Give error on duplicate fields

resources/bytecode/javFiles/HelloWorld.jav

@@ -5,6 +5,8 @@ import java.lang.Object;
 
 public class HelloWorld {
     public static hello() {
-        System.out.println((Object)"Hello World!");
+        System.out.println("Hello World!");
+        System.out.println("Bye World!");
+        System.out.println("The end!");
     }
 }

src/main/java/de/dhbwstuttgart/target/generate/ASTToTargetAST.java

@@ -381,8 +381,21 @@ public class ASTToTargetAST {
         TargetBlock finalFieldInitializer = fieldInitializer;
 
         var superInterfaces = input.getSuperInterfaces().stream().map(clazz -> convert(clazz, generics.javaGenerics, compiler)).toList();
-        var constructors = input.getConstructors().stream().map(constructor -> this.convert(input, constructor, finalFieldInitializer, generics)).flatMap(List::stream).toList();
-        var fields = input.getFieldDecl().stream().map(f -> convert(f, generics.javaGenerics)).toList();
+        var constructors = input.getConstructors().stream().map(constructor -> {
+            try {
+                return this.convert(input, constructor, finalFieldInitializer, generics);
+            } catch (DiscardResultSet discard) {
+                return null;
+            }
+        }
+        ).filter(Objects::nonNull).flatMap(List::stream).toList();
+        var fields = input.getFieldDecl().stream().map(f -> {
+            var possibleTypes = new HashSet<TargetType>();
+            for (var g : all) possibleTypes.add(convert(f.getType(), g.javaGenerics(), compiler));
+            if (possibleTypes.size() > 1)
+                compiler.warn(new CompilerWarning(f.getOffset(), "Multiple possible types for field " + f.getName() + ": " + possibleTypes + " please select one"));
+            return convert(f, generics.javaGenerics);
+        }).toList();
         var m0 = groupMethods(input, input.getMethods());
 
         var m1 = new ArrayList<TargetMethod>();
@@ -889,10 +902,13 @@ public class ASTToTargetAST {
             signatures.add(new Signature(javaSignature, txSignature, generics));
         }
 
-        if (!signatures.isEmpty()) {
-            var signature = signatures.getFirst();
-            // We need to convert once to find out what TPHs are existing in the given method
-            convert(new MethodWithTphs(method, signature.generics, signature));
+        for (var signature : new ArrayList<>(signatures)) {
+            try {
+                convert(new MethodWithTphs(method, signature.generics, signature));
+            } catch (DiscardResultSet discard) {
+                 // If a result set is discarded we skip it from now on
+                signatures.removeIf(s -> s == signature);
+            }
         }
 
         for (var signature : signatures) {
@@ -980,7 +996,7 @@ public class ASTToTargetAST {
         return null;
     }
 
-    private boolean isSubtype(TargetType test, TargetType other) {
+    public boolean isSubtype(TargetType test, TargetType other) {
         if (other.equals(TargetType.Object)) return true;
         if (test instanceof TargetFunNType tfun && other instanceof TargetFunNType ofun)
             return isSubtype(new FunNGenerator.GenericParameters(tfun), new FunNGenerator.GenericParameters(ofun));

src/main/java/de/dhbwstuttgart/target/generate/DiscardResultSet.java

@@ -0,0 +1,9 @@
+package de.dhbwstuttgart.target.generate;
+
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+
+import java.util.List;
+
+public class DiscardResultSet extends RuntimeException {
+    public DiscardResultSet() {}
+}

src/main/java/de/dhbwstuttgart/target/generate/StatementToTargetExpression.java

@@ -1,5 +1,6 @@
 package de.dhbwstuttgart.target.generate;
 
+import com.google.common.collect.Iterables;
 import de.dhbwstuttgart.core.JavaTXCompiler;
 import de.dhbwstuttgart.exceptions.DebugException;
 import de.dhbwstuttgart.exceptions.NotImplementedException;
@@ -222,6 +223,19 @@ public class StatementToTargetExpression implements ASTVisitor {
 
     @Override
     public void visit(MethodCall methodCall) {
+
+        // Look at the signature in all result sets and check if a more specific insertion exists.
+        // If so, discard this result set by throwing an exception
+        for (var tph : Iterables.concat(List.of(methodCall.receiver.getType()), methodCall.signatureArguments())) {
+            var currentType = converter.convert(tph, generics);
+            for (var g2 : converter.all) if (g2.javaGenerics() != generics) {
+                var type = g2.javaGenerics().getTargetType(tph);
+                if (!Objects.equals(type, currentType) && converter.isSubtype(type, currentType)) {
+                    throw new DiscardResultSet();
+                }
+            }
+        }
+
         var receiverType = converter.convert(methodCall.receiver.getType(), generics);
         var isFunNType = receiverType instanceof TargetFunNType;
 
@@ -261,7 +275,6 @@ public class StatementToTargetExpression implements ASTVisitor {
             isInterface = receiverClass.isInterface();
         }
 
-        //System.out.println(argList);
         result = new TargetMethodCall(
             converter.convert(methodCall.getType(), generics), returnType, argList,
             converter.convert(methodCall.receiver, generics),

src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java

@@ -392,6 +392,8 @@ public class TYPEStmt implements StatementVisitor {
 
     @Override
     public void visit(BoolExpression expr) {
+        expr.lexpr.accept(this);
+        expr.rexpr.accept(this);
 
         constraintsSet.addUndConstraint(new Pair(bool, expr.getType(), PairOperator.EQUALSDOT, loc(expr.getOffset())));
         constraintsSet.addUndConstraint(new Pair(bool, expr.lexpr.getType(), PairOperator.EQUALSDOT, loc(expr.getOffset())));