| // 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 statically that a spread element inference context type |
| /// is [T] in the list literal |
| /// @author iarkh@unipro.ru |
| |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| |
| List<T> getAList<T>(var a) { return <T>[a]; } |
| |
| main() { |
| var a_list = getAList<A>(new A()); |
| var b_list = getAList<B>(new B()); |
| var c_list = getAList<C>(new C()); |
| var int_list = getAList<int>(12); |
| var str_list = ["string"]; |
| A a = new A(); |
| B b = new B(); |
| C c = new C(); |
| |
| List list1 = <int>[2, 7, ...int_list, 4]; |
| List list2 = <A>[a, ...a_list]; |
| List list3 = <A>[a, ...b_list]; |
| List list4 = <A>[a, c, ...c_list, b]; |
| List list5 = <A>[a, b, c, ...c_list, new B(), ...a_list, ...b_list, new A()]; |
| List list6 = <B>[b, ...b_list, c, ...c_list]; |
| List list7 = [123, "123", null, a, ...a_list, ...?b_list, c, b, ...?c_list, |
| // ^^^^ |
| // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR |
| // ^^^^ |
| // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR |
| // ^ |
| // [cfe] Operand of null-aware operation '...?' has type 'List<B>' which excludes null. |
| // ^ |
| // [cfe] Operand of null-aware operation '...?' has type 'List<C>' which excludes null. |
| ...str_list, ...int_list, null, 1499, []]; |
| } |