JS backend: fix translation for extension property

js/js.translator/src/org/jetbrains/k2js/translate/callTranslator/CallInfoExtensions.kt

@@ -45,6 +45,8 @@ import org.jetbrains.jet.lang.resolve.calls.tasks.ExplicitReceiverKind.*
 import com.google.dart.compiler.backend.js.ast.JsLiteral
 import org.jetbrains.k2js.translate.utils.TranslationUtils
 import org.jetbrains.k2js.translate.context.TranslationContext
+import org.jetbrains.jet.lang.descriptors.PropertyDescriptor
+import org.jetbrains.jet.lang.resolve.descriptorUtil.isExtension
 
 
 val CallInfo.callableDescriptor: CallableDescriptor
@@ -58,7 +60,7 @@ fun CallInfo.isNative(): Boolean = AnnotationsUtils.isNativeObject(callableDescr
 
 fun CallInfo.isSuperInvocation(): Boolean {
     val dispatchReceiver = resolvedCall.getDispatchReceiver()
-    return dispatchReceiver is ExpressionReceiver && ((dispatchReceiver as ExpressionReceiver)).getExpression() is JetSuperExpression
+    return dispatchReceiver is ExpressionReceiver && dispatchReceiver.getExpression() is JetSuperExpression
 }
 
 val VariableAccessInfo.variableDescriptor: VariableDescriptor
@@ -69,7 +71,16 @@ val VariableAccessInfo.variableName: JsName
 
 fun VariableAccessInfo.isGetAccess(): Boolean = value == null
 
-fun VariableAccessInfo.getAccessFunctionName(): String = Namer.getNameForAccessor(variableName.getIdent()!!, isGetAccess(), false)
+fun VariableAccessInfo.getAccessFunctionName(): String {
+    val descriptor = variableDescriptor
+    if (descriptor is PropertyDescriptor && descriptor.isExtension) {
+        val propertyAccessorDescriptor = if (isGetAccess()) descriptor.getGetter() else descriptor.getSetter()
+        return context.getNameForDescriptor(propertyAccessorDescriptor).getIdent()
+    }
+    else {
+        return Namer.getNameForAccessor(variableName.getIdent()!!, isGetAccess(), false)
+    }
+}
 
 fun VariableAccessInfo.constructAccessExpression(ref: JsExpression): JsExpression {
     if (isGetAccess()) {

js/js.translator/src/org/jetbrains/k2js/translate/context/StaticContext.java

@@ -290,14 +290,11 @@ public final class StaticContext {
                         }
                         return declarePropertyOrPropertyAccessorName(descriptor, propertyName, false);
                     } else {
-                        if (descriptor instanceof PropertyDescriptor) {
-                            return declarePropertyOrPropertyAccessorName(descriptor, propertyName, false);
-                        } else {
-                            String propertyJsName = getNameForDescriptor(propertyDescriptor).getIdent();
-                            boolean isGetter = descriptor instanceof PropertyGetterDescriptor;
-                            String accessorName = Namer.getNameForAccessor(propertyJsName, isGetter, false);
-                            return declarePropertyOrPropertyAccessorName(descriptor, accessorName, false);
-                        }
+                        assert !(descriptor instanceof PropertyDescriptor) : "descriptor should not be instance of PropertyDescriptor: " + descriptor;
+
+                        boolean isGetter = descriptor instanceof PropertyGetterDescriptor;
+                        String accessorName = Namer.getNameForAccessor(propertyName, isGetter, false);
+                        return declarePropertyOrPropertyAccessorName(descriptor, accessorName, false);
                     }
                 }
             };

js/js.translator/src/org/jetbrains/k2js/translate/declaration/PropertyTranslator.kt

@@ -33,6 +33,7 @@ import org.jetbrains.k2js.translate.utils.ast.*
 import org.jetbrains.k2js.translate.utils.TranslationUtils.*
 import org.jetbrains.jet.lang.resolve.DescriptorUtils.isExtension
 import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall
+import org.jetbrains.jet.lang.resolve.descriptorUtil.isExtension
 
 /**
  * Translates single property /w accessors.
@@ -120,6 +121,7 @@ private class PropertyTranslator(
             return generateDelegatedGetterFunction(getterDescriptor, delegatedCall)
         }
 
+        assert(!descriptor.isExtension, "Unexpected extension property $descriptor}")
         val scope = context().getScopeForDescriptor(getterDescriptor.getContainingDeclaration())
         val result = backingFieldReference(context(), descriptor)
         val body = JsBlock(JsReturn(result))
@@ -172,6 +174,7 @@ private class PropertyTranslator(
                 (delegatedJsCall as JsInvocation).getArguments().set(0, receiver.makeRef())
             }
         } else {
+            assert(!descriptor.isExtension, "Unexpected extension property $descriptor}")
             val assignment = assignmentToBackingField(withAliased, descriptor, valueParameter.makeRef())
             function.addStatement(assignment.makeStmt())
         }