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* Copyright (c) 2017-present, Facebook, Inc.\n * All rights reserved.\n *\n * This source code is licensed under the BSD-style license found in the\n * LICENSE file in the root directory of this source tree. An additional grant\n * of patent rights can be found in the PATENTS file in the same directory.\n */\n\n/* @flow strict-local */\n\nimport type { Realm } from \"../realm.js\";\nimport type { PropertyKeyValue, Descriptor } from \"../types.js\";\nimport { ObjectValue, NumberValue, StringValue, Value, UndefinedValue } from \"./index.js\";\nimport { IsInteger, IsArrayIndex, IsAccessorDescriptor, IsDetachedBuffer, IsPropertyKey } from \"../methods/is.js\";\nimport { OrdinaryGet } from \"../methods/get.js\";\nimport { OrdinaryHasProperty } from \"../methods/has.js\";\nimport { IntegerIndexedElementSet, IntegerIndexedElementGet } from \"../methods/typedarray.js\";\nimport { Properties, To } from \"../singletons.js\";\nimport invariant from \"../invariant.js\";\n\nexport default class IntegerIndexedExotic extends ObjectValue {\n constructor(realm: Realm, intrinsicName?: string) {\n super(realm, realm.intrinsics.ObjectPrototype, intrinsicName);\n }\n\n // ECMA262 9.4.5.1\n $GetOwnProperty(P: PropertyKeyValue): Descriptor | void {\n let O = this;\n\n // 1. Assert: IsPropertyKey(P) is true.\n invariant(IsPropertyKey(this.$Realm, P), \"IsPropertyKey(P) is true\");\n\n // 2. Assert: O is an Object that has a [[ViewedArrayBuffer]] internal slot.\n invariant(O instanceof ObjectValue && O.$ViewedArrayBuffer);\n\n // 3. If Type(P) is String, then\n if (typeof P === \"string\" || P instanceof StringValue) {\n // a. Let numericIndex be ! CanonicalNumericIndexString(P).\n let numericIndex = To.CanonicalNumericIndexString(\n this.$Realm,\n typeof P === \"string\" ? new StringValue(this.$Realm, P) : P\n );\n\n // b. If numericIndex is not undefined, then\n if (numericIndex !== undefined) {\n // i. Let value be ? IntegerIndexedElementGet(O, numericIndex).\n let value = IntegerIndexedElementGet(this.$Realm, O, numericIndex);\n\n // ii. If value is undefined, return undefined.\n if (value instanceof UndefinedValue) return undefined;\n\n // iii. Return a PropertyDescriptor{[[Value]]: value, [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: false}.\n return {\n value: value,\n writable: true,\n enumerable: true,\n configurable: false,\n };\n }\n }\n // 4. Return OrdinaryGetOwnProperty(O, P).\n return Properties.OrdinaryGetOwnProperty(this.$Realm, O, P);\n }\n\n // ECMA262 9.4.5.2\n $HasProperty(P: PropertyKeyValue): boolean {\n let O = this;\n\n // 1. Assert: IsPropertyKey(P) is true.\n invariant(IsPropertyKey(this.$Realm, P), \"IsPropertyKey(P) is true\");\n\n // 2. Assert: O is an Object that has a [[ViewedArrayBuffer]] internal slot.\n invariant(O instanceof ObjectValue && O.$ViewedArrayBuffer);\n\n // 3. If Type(P) is String, then\n if (typeof P === \"string\" || P instanceof StringValue) {\n // a. Let numericIndex be ! CanonicalNumericIndexString(P).\n let numericIndex = To.CanonicalNumericIndexString(\n this.$Realm,\n typeof P === \"string\" ? new StringValue(this.$Realm, P) : P\n );\n\n // b. If numericIndex is not undefined, then\n if (numericIndex !