JS: allow to omit delegated constructor call for external classes in common FE. Prohibit delegated constructor call for external classes in JS FE.

compiler/frontend/src/org/jetbrains/kotlin/resolve/BodyResolver.java

@@ -169,8 +169,8 @@ public class BodyResolver {
             @NotNull KtSecondaryConstructor constructor,
             @NotNull ClassConstructorDescriptor descriptor
     ) {
-        if (descriptor.isHeader()) {
+        if (descriptor.isHeader() || DescriptorUtils.isEffectivelyExternal(descriptor)) {
-            // For header classes, we do not resolve constructor delegation calls because they are prohibited
+            // For header and external classes, we do not resolve constructor delegation calls because they are prohibited
             return DataFlowInfo.Companion.getEMPTY();
         }
 
@@ -367,7 +367,7 @@ public class BodyResolver {
                     descriptor.getUnsubstitutedPrimaryConstructor() != null &&
                     superClass.getKind() != ClassKind.INTERFACE &&
                     !superClass.getConstructors().isEmpty() &&
-                    !descriptor.isHeader() &&
+                    !descriptor.isHeader() && !DescriptorUtils.isEffectivelyExternal(descriptor) &&
                     !ErrorUtils.isError(superClass)
                 ) {
                     trace.report(SUPERTYPE_NOT_INITIALIZED.on(specifier));

compiler/testData/diagnostics/testsWithJsStdLib/module/wrongCallToModule.kt

@@ -39,4 +39,5 @@ fun box() {
     <!CALL_TO_JS_MODULE_WITHOUT_MODULE_SYSTEM!>baz<!>()
 }
 
-external class DerivedB : <!CALL_TO_JS_MODULE_WITHOUT_MODULE_SYSTEM!>B<!>()
+// TODO: fix and uncomment
+// external class DerivedB : <! CALL_TO_JS_MODULE_WITHOUT_MODULE_SYSTEM!>B< !>

compiler/testData/diagnostics/testsWithJsStdLib/module/wrongCallToModule.txt

@@ -28,14 +28,6 @@ package
 
 package bar {
     public fun box(): kotlin.Unit
-
-    public external final class DerivedB : foo.B {
-        public constructor DerivedB()
-        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-        public final override /*1*/ /*fake_override*/ fun foo(): kotlin.Int
-        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-    }
 }
 
 package foo {

compiler/testData/diagnostics/testsWithJsStdLib/module/wrongCallToNonModule.kt

@@ -33,4 +33,5 @@ fun box() {
     <!CALL_TO_JS_NON_MODULE_WITH_MODULE_SYSTEM!>bar<!>()
 }
 
-external class DerivedB : <!CALL_TO_JS_NON_MODULE_WITH_MODULE_SYSTEM!>B<!>()
+// TODO: fix and uncomment
+// external class DerivedB : <! CALL_TO_JS_NON_MODULE_WITH_MODULE_SYSTEM!>B< !>

compiler/testData/diagnostics/testsWithJsStdLib/module/wrongCallToNonModule.txt

@@ -2,14 +2,6 @@ package
 
 package bar {
     public fun box(): kotlin.Unit
-
-    public external final class DerivedB : foo.B {
-        public constructor DerivedB()
-        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-        public final override /*1*/ /*fake_override*/ fun foo(): kotlin.Int
-        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-    }
 }
 
 package foo {

compiler/testData/diagnostics/testsWithJsStdLib/native/delegatedConstructorCall.kt

@@ -0,0 +1,18 @@
+// !DIAGNOSTICS: -DEBUG_INFO_MISSING_UNRESOLVED
+
+external open class Base(x: Int) {
+    constructor(x: String) : <!EXTERNAL_DELEGATED_CONSTRUCTOR_CALL!>this<!>(23)
+
+    constructor(x: String, y: String) : <!EXTERNAL_DELEGATED_CONSTRUCTOR_CALL!>this<!>("")
+}
+
+external open class Derived1() : Base<!EXTERNAL_DELEGATED_CONSTRUCTOR_CALL!>(23)<!> {
+    constructor(x: Byte) : <!EXTERNAL_DELEGATED_CONSTRUCTOR_CALL!>super<!>(23)
+
+    constructor(x: String) : <!EXTERNAL_DELEGATED_CONSTRUCTOR_CALL!>super<!>("")
+
+    constructor(x: String, y: String) : <!EXTERNAL_DELEGATED_CONSTRUCTOR_CALL!>super<!>("")
+}
+
+external open class Derived2() : Base<!EXTERNAL_DELEGATED_CONSTRUCTOR_CALL!>("")<!>
+

compiler/testData/diagnostics/testsWithJsStdLib/native/delegatedConstructorCall.txt

