Update DummyArrayIteratorPrototype

petamoriken · Jan 8, 2022 · 7d27b1c · 7d27b1c
1 parent 1146765
commit 7d27b1c
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Showing 2 changed files with 15 additions and 7 deletions.
diff --git a/src/_util/arrayIterator.mjs b/src/_util/arrayIterator.mjs
@@ -1,13 +1,16 @@
 import {
+  ArrayIteratorPrototype,
   ArrayIteratorPrototypeNext,
   ArrayPrototypeSymbolIterator,
   GeneratorPrototypeNext,
   IteratorPrototype,
   NativeArrayPrototypeSymbolIterator,
   NativeWeakMap,
   ObjectCreate,
+  ObjectDefineProperty,
+  ReflectGetOwnPropertyDescriptor,
+  ReflectOwnKeys,
   SymbolIterator,
-  SymbolToStringTag,
   WeakMapPrototypeGet,
   WeakMapPrototypeSet,
 } from "./primordials.mjs";
@@ -51,13 +54,18 @@ const DummyArrayIteratorPrototype = ObjectCreate(IteratorPrototype, {
     writable: true,
     configurable: true,
   },
-
-  [SymbolToStringTag]: {
-    value: "Array Iterator",
-    configurable: true,
-  },
 });
 
+for (const key of ReflectOwnKeys(ArrayIteratorPrototype)) {
+  // next method has already defined
+  if (key === "next") {
+    continue;
+  }
+
+  // Copy ArrayIteratorPrototype descriptors to DummyArrayIteratorPrototype
+  ObjectDefineProperty(DummyArrayIteratorPrototype, key, ReflectGetOwnPropertyDescriptor(ArrayIteratorPrototype, key));
+}
+
 /** @type {<T>(generator: Generator<T>) => IterableIterator<T>} */
 export function wrapGenerator(generator) {
   const dummy = ObjectCreate(DummyArrayIteratorPrototype);

diff --git a/src/_util/primordials.mjs b/src/_util/primordials.mjs
@@ -170,7 +170,7 @@ export const NativeFloat32Array = Float32Array;
 
 // ArrayIterator
 /** @type {any} */
-const ArrayIteratorPrototype = ReflectGetPrototypeOf([][SymbolIterator]());
+export const ArrayIteratorPrototype = ReflectGetPrototypeOf([][SymbolIterator]());
 /** @type {<T>(arrayIterator: IterableIterator<T>) => IteratorResult<T>} */
 export const ArrayIteratorPrototypeNext = uncurryThis(ArrayIteratorPrototype.next);