== undefined) {\n // i. Let buffer be O.[[ViewedArrayBuffer]].\n let buffer = O.$ViewedArrayBuffer;\n invariant(buffer);\n\n // ii. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.\n if (IsDetachedBuffer(this.$Realm, buffer) === true) {\n throw this.$Realm.createErrorThrowCompletion(\n this.$Realm.intrinsics.TypeError,\n \"IsDetachedBuffer(buffer) is true\"\n );\n }\n\n // iii. If IsInteger(numericIndex) is false, return false.\n if (IsInteger(this.$Realm, numericIndex) === false) return false;\n\n // iv. If numericIndex = -0, return false.\n if (Object.is(numericIndex, -0)) return false;\n\n // v. If numericIndex < 0, return false.\n if (numericIndex < 0) return false;\n\n // vi. If numericIndex ≥ O.[[ArrayLength]], return false.\n invariant(O.$ArrayLength);\n if (numericIndex >= O.$ArrayLength) return false;\n\n // vii. Return true.\n return true;\n }\n }\n\n // 4. Return ? OrdinaryHasProperty(O, P).\n return OrdinaryHasProperty(this.$Realm, O, P);\n }\n\n // ECMA262 9.4.5.3\n $DefineOwnProperty(P: PropertyKeyValue, Desc: Descriptor): boolean {\n let O = this;\n\n // 1. Assert: IsPropertyKey(P) is true.\n invariant(IsPropertyKey(this.$Realm, P), \"IsPropertyKey(P) is true\");\n\n // 2. Assert: O is an Object that has a [[ViewedArrayBuffer]] internal slot.\n invariant(O instanceof ObjectValue && this.$ViewedArrayBuffer);\n\n // 3. If Type(P) is String, then\n if (typeof P === \"string\" || P instanceof StringValue) {\n // a. Let numericIndex be ! CanonicalNumericIndexString(P).\n let numericIndex = To.CanonicalNumericIndexString(\n this.$Realm,\n typeof P === \"string\" ? new StringValue(this.$Realm, P) : P\n );\n\n // b. If numericIndex is not undefined, then\n if (numericIndex !== undefined) {\n // i. If IsInteger(numericIndex) is false, return false.\n if (IsInteger(this.$Realm, numericIndex) === false) return false;\n\n // ii. If numericIndex = -0, return false.\n if (Object.is(numericIndex, -0)) return false;\n\n // iii. If numericIndex < 0, return false.\n if (numericIndex < 0) return false;\n\n // iv. Let length be O.[[ArrayLength]].\n let length = this.$ArrayLength;\n invariant(typeof length === \"number\");\n\n // v. If numericIndex ≥ length, return false.\n if (numericIndex >= length) return false;\n\n // vi. If IsAccessorDescriptor(Desc) is true, return false.\n if (IsAccessorDescriptor(this.$Realm, Desc) === true) return false;\n\n // vii. If Desc has a [[Configurable]] field and if Desc.[[Configurable]] is true, return false.\n if (Desc.configurable === true) return false;\n\n // viii. If Desc has an [[Enumerable]] field and if Desc.[[Enumerable]] is false, return false.\n if (Desc.enumerable === false) return false;\n\n // ix. If Desc has a [[Writable]] field and if Desc.[[Writable]] is false, return false.\n if (Desc.writable === false) return false;\n\n // x. If Desc has a [[Value]] field, then\n if (Desc.value) {\n // 1. Let value be Desc.[[Value]].\n let value = Desc.value;\n invariant(value === undefined || value instanceof Value);\n\n // 2. Return ? IntegerIndexedElementSet(O, numericIndex, value).\n return IntegerIndexedElementSet(this.$Realm, O, numericIndex, value);\n }\n\n // xi. Return true.\n return true;\n }\n }\n\n // 4. Return ! OrdinaryDefineOwnProperty(O, P, Desc).