[JS BE] Fix delegation of suspend method member (KT-23094)

js/js.translator/src/org/jetbrains/kotlin/js/translate/context/TranslationContext.java

@@ -8,11 +8,13 @@ package org.jetbrains.kotlin.js.translate.context;
 import com.intellij.psi.PsiElement;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.kotlin.config.*;
+import org.jetbrains.kotlin.config.CommonConfigurationKeysKt;
+import org.jetbrains.kotlin.config.LanguageFeature;
+import org.jetbrains.kotlin.config.LanguageVersionSettings;
 import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.descriptors.annotations.Annotations;
-import org.jetbrains.kotlin.descriptors.impl.LocalVariableDescriptor;
 import org.jetbrains.kotlin.descriptors.impl.TypeAliasConstructorDescriptor;
+import org.jetbrains.kotlin.descriptors.impl.ValueParameterDescriptorImpl;
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation;
 import org.jetbrains.kotlin.js.backend.ast.*;
 import org.jetbrains.kotlin.js.backend.ast.metadata.MetadataProperties;
@@ -68,7 +70,7 @@ public class TranslationContext {
     @Nullable
     private final ClassDescriptor classDescriptor;
     @Nullable
-    private final VariableDescriptor continuationParameterDescriptor;
+    private final ValueParameterDescriptor continuationParameterDescriptor;
 
     @Nullable
     private InlineFunctionContext inlineFunctionContext;
@@ -115,7 +117,7 @@ public class TranslationContext {
         }
     }
 
-    private VariableDescriptor calculateContinuationParameter() {
+    private ValueParameterDescriptor calculateContinuationParameter() {
         if (parent != null && parent.declarationDescriptor == declarationDescriptor) {
             return parent.continuationParameterDescriptor;
         }
@@ -127,12 +129,10 @@ public class TranslationContext {
                                 getCurrentModule(), NoLookupLocation.FROM_BACKEND,
                                 getLanguageVersionSettings().supportsFeature(LanguageFeature.ReleaseCoroutines));
 
-                return new LocalVariableDescriptor(
-                        declarationDescriptor,
-                        Annotations.Companion.getEMPTY(),
-                        Name.identifier("continuation"),
-                        continuationDescriptor.getDefaultType(),
-                        SourceElement.NO_SOURCE);
+                return new ValueParameterDescriptorImpl(function, null, function.getValueParameters().size(),
+                                                        Annotations.Companion.getEMPTY(), Name.identifier("continuation"),
+                                                        continuationDescriptor.getDefaultType(), false, false, false, null,
+                                                        SourceElement.NO_SOURCE);
             }
         }
         return null;
@@ -858,7 +858,7 @@ public class TranslationContext {
     }
 
     @Nullable
-    public VariableDescriptor getContinuationParameterDescriptor() {
+    public ValueParameterDescriptor getContinuationParameterDescriptor() {
         return continuationParameterDescriptor;
     }
 

js/js.translator/src/org/jetbrains/kotlin/js/translate/declaration/DelegationTranslator.kt

@@ -207,7 +207,7 @@ class DelegationTranslator(
             delegateName: JsName
     ) {
         val delegateRef = JsNameRef(delegateName, JsThisRef())
-        val statement = generateDelegateCall(classDescriptor, descriptor, overriddenDescriptor, delegateRef, context(), true, specifier)
+        val statement = generateDelegateCall(classDescriptor, descriptor, overriddenDescriptor, delegateRef, context().newDeclaration(overriddenDescriptor), true, specifier)
         context().addDeclarationStatement(statement)
     }
 }

js/js.translator/src/org/jetbrains/kotlin/js/translate/utils/TranslationUtils.java

@@ -370,8 +370,8 @@ public final class TranslationUtils {
     }
 
     @NotNull
-    public static VariableDescriptor getEnclosingContinuationParameter(@NotNull TranslationContext context) {
-        VariableDescriptor result = context.getContinuationParameterDescriptor();
+    public static ValueParameterDescriptor getEnclosingContinuationParameter(@NotNull TranslationContext context) {
+        ValueParameterDescriptor result = context.getContinuationParameterDescriptor();
         if (result == null) {
             assert context.getParent() != null;
             result = getEnclosingContinuationParameter(context.getParent());

js/js.translator/src/org/jetbrains/kotlin/js/translate/utils/utils.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.js.translate.utils
 import com.intellij.psi.PsiElement
 import com.intellij.util.SmartList
 import org.jetbrains.kotlin.backend.common.COROUTINE_SUSPENDED_NAME
+import org.jetbrains.kotlin.backend.common.onlyIf
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.config.coroutinesIntrinsicsPackageFqName
@@ -61,7 +62,11 @@ fun generateDelegateCall(
         args.add(JsNameRef(extensionFunctionReceiverName))
     }
 
-    for (param in fromDescriptor.valueParameters) {
+    val valueParameterDescriptors = if (fromDescriptor.isSuspend) {
+        fromDescriptor.valueParameters + context.continuationParameterDescriptor!!
+    } else fromDescriptor.valueParameters
+
+    for (param in valueParameterDescriptors) {
         val paramName = param.name.asString()
         val jsParamName = JsScope.declareTemporaryName(paramName)
         parameters.add(JsParameter(jsParamName))
@@ -80,6 +85,7 @@ fun generateDelegateCall(
     val functionObject = simpleReturnFunction(context.scope(), invocation)
     functionObject.source = source?.finalElement
     functionObject.parameters.addAll(parameters)
+    functionObject.onlyIf(JsFunction::isSuspend) { it.fillCoroutineMetadata(context, fromDescriptor, false) }
 
     val fromFunctionName = fromDescriptor.getNameForFunctionWithPossibleDefaultParam()