LanguageFeatures/Constant-update-2018/ShortCircuitOperators_A01_t07.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 [&&] does not attempt to calculate the second
/// operand of [&&] operation if the first one is [false] in the potentially
/// constant expression.
/// @author iarkh@unipro.ru


import "../../Utils/expect.dart";

const int? checkme = null;

class MyClass {
  final bool b;
  const MyClass(Object? o) : b = false && ((o as int) > 25);
}

main() {
  const MyClass c1 = MyClass("testme");
  Expect.isFalse(c1.b);

  const MyClass c2 = MyClass(checkme);
  Expect.isFalse(c2.b);
}