Fix <?> Wildcard not working in STG, fixes #287

resources/bytecode/javFiles/Wildcards.jav

@@ -0,0 +1,8 @@
+import java.util.List;
+import java.lang.Number;
+
+public class Wildcards {
+    public void m1(List<?> a) {}
+    public void m2(List<? extends Number> a) {}
+    public void m3(List<? super Number> a) {}
+}

src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/TypeGenerator.java

@@ -2,6 +2,7 @@ package de.dhbwstuttgart.parser.SyntaxTreeGenerator;
 
 import de.dhbwstuttgart.exceptions.NotImplementedException;
 import de.dhbwstuttgart.exceptions.TypeinferenceException;
+import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.parser.antlr.Java17Parser;
 import de.dhbwstuttgart.parser.antlr.Java17Parser.IdentifierContext;
 import de.dhbwstuttgart.parser.antlr.Java17Parser.TypeArgumentsContext;
@@ -121,8 +122,10 @@ public class TypeGenerator {
         if (wildcardContext.getChildCount() < 3) {
             if (!Objects.isNull(wildcardContext.extendsWildcardType())) {
                 return new ExtendsWildcardType(convert(wildcardContext.extendsWildcardType().typeType(), reg, generics), wildcardContext.getStart());
-            } else {
+            } else if (!Objects.isNull(wildcardContext.superWildcardType())) {
                 return new SuperWildcardType(convert(wildcardContext.superWildcardType().typeType(), reg, generics), wildcardContext.getStart());
+            } else {
+                return new ExtendsWildcardType(new RefType(new JavaClassName("java.lang.Object"), new NullToken()), wildcardContext.getStart());
             }
         } else {
             throw new NotImplementedException(); // Wildcard ohne Bound

src/test/java/TestComplete.java

@@ -881,6 +881,14 @@ public class TestComplete {
         var instance = clazz.getDeclaredConstructor().newInstance();
     }
 
+    @Test
+    public void testWilcards() throws Exception {
+        var classFiles = generateClassFiles(new ByteArrayClassLoader(), "Wildcards.jav");
+        var clazz = classFiles.get("Wildcards");
+        var instance = clazz.getDeclaredConstructor().newInstance();
+    }
+
+
     @Test
     public void testBug122() throws Exception {
         var classFiles = generateClassFiles(new ByteArrayClassLoader(), "Bug122.jav");