[FE 1.0] 2/2 Don't report a warning when new members are added to open expect actualization

^KT-62655 Fixed

Author: nikitabobko

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated.java

@@ -843,8 +843,6 @@ public interface Errors {
     DiagnosticFactory3<KtClassLikeDeclaration, ClassifierDescriptorWithTypeParameters, Set<ExpectActualMemberDiff<CallableMemberDescriptor, ClassDescriptor>>, ClassDescriptor>
             ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING =
             DiagnosticFactory3.create(WARNING, DECLARATION_NAME);
-    DiagnosticFactory1<KtCallableDeclaration, ExpectActualMemberDiff<CallableMemberDescriptor, ClassDescriptor>>
-            NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING = DiagnosticFactory1.create(WARNING, DECLARATION_NAME);
     DiagnosticFactory1<KtCallableDeclaration, ExpectActualMemberDiff<CallableMemberDescriptor, ClassDescriptor>>
             UNKNOWN_PROBLEM_DURING_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING = DiagnosticFactory1.create(WARNING, DECLARATION_NAME);
     DiagnosticFactory1<KtCallableDeclaration, ExpectActualMemberDiff<CallableMemberDescriptor, ClassDescriptor>>

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithPsiTestGenerated.java

@@ -403,9 +403,6 @@ public static DiagnosticRenderer getRendererForDiagnostic(@NotNull UnboundDiagno
                 CAPITALIZED_DECLARATION_NAME_WITH_KIND_AND_PLATFORM,
                 ExpectActualScopeDiffsRenderer.TEXT,
                 NAME);
-        MAP.put(NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING,
-                "{0}. This warning will become an error in future releases. Also see https://youtrack.jetbrains.com/issue/KT-22841 for more details",
-                ExpectActualScopeDiffRenderer.INSTANCE);
         MAP.put(UNKNOWN_PROBLEM_DURING_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING,
                 "{0}. This warning will become an error in future releases. Also see https://youtrack.jetbrains.com/issue/KT-22841 for more details",
                 ExpectActualScopeDiffRenderer.INSTANCE);

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Errors.java

@@ -9,7 +9,6 @@ import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.diagnostics.Errors
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
-import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.BindingTrace
 import org.jetbrains.kotlin.resolve.calls.mpp.AbstractExpectActualCompatibilityChecker
@@ -126,7 +125,7 @@ private fun calculateExpectActualScopeDiff(
     return actualClassCallables.flatMap { actualMember ->
         val potentialExpects = nameAndKindToExpectCallables[actualMember.name to actualMember.functionVsPropertyKind]
         if (potentialExpects.isNullOrEmpty()) {
-            listOf(ExpectActualMemberDiff.Kind.NonPrivateCallableAdded)
+            emptyList<ExpectActualMemberDiff.Kind>()
         } else {
             potentialExpects
                 .map { expectMember ->
@@ -141,9 +140,19 @@ private fun calculateExpectActualScopeDiff(
                 }
                 .takeIf { kinds -> kinds.all { it != ExpectActualCompatibility.Compatible } }
                 .orEmpty()
-                .map {
+                .mapNotNull {
                     when (it) {
                         is ExpectActualCompatibility.Compatible -> error("Compatible was filtered out by takeIf")
+                        ExpectActualCompatibility.Incompatible.CallableKind,
+                        ExpectActualCompatibility.Incompatible.ParameterCount,
+                        ExpectActualCompatibility.Incompatible.ParameterShape,
+                        ExpectActualCompatibility.Incompatible.ParameterTypes,
+                        ExpectActualCompatibility.Incompatible.FunctionTypeParameterCount,
+                        ExpectActualCompatibility.Incompatible.FunctionTypeParameterUpperBounds,
+                            // Don't report "matching" (aka "strong") incompatibilities, because it's
+                            // incompatibilities that happen only when a new member added
+                        -> null
+
                         is ExpectActualCompatibility.Incompatible -> it.toMemberDiffKind()
                         // If toMemberDiffKind returns null then some Kotlin invariants described in toMemberDiffKind no longer hold.
                         // We can't throw exception here because it would crash the compilation.
@@ -180,8 +189,6 @@ private val CallableMemberDescriptor.psiIfReal: KtCallableDeclaration?
 private fun BindingTrace.reportIfPossible(diff: ExpectActualMemberDiff<CallableMemberDescriptor, ClassDescriptor>) {
     val psi = diff.actualMember.psiIfReal ?: return
     val diagnostic = when (diff.kind) {
-        ExpectActualMemberDiff.Kind.NonPrivateCallableAdded ->
-            Errors.NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING.on(psi, diff)
         ExpectActualMemberDiff.Kind.ReturnTypeChangedInOverride ->
             Errors.RETURN_TYPE_CHANGED_IN_NON_FINAL_EXPECT_CLASSIFIER_ACTUALIZATION_WARNING.on(psi, diff)
         ExpectActualMemberDiff.Kind.ModalityChangedInOverride ->

