LanguageFeatures/nnbd/weak/nullability_definitions_A01_t04.dart

// Copyright (c) 2020, 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 We say that a type T is nullable if Null <: T and not T <: Object.
 * This is equivalent to the syntactic criterion that T is any of:
 *  Null
 *  S? for some S
 *  S* for some S where S is nullable
 *  FutureOr<S> for some S where S is nullable
 *  dynamic
 *  void
 *
 * @description Check that null can be assigned to nullable type. Test S* for
 * some S where S is nullable. Test pre-NNBD legacy classes
 * @author sgrekhov@unipro.ru
 */
// Requirements=nnbd-weak
import "legacy_lib.dart";

main() {
  var a1 = getLegacyDynamic(null);
  a1 = null;

  var a2 = getLegacyDynamic("