unitTest for lambda6, alternative sequential execution, minor bugs

src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java

@@ -106,7 +106,7 @@ public class UnifyTypeFactory {
 	}
 	
 	public static UnifyType convert(GenericTypeVar t){
-		return new ReferenceType(t.get_Name());
+		return new PlaceholderType(t.get_Name());
 	}
 
 	public static UnifyConstraintsSet convert(ConstraintsSet constraints) {

src/de/dhbwstuttgart/typeinference/unify/TypeUnify.java

@@ -8,9 +8,17 @@ import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
 
 public class TypeUnify {
 	public Set<Set<UnifyPair>> unify(Set<UnifyPair> eq, IFiniteClosure fc) {
-		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc);
+		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc, true);
 		ForkJoinPool pool = new ForkJoinPool();
 		pool.invoke(unifyTask);
-		return unifyTask.join();
+		Set<Set<UnifyPair>> res =  unifyTask.join();
+		return res;
 	}
+	
+	public Set<Set<UnifyPair>> unifySequential(Set<UnifyPair> eq, IFiniteClosure fc) {
+		TypeUnifyTask unifyTask = new TypeUnifyTask(eq, fc, false);
+		Set<Set<UnifyPair>> res = unifyTask.compute();
+		return res;
+	}
+
 }

src/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java

@@ -54,14 +54,17 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>> {
 	
 	protected IFiniteClosure fc;
 	
-	public TypeUnifyTask(Set<UnifyPair> eq, IFiniteClosure fc) {
+	protected boolean parallel;
+	
+	public TypeUnifyTask(Set<UnifyPair> eq, IFiniteClosure fc, boolean parallel) {
 		this.eq = eq;
 		this.fc = fc;
+		this.parallel = parallel;
 	}
 
 	@Override
 	protected Set<Set<UnifyPair>> compute() {
-		return unify(eq, fc);
+		return unify(eq, fc, parallel);
 	}
 	
 	/**
@@ -70,7 +73,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>> {
 	 * @param fc The finite closure
 	 * @return The set of all principal type unifiers
 	 */
-	public Set<Set<UnifyPair>> unify(Set<UnifyPair> eq, IFiniteClosure fc) {		
+	protected Set<Set<UnifyPair>> unify(Set<UnifyPair> eq, IFiniteClosure fc, boolean parallel) {		
 		/*
 		 * Step 1: Repeated application of reduce, adapt, erase, swap 
 		 */
@@ -165,24 +168,35 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>> {
 			/*
 			 * Step 6 a) Restart (fork) for pairs where subst was applied
 			 */
+			if(parallel) {
 				if (eqPrime.equals(eq))
 					eqPrimePrimeSet.add(eqPrime);
 				else if(eqPrimePrime.isPresent()) {
-				TypeUnifyTask fork = new TypeUnifyTask(eqPrimePrime.get(), fc);
+					TypeUnifyTask fork = new TypeUnifyTask(eqPrimePrime.get(), fc, true);
 					forks.add(fork);
 					fork.fork();
 				}
 				else {
-				TypeUnifyTask fork = new TypeUnifyTask(eqPrime, fc);
+					TypeUnifyTask fork = new TypeUnifyTask(eqPrime, fc, true);
 					forks.add(fork);
 					fork.fork();
 				}
 			}
+			else { // sequentiell (Step 6b is included)
+				if (eqPrime.equals(eq))
+					eqPrimePrimeSet.add(eqPrime);
+				else if(eqPrimePrime.isPresent())
+					eqPrimePrimeSet.addAll(unify(eqPrimePrime.get(), fc, false));
+				else 
+					eqPrimePrimeSet.addAll(unify(eqPrime, fc, false));
+			}
+		}
 		
