v6

node_modules/es-abstract/es2017.js

@@ -0,0 +1,71 @@
+'use strict';
+
+var GetIntrinsic = require('./GetIntrinsic');
+
+var ES2016 = require('./es2016');
+var assign = require('./helpers/assign');
+var forEach = require('./helpers/forEach');
+var callBind = require('./helpers/callBind');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+var $Array = GetIntrinsic('%Array%');
+var $isEnumerable = callBind(GetIntrinsic('%ObjectPrototype%').propertyIsEnumerable);
+var $pushApply = callBind.apply(GetIntrinsic('%ArrayPrototype%').push);
+var $arrayPush = callBind($Array.prototype.push);
+
+var ES2017 = assign(assign({}, ES2016), {
+	ToIndex: function ToIndex(value) {
+		if (typeof value === 'undefined') {
+			return 0;
+		}
+		var integerIndex = this.ToInteger(value);
+		if (integerIndex < 0) {
+			throw new RangeError('index must be >= 0');
+		}
+		var index = this.ToLength(integerIndex);
+		if (!this.SameValueZero(integerIndex, index)) {
+			throw new RangeError('index must be >= 0 and < 2 ** 53 - 1');
+		}
+		return index;
+	},
+
+	// https://www.ecma-international.org/ecma-262/8.0/#sec-enumerableownproperties
+	EnumerableOwnProperties: function EnumerableOwnProperties(O, kind) {
+		var keys = ES2016.EnumerableOwnNames(O);
+		if (kind === 'key') {
+			return keys;
+		}
+		if (kind === 'value' || kind === 'key+value') {
+			var results = [];
+			forEach(keys, function (key) {
+				if ($isEnumerable(O, key)) {
+					$pushApply(results, [
+						kind === 'value' ? O[key] : [key, O[key]]
+					]);
+				}
+			});
+			return results;
+		}
+		throw new $TypeError('Assertion failed: "kind" is not "key", "value", or "key+value": ' + kind);
+	},
+
+	// https://www.ecma-international.org/ecma-262/8.0/#sec-iterabletolist
+	IterableToList: function IterableToList(items, method) {
+		var iterator = this.GetIterator(items, method);
+		var values = [];
+		var next = true;
+		while (next) {
+			next = this.IteratorStep(iterator);
+			if (next) {
+				var nextValue = this.IteratorValue(next);
+				$arrayPush(values, nextValue);
+			}
+		}
+		return values;
+	}
+});
+
+delete ES2017.EnumerableOwnNames; // replaced with EnumerableOwnProperties
+delete ES2017.IterableToArrayLike; // replaced with IterableToList
+
+module.exports = ES2017;