[KMP] Allow matching expect ctorless final classes to objects

both directly and via typealias.

This is a possible fix to KT-59747

compiler/testData/codegen/box/multiplatform/complexMatchings/expectCtorlessFinalToActualObject.kt

@@ -0,0 +1,42 @@
+// LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND_K2: ANY
+// FIR status: expect/actual in the same module
+//   also used as a workaround for no multi-module support in K1 box tests
+
+// FILE: common.kt
+
+expect class TestResult
+
+expect fun createTestResult(): TestResult
+
+fun commonBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "c01"
+    if (tr.hashCode() != tr2.hashCode()) return "c02"
+    if (tr.toString() != tr2.toString()) return "c03"
+
+    return "O"
+}
+
+// FILE: actual.kt
+
+actual object TestResult {
+    fun doTest(): TestResult = this
+}
+
+actual fun createTestResult(): TestResult = TestResult
+
+fun platformBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "p01"
+    if (tr.hashCode() != tr2.hashCode()) return "p02"
+    if (tr.toString() != tr2.toString()) return "p03"
+
+    return "K"
+}
+
+fun box() = commonBox() + platformBox()

compiler/testData/codegen/box/multiplatform/complexMatchings/expectCtorlessFinalToActualPromiseOfUnit.kt

@@ -0,0 +1,48 @@
+// LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND_K2: ANY
+// FIR status: expect/actual in the same module
+//   also used as a workaround for no multi-module support in K1 box tests
+// TARGET_BACKEND: JS, JS_IR, JS_IR_ES6
+// WITH_STDLIB
+
+// FILE: common.kt
+
+expect class TestResult
+
+expect fun createTestResult(): TestResult
+
+fun commonBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "c01"
+    if (tr.hashCode() != tr2.hashCode()) return "c02"
+    if (tr.toString() != tr2.toString()) return "c03"
+
+    return "O"
+}
+
+// FILE: js.kt
+
+import kotlin.js.Promise
+
+class PromiseOfUnit(executor: (resolve: (Unit) -> Unit, reject: (Throwable) -> Unit) -> Unit) : Promise<Unit>(executor)
+
+actual typealias TestResult = PromiseOfUnit
+
+actual fun createTestResult(): TestResult = PromiseOfUnit {
+    resolve, reject ->
+}
+
+fun platformBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "p01"
+    if (tr.hashCode() != tr2.hashCode()) return "p02"
+    if (tr.toString() != tr2.toString()) return "p03"
+
+    return "K"
+}
+
+fun box() = commonBox() + platformBox()

compiler/testData/codegen/box/multiplatform/complexMatchings/expectCtorlessFinalToActualUnit.kt

@@ -0,0 +1,40 @@
+// LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND_K2: ANY
+// FIR status: expect/actual in the same module
+//   also used as a workaround for no multi-module support in K1 box tests
+
+// FILE: common.kt
+
+expect class TestResult
+
+expect fun createTestResult(): TestResult
+
+fun commonBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "c01"
+    if (tr.hashCode() != tr2.hashCode()) return "c02"
+    if (tr.toString() != tr2.toString()) return "c03"
+
+    return "O"
+}
+
+// FILE: actual.kt
+
+actual typealias TestResult = Unit
+
+actual fun createTestResult(): TestResult = TestResult
+
+fun platformBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "p01"
+    if (tr.hashCode() != tr2.hashCode()) return "p02"
+    if (tr.toString() != tr2.toString()) return "p03"
+
+    return "K"
+}
+
+fun box() = commonBox() + platformBox()

compiler/testData/codegen/box/multiplatform/k2/complexMatchings/expectCtorlessFinalToActualObject.kt

@@ -0,0 +1,42 @@
+// LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND_K1: ANY
+
+// MODULE: common
+// FILE: common.kt
+
+expect class TestResult
+
+expect fun createTestResult(): TestResult
+
+fun commonBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "c01"
+    if (tr.hashCode() != tr2.hashCode()) return "c02"
+    if (tr.toString() != tr2.toString()) return "c03"
+
+    return "O"
+}
+
+// MODULE: actual()()(common)
+// FILE: actual.kt
+
+actual object TestResult {
+    fun doTest(): TestResult = this
+}
+
+actual fun createTestResult(): TestResult = TestResult
+
+fun platformBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "p01"
+    if (tr.hashCode() != tr2.hashCode()) return "p02"
+    if (tr.toString() != tr2.toString()) return "p03"
+
+    return "K"
+}
+
+fun box() = commonBox() + platformBox()

compiler/testData/codegen/box/multiplatform/k2/complexMatchings/expectCtorlessFinalToActualPromiseOfUnit.kt

@@ -0,0 +1,48 @@
+// LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND_K1: ANY
+// TARGET_BACKEND: JS, JS_IR, JS_IR_ES6
+// WITH_STDLIB
+
+// MODULE: common
+// FILE: common.kt
+
+expect class TestResult
+
+expect fun createTestResult(): TestResult
+
+fun commonBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "c01"
+    if (tr.hashCode() != tr2.hashCode()) return "c02"
+    if (tr.toString() != tr2.toString()) return "c03"
+
+    return "O"
+}
+
+// MODULE: js()()(common)
+// FILE: js.kt
+
+import kotlin.js.Promise
+
+class PromiseOfUnit(executor: (resolve: (Unit) -> Unit, reject: (Throwable) -> Unit) -> Unit) : Promise<Unit>(executor)
+
+actual typealias TestResult = PromiseOfUnit
+
+actual fun createTestResult(): TestResult = PromiseOfUnit {
+    resolve, reject ->
+}
+
+fun platformBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "p01"
+    if (tr.hashCode() != tr2.hashCode()) return "p02"
+    if (tr.toString() != tr2.toString()) return "p03"
+
+    return "K"
+}
+
+fun box() = commonBox() + platformBox()

compiler/testData/codegen/box/multiplatform/k2/complexMatchings/expectCtorlessFinalToActualUnit.kt

@@ -0,0 +1,40 @@
+// LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND_K1: ANY
+
+// MODULE: common
+// FILE: common.kt
+
+expect class TestResult
+
+expect fun createTestResult(): TestResult
+
+fun commonBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "c01"
+    if (tr.hashCode() != tr2.hashCode()) return "c02"
+    if (tr.toString() != tr2.toString()) return "c03"
+
+    return "O"
+}
+
+// MODULE: actual()()(common)
+// FILE: actual.kt
+
+actual typealias TestResult = Unit
+
+actual fun createTestResult(): TestResult = TestResult
+
+fun platformBox(): String {
+    val tr = createTestResult()
+    val tr2 = if (true) tr else createTestResult()
+
+    if (tr != tr2) return "p01"
+    if (tr.hashCode() != tr2.hashCode()) return "p02"
+    if (tr.toString() != tr2.toString()) return "p03"
+
+    return "K"
+}
+
+fun box() = commonBox() + platformBox()