 		/*
 		 * 	Step 6 b) Build the union over everything.
 		 */
 		
+		if(parallel)
 			for(TypeUnifyTask fork : forks) 
 				eqPrimePrimeSet.addAll(fork.join());
 		

src/de/dhbwstuttgart/typeinference/unify/model/FiniteClosure.java

@@ -233,7 +233,7 @@ public class FiniteClosure implements IFiniteClosure {
 				Unifier sigma2 = sigma2Opt.get();
 				if(sigma2.size() == 0) // type.equals(theta2)
 					continue;
-				sigma2.swapPlaceholderSubstitutions(type.getTypeParams());
+				sigma2.swapPlaceholderSubstitutionsReverse(type.getTypeParams());
 				Set<UnifyType> theta1s = greater(theta2);
 				for (UnifyType theta1 : theta1s) {
 					// Because only the most general type is calculated, sigma1

src/de/dhbwstuttgart/typeinference/unify/model/Unifier.java

@@ -98,13 +98,30 @@ public class Unifier implements Function<UnifyType, UnifyType>, Iterable<Entry<P
 			if(!(tph instanceof PlaceholderType))
 				continue;
 			// Swap a substitutions (a -> b) if a is an element of the target params.
-			if(substitutions.containsKey(tph) && substitutions.get(tph) instanceof PlaceholderType) {
+			if(substitutions.containsKey(tph)) {		
+				if((substitutions.get(tph) instanceof PlaceholderType)) {
 					PlaceholderType newLhs = (PlaceholderType) substitutions.get(tph);
 					substitutions.remove(tph);
 					substitutions.put(newLhs, tph);
 				}
 			}
 		}
+	}
+	
+	public void swapPlaceholderSubstitutionsReverse(Iterable<UnifyType> sourceParams) {
+		for(UnifyType tph : sourceParams) {
+			if(!(tph instanceof PlaceholderType))
+				continue;
+			if(substitutions.containsValue(tph)) {
+				UnifyType key = substitutions.values().stream().filter(x -> x.equals(tph)).findAny().get();
+				if(key instanceof PlaceholderType) {
+					PlaceholderType newLhs = (PlaceholderType) tph;
+					substitutions.remove(key);
+					substitutions.put(newLhs, key);
+				}
+			}
+		}
+	}
 
 	@Override
 	public String toString() {

test/unify/UnifyTest.java

@@ -11,13 +11,14 @@ import org.junit.Test;
 import de.dhbwstuttgart.typeinference.unify.TypeUnify;
 import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
 import de.dhbwstuttgart.typeinference.unify.model.UnifyPair;
+import de.dhbwstuttgart.typeinference.unify.model.FunNType;
 import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
 import de.dhbwstuttgart.typeinference.unify.model.PlaceholderType;
 import de.dhbwstuttgart.typeinference.unify.model.UnifyType;
 import de.dhbwstuttgart.typeinference.unify.model.TypeParams;
 import junit.framework.Assert;
 
-public class UnifyTest extends TypeUnify{
+public class UnifyTest {
 	
 	/**
 	 * Testing the unification for cases with (n)one pair and without generics.
@@ -51,7 +52,7 @@ public class UnifyTest extends TypeUnify{
 		Set<UnifyPair> eq = new HashSet<UnifyPair>();
 		Set<Set<UnifyPair>> expected = new HashSet<>();
 		expected.add(new HashSet<>());
-		Set<Set<UnifyPair>> actual = unify(eq, fc);
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
 		Assert.assertEquals(expected, actual);
 		
 		/*
@@ -69,7 +70,7 @@ public class UnifyTest extends TypeUnify{
 		addAsSet(expected, new UnifyPair(tphA, integer, PairOperator.EQUALSDOT));
 		addAsSet(expected, new UnifyPair(tphA, doubl, PairOperator.EQUALSDOT));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 		
@@ -87,7 +88,7 @@ public class UnifyTest extends TypeUnify{
 		addAsSet(expected, new UnifyPair(tphA, number, PairOperator.EQUALSDOT));
 		addAsSet(expected, new UnifyPair(tphA, object, PairOperator.EQUALSDOT));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 		
@@ -104,7 +105,7 @@ public class UnifyTest extends TypeUnify{
 		expected = new HashSet<>();
 		addAsSet(expected, new UnifyPair(tphA, number, PairOperator.EQUALSDOT));
 
