTerm[current], S.Or(orTerms)));
}
}
}
//Handle global cross-tree constraints involving multiple options at a time
// the constraints should be in conjunctive normal form
foreach (string constraint in vm.BinaryConstraints)
{
bool and = false;
string[] terms;
if (constraint.Contains("&"))
{
and = true;
terms = constraint.Split('&');
}
else
{
terms = constraint.Split('|');
}
CspTerm[] cspTerms = new CspTerm[terms.Count()];
int i = 0;
foreach (string t in terms)
{
string optName = t.Trim();
if (optName.StartsWith("-") || optName.StartsWith("!"))
{
optName = optName.Substring(1);
BinaryOption binOpt = vm.getBinaryOption(optName);
CspTerm cspElem = optionToTerm[binOpt];
CspTerm notCspElem = S.Not(cspElem);
cspTerms[i] = notCspElem;
}
else
{
BinaryOption binOpt = vm.getBinaryOption(optName);
CspTerm cspElem = optionToTerm[binOpt];
cspTerms[i] = cspElem;
}
i++;
}
if (and)
{
S.AddConstraints(S.And(cspTerms));
}
else
{
S.AddConstraints(S.Or(cspTerms));
}
}
return(S);
}