public void TestSubsetIterator()
{
SubsetIterator <int> it = new SubsetIterator <int>(2, new List <int> {
1, 6, 7, 9
});
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 6
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
6, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
6, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
7, 9
}, it.Current);
Assert.IsFalse(it.MoveNext());
}
public void TestSubsetIteratorThatCrashed()
{
SubsetIterator <int> it = new SubsetIterator <int>(2, new List <int> {
1, 4, 7
});
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 4
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
4, 7
}, it.Current);
Assert.IsFalse(it.MoveNext());
}
public void TestBiggerSubsetIterator()
{
SubsetIterator <int> it = new SubsetIterator <int>(3, new List <int> {
1, 3, 4, 6, 7, 9
});
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 3, 4
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 3, 6
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 3, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 3, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 4, 6
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 4, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 4, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 6, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 6, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
1, 7, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
3, 4, 6
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
3, 4, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
3, 4, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
3, 6, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
3, 6, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
3, 7, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
4, 6, 7
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
4, 6, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
4, 7, 9
}, it.Current);
Assert.IsTrue(it.MoveNext());
AssertListEquality(new List <int> {
6, 7, 9
}, it.Current);
Assert.IsFalse(it.MoveNext());
}
protected bool SolveForCells(int groupSize, ref Board board, CellData cellData)
{
bool ruleSucceeded = false;
var unsolvedValues = cellData.GetUnsolvedValues();
var unsolvedCells = cellData.GetUnsolvedCells();
if (groupSize >= unsolvedCells.Count)
{
return(false);
}
var valueSetGenerator = new SubsetIterator <int>(groupSize, unsolvedValues);
while (valueSetGenerator.MoveNext())
{
List <int> setOfValues = valueSetGenerator.Current;
HashSet <KeyValuePair <int, List <int> > > cellsWithValues = new HashSet <KeyValuePair <int, List <int> > >();
foreach (int value in setOfValues)
{
cellsWithValues.AddRange(unsolvedCells.Where(kv => kv.Value.Contains(value)).ToList());
}
if (cellsWithValues.Count == groupSize)
{
foreach (KeyValuePair <int, List <int> > cell in cellsWithValues)
{
foreach (int value in unsolvedValues)
{
if (!setOfValues.Contains(value) && cell.Value.Contains(value))
{
board.RemoveValueFromCell(cell.Key, value);
ruleSucceeded = true;
}
}
}
}
}
var cellSetGenerator = new SubsetIterator <KeyValuePair <int, List <int> > >(groupSize, unsolvedCells.ToList());
while (cellSetGenerator.MoveNext())
{
List <KeyValuePair <int, List <int> > > setOfCells = cellSetGenerator.Current;
HashSet <int> valuesInCells = new HashSet <int>();
foreach (KeyValuePair <int, List <int> > cell in setOfCells)
{
valuesInCells.AddRange(cell.Value);
}
if (valuesInCells.Count == groupSize)
{
foreach (KeyValuePair <int, List <int> > cell in unsolvedCells)
{
if (!setOfCells.Select(c => c.Key).Contains(cell.Key))
{
foreach (int valueInCell in valuesInCells)
{
if (cell.Value.Contains(valueInCell))
{
board.RemoveValueFromCell(cell.Key, valueInCell);
ruleSucceeded = true;
}
}
}
}
}
}
return(ruleSucceeded);
}
public HashSet<GeneratorNode> spawn(FOForAll op)