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 		
@@ -128,7 +129,7 @@ public class UnifyTest extends TypeUnify{
 		addAsSet(expected, new UnifyPair(tphA, supNumber, PairOperator.EQUALSDOT));
 		addAsSet(expected, new UnifyPair(tphA, supObject, PairOperator.EQUALSDOT));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		System.out.println("? super Integer");
 		System.out.println(actual);
 		actual = filterGeneratedTPHsMultiple(actual);
@@ -156,7 +157,7 @@ public class UnifyTest extends TypeUnify{
 		addAsSet(expected, new UnifyPair(tphA, supDouble, PairOperator.EQUALSDOT));
 		addAsSet(expected, new UnifyPair(tphA, supNumber, PairOperator.EQUALSDOT));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		actual = filterGeneratedTPHsMultiple(actual);
 		
 		Assert.assertEquals(expected, actual);
@@ -174,7 +175,7 @@ public class UnifyTest extends TypeUnify{
 		addAsSet(expected, new UnifyPair(tphA, extNumber, PairOperator.EQUALSDOT));
 		addAsSet(expected, new UnifyPair(tphA, extObject, PairOperator.EQUALSDOT));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		actual = filterGeneratedTPHsMultiple(actual);
 		Assert.assertEquals(expected, actual);
 		
@@ -199,7 +200,7 @@ public class UnifyTest extends TypeUnify{
 		addAsSet(expected, new UnifyPair(tphA, integer, PairOperator.EQUALSDOT));
 		addAsSet(expected, new UnifyPair(tphA, number, PairOperator.EQUALSDOT));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		actual = filterGeneratedTPHsMultiple(actual);
 		
 		Assert.assertEquals(expected, actual);
@@ -216,7 +217,7 @@ public class UnifyTest extends TypeUnify{
 		expected = new HashSet<>();
 		expected.add(new HashSet<>());
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 		
@@ -231,7 +232,7 @@ public class UnifyTest extends TypeUnify{
 		
 		expected = new HashSet<>();
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 		
@@ -248,7 +249,7 @@ public class UnifyTest extends TypeUnify{
 		expected = new HashSet<>();
 		addAsSet(expected, new UnifyPair(tphA, tphB, PairOperator.SMALLERDOT));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 		
@@ -264,7 +265,7 @@ public class UnifyTest extends TypeUnify{
 		expected = new HashSet<>();
 		addAsSet(expected, new UnifyPair(tphA, tphB, PairOperator.SMALLERDOTWC));
 		
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 		
@@ -286,7 +287,7 @@ public class UnifyTest extends TypeUnify{
 		
 		IFiniteClosure voidFC = fcb.getFiniteClosure();
 		
-		actual = unify(eq, voidFC);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		Assert.assertEquals(expected, actual);
 	}
@@ -331,7 +332,7 @@ public class UnifyTest extends TypeUnify{
 		eq.add(new UnifyPair(tf.getSimpleType("List", tphB), tf.getSimpleType("List", extNum), PairOperator.SMALLERDOT));
 		
 		Set<Set<UnifyPair>> expected = new HashSet<>();
-		Set<Set<UnifyPair>> actual = unify(eq, fc);
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
 		
 		//System.out.println(actual);
 		//Assert.assertEquals(actual, expected);
@@ -350,7 +351,7 @@ public class UnifyTest extends TypeUnify{
 		eq.add(new UnifyPair(tf.getSimpleType("Vector", extA), tf.getSimpleType("Vector", extNum), PairOperator.SMALLERDOT));
 
 		expected = new HashSet<>();
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		//System.out.println(actual);
 		//Assert.assertEquals(actual, expected);
@@ -366,7 +367,7 @@ public class UnifyTest extends TypeUnify{
 		eq.add(new UnifyPair(tf.getSimpleType("Vector", extNum), tf.getSimpleType("Vector", extA), PairOperator.SMALLERDOT));
 
