Commit

1 files changed, 43 insertions, 0 deletions

diff --git a/src/node_modules/es-abstract/2017/CreateListFromArrayLike.js b/src/node_modules/es-abstract/2017/CreateListFromArrayLike.js
new file mode 100644
index 0000000..d6b44b5
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+++ b/src/node_modules/es-abstract/2017/CreateListFromArrayLike.js
@@ -0,0 +1,43 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var callBound = require('../helpers/callBound');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+var $indexOf = callBound('Array.prototype.indexOf', true) || callBound('String.prototype.indexOf');
+var $push = callBound('Array.prototype.push');
+
+var Get = require('./Get');
+var IsArray = require('./IsArray');
+var ToLength = require('./ToLength');
+var ToString = require('./ToString');
+var Type = require('./Type');
+
+// https://ecma-international.org/ecma-262/6.0/#sec-createlistfromarraylike
+module.exports = function CreateListFromArrayLike(obj) {
+	var elementTypes = arguments.length > 1
+		? arguments[1]
+		: ['Undefined', 'Null', 'Boolean', 'String', 'Symbol', 'Number', 'Object'];
+
+	if (Type(obj) !== 'Object') {
+		throw new $TypeError('Assertion failed: `obj` must be an Object');
+	}
+	if (!IsArray(elementTypes)) {
+		throw new $TypeError('Assertion failed: `elementTypes`, if provided, must be an array');
+	}
+	var len = ToLength(Get(obj, 'length'));
+	var list = [];
+	var index = 0;
+	while (index < len) {
+		var indexName = ToString(index);
+		var next = Get(obj, indexName);
+		var nextType = Type(next);
+		if ($indexOf(elementTypes, nextType) < 0) {
+			throw new $TypeError('item type ' + nextType + ' is not a valid elementType');
+		}
+		$push(list, next);
+		index += 1;
+	}
+	return list;
+};