diff --git a/Switch.java b/Switch.java
new file mode 100644
index 00000000..9f1d73c0
--- /dev/null
+++ b/Switch.java
@@ -0,0 +1,21 @@
+
+public class Switch {
+    public static void main(String[] args) {
+        CharSequence s = "some string";
+        /*var res = switch (s) {
+            case "AaAaAa" -> 20;
+            case "AaAaBB" -> 30;
+            case String y -> 40;
+            case CharSequence cs -> 30;
+        };*/
+
+        var i = s instanceof String s2;
+        //System.out.println(s2);
+
+        if (!(s instanceof String s2)) {
+            System.out.println(s2);
+        } else {
+            System.out.println(s2);
+        }
+    }
+}
diff --git a/resources/AllgemeinTest/Complex.jav b/resources/AllgemeinTest/Complex.jav
new file mode 100644
index 00000000..15d5c5d7
--- /dev/null
+++ b/resources/AllgemeinTest/Complex.jav
@@ -0,0 +1,22 @@
+class Pair<U, T> {
+    U a;
+    T b;
+    Pair(U x, T y) {
+        a = x; b = y;
+    }
+}
+
+class Complex {
+    m(b) {
+        var c = b;
+        var d = c;
+        var e;
+        d = e;
+        var r1 = e;
+        var f = e;
+        var g;
+        f = g;
+        var r2 = g;
+        return new Pair<>(r1, r2);
+    }
+}
\ No newline at end of file
diff --git a/resources/AllgemeinTest/InfReturn.jav b/resources/AllgemeinTest/InfReturn.jav
new file mode 100644
index 00000000..d1f62119
--- /dev/null
+++ b/resources/AllgemeinTest/InfReturn.jav
@@ -0,0 +1,7 @@
+public class InfReturn {
+    m(a) {
+        var ret;
+        a = ret;
+        return ret;
+    }
+}
\ No newline at end of file
diff --git a/resources/AllgemeinTest/InfReturnII.jav b/resources/AllgemeinTest/InfReturnII.jav
new file mode 100644
index 00000000..e1e9597e
--- /dev/null
+++ b/resources/AllgemeinTest/InfReturnII.jav
@@ -0,0 +1,8 @@
+public class InfReturnII {
+    m(a, b) {
+        var ret;
+        a = ret;
+        b = ret;
+        return ret;
+    }
+}
\ No newline at end of file
diff --git a/resources/AllgemeinTest/InnerInf.jav b/resources/AllgemeinTest/InnerInf.jav
new file mode 100644
index 00000000..4eaa183a
--- /dev/null
+++ b/resources/AllgemeinTest/InnerInf.jav
@@ -0,0 +1,7 @@
+class InnerInf {
+    m(a, b) {
+        var i;
+        a = i;
+        b = i;
+    }
+}
\ No newline at end of file
diff --git a/resources/AllgemeinTest/Overloading.jav b/resources/AllgemeinTest/Overloading.jav
new file mode 100644
index 00000000..28098133
--- /dev/null
+++ b/resources/AllgemeinTest/Overloading.jav
@@ -0,0 +1,7 @@
+import java.lang.Integer;
+import java.lang.Double;
+
+class Overloading {
+	m(x) { return x + x; }
+	m(x) { return x || x; }
+}
\ No newline at end of file
diff --git a/resources/AllgemeinTest/RecursionCond.jav b/resources/AllgemeinTest/RecursionCond.jav
new file mode 100644
index 00000000..16404714
--- /dev/null
+++ b/resources/AllgemeinTest/RecursionCond.jav
@@ -0,0 +1,8 @@
+class RecursionCond {
+    m(a, b, c) {
+        if (1 == 2) {
+            b = m(a, b);
+            c = m(a, b);
+        } else return a;
+    }
+}
\ No newline at end of file
diff --git a/resources/AllgemeinTest/Test.jav b/resources/AllgemeinTest/Test.jav
new file mode 100644
index 00000000..48491b83
--- /dev/null
+++ b/resources/AllgemeinTest/Test.jav
@@ -0,0 +1,9 @@
+import java.lang.Boolean;
+import java.lang.Integer;
+
+public class Test {
+	fac = (x) -> {
+		if (x == 1) { return 1; }
+		return x * fac.apply(x - 1);
+	};
+}
\ No newline at end of file
diff --git a/resources/bytecode/javFiles/Fac.jav b/resources/bytecode/javFiles/Fac.jav
index 2edee01e..1e092355 100644
--- a/resources/bytecode/javFiles/Fac.jav
+++ b/resources/bytecode/javFiles/Fac.jav
@@ -1,12 +1,12 @@
 import java.lang.Integer;
 import java.lang.Double;
+import java.lang.String;
 