 		expected = new HashSet<>();
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 
 		System.out.println(actual);
 		//Assert.assertEquals(actual, expected);
@@ -387,7 +388,7 @@ public class UnifyTest extends TypeUnify{
 		eq.add(new UnifyPair(extNum, tphB, PairOperator.SMALLERDOTWC));
 		
 		expected = new HashSet<>();
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		//System.out.println(actual);
 		//Assert.assertEquals(actual, expected);
@@ -449,7 +450,7 @@ public class UnifyTest extends TypeUnify{
 		eq.add(new UnifyPair(tf.getSimpleType("List", integer), tf.getSimpleType("List", tphB), PairOperator.SMALLERDOT));
 		
 		Set<Set<UnifyPair>> expected = new HashSet<>();
-		Set<Set<UnifyPair>> actual = unify(eq, fc);
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println(actual);
 		//Assert.assertEquals(actual, expected);
@@ -469,7 +470,7 @@ public class UnifyTest extends TypeUnify{
 		
 		expected = new HashSet<>();
 
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println("Case 2");
 		System.out.println(actual);
@@ -489,7 +490,7 @@ public class UnifyTest extends TypeUnify{
 		
 		expected = new HashSet<>();
 
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		
 		System.out.println("Case 3");
@@ -514,7 +515,7 @@ public class UnifyTest extends TypeUnify{
 		
 		expected = new HashSet<>();
 
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println(actual);
 		//Assert.assertEquals(expected, actual);
@@ -533,7 +534,7 @@ public class UnifyTest extends TypeUnify{
 		
 		expected = new HashSet<>();
 
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println(actual);
 		//Assert.assertEquals(expected, actual);
@@ -552,7 +553,7 @@ public class UnifyTest extends TypeUnify{
 		
 		expected = new HashSet<>();
 
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println("Case 7");
 		System.out.println(actual);
@@ -573,7 +574,7 @@ public class UnifyTest extends TypeUnify{
 		
 		expected = new HashSet<>();
 
-		actual = unify(eq, fc);
+		actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println("Case 8:");
 		System.out.println(actual);
@@ -608,7 +609,7 @@ public class UnifyTest extends TypeUnify{
 		eq.add(new UnifyPair(tf.getSimpleType("Matrix"), tf.getSimpleType("Vector", tf.getPlaceholderType("a")), PairOperator.SMALLERDOT));
 
 		Set<Set<UnifyPair>> expected = new HashSet<>();
-		Set<Set<UnifyPair>> actual = unify(eq, fc);
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println("Test Matrix:");
 		System.out.println(actual);
@@ -675,7 +676,7 @@ public class UnifyTest extends TypeUnify{
 		expected.add(solution);
 		
 		
-		Set<Set<UnifyPair>> actual = unify(eq, fc);
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println("Test Void:");
 		System.out.println(actual);
@@ -683,6 +684,172 @@ public class UnifyTest extends TypeUnify{
 		Assert.assertEquals(expected, actual);
 	}
 
