| /* |
| * Copyright (c) 2019, 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. |
| */ |
| /** |
| * @assertion If a list or set literal has a downwards inference type of |
| * [Iterable<T>] for some [T], then the downwards inference context type of a |
| * spread element in that list is [Iterable<T>]. |
| * @description Checks that a spread element inference context type is [T] in |
| * the list literal |
| * @author iarkh@unipro.ru |
| */ |
| |
| import "../../Utils/expect.dart"; |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| |
| List<T> getAList<T>(var a) { return <T>[a]; } |
| |
| main() { |
| dynamic a_list = getAList<A>(new A()); |
| dynamic b_list = getAList<B>(new B()); |
| dynamic c_list = getAList<C>(new C()); |
| dynamic int_list = getAList<int>(12); |
| dynamic str_list = ["string"]; |
| A a = new A(); |
| B b = new B(); |
| C c = new C(); |
| |
| List list1 = <int>[2, 7, ...int_list, 4]; |
| Expect.isTrue(list1 is List<int>); |
| |
| List list2 = <A>[a, ...a_list]; |
| Expect.isTrue(list2 is List<A>); |
| |
| List list3 = <A>[a, ...b_list]; |
| Expect.isTrue(list3 is List<A>); |
| |
| List list4 = <A>[a, c, ...c_list, b]; |
| Expect.isTrue(list4 is List<A>); |
| |
| List list5 = <A>[a, b, c, ...c_list, new B(), ...a_list, ...b_list, new A()]; |
| Expect.isTrue(list5 is List<A>); |
| |
| List list6 = <B>[b, ...b_list, c, ...c_list]; |
| Expect.isTrue(list6 is List<B>); |
| |
| List list7 = [123, "123", null, a, ...a_list, ...?b_list, c, b, ...?c_list, |
| ...str_list, ...int_list, null, 1499, []]; |
| Expect.isTrue(list7 is List<Object?>); |
| |
| List list8; |
| |
| Expect.throws(() => list8 = <int>[...str_list]); |
| Expect.throws(() => list8 = <int>[1, 2, ...a_list, 14]); |
| Expect.throws(() => list8 = <int>[1, 14, 0, ...c_list]); |
| |
| Expect.throws(() => list8 = <A>[...int_list]); |
| Expect.throws(() => list8 = <A>[...?str_list]); |
| |
| Expect.throws(() => list8 = <B>[...a_list]); |
| Expect.throws(() => list8 = <B>[b, ...?a_list, c]); |
| |
| Expect.throws(() => list8 = <C>[...b_list]); |
| Expect.throws(() => list8 = <C>[...a_list, ...?b_list]); |
| |
| Expect.throws(() => list8 = <B>[...a_list]); |
| Expect.throws(() => list8 = <B>[b, ...?a_list, c]); |
| |
| Expect.throws(() => list8 = <C>[...b_list]); |
| Expect.throws(() => list8 = <C>[...a_list, ...?b_list]); |
| } |