\n return Properties.OrdinaryDefineOwnProperty(this.$Realm, O, P, Desc);\n }\n\n // ECMA262 9.4.5.4\n $Get(P: PropertyKeyValue, Receiver: Value): Value {\n let O = this;\n\n // 1. Assert: IsPropertyKey(P) is true.\n invariant(IsPropertyKey(this.$Realm, P), \"IsPropertyKey(P) is true\");\n\n // 2. If Type(P) is String, then\n if (typeof P === \"string\" || P instanceof StringValue) {\n // a. Let numericIndex be ! CanonicalNumericIndexString(P).\n let numericIndex = To.CanonicalNumericIndexString(\n this.$Realm,\n typeof P === \"string\" ? new StringValue(this.$Realm, P) : P\n );\n\n // b. If numericIndex is not undefined, then\n if (numericIndex !== undefined) {\n // i. Return ? IntegerIndexedElementGet(O, numericIndex).\n return IntegerIndexedElementGet(this.$Realm, O, numericIndex);\n }\n }\n\n // 3. Return ? OrdinaryGet(O, P, Receiver).\n return OrdinaryGet(this.$Realm, O, P, Receiver);\n }\n\n // ECMA262 9.4.5.5\n $Set(P: PropertyKeyValue, V: Value, Receiver: Value): boolean {\n let O = this;\n\n // 1. Assert: IsPropertyKey(P) is true.\n invariant(IsPropertyKey(this.$Realm, P), \"IsPropertyKey(P) is true\");\n\n // 2. If Type(P) is String, then\n if (typeof P === \"string\" || P instanceof StringValue) {\n // a. Let numericIndex be ! CanonicalNumericIndexString(P).\n let numericIndex = To.CanonicalNumericIndexString(\n this.$Realm,\n typeof P === \"string\" ? new StringValue(this.$Realm, P) : P\n );\n\n // b. If numericIndex is not undefined, then\n if (numericIndex !== undefined) {\n // i. Return ? IntegerIndexedElementSet(O, numericIndex, V).\n return IntegerIndexedElementSet(this.$Realm, O, numericIndex, V);\n }\n }\n\n // 3. Return ? OrdinarySet(O, P, V, Receiver).\n return Properties.OrdinarySet(this.$Realm, O, P, V, Receiver);\n }\n\n // ECMA262 9.4.5.6\n $OwnPropertyKeys(): Array<PropertyKeyValue> {\n let O = this;\n\n // 1. Let keys be a new empty List.\n let keys = [];\n\n // 2. Assert: O is an Object that has [[ViewedArrayBuffer]], [[ArrayLength]], [[ByteOffset]], and [[TypedArrayName]] internal slots.\n invariant(\n O instanceof ObjectValue &&\n O.$ViewedArrayBuffer &&\n O.$ArrayLength !== undefined &&\n O.$ByteOffset !== undefined &&\n O.$TypedArrayName\n );\n\n // 3. Let len be O.[[ArrayLength]].\n let len = O.$ArrayLength;\n invariant(typeof len === \"number\");\n\n // 4. For each integer i starting with 0 such that i < len, in ascending order,\n for (let i = 0; i < len; ++i) {\n // a. Add ! ToString(i) as the last element of keys.\n keys.push(new StringValue(this.$Realm, To.ToString(this.$Realm, new NumberValue(this.$Realm, i))));\n }\n\n // 5. For each own property key P of O such that Type(P) is String and P is not an integer index, in ascending chronological order of property creation\n let properties = O.getOwnPropertyKeysArray();\n for (let key of properties.filter(x => !IsArrayIndex(this.$Realm, x))) {\n // i. Add P as the last element of keys.\n keys.push(new StringValue(this.$Realm, key));\n }\n\n // 6. For each own property key P of O such that Type(P) is Symbol, in ascending chronological order of property creation\n for (let key of O.symbols.keys()) {\n // a. Add P as the last element of keys.\n keys.push(key);\n }\n\n // 7. Return keys.\n return keys;\n }\n}\n"],"file":"IntegerIndexedExotic.js"} |