| // 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. |
| |
| // @dart = 2.9 |
| |
| /// @assertion From the Unified collection Spec: |
| /// A spreadElement starting with [...] is a constant element if its expression |
| /// is constant and it evaluates to a constant List, Set or Map instance |
| /// originally created by a list, set or map literal. It is a potentially |
| /// constant element if the expression is a potentially constant expression. |
| /// @description: Checks that constant list spread element can be potentially |
| /// constant list or set. |
| /// @author iarkh@unipro.ru |
| |
| |
| import "../../Utils/expect.dart"; |
| |
| class A { |
| const A(); |
| } |
| |
| class B extends A { |
| const B(); |
| } |
| |
| class MyClass { |
| final String a; |
| const MyClass(Object o) : a = o as String; |
| } |
| |
| |
| main() { |
| const List l1 = [...(A() is B ? [12345] : [])]; |
| Expect.listEquals([], l1); |
| |
| const List l2 = [...(A() is A ? [12345] : [0])]; |
| Expect.listEquals([12345], l2); |
| |
| const List l3 = [...(MyClass("test") is MyClass ? [12345] : [])]; |
| Expect.listEquals([12345], l3); |
| |
| const List l4 = [...(A() is B ? {12345} : {1})]; |
| Expect.listEquals([1], l4); |
| |
| const List l5 = [...(A() is A ? {12345} : {0})]; |
| Expect.listEquals([12345], l5); |
| |
| const List l6 = [...(MyClass("test") is MyClass ? {12345} : {1})]; |
| Expect.listEquals([12345], l6); |
| } |