LanguageFeatures/Constant-update-2018/ShortCircuitOperators_A01_t12.dart

// 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 is now short-circuit in constant and potentially
 * constant expressions. It only attempts to evaluate the second operand if the
 * first operand evaluates to [true]. This makes [false && (null as
 * String).length] a valid constant expression. The second operand expression
 * still needs to be a potentially constant expression, which is a new use of
 * potentially constant expressions outside of [const] constructor initializer
 * lists.
 * @description Checks that compile error is thrown if the first [&&] operand is
 * [false] and the second one is not [bool] in the constant expression.
 * @author iarkh@unipro.ru
 */

const bool? nil = null;
const dynamic d = 1;

class MyClass1 {
  final bool b;
  const MyClass1() : b = false && d;
}

class MyClass2 {
  final bool b;
  const MyClass2() : b = false && nil;
//                                ^
// [analyzer] unspecified
// [cfe] unspecified
}

class MyClass3 {
  final bool b;
  const MyClass3() : b = false && nil as bool;
}

class MyClass4 {
  final bool b;
  const MyClass4() : b = false && d as bool;
}

main() {
}