-public class Fac  {
-	
-	getFac(n){
+public class Fac {
+	getFac(n) {
 		var res = 1;
 		var i = 1;
-		while(i<=n) {
+		while (i <= n) {
 			res = res * i;
 			i++;
 		}
diff --git a/resources/bytecode/javFiles/OverloadPattern.jav b/resources/bytecode/javFiles/OverloadPattern.jav
index e6025de7..c016a258 100644
--- a/resources/bytecode/javFiles/OverloadPattern.jav
+++ b/resources/bytecode/javFiles/OverloadPattern.jav
@@ -1,12 +1,18 @@
 import java.lang.Integer;
+import java.lang.Float;
+import java.lang.Number;
 
-record Point(Integer x, Integer y) {}
+record Point(Number x, Number y) {}
 
 public class OverloadPattern {
     m(Point(Integer x, Integer y)) {
         return x + y;
     }
 
+    m(Point(Float x, Float y)) {
+        return x * y;
+    }
+
     m(Integer x) {
         return x;
     }
diff --git a/resources/bytecode/javFiles/Switch2.jav b/resources/bytecode/javFiles/Switch2.jav
new file mode 100644
index 00000000..c75aaa5b
--- /dev/null
+++ b/resources/bytecode/javFiles/Switch2.jav
@@ -0,0 +1,13 @@
+import java.lang.Integer;
+
+record Point(x, y) {}
+
+class Switch2 {
+	m() {
+		var pt = new Point(10, 20);
+		return switch (pt) {
+		case Point(x, y) -> 10;
+		default -> 20;
+		};
+	}
+}
\ No newline at end of file
diff --git a/resources/bytecode/javFiles/Tph2.jav b/resources/bytecode/javFiles/Tph2.jav
index da9b220a..04ea5ba0 100644
--- a/resources/bytecode/javFiles/Tph2.jav
+++ b/resources/bytecode/javFiles/Tph2.jav
@@ -1,18 +1,6 @@
 public class Tph2 {
-    id = x->x;
+   	id = x->x;
     id3 (x) {
         return id.apply(x);
     }
-
-/*
-	m(a,b){
-		var c = m2(a,b);
-		//m2(a,b);
-		return a;
-	}
-	
-	m2(a,b){
-		return b;
-	}
-*/
 }
\ No newline at end of file
diff --git a/src/main/antlr4/de/dhbwstuttgart/parser/antlr/Java17Parser.g4 b/src/main/antlr4/de/dhbwstuttgart/parser/antlr/Java17Parser.g4
index ce974a10..be87c4d7 100644
--- a/src/main/antlr4/de/dhbwstuttgart/parser/antlr/Java17Parser.g4
+++ b/src/main/antlr4/de/dhbwstuttgart/parser/antlr/Java17Parser.g4
@@ -668,6 +668,11 @@ recordStructurePattern
     : '(' recordComponentPatternList? ')'
     ;
 