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -9,11 +10,11 @@ expect open class Foo {
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual typealias <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>Foo<!> = FooImpl
+actual typealias Foo = FooImpl
 
 open class FooImpl {
     fun existingMethod() {}
     val existingParam: Int = 904
 
-    fun injectedMethod() {} // accidential override can happen with this injected fun. That's why it's prohibited
+    fun injectedMethod() {}
 }

compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/ActualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -8,8 +9,8 @@ expect open class Foo {
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual open <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>class Foo<!> {
+actual open class Foo {
     actual fun foo() {}
 
-    fun Int.<!NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING!>foo<!>() {} // accidential override can happen with this injected fun. That's why it's prohibited
+    fun Int.foo() {}
 }

compiler/testData/diagnostics/tests/multiplatform/actualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker/actualTypealias.fir.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -10,6 +11,6 @@ expect open class Foo : Base
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual open <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>class Foo<!> : Base() {
-    fun <T : Comparable<T>> <!NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING!>foo<!>(t: T) {}
+actual open class Foo : Base() {
+    fun <T : Comparable<T>> foo(t: T) {}
 }

compiler/testData/diagnostics/tests/multiplatform/actualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker/actualTypealias.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -9,9 +10,9 @@ expect open class Foo {
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual open <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>class Foo<!> {
+actual open class Foo {
     actual fun existingMethod() {}
     actual val existingParam: Int = 904
 
-    internal fun <!NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING!>injectedMethod<!>() {} // accidential override can happen with this injected fun. That's why it's prohibited
+    internal fun injectedMethod() {}
 }

compiler/testData/diagnostics/tests/multiplatform/actualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker/injectExtensionReceiverOverload.fir.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -9,9 +10,9 @@ expect open class Foo {
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual open <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>class Foo<!> {
+actual open class Foo {
     actual fun existingMethod() {}
     actual val existingParam: Int = 904
 
-    protected fun <!NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING!>injectedMethod<!>() {} // accidential override can happen with this injected fun. That's why it's prohibited
+    protected fun injectedMethod() {}
 }

compiler/testData/diagnostics/tests/multiplatform/actualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker/injectExtensionReceiverOverload.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -9,9 +10,9 @@ expect open class Foo {
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual open <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>class Foo<!> {
+actual open class Foo {
     actual fun existingMethod() {}
     actual val existingParam: Int = 904
 
-    fun <!NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING!>injectedMethod<!>() {} // accidential override can happen with this injected fun. That's why it's prohibited
+    fun injectedMethod() {}
 }

compiler/testData/diagnostics/tests/multiplatform/actualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker/injectGenericUpperBoundOverload.fir.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -8,7 +9,7 @@ expect open class Foo {
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual typealias <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>Foo<!> = FooImpl
+actual typealias Foo = FooImpl
 
 // FILE: Foo.java
 

compiler/testData/diagnostics/tests/multiplatform/actualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker/injectGenericUpperBoundOverload.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -8,8 +9,8 @@ expect open class Foo {
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual open <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>class Foo<!> {
+actual open class Foo {
     actual fun foo() {}
 
-    fun <!NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING!>foo<!>(overloaded: Int) {} // accidential override can happen with this injected fun. That's why it's prohibited
+    fun foo(overloaded: Int) {}
 }

compiler/testData/diagnostics/tests/multiplatform/actualClassifierMustHasTheSameMembersAsNonFinalExpectClassifierChecker/injectMethod_internalMethod.fir.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -10,6 +11,6 @@ expect open class Foo<R> : Base<R>
 // MODULE: m2-jvm()()(m1-common)
 // FILE: jvm.kt
 
-actual open <!ACTUAL_CLASSIFIER_MUST_HAVE_THE_SAME_MEMBERS_AS_NON_FINAL_EXPECT_CLASSIFIER_WARNING!>class Foo<!><R>() : Base<R>() {
-    fun <T> <!NON_ACTUAL_MEMBER_DECLARED_IN_EXPECT_NON_FINAL_CLASSIFIER_ACTUALIZATION_WARNING!>foo<!>(t: T) {}
+actual open class Foo<R>() : Base<R>() {
+    fun <T> foo(t: T) {}
 }