FIR IDE: quickfix to make class abstract if member not implemented

idea/idea-fir/src/org/jetbrains/kotlin/idea/quickfix/MainKtQuickFixRegistrar.kt

@@ -54,6 +54,14 @@ class MainKtQuickFixRegistrar : KtQuickFixRegistrar() {
             RemoveModifierFix.removeNonRedundantModifier,
             ChangeVariableMutabilityFix.CONST_VAL_FACTORY
         )
+        registerPsiQuickFixes(
+            KtFirDiagnostic.AbstractMemberNotImplemented::class,
+            AddModifierFix.addAbstractModifier
+        )
+        registerPsiQuickFixes(
+            KtFirDiagnostic.AbstractClassMemberNotImplemented::class,
+            AddModifierFix.addAbstractModifier
+        )
     }
 
     private val propertyInitialization = KtQuickFixesListBuilder.registerPsiQuickFix {

idea/idea-fir/tests/org/jetbrains/kotlin/idea/quickfix/HighLevelQuickFixTestGenerated.java

@@ -436,6 +436,16 @@ public class HighLevelQuickFixTestGenerated extends AbstractHighLevelQuickFixTes
             KotlinTestUtils.runTest(this::doTest, this, testDataFilePath);
         }
 
+        @TestMetadata("abstractClassMemberNotImplemented.kt")
+        public void testAbstractClassMemberNotImplemented() throws Exception {
+            runTest("idea/testData/quickfix/modifiers/abstractClassMemberNotImplemented.kt");
+        }
+
+        @TestMetadata("abstractMemberNotImplemented.kt")
+        public void testAbstractMemberNotImplemented() throws Exception {
+            runTest("idea/testData/quickfix/modifiers/abstractMemberNotImplemented.kt");
+        }
+
         @TestMetadata("abstractModifierInEnum.kt")
         public void testAbstractModifierInEnum() throws Exception {
             runTest("idea/testData/quickfix/modifiers/abstractModifierInEnum.kt");

idea/testData/quickfix/modifiers/abstractClassMemberNotImplemented.kt

@@ -0,0 +1,7 @@
+// "Make 'Foo' 'abstract'" "true"
+
+abstract class Bar {
+    abstract val i: Int
+}
+
+class <caret>Foo : Bar() {}

idea/testData/quickfix/modifiers/abstractClassMemberNotImplemented.kt.after

@@ -0,0 +1,7 @@
+// "Make 'Foo' 'abstract'" "true"
+
+abstract class Bar {
+    abstract val i: Int
+}
+
+abstract class <caret>Foo : Bar() {}

idea/testData/quickfix/modifiers/abstractMemberNotImplemented.kt

@@ -0,0 +1,3 @@
+// "Make 'Foo' 'abstract'" "true"
+
+class <caret>Foo : List<String> {}

idea/testData/quickfix/modifiers/abstractMemberNotImplemented.kt.after

@@ -0,0 +1,3 @@
+// "Make 'Foo' 'abstract'" "true"
+
+abstract class <caret>Foo : List<String> {}

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -9119,6 +9119,16 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             KotlinTestUtils.runTest(this::doTest, this, testDataFilePath);
         }
 
+        @TestMetadata("abstractClassMemberNotImplemented.kt")
+        public void testAbstractClassMemberNotImplemented() throws Exception {
+            runTest("idea/testData/quickfix/modifiers/abstractClassMemberNotImplemented.kt");
+        }
+
+        @TestMetadata("abstractMemberNotImplemented.kt")
+        public void testAbstractMemberNotImplemented() throws Exception {
+            runTest("idea/testData/quickfix/modifiers/abstractMemberNotImplemented.kt");
+        }
+
         @TestMetadata("abstractModifierInEnum.kt")
         public void testAbstractModifierInEnum() throws Exception {
             runTest("idea/testData/quickfix/modifiers/abstractModifierInEnum.kt");