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node_modules/es-abstract/2016/IterableToArrayLike.js

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+'use strict';
+
+var callBound = require('../helpers/callBound');
+var $arrayPush = callBound('Array.prototype.push');
+
+var getIteratorMethod = require('../helpers/getIteratorMethod');
+var AdvanceStringIndex = require('./AdvanceStringIndex');
+var GetIterator = require('./GetIterator');
+var GetMethod = require('./GetMethod');
+var IsArray = require('./IsArray');
+var IteratorStep = require('./IteratorStep');
+var IteratorValue = require('./IteratorValue');
+var ToObject = require('./ToObject');
+var Type = require('./Type');
+var ES = {
+	AdvanceStringIndex: AdvanceStringIndex,
+	GetMethod: GetMethod,
+	IsArray: IsArray,
+	Type: Type
+};
+
+// https://www.ecma-international.org/ecma-262/7.0/#sec-iterabletoarraylike
+/**
+ * 1. Let usingIterator be ? GetMethod(items, @@iterator).
+ * 2. If usingIterator is not undefined, then
+ *    1. Let iterator be ? GetIterator(items, usingIterator).
+ *    2. Let values be a new empty List.
+ *    3. Let next be true.
+ *    4. Repeat, while next is not false
+ *       1. Let next be ? IteratorStep(iterator).
+ *       2. If next is not false, then
+ *          1. Let nextValue be ? IteratorValue(next).
+ *          2. Append nextValue to the end of the List values.
+ *    5. Return CreateArrayFromList(values).
+ * 3. NOTE: items is not an Iterable so assume it is already an array-like object.
+ * 4. Return ! ToObject(items).
+ */
+
+module.exports = function IterableToArrayLike(items) {
+	var usingIterator = getIteratorMethod(ES, items);
+	if (typeof usingIterator !== 'undefined') {
+		var iterator = GetIterator(items, usingIterator);
+		var values = [];
+		var next = true;
+		while (next) {
+			next = IteratorStep(iterator);
+			if (next) {
+				var nextValue = IteratorValue(next);
+				$arrayPush(values, nextValue);
+			}
+		}
+		return values;
+	}
+
+	return ToObject(items);
+};