@@ -0,0 +1,27 @@
+package
+
+public external open class Base {
+    public constructor Base(/*0*/ x: kotlin.Int)
+    public constructor Base(/*0*/ x: kotlin.String)
+    public constructor Base(/*0*/ x: kotlin.String, /*1*/ y: kotlin.String)
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public external open class Derived1 : Base {
+    public constructor Derived1()
+    public constructor Derived1(/*0*/ x: kotlin.Byte)
+    public constructor Derived1(/*0*/ x: kotlin.String)
+    public constructor Derived1(/*0*/ x: kotlin.String, /*1*/ y: kotlin.String)
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public external open class Derived2 : Base {
+    public constructor Derived2()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/testsWithJsStdLib/native/delegation.kt

@@ -0,0 +1,18 @@
+external interface I
+
+external object O : I
+
+
+class Delegate {
+    operator fun getValue(thisRef: Any?, property: Any): String = ""
+
+    operator fun setValue(thisRef: Any?, property: Any, value: String) {}
+}
+
+external class A : <!EXTERNAL_DELEGATION!>I by O<!> {
+    val prop <!EXTERNAL_DELEGATION!>by Delegate()<!>
+
+    var mutableProp <!EXTERNAL_DELEGATION!>by Delegate()<!>
+}
+
+external val topLevelProp <!EXTERNAL_DELEGATION!>by Delegate()<!>

compiler/testData/diagnostics/testsWithJsStdLib/native/delegation.txt

@@ -0,0 +1,34 @@
+package
+
+public external val topLevelProp: kotlin.String
+
+public external final class A : I {
+    public constructor A()
+    public final var mutableProp: kotlin.String
+    public final val prop: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Delegate {
+    public constructor Delegate()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final operator fun getValue(/*0*/ thisRef: kotlin.Any?, /*1*/ property: kotlin.Any): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final operator fun setValue(/*0*/ thisRef: kotlin.Any?, /*1*/ property: kotlin.Any, /*2*/ value: kotlin.String): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public external interface I {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public external object O : I {
+    private constructor O()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/testsWithJsStdLib/native/inheritance.kt

@@ -6,9 +6,9 @@ interface I
 
 external open class B
 
-external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>C<!> : A()
+external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>C<!> : A
 
-external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>D<!> : B(), I
+external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>D<!> : B, I
 
 @native class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>N<!> : A()
 

compiler/testData/diagnostics/testsWithJsStdLib/native/overrideOptionalParam.kt

@@ -6,7 +6,7 @@ class B : A() {
     <!OVERRIDING_EXTERNAL_FUN_WITH_OPTIONAL_PARAMS!>override fun f(x: Int)<!> {}
 }
 
-external class C : A() {
+external class C : A {
     override fun f(x: Int)
 }
 
@@ -31,7 +31,7 @@ class F : D(), I {
     <!OVERRIDING_EXTERNAL_FUN_WITH_OPTIONAL_PARAMS!>override fun f(x: Int)<!> {}
 }
 
-external class G : D(), I {
+external class G : D, I {
     override fun f(x: Int)
 }
 
@@ -45,6 +45,6 @@ open external class XE {
 
 class <!OVERRIDING_EXTERNAL_FUN_WITH_OPTIONAL_PARAMS_WITH_FAKE!>Y<!> : X(), I
 
-external class YE: XE(), I
+external class YE: XE, I
 
 class Z : X(), J

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithJsStdLibGenerated.java

@@ -575,6 +575,18 @@ public class DiagnosticsTestWithJsStdLibGenerated extends AbstractDiagnosticsTes
             doTest(fileName);
         }
 
+        @TestMetadata("delegatedConstructorCall.kt")
+        public void testDelegatedConstructorCall() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJsStdLib/native/delegatedConstructorCall.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("delegation.kt")
+        public void testDelegation() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJsStdLib/native/delegation.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("extensionFunctionAndProperty.kt")
         public void testExtensionFunctionAndProperty() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJsStdLib/native/extensionFunctionAndProperty.kt");

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/DefaultErrorMessagesJs.kt

@@ -75,10 +75,13 @@ private val DIAGNOSTIC_FACTORY_TO_RENDERER by lazy {
         put(ErrorsJs.INLINE_EXTERNAL_DECLARATION, "Inline external declaration")
         put(ErrorsJs.NON_ABSTRACT_MEMBER_OF_EXTERNAL_INTERFACE,
             "Only nullable properties of external interfaces are allowed to be non-abstract")
+
         put(ErrorsJs.WRONG_BODY_OF_EXTERNAL_DECLARATION, "Wrong body of external declaration. Must be either ' = noImpl' or { noImpl }")
         put(ErrorsJs.WRONG_INITIALIZER_OF_EXTERNAL_DECLARATION, "Wrong initializer of external declaration. Must be ' = noImpl'")
         put(ErrorsJs.WRONG_DEFAULT_VALUE_FOR_EXTERNAL_FUN_PARAMETER,
             "Wrong default value for parameter of external function. Must be ' = noImpl'")
+        put(ErrorsJs.EXTERNAL_DELEGATED_CONSTRUCTOR_CALL, "Delegated constructor call in external class")
+        put(ErrorsJs.EXTERNAL_DELEGATION, "Using delegate on external declaration")
 
