| // 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 From the Unified collection Spec: |
| /// A [spreadElement] starting with [...?] is a constant element if its |
| /// expression is constant and it evaluates to [null] or 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 potentially constant |
| /// expression. |
| /// @description: Checks that constant list [...?] spread element can only be |
| /// potentially constant list or set or [null]. |
| /// @author iarkh@unipro.ru |
| |
| |
| 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] as List? : [])]; |
| const List l2 = [...?(A() is A ? [12345] as List? : [0])]; |
| const List l3 = [...?(MyClass("test") is MyClass ? [12345] : [] as List?)]; |
| const List l4 = [...?(A() is B ? {12345} as List? : {1})]; |
| const List l5 = [...?(A() is A ? {12345} as Set? : {0})]; |
| const List l6 = [...?(MyClass("test") is MyClass ? {12345} : {1} as Set?)]; |
| const List l7 = [...?(A() is B ? [12345] : null)]; |
| } |