+//	@Test
+//	public void unifyTestMatrixSimple() {
+////		[(C <. C), 
+////		 (D <. D), 
+////		 (java.lang.Boolean <. PC), 
+////		 (java.lang.Integer <. E1), 
+////		 (java.util.Vector<java.lang.Integer> <. java.util.Vector<E1>), 
+////		 (java.lang.Integer <. PD), 
+////		 (java.util.Vector<java.lang.Integer> <. java.util.Vector<E3>), 
+////		 (PE <. java.lang.Boolean), 
+////		 (C <. java.lang.Integer),
+////		 (PD <. java.lang.Integer), 
+////		 (PE <. java.lang.Boolean), 
+////		 (E2 <. PF), 
+////		 (C <. java.lang.Integer), 
+////		 (java.util.Vector<java.lang.Integer> <. java.util.Vector<E2>), 
+////		 (PG <. java.lang.Double),
+////		 (java.lang.Integer <. java.lang.Double),
+////		 (PF <. java.lang.Double),
+////		 (PG <. D),
+////		 (D <. PH),
+////		 (void <. B),
+////		 (void <. PI),
+////		 (Matrix <. java.util.Vector<E4>), 
+////		 (void <. void)] 
+//		
+//		TypeFactory tf = new TypeFactory();
+//		FiniteClosureBuilder fcb = new FiniteClosureBuilder();
+//
+//		UnifyType tphC = tf.getPlaceholderType("C");
+//		UnifyType tphD = tf.getPlaceholderType("D");
+//		UnifyType tphPC = tf.getPlaceholderType("PC");
+//		UnifyType tphE1 = tf.getPlaceholderType("E1");
+//		UnifyType tphPD = tf.getPlaceholderType("PD");
+//		UnifyType tphE3 = tf.getPlaceholderType("E3");
+//		UnifyType tphPE = tf.getPlaceholderType("PE");
+//		UnifyType tphE2 = tf.getPlaceholderType("E2");
+//		UnifyType tphPG = tf.getPlaceholderType("PG");
+//		UnifyType tphPF = tf.getPlaceholderType("PF");
+//		UnifyType tphPH = tf.getPlaceholderType("PH");	
+//		UnifyType tphPI = tf.getPlaceholderType("PI");	
+//		UnifyType tphE4 = tf.getPlaceholderType("E4");
+//		UnifyType tphB = tf.getPlaceholderType("B");
+//		
+//		UnifyType integer = tf.getSimpleType("java.lang.Integer");
+//		UnifyType voidType = tf.getSimpleType("void");
+//		UnifyType bool = tf.getSimpleType("java.lang.Boolean");
+//		UnifyType object = tf.getSimpleType("java.lang.Object");
+//		UnifyType doubl = tf.getSimpleType("java.lang.Double");
+//		UnifyType number = tf.getSimpleType("java.lang.Number");
+//		
+//		fcb.add(integer, number);
+//		fcb.add(bool, object);
+//		fcb.add(doubl, number);
+//		fcb.add(number, object);
+//		fcb.add(voidType, voidType);
+//		
+//		IFiniteClosure fc = fcb.getFiniteClosure();
+//		
+//		Set<UnifyPair> eq = new HashSet<UnifyPair>();
+//		eq.add(new UnifyPair(tphC, tphC, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphD, tphD, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(bool, tphPC, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(integer, tphE1, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tf.getSimpleType("Vector", integer), tf.getSimpleType("Vector", tphE1), PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(integer, tphPD, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tf.getSimpleType("Vector", integer), tf.getSimpleType("Vector", tphE3), PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphPE, bool, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphC, integer, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphPD, integer, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphPE, bool, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphE2, tphPF, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphC, integer, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tf.getSimpleType("Vector", integer), tf.getSimpleType("Vector", tphE2), PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphPG, doubl, PairOperator.SMALLERDOT));
+//		//eq.add(new UnifyPair(integer, doubl, PairOperator.SMALLERDOT)); KEIN WUNDER INFERIERT DAS NICHT
+//		eq.add(new UnifyPair(tphPF, doubl, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphPG, tphD, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tphD, tphPH, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(voidType, tphB, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(voidType, tphPI, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(tf.getSimpleType("Matrix"), tphPI, PairOperator.SMALLERDOT));
