| // 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 MyClass { |
| final String a; |
| const MyClass(Object o) : a = o as String; |
| } |
| |
| main() { |
| const List l1 = [...?(MyClass(12345) is MyClass ? [12] : [])]; |
| // ^^^^^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| const List l2 = [...?(MyClass(12345) is MyClass ? {12} : {2})]; |
| // ^^^^^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| const List l3 = [...?(MyClass(12345) is MyClass ? {12} : null)]; |
| // ^ |
| // [cfe] Constant evaluation error: |
| // ^^^^^^^^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.CONST_EVAL_THROWS_EXCEPTION |
| const List l4 = [...?(MyClass(12345) is MyClass ? {null} : 1)]; |
| // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