+recordComponentPatternElement
+    : pattern
+    | identifier
+    ;
+
 recordComponentPatternList
     : pattern (',' pattern)*
     ;
diff --git a/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java b/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java
index 0723aaef..09f58d64 100644
--- a/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java
+++ b/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java
@@ -1133,7 +1133,10 @@ public class Codegen {
             else if (label instanceof TargetGuard guard)
                 types.add(Type.getObjectType(guard.inner().type().getInternalName()));
             // TODO Same here we need to evaluate constant;
-            else throw new NotImplementedException();
+            else {
+                System.out.println(label);
+                throw new NotImplementedException();
+            }
         }
 
         mv.visitInvokeDynamicInsn("typeSwitch", "(Ljava/lang/Object;I)I", bootstrap, types.toArray());
@@ -1330,6 +1333,7 @@ public class Codegen {
                     state.mv.visitInsn(DUP);
 
                 extractField(state, cp.type(), i, clazz);
+                state.mv.visitTypeInsn(CHECKCAST, subPattern.type().getInternalName());
                 state.mv.visitVarInsn(ASTORE, offset);
                 offset = bindLocalVariables(state, subPattern, offset, i);
             }
diff --git a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
index b84f89b4..d0cd4f44 100644
--- a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
+++ b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
@@ -189,7 +189,7 @@ public class SyntaxTreeGenerator {
     Token offset = ctx.getStart();
     GenericDeclarationList genericClassParameters;
     if (ctx.genericDeclarationList() == null) {
-      genericClassParameters = new GenericDeclarationList(new ArrayList<>(), ctx.identifier().getStop());
+      genericClassParameters = new GenericDeclarationList(new ArrayList<>(), ctx.classBody().getStart());
     } else {
       genericClassParameters = TypeGenerator.convert(ctx.genericDeclarationList(), name, "", reg, generics);
     }
@@ -239,7 +239,7 @@ public class SyntaxTreeGenerator {
     }
     GenericDeclarationList genericClassParameters;
     if (recordDeclaration.genericDeclarationList() == null) {
-      genericClassParameters = new GenericDeclarationList(new ArrayList<>(), recordDeclaration.identifier().getStop());
+      genericClassParameters = new GenericDeclarationList(new ArrayList<>(), recordDeclaration.recordBody().getStart());
     } else {
       genericClassParameters = TypeGenerator.convert(recordDeclaration.genericDeclarationList(), name, "", reg, generics);
     }
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java b/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java
index d4732079..0b7d9e67 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java
@@ -301,7 +301,6 @@ public abstract class AbstractASTWalker implements ASTVisitor {
 
     @Override
     public void visit(Yield aYield) {
-        aYield.accept(this);
     }
 
     @Override
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java b/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java
index cb9c0488..96f31cf7 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/factory/ASTFactory.java
@@ -4,24 +4,20 @@ import java.io.IOException;
 import java.lang.reflect.*;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Type;
-import java.nio.file.Files;
-import java.nio.file.Path;
 import java.util.*;
 
 import de.dhbwstuttgart.bytecode.JavaTXSignatureAttribute;
 import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.parser.scope.JavaClassName;
+import de.dhbwstuttgart.syntaxtree.*;
 import de.dhbwstuttgart.syntaxtree.Field;
 import de.dhbwstuttgart.syntaxtree.Method;
 import de.dhbwstuttgart.syntaxtree.type.*;
 import de.dhbwstuttgart.syntaxtree.type.Void;
-import de.dhbwstuttgart.syntaxtree.*;
 import de.dhbwstuttgart.syntaxtree.statement.Block;
 import de.dhbwstuttgart.syntaxtree.statement.Statement;
 import de.dhbwstuttgart.syntaxtree.type.WildcardType;
-import de.dhbwstuttgart.target.tree.type.TargetRefType;
 import de.dhbwstuttgart.util.Pair;
-import javassist.bytecode.SignatureAttribute;
 import org.antlr.v4.runtime.Token;
 import org.apache.commons.io.IOUtils;
 import org.objectweb.asm.*;
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
index b180fc96..ffbed416 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
@@ -381,7 +381,12 @@ public class TYPEStmt implements StatementVisitor {
     }
 