+//		eq.add(new UnifyPair(voidType, tphPI, PairOperator.SMALLERDOT));
+//
+//		Set<Set<UnifyPair>> expected = new HashSet<>();
+//		
+//		Set<Set<UnifyPair>> actual = unify(eq, fc);
+//		
+//		System.out.println("Test Void:");
+//		System.out.println(actual);
+//		
+//		//Assert.assertEquals(expected, actual);
+//	}
+	
+	@Test
+	public void unifyTestLambda6() {
+//		[(D <. D),
+//		 (R455538610 <. ND),
+//		 (Matrix <. T1455538610),
+//		 (C <. T2455538610),
+//		 (B <. Fun2<R455538610,T1455538610,T2455538610>),
+//		 (ND <. NE),
+//		 (Fun1<? extends NE,? super B> <. NC),
+//		 (NC <. NF),
+//		 (Fun1<? extends NF,? super C> <. NB),
+//		 (NB <. D),
+//		 (void <. NG),
+//		 (Matrix <. java.lang.Object),
+//		 (void <. void)]
+		
+		TypeFactory tf = new TypeFactory();
+		FiniteClosureBuilder fcb = new FiniteClosureBuilder();
+
+		UnifyType tphD = tf.getPlaceholderType("D");
+		UnifyType tphND = tf.getPlaceholderType("ND");
+		UnifyType tphR4 = tf.getPlaceholderType("R4");
+		UnifyType tphT1 = tf.getPlaceholderType("T1");
+		UnifyType tphT2 = tf.getPlaceholderType("T2");
+		UnifyType tphC = tf.getPlaceholderType("C");
+		UnifyType tphNE = tf.getPlaceholderType("NE");
+		UnifyType tphNC = tf.getPlaceholderType("NC");
+		UnifyType tphB = tf.getPlaceholderType("B");
+		UnifyType tphNF = tf.getPlaceholderType("NF");
+		UnifyType tphNB = tf.getPlaceholderType("NB");
+		UnifyType tphNG = tf.getPlaceholderType("NG");	
+		
+		UnifyType voidType = tf.getSimpleType("void");
+		UnifyType object = tf.getSimpleType("java.lang.Object");
+		UnifyType matrix = tf.getSimpleType("java.lang.Matrix");
+		
+		UnifyType r = tf.getPlaceholderType("R");
+		UnifyType t1 = tf.getPlaceholderType("T1");
+		UnifyType t2 = tf.getPlaceholderType("T2");
+		UnifyType fun1 = FunNType.getFunNType(new TypeParams(r, t1));
+		UnifyType fun2 = FunNType.getFunNType(new TypeParams(r, t1, t2));
+
+		fcb.add(matrix, object);
+		fcb.add(voidType, voidType);
+		
+		IFiniteClosure fc = fcb.getFiniteClosure();
+		
+		Set<UnifyPair> eq = new HashSet<UnifyPair>();
+		eq.add(new UnifyPair(tphD, tphD, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(tphR4, tphND, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(matrix, tphT1, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(tphC, tphT2, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(tphB, FunNType.getFunNType(new TypeParams(tphR4, tphT1, tphT2)), PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(tphND, tphNE, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(FunNType.getFunNType(new TypeParams(tphNE, tphB)), tphNC, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(tphNC, tphNF, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(FunNType.getFunNType(new TypeParams(tphNF, tphC)), tphNB, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(tphNB, tphD, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(voidType, tphNG, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(matrix, object, PairOperator.SMALLERDOT));
+		eq.add(new UnifyPair(voidType, voidType, PairOperator.SMALLERDOT));
+
+		Set<Set<UnifyPair>> expected = new HashSet<>();
+		
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
+		
+		System.out.println("Test Lambda6:");
+		System.out.println(actual);
+		
+		//Assert.assertEquals(expected, actual);
+	}
+	
 	@Test
 	public void unifyTestOverloading(){
 		/*
@@ -723,7 +890,7 @@ public class UnifyTest extends TypeUnify{
 		expectedSolution.add(new UnifyPair(tphT1, ol, PairOperator.EQUALSDOT));
 		
 		
-		Set<Set<UnifyPair>> actual = unify(eq, fc);
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println("Test Overloading:");
 		System.out.println(actual);
@@ -774,7 +941,7 @@ public class UnifyTest extends TypeUnify{
 		solution.add(new UnifyPair(tphT2, integer, PairOperator.EQUALSDOT));
 		expected.add(solution);
 		
-		Set<Set<UnifyPair>> actual = unify(eq, fc);
+		Set<Set<UnifyPair>> actual = new TypeUnify().unifySequential(eq, fc);
 		
 		System.out.println("Test Subclass:");
 		System.out.println(actual);