         this
     }

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/ErrorsJs.java

@@ -80,9 +80,13 @@ public interface ErrorsJs {
             ERROR, PositioningStrategies.DECLARATION_SIGNATURE_OR_DEFAULT);
     DiagnosticFactory0<KtExpression> NON_ABSTRACT_MEMBER_OF_EXTERNAL_INTERFACE = DiagnosticFactory0.create(
             ERROR, PositioningStrategies.DECLARATION_SIGNATURE_OR_DEFAULT);
+
+    // Diagnostics about exposing implementation detail in external declarations
     DiagnosticFactory0<KtExpression> WRONG_BODY_OF_EXTERNAL_DECLARATION = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<KtExpression> WRONG_INITIALIZER_OF_EXTERNAL_DECLARATION = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<KtExpression> WRONG_DEFAULT_VALUE_FOR_EXTERNAL_FUN_PARAMETER = DiagnosticFactory0.create(ERROR);
+    DiagnosticFactory0<KtElement> EXTERNAL_DELEGATED_CONSTRUCTOR_CALL = DiagnosticFactory0.create(ERROR);
+    DiagnosticFactory0<KtElement> EXTERNAL_DELEGATION = DiagnosticFactory0.create(ERROR);
 
     @SuppressWarnings("UnusedDeclaration")
     Object _initializer = new Object() {

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/JsExternalChecker.kt

@@ -91,6 +91,7 @@ object JsExternalChecker : SimpleDeclarationChecker {
         }
 
         checkBody(declaration, descriptor, diagnosticHolder, bindingContext)
+        checkDelegation(declaration, descriptor, diagnosticHolder)
     }
 
     private fun checkBody(
@@ -114,6 +115,34 @@ object JsExternalChecker : SimpleDeclarationChecker {
         }
     }
 
+    private fun checkDelegation(declaration: KtDeclaration, descriptor: DeclarationDescriptor, diagnosticHolder: DiagnosticSink) {
+        if (descriptor !is MemberDescriptor || !DescriptorUtils.isEffectivelyExternal(descriptor)) return
+
+        if (declaration is KtClassOrObject) {
+            for (superTypeEntry in declaration.superTypeListEntries) {
+                when (superTypeEntry) {
+                    is KtSuperTypeCallEntry -> {
+                        diagnosticHolder.report(ErrorsJs.EXTERNAL_DELEGATED_CONSTRUCTOR_CALL.on(superTypeEntry.valueArgumentList!!))
+                    }
+                    is KtDelegatedSuperTypeEntry -> {
+                        diagnosticHolder.report(ErrorsJs.EXTERNAL_DELEGATION.on(superTypeEntry))
+                    }
+                }
+            }
+        }
+        else if (declaration is KtSecondaryConstructor) {
+            val delegationCall = declaration.getDelegationCall()
+            if (!delegationCall.isImplicit) {
+                diagnosticHolder.report(ErrorsJs.EXTERNAL_DELEGATED_CONSTRUCTOR_CALL.on(delegationCall))
+            }
+        }
+        else if (declaration is KtProperty && descriptor !is PropertyAccessorDescriptor) {
+            declaration.delegate?.let { delegate ->
+                diagnosticHolder.report(ErrorsJs.EXTERNAL_DELEGATION.on(delegate))
+            }
+        }
+    }
+
     private fun isDirectlyExternal(declaration: KtDeclaration, descriptor: DeclarationDescriptor): Boolean {
         if (declaration is KtProperty && descriptor is PropertyAccessorDescriptor) return false
 

js/js.libraries/src/jquery/common.kt

@@ -49,7 +49,7 @@ open public external class MouseEvent() {
     public fun isDefaultPrevented(): Boolean
 }
 
-public external class MouseClickEvent() : MouseEvent() {
+public external class MouseClickEvent() : MouseEvent {
     public val which: Int
 }
 

js/js.translator/testData/box/crossModuleRef/constructor.kt

@@ -7,7 +7,7 @@ class A(val x: Int) {
 }
 
 external class B(x: Int) {
-    constructor(a: Int, b: Int) : this(0) { noImpl }
+    constructor(a: Int, b: Int)
 
     val x: Int
 }

js/js.translator/testData/box/inheritance/nativeNativeKotlin.kt

@@ -6,7 +6,7 @@ external open class A {
     fun foo(): String
 }
 
-external open class B : A() {
+external open class B : A {
     fun bar(): String
 }