Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 369 insertions, 0 deletions

diff --git a/js/src/builtin/Object.js b/js/src/builtin/Object.js
new file mode 100644
index 0000000000..6193f1125c
--- /dev/null
+++ b/js/src/builtin/Object.js
@@ -0,0 +1,369 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// ES stage 4 proposal
+function ObjectGetOwnPropertyDescriptors(O) {
+  // Step 1.
+  var obj = ToObject(O);
+
+  // Step 2.
+  var keys = std_Reflect_ownKeys(obj);
+
+  // Step 3.
+  var descriptors = {};
+
+  // Step 4.
+  for (var index = 0, len = keys.length; index < len; index++) {
+    var key = keys[index];
+
+    // Steps 4.a-b.
+    var desc = ObjectGetOwnPropertyDescriptor(obj, key);
+
+    // Step 4.c.
+    if (typeof desc !== "undefined") {
+      DefineDataProperty(descriptors, key, desc);
+    }
+  }
+
+  // Step 5.
+  return descriptors;
+}
+
+/* ES6 draft rev 32 (2015 Feb 2) 19.1.2.9. */
+function ObjectGetPrototypeOf(obj) {
+  return std_Reflect_getPrototypeOf(ToObject(obj));
+}
+
+/* ES6 draft rev 32 (2015 Feb 2) 19.1.2.11. */
+function ObjectIsExtensible(obj) {
+  return IsObject(obj) && std_Reflect_isExtensible(obj);
+}
+
+/* ES2015 19.1.3.5 Object.prototype.toLocaleString */
+function Object_toLocaleString() {
+  // Step 1.
+  var O = this;
+
+  // Step 2.
+  return callContentFunction(O.toString, O);
+}
+
+// ES 2017 draft bb96899bb0d9ef9be08164a26efae2ee5f25e875 19.1.3.7
+function Object_valueOf() {
+  // Step 1.
+  return ToObject(this);
+}
+
+// ES 2018 draft 19.1.3.2
+function Object_hasOwnProperty(V) {
+  // Implement hasOwnProperty as a pseudo function that becomes a JSOp
+  // to easier add an inline cache for this.
+  return hasOwn(V, this);
+}
+
+// ES 2021 draft rev 0b988b7700de675331ac360d164c978d6ea452ec
+// B.2.2.1.1 get Object.prototype.__proto__
+function $ObjectProtoGetter() {
+  return std_Reflect_getPrototypeOf(ToObject(this));
+}
+SetCanonicalName($ObjectProtoGetter, "get __proto__");
+
+// ES 2021 draft rev 0b988b7700de675331ac360d164c978d6ea452ec
+// B.2.2.1.2 set Object.prototype.__proto__
+function $ObjectProtoSetter(proto) {
+  return callFunction(std_Object_setProto, this, proto);
+}
+SetCanonicalName($ObjectProtoSetter, "set __proto__");
+
+// ES7 draft (2016 March 8) B.2.2.3
+function ObjectDefineSetter(name, setter) {
+  // Step 1.
+  var object = ToObject(this);
+
+  // Step 2.
+  if (!IsCallable(setter)) {
+    ThrowTypeError(JSMSG_BAD_GETTER_OR_SETTER, "setter");
+  }
+
+  // Step 4.
+  var key = TO_PROPERTY_KEY(name);
+
+  // Steps 3, 5.
+  DefineProperty(
+    object,
+    key,
+    ACCESSOR_DESCRIPTOR_KIND | ATTR_ENUMERABLE | ATTR_CONFIGURABLE,
+    null,
+    setter,
+    true
+  );
+
+  // Step 6. (implicit)
+}
+
+// ES7 draft (2016 March 8) B.2.2.2
+function ObjectDefineGetter(name, getter) {
+  // Step 1.
+  var object = ToObject(this);
+
+  // Step 2.
+  if (!IsCallable(getter)) {
+    ThrowTypeError(JSMSG_BAD_GETTER_OR_SETTER, "getter");
+  }
+
+  // Step 4.
+  var key = TO_PROPERTY_KEY(name);
+
+  // Steps 3, 5.
+  DefineProperty(
+    object,
+    key,
+    ACCESSOR_DESCRIPTOR_KIND | ATTR_ENUMERABLE | ATTR_CONFIGURABLE,
+    getter,
+    null,
+    true
+  );
+
+  // Step 6. (implicit)
+}
+
+// ES7 draft (2016 March 8) B.2.2.5
+function ObjectLookupSetter(name) {
+  // Step 1.
+  var object = ToObject(this);
+
+  // Step 2.
+  var key = TO_PROPERTY_KEY(name);
+
+  do {
+    // Step 3.a.
