Work on #378

resources/bytecode/javFiles/Bug378Id.jav

@@ -0,0 +1,3 @@
+class Bug378Id {
+    id2 = x -> x;
+}

resources/bytecode/javFiles/Bug378Main.jav

@@ -0,0 +1,8 @@
+import Bug378Id;
+import java.lang.Integer;
+
+class Bug378Main {
+    static main(args) {
+        var hallo = (new Bug378Id<Integer>().id2).apply(1);
+    }
+}

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

@@ -161,7 +161,6 @@ public class StatementToTargetExpression implements ASTVisitor {
 
     @Override
     public void visit(FieldVar fieldVar) {
-        var isStatic = false;
         var type = converter.convert(fieldVar.receiver.getType());
         var clazz = converter.compiler.getClass(new JavaClassName(type.name()));
         var field = clazz.getField(fieldVar.fieldVarName).orElseThrow();

src/main/java/de/dhbwstuttgart/target/tree/type/TargetFunNType.java

@@ -33,4 +33,10 @@ public record TargetFunNType(String name, List<TargetType> funNParams, List<Targ
     public String getInternalName() {
         return name;
     }
+
+    @Override
+    public String toSignature() {
+        var args = FunNGenerator.getArguments(params);
+        return "LFun" + args.size() + "$$" + TargetSpecializedType.signatureParameters(params) + ";";
+    }
 }

src/main/java/de/dhbwstuttgart/target/tree/type/TargetSpecializedType.java

@@ -8,14 +8,20 @@ public sealed interface TargetSpecializedType extends TargetType permits TargetF
     @Override
     default String toSignature() {
         String ret = "L" + getInternalName();
-        if (!params().isEmpty()) {
+        ret += signatureParameters(params());
+        ret += ";";
+        return ret;
+    }
+
+    static String signatureParameters(List<TargetType> params) {
+        var ret = "";
+        if (!params.isEmpty()) {
             ret += "<";
-            for (var param : params()) {
+            for (var param : params) {
                 ret += param.toSignature();
             }
             ret += ">";
         }
-        ret += ";";
         return ret;
     }
 

src/test/java/TestComplete.java

@@ -1476,4 +1476,14 @@ public class TestComplete {
         var m = clazz.getDeclaredMethod("main");
         m.invoke(null);
     }
+
+    @Disabled("Doesn't work yet")
+    @Test
+    public void testBug378() throws Exception {
+        var classFiles = generateClassFiles(createClassLoader(), "Bug378Main.jav");
+        var clazz = classFiles.get("Bug378Main");
+        var main = clazz.getDeclaredMethod("main", List.class);
+        main.setAccessible(true);
+        main.invoke(null, List.of());
+    }
 }