KT-13355

An overridden abstract member with a more specific "return type" than an overridden concrete member should be explicitly overridden even if the class in question can have abstract members.
2017-01-18 17:39:09 +03:00
parent f89de02ff0
commit b36e3bc083
8 changed files with 291 additions and 129 deletions
@@ -0,0 +1,47 @@
+// FILE: K.kt
+abstract class ATest1 : TestNN.JNullVsNotNull()
+
+abstract <!RETURN_TYPE_MISMATCH_ON_INHERITANCE!>class ATest2<!> : TestNN.JUnknownImpl(), TestNN.JNotNull
+
+abstract class ATest3 : TestNN.JUnknownVsNotNull()
+
+class CTest1 : TestNN.JNullVsNotNull()
+
+<!RETURN_TYPE_MISMATCH_ON_INHERITANCE!>class CTest2<!> : TestNN.JUnknownImpl(), TestNN.JNotNull
+
+class CTest3 : TestNN.JUnknownVsNotNull()
+
+// FILE: TestNN.java
+import org.jetbrains.annotations.*;
+
+public class TestNN {
+    public interface JNull {
+        @Nullable Object foo();
+    }
+
+    public interface JNotNull {
+        @NotNull Object foo();
+    }
+
+    public static class JNullVsNotNull implements JNull, JNotNull {
+        public Object foo() {
+            return this;
+        }
+    }
+
+    public static class JNullBase {
+        @Nullable public Object foo() {
+            return null;
+        }
+    }
+
+    public static class JUnknownImpl extends JNullBase {
+        public Object foo() {
+            return this;
+        }
+    }
+
+    public static class JUnknownVsNotNull extends JUnknownImpl implements JNotNull {
+    }
+}
+