| // Copyright 2019 the V8 project authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style license that can be | |
| // found in the LICENSE file. | |
| namespace runtime { | |
| extern runtime ArrayIsArray(implicit context: Context)(JSAny): JSAny; | |
| } // namespace runtime | |
| namespace array { | |
| // ES #sec-array.isarray | |
| javascript builtin ArrayIsArray(js-implicit context: NativeContext)(arg: JSAny): | |
| JSAny { | |
| // 1. Return ? IsArray(arg). | |
| typeswitch (arg) { | |
| case (JSArray): { | |
| return True; | |
| } | |
| case (JSProxy): { | |
| // TODO(verwaest): Handle proxies in-place | |
| return runtime::ArrayIsArray(arg); | |
| } | |
| case (JSAny): { | |
| return False; | |
| } | |
| } | |
| } | |
| } // namespace array |