{
HashSet<GeneratorNode> spawnedSet, outSet = new HashSet<GeneratorNode>();
Atom x = op.getQuantifiedVariable();
string qualifier = op.getQualifier();
// Iterate over domain
HashSet<Constant> oplus_domain = getOPlusDomain(qualifier);
HashSet<Constant> domain = op.getDomain();
SubsetIterator<Constant> it;
if (!m_encounteredQualifiers.Contains(qualifier))
{
// We haven't decomposed a For All in the past, so we can
// add elements to the message
it = new SubsetIterator<Constant>(domain, oplus_domain);
}
else
{
// Otherwise, we stick to the elements we already have to
// evaluate this quantifier
it = new SubsetIterator<Constant>(oplus_domain);
}
m_encounteredQualifiers.Add(op.getQualifier());
m_decomposedAForAll = true;
if (op.isPathNegation())
{
// The quantifier asserts the absence of a path
GeneratorNode wn = new GeneratorNode(this);
OPlus opl = new OPlus();
opl.setQualifier(op.getQualifier());
opl.setOperand(Operator.m_falseAtom);
if (!wn.addToOPluses(opl))
{
// We can't add this OPlus to the current set. Contradiction! Return the empty set
return new HashSet<GeneratorNode>();
}
return wn.spawn();
}
if (op.isPathAssertion())
{
// In negated form, the quantifier may assert the existence of a path
GeneratorNode wn = new GeneratorNode(this);
OPlus opl = new OPlus();
opl.setQualifier(op.getQualifier());
opl.setOperand(Operator.m_trueAtom);
if (!wn.addToOPluses(opl))
{
// We can't add this OPlus to the current set. Contradiction! Return the empty set
return new HashSet<GeneratorNode>();
}
return wn.spawn();
}
while (it.hasNext())
{
GeneratorNode wn = new GeneratorNode(this);
HashSet<Constant> subset = it.next();
foreach (Atom v in subset)
{
Operator o2 = op.getOperand();
Operator o3 = o2.evaluate(x, v);
OPlus opl = new OPlus(qualifier, v);
wn.addToGamma(o3);
if (!wn.addToOPluses(opl))
{
// Contradiction! Skip that branch
continue;
}
}
spawnedSet = wn.spawn();
if (spawnedSet != null)
{
foreach (GeneratorNode gn in spawnedSet)
{
outSet.Add(gn);
}
}
}
return outSet;
}
public HashSet<GeneratorNode> spawn(FOExists op)
{
HashSet<GeneratorNode> outSet = new HashSet<GeneratorNode>();
Atom x = op.getQuantifiedVariable();
string qualifier = op.getQualifier();
if (m_encounteredQualifiers.Contains(qualifier))
{
// We add something along a path where a ForAll has already
// been evaluated: soundness is no longer guaranteed for this node
m_sound = false;
}
if (op.isAnOPlus())
{
// This is an OPlus; return a node with op transferred to the OPlus set
GeneratorNode wn = new GeneratorNode(this);
if (!wn.addToOPluses(op.toOPlus()))
{
// We can't add this OPlus to the current set. Contradiction! Return the empty set
return new HashSet<GeneratorNode>();
}
return wn.spawn();
}
if (op.isPathAssertion())
{
GeneratorNode wn = new GeneratorNode();
OPlus opl = new OPlus();
opl.setQualifier(op.getQualifier());
opl.setOperand(Operator.m_trueAtom);
if (!wn.addToOPluses(opl))
{
// We can't add this OPlus to the current set. Contradiction! Return the empty set
return new HashSet<GeneratorNode>();
}
return wn.spawn();
}
// Iterate over domain
//HashSet<Constant> oplus_domain = getOPlusDomain(qualifier);
HashSet<Constant> domain = op.getDomain();
SubsetIterator<Constant> it = new SubsetIterator<Constant>(domain); //,oplus_domain
while (it.hasNext())
{
GeneratorNode wn = new GeneratorNode(this);
HashSet<Constant> subset = it.next();
foreach (Atom v in subset)
{
Operator o2 = op .getOperand();
Operator o3 = o2.evaluate(x, v);
if (!op.isPathAssertion())
{
wn.addToGamma(o3);
}
OPlus opl = new OPlus(qualifier, v);
if (!wn.addToOPluses(opl))
{
// We can't add this OPlus to the current set. Contradiction! Skip that branch
continue;
}
}
HashSet<GeneratorNode> spawnedSet = wn.spawn();
if (spawnedSet != null)
{
foreach (GeneratorNode gn in spawnedSet)
{
outSet.Add(gn);
}
}
}
return outSet;
}
