rra/ilgonmic/export-call-site

[JS IR] Add test with exported overridden property from interface

[JS IR] Accessors should not be exported when overridden from non-exported interface

Merge-request: KT-MR-6166
Merged-by: Ilya Goncharov <Ilya.Goncharov@jetbrains.com>

^KT-52144 fixed

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/JsClassGenerator.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.ir.backend.js.transformers.irToJs
 import org.jetbrains.kotlin.backend.common.compilationException
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.Modality
+import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
 import org.jetbrains.kotlin.ir.backend.js.export.isAllowedFakeOverriddenDeclaration
 import org.jetbrains.kotlin.ir.backend.js.export.isExported
 import org.jetbrains.kotlin.ir.backend.js.export.isOverriddenExported
@@ -176,7 +177,7 @@ class JsClassGenerator(private val irClass: IrClass, val context: JsGenerationCo
                     //     });
 
                     val getterForwarder = property.getter
-                        .takeIf { it.shouldExportAccessor() }
+                        .takeIf { it.shouldExportAccessor(context.staticContext.backendContext) }
                         .getOrGenerateIfFinal {
                             propertyAccessorForwarder("getter forwarder") {
                                 JsReturn(JsInvocation(it))
@@ -184,7 +185,7 @@ class JsClassGenerator(private val irClass: IrClass, val context: JsGenerationCo
                         }
 
                     val setterForwarder = property.setter
-                        .takeIf { it.shouldExportAccessor() }
+                        .takeIf { it.shouldExportAccessor(context.staticContext.backendContext) }
                         .getOrGenerateIfFinal {
                             val setterArgName = JsName("value", false)
                             propertyAccessorForwarder("setter forwarder") {
@@ -219,20 +220,6 @@ class JsClassGenerator(private val irClass: IrClass, val context: JsGenerationCo
                 overriddenSymbols.any { it.owner.isDefinedInsideExportedInterface() }
     }
 
-    private fun IrSimpleFunction?.shouldExportAccessor(): Boolean {
-        if (this == null) return false
-
-        if (parentAsClass.isExported(context.staticContext.backendContext)) return true
-
-        val property = correspondingPropertySymbol!!.owner
-
-        if (property.isOverriddenExported(context.staticContext.backendContext)) {
-            return isOverriddenExported(context.staticContext.backendContext)
-        }
-
-        return overridesExternal() || property.getJsName() != null
-    }
-
     private fun IrSimpleFunction.accessorRef(): JsNameRef? =
         when (visibility) {
             DescriptorVisibilities.PRIVATE -> null
@@ -260,12 +247,6 @@ class JsClassGenerator(private val irClass: IrClass, val context: JsGenerationCo
         return jsElementAccess(name.asString(), classPrototypeRef)
     }
 
-    private fun IrSimpleFunction.overridesExternal(): Boolean {
-        if (this.isEffectivelyExternal()) return true
-
-        return this.overriddenSymbols.any { it.owner.overridesExternal() }
-    }
-
     private fun IrClass.shouldCopyFrom(): Boolean {
         return isInterface && !isEffectivelyExternal()
     }
@@ -430,6 +411,30 @@ class JsClassGenerator(private val irClass: IrClass, val context: JsGenerationCo
     }
 }
 
+fun IrSimpleFunction?.shouldExportAccessor(context: JsIrBackendContext): Boolean {
+    if (this == null) return false
+
+    if (parentAsClass.isExported(context)) return true
+
+    return overriddenStableProperty(context)
+}
+
+fun IrSimpleFunction.overriddenStableProperty(context: JsIrBackendContext): Boolean {
+    val property = correspondingPropertySymbol!!.owner
+
+    if (property.isOverriddenExported(context)) {
+        return isOverriddenExported(context)
+    }
+
+    return overridesExternal() || property.getJsName() != null
+}
+
+private fun IrSimpleFunction.overridesExternal(): Boolean {
+    if (this.isEffectivelyExternal()) return true
+
+    return this.overriddenSymbols.any { it.owner.overridesExternal() }
+}
+
 private val IrClassifierSymbol.isInterface get() = (owner as? IrClass)?.isInterface == true
 private val IrClassifierSymbol.isEffectivelyExternal get() = (owner as? IrDeclaration)?.isEffectivelyExternal() == true
 

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/jsAstUtils.kt

@@ -126,18 +126,20 @@ fun translateCall(
             property != null &&
             (property.isEffectivelyExternal() || property.isExportedMember(context.staticContext.backendContext))
         ) {
-            val propertyName = context.getNameForProperty(property)
-            val nameRef = when (jsDispatchReceiver) {
-                null -> JsNameRef(propertyName)
-                else -> jsElementAccess(propertyName.ident, jsDispatchReceiver)
-            }
-            return when (function) {
-                property.getter -> nameRef
-                property.setter -> jsAssignment(nameRef, arguments.single())
-                else -> compilationException(
-                    "Function must be an accessor of corresponding property",
-                    function
-                )
+            if (function.overriddenSymbols.isEmpty() || function.overriddenStableProperty(context.staticContext.backendContext)) {
+                val propertyName = context.getNameForProperty(property)
+                val nameRef = when (jsDispatchReceiver) {
+                    null -> JsNameRef(propertyName)
+                    else -> jsElementAccess(propertyName.ident, jsDispatchReceiver)
+                }
+                return when (function) {
+                    property.getter -> nameRef
+                    property.setter -> jsAssignment(nameRef, arguments.single())
+                    else -> compilationException(
+                        "Function must be an accessor of corresponding property",
+                        function
+                    )
+                }
             }
         }
     }

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrBoxJsTestGenerated.java

@@ -2568,6 +2568,12 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/export/overriddenExternalMethodWithSameStableNameMethod.kt");
         }
 
+        @Test
+        @TestMetadata("overriddenPropertyFromInterface.kt")
+        public void testOverriddenPropertyFromInterface() throws Exception {
+            runTest("js/js.translator/testData/box/export/overriddenPropertyFromInterface.kt");
+        }
+
         @Test
         @TestMetadata("overridenMethod.kt")
         public void testOverridenMethod() throws Exception {

js/js.translator/testData/box/export/overriddenPropertyFromInterface.kt

@@ -0,0 +1,30 @@
+// TARGET_BACKEND: JS_IR
+
+interface Foo {
+    val foo: String
+
+    val foo2: String
+
+    var foo3: String
+}
+
+@JsExport
+class Bar : Foo {
+    override val foo: String
+        get() = "foo"
+
+    override val foo2: String = "foo2"
+
+    override var foo3: String = "foo3"
+}
+
+fun box(): String {
+    val bar = Bar()
+    if (bar.foo != "foo") return "fail 1"
+    if (bar.foo2 != "foo2") return "fail 2"
+    if (bar.foo3 != "foo3") return "fail 3"
+    bar.foo3 = "foo4"
+    if (bar.foo3 != "foo4") return "fail 4"
+
+    return "OK"
+}