     @Override
-    public void visit(BoolExpression bool) {
+    public void visit(BoolExpression expr) {
+
+        constraintsSet.addUndConstraint(new Pair(bool, expr.getType(), PairOperator.EQUALSDOT));
+        constraintsSet.addUndConstraint(new Pair(bool, expr.lexpr.getType(), PairOperator.EQUALSDOT));
+        constraintsSet.addUndConstraint(new Pair(bool, expr.rexpr.getType(), PairOperator.EQUALSDOT));
+
         // TODO
         return;
     }
diff --git a/src/test/java/AllgemeinTest.java b/src/test/java/AllgemeinTest.java
index 43ea42b3..d5ed575a 100644
--- a/src/test/java/AllgemeinTest.java
+++ b/src/test/java/AllgemeinTest.java
@@ -57,7 +57,9 @@ public class AllgemeinTest {
 		//String className = "UseWildcardPair";
 		//String className = "Assign";
 		//String className = "StreamTest";
-		String className = "Iteration";
+		//String className = "Iteration";
+		String className = "Test";
+
 		//PL 2019-10-24: genutzt fuer unterschiedliche Tests
 		path = System.getProperty("user.dir")+"/resources/AllgemeinTest/" + className + ".jav";
 		//path = System.getProperty("user.dir")+"/src/test/resources/AllgemeinTest/Overloading_Generics.jav";
@@ -66,10 +68,10 @@ public class AllgemeinTest {
 		///*
 		   compiler = new JavaTXCompiler(
                 Lists.newArrayList(new File(path)),
-                Lists.newArrayList(new File(System.getProperty("user.dir")+"/resources/testBytecode/generatedBC/")));
+                Lists.newArrayList(new File(System.getProperty("user.dir")+"/resources/bytecode/classFiles/")));
 		//*/
-		compiler.generateBytecode(System.getProperty("user.dir")+"/resources/testBytecode/generatedBC/");
-		pathToClassFile = System.getProperty("user.dir")+"/resources/testBytecode/generatedBC/";
+		compiler.generateBytecode(System.getProperty("user.dir")+"/resources/bytecode/classFiles/");
+		pathToClassFile = System.getProperty("user.dir")+"/resources/bytecode/classFiles/";
 		loader = new URLClassLoader(new URL[] {new URL("file://"+pathToClassFile)});
 		classToTest = loader.loadClass(className);
 		//classToTest = loader.loadClass("Overloading_Generics");
diff --git a/src/test/java/TestComplete.java b/src/test/java/TestComplete.java
index e3a0c60f..9265e83a 100644
--- a/src/test/java/TestComplete.java
+++ b/src/test/java/TestComplete.java
@@ -671,6 +671,13 @@ public class TestComplete {
         assertEquals(swtch.invoke(instance, "Some string"), 0);
     }
 
+    @Test
+    public void testSwitch2() throws Exception {
+        var classFiles = generateClassFiles(new ByteArrayClassLoader(), "Switch2.jav");
+        var clazz = classFiles.get("Switch2");
+        var instance = clazz.getDeclaredConstructor().newInstance();
+    }
+
     @Test
     public void testStringSwitch() throws Exception {
         var classFiles = generateClassFiles(new ByteArrayClassLoader(), "SwitchString.jav");
@@ -702,7 +709,7 @@ public class TestComplete {
         var m1 = clazz.getDeclaredMethod("m", rec);
         var m2 = clazz.getDeclaredMethod("m", Integer.class);
 
-        var pt = rec.getDeclaredConstructor(Integer.class, Integer.class).newInstance(10, 20);
+        var pt = rec.getDeclaredConstructor(Number.class, Number.class).newInstance(10, 20);
         assertEquals(m1.invoke(instance, pt), 30);
         assertEquals(m2.invoke(instance, 10), 10);
     }