blob: 47e0b583448fe5051988a5e716c98a058fffba34 [file] [log] [blame]
* 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 The [==] operator in constant expressions was defined such that
* [e1 != null] was only allowed if [e1] had one of the "primitive" system
* types. Users had to rewrite their code to [!identical(e1, null)]. This was
* changed so that the [==] expression is always allowed as long as one of the
* operands is [null].
* @description Checks that compile-time exception is thrown if one of the [==]
* operand is [null] and another one is not a potentially constant.
* @author
class A {}
A? a;
main() {
const bool a1 = (a == null);
// ^
// [analyzer] unspecified
// [cfe] unspecified