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Diffstat (limited to 'node_modules/es-abstract/2016/IterableToArrayLike.js')
-rw-r--r--node_modules/es-abstract/2016/IterableToArrayLike.js56
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diff --git a/node_modules/es-abstract/2016/IterableToArrayLike.js b/node_modules/es-abstract/2016/IterableToArrayLike.js
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+++ b/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);
+};