Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 325 insertions, 0 deletions

diff --git a/js/src/builtin/Object.js b/js/src/builtin/Object.js
new file mode 100644
index 0000000000..b25c7eb218
--- /dev/null
+++ b/js/src/builtin/Object.js
@@ -0,0 +1,325 @@
+/* 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))
+        ThrowArgTypeNotObject(NOT_OBJECT_KIND_DESCRIPTOR, attributes);
+
+    // 6.2.4.5 ToPropertyDescriptor, step 2.
+    var attrs = 0, hasValue = false;
+    var value, getter = null, 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;
+}
+