+    var desc = GetOwnPropertyDescriptorToArray(object, key);
+
+    // Step 3.b.
+    if (desc) {
+      // Step.b.i.
+      if (desc[PROP_DESC_ATTRS_AND_KIND_INDEX] & ACCESSOR_DESCRIPTOR_KIND) {
+        return desc[PROP_DESC_SETTER_INDEX];
+      }
+
+      // Step.b.i.
+      return undefined;
+    }
+
+    // Step 3.c.
+    object = std_Reflect_getPrototypeOf(object);
+  } while (object !== null);
+
+  // Step 3.d. (implicit)
+}
+
+// ES7 draft (2016 March 8) B.2.2.4
+function ObjectLookupGetter(name) {
+  // Step 1.
+  var object = ToObject(this);
+
+  // Step 2.
+  var key = TO_PROPERTY_KEY(name);
+
+  do {
+    // Step 3.a.
+    var desc = GetOwnPropertyDescriptorToArray(object, key);
+
+    // Step 3.b.
+    if (desc) {
+      // Step.b.i.
+      if (desc[PROP_DESC_ATTRS_AND_KIND_INDEX] & ACCESSOR_DESCRIPTOR_KIND) {
+        return desc[PROP_DESC_GETTER_INDEX];
+      }
+
+      // Step.b.ii.
+      return undefined;
+    }
+
+    // Step 3.c.
+    object = std_Reflect_getPrototypeOf(object);
+  } while (object !== null);
+
+  // Step 3.d. (implicit)
+}
+
+// ES2017 draft rev 6859bb9ccaea9c6ede81d71e5320e3833b92cb3e
+// 19.1.2.6 Object.getOwnPropertyDescriptor ( O, P )
+function ObjectGetOwnPropertyDescriptor(obj, propertyKey) {
+  // Steps 1-3.
+  var desc = GetOwnPropertyDescriptorToArray(obj, propertyKey);
+
+  // Step 4 (Call to 6.2.4.4 FromPropertyDescriptor).
+
+  // 6.2.4.4 FromPropertyDescriptor, step 1.
+  if (!desc) {
+    return undefined;
+  }
+
+  // 6.2.4.4 FromPropertyDescriptor, steps 2-5, 8-11.
+  var attrsAndKind = desc[PROP_DESC_ATTRS_AND_KIND_INDEX];
+  if (attrsAndKind & DATA_DESCRIPTOR_KIND) {
+    return {
+      value: desc[PROP_DESC_VALUE_INDEX],
+      writable: !!(attrsAndKind & ATTR_WRITABLE),
+      enumerable: !!(attrsAndKind & ATTR_ENUMERABLE),
+      configurable: !!(attrsAndKind & ATTR_CONFIGURABLE),
+    };
+  }
+
+  // 6.2.4.4 FromPropertyDescriptor, steps 2-3, 6-11.
+  assert(
+    attrsAndKind & ACCESSOR_DESCRIPTOR_KIND,
+    "expected accessor property descriptor"
+  );
+  return {
+    get: desc[PROP_DESC_GETTER_INDEX],
+    set: desc[PROP_DESC_SETTER_INDEX],
+    enumerable: !!(attrsAndKind & ATTR_ENUMERABLE),
+    configurable: !!(attrsAndKind & ATTR_CONFIGURABLE),
+  };
+}
+
+// ES2017 draft rev 6859bb9ccaea9c6ede81d71e5320e3833b92cb3e
+// 19.1.2.4 Object.defineProperty ( O, P, Attributes )
+// 26.1.3 Reflect.defineProperty ( target, propertyKey, attributes )
+function ObjectOrReflectDefineProperty(obj, propertyKey, attributes, strict) {
+  // Step 1.
+  if (!IsObject(obj)) {
+    ThrowTypeError(JSMSG_OBJECT_REQUIRED, DecompileArg(0, obj));
+  }
+
+  // Step 2.
+  propertyKey = TO_PROPERTY_KEY(propertyKey);
+
+  // Step 3 (Call to 6.2.4.5 ToPropertyDescriptor).
+
+  // 6.2.4.5 ToPropertyDescriptor, step 1.
+  if (!IsObject(attributes)) {
+    ThrowTypeError(
+      JSMSG_OBJECT_REQUIRED_PROP_DESC,
+      DecompileArg(2, attributes)
+    );
+  }
+
+  // 6.2.4.5 ToPropertyDescriptor, step 2.
+  var attrs = 0;
+  var hasValue = false;
+  var value;
+  var getter = null;
+  var setter = null;
+
+  // 6.2.4.5 ToPropertyDescriptor, steps 3-4.
+  if ("enumerable" in attributes) {
+    attrs |= attributes.enumerable ? ATTR_ENUMERABLE : ATTR_NONENUMERABLE;
+  }
+
+  // 6.2.4.5 ToPropertyDescriptor, steps 5-6.
+  if ("configurable" in attributes) {
+    attrs |= attributes.configurable ? ATTR_CONFIGURABLE : ATTR_NONCONFIGURABLE;
+  }
+
+  // 6.2.4.5 ToPropertyDescriptor, steps 7-8.
+  if ("value" in attributes) {
+    attrs |= DATA_DESCRIPTOR_KIND;
+    value = attributes.value;
+    hasValue = true;
+  }
+
+  // 6.2.4.5 ToPropertyDescriptor, steps 9-10.
+  if ("writable" in attributes) {
+    attrs |= DATA_DESCRIPTOR_KIND;
+    attrs |= attributes.writable ? ATTR_WRITABLE : ATTR_NONWRITABLE;
+  }
+
+  // 6.2.4.5 ToPropertyDescriptor, steps 11-12.
+  if ("get" in attributes) {
+    attrs |= ACCESSOR_DESCRIPTOR_KIND;
+    getter = attributes.get;
+    if (!IsCallable(getter) && getter !== undefined) {
+      ThrowTypeError(JSMSG_BAD_GET_SET_FIELD, "get");
+    }
+  }
+
+  // 6.2.4.5 ToPropertyDescriptor, steps 13-14.
+  if ("set" in attributes) {
+    attrs |= ACCESSOR_DESCRIPTOR_KIND;
+    setter = attributes.set;
+    if (!IsCallable(setter) && setter !== undefined) {
+      ThrowTypeError(JSMSG_BAD_GET_SET_FIELD, "set");
+    }
+  }
+
+  if (attrs & ACCESSOR_DESCRIPTOR_KIND) {
+    // 6.2.4.5 ToPropertyDescriptor, step 15.
+    if (attrs & DATA_DESCRIPTOR_KIND) {
+      ThrowTypeError(JSMSG_INVALID_DESCRIPTOR);
+    }
+
+    // Step 4 (accessor descriptor property).
+    return DefineProperty(obj, propertyKey, attrs, getter, setter, strict);
+  }
+
+  // Step 4 (data property descriptor with value).
+  if (hasValue) {
+    // Use the inlinable DefineDataProperty function when possible.
+    if (strict) {
+      if (
+        (attrs & (ATTR_ENUMERABLE | ATTR_CONFIGURABLE | ATTR_WRITABLE)) ===
+        (ATTR_ENUMERABLE | ATTR_CONFIGURABLE | ATTR_WRITABLE)
+      ) {
+        DefineDataProperty(obj, propertyKey, value);
+        return true;
+      }
+    }
+
+    // The fifth argument is set to |null| to mark that |value| is present.
+    return DefineProperty(obj, propertyKey, attrs, value, null, strict);
+  }
+
+  // Step 4 (generic property descriptor or data property without value).
+  return DefineProperty(obj, propertyKey, attrs, undefined, undefined, strict);
+}
+
+// ES2017 draft rev 6859bb9ccaea9c6ede81d71e5320e3833b92cb3e
+// 19.1.2.4 Object.defineProperty ( O, P, Attributes )
+function ObjectDefineProperty(obj, propertyKey, attributes) {
+  // Steps 1-4.
+  if (!ObjectOrReflectDefineProperty(obj, propertyKey, attributes, true)) {
+    // Not standardized yet: https://github.com/tc39/ecma262/pull/688
+    return null;
+  }
+
+  // Step 5.
+  return obj;
+}
+
+// Proposal https://tc39.github.io/proposal-object-from-entries/
+// 1. Object.fromEntries ( iterable )
+function ObjectFromEntries(iter) {
+  // We omit the usual step number comments here because they don't help.
+  // This implementation inlines AddEntriesFromIterator and
+  // CreateDataPropertyOnObject, so it looks more like the polyfill
+  // <https://github.com/tc39/proposal-object-from-entries/blob/master/polyfill.js>
+  // than the spec algorithm.
+  const obj = {};
+
+  for (const pair of allowContentIter(iter)) {
+    if (!IsObject(pair)) {
+      ThrowTypeError(JSMSG_INVALID_MAP_ITERABLE, "Object.fromEntries");
+    }
+    DefineDataProperty(obj, pair[0], pair[1]);
+  }
+
+  return obj;
+}
+
+// Proposal https://github.com/tc39/proposal-accessible-object-hasownproperty
+// 1. Object.hasOwn ( O, P )
+function ObjectHasOwn(O, P) {
+  // Step 1.
+  var obj = ToObject(O);
+  // Step 2-3.
+  return hasOwn(P, obj);
+}