KT-44487 [Sealed Interfaces]: sealed-inheritors-provider for MPP

idea/testData/multiplatform/whenExhaustivenessForSealed/common/common.kt

@@ -0,0 +1,7 @@
+expect sealed class <!LINE_MARKER("descr='Is subclassed by CommonAImplTestClass CommonImplTestClass PlatformAXImplTestClass PlatformAYImplTestClass'")!>TestClass<!>()
+class CommonImplTestClass: TestClass()
+
+
+fun checkCommon(t: TestClass): Int = when (t) {
+    is CommonImplTestClass -> 0
+}

idea/testData/multiplatform/whenExhaustivenessForSealed/commonA/commonA.kt

@@ -0,0 +1 @@
+class CommonAImplTestClass: <!SEALED_INHERITOR_IN_DIFFERENT_MODULE!>TestClass<!>()

idea/testData/multiplatform/whenExhaustivenessForSealed/dependencies.txt

@@ -0,0 +1,8 @@
+MODULE common { platform=[JVM, JS, Native]; additionalCompilerArgs=: -XXLanguage:+SealedInterfaces -XXLanguage:+AllowSealedInheritorsInDifferentFilesOfSamePackage }
+MODULE commonA { platform=[JVM]; additionalCompilerArgs=: -XXLanguage:+SealedInterfaces -XXLanguage:+AllowSealedInheritorsInDifferentFilesOfSamePackage }
+MODULE platformAX { platform=[JVM]; additionalCompilerArgs=: -XXLanguage:+SealedInterfaces -XXLanguage:+AllowSealedInheritorsInDifferentFilesOfSamePackage }
+MODULE platformAY { platform=[JVM]; additionalCompilerArgs=: -XXLanguage:+SealedInterfaces -XXLanguage:+AllowSealedInheritorsInDifferentFilesOfSamePackage }
+
+commonA -> common { kind=DEPENDS_ON }
+platformAX -> commonA { kind=DEPENDS_ON }
+platformAY -> commonA { kind=DEPENDS_ON }

idea/testData/multiplatform/whenExhaustivenessForSealed/platformAX/platformAX.kt

@@ -0,0 +1,8 @@
+actual sealed class <!LINE_MARKER("descr='Is subclassed by PlatformAXImplTestClass'")!>TestClass<!> actual constructor() {}
+class PlatformAXImplTestClass: TestClass()
+
+fun checkCommonAX(t: TestClass): Int = when (t) {
+    is CommonImplTestClass -> 0
+    is CommonAImplTestClass -> 1
+    is PlatformAXImplTestClass -> 2
+}

idea/testData/multiplatform/whenExhaustivenessForSealed/platformAY/platformAY.kt

@@ -0,0 +1,8 @@
+actual sealed class <!LINE_MARKER("descr='Is subclassed by PlatformAYImplTestClass'")!>TestClass<!> actual constructor() {}
+class PlatformAYImplTestClass: TestClass()
+
+fun checkCommonAY(t: TestClass): Int = when (t) {
+    is CommonImplTestClass -> 0
+    is CommonAImplTestClass -> 1
+    is PlatformAYImplTestClass -> 2
+}