| // Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| extension SafeAccess<T> on Iterable<T> { |
| T get safeFirst { |
| return isNotEmpty ? first : throw ''; |
| } |
| } |
| |
| main() {} |
| |
| void test() { |
| final list = []; |
| list.safeFirst(); |
| final list2 = <void Function(int)>[]; |
| list2.safeFirst(0); |
| } |
| |
| void errors() { |
| final list = <Object>[]; |
| list.safeFirst(); |
| final list2 = <void Function(int)>[]; |
| list2.safeFirst(); |
| } |