// 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 A check of the form [e != null] or of the form [e is T] where [e]
/// has static type [T?] promotes the type of [e] to [T] in the [true]
/// continuation, and to [Null] in the [false] continuation.
///
/// @description Check that type of [e] is promoted to [T] in the [true]
/// condition. Test [e != null] expression. Test pre-NNBD legacy types.
/// @author iarkh@unipro.ru

// Requirements=nnbd-weak
import "legacy_lib.dart";

main() {
  A? a = new A();

  if (a != null) {
    a.foo();
    A a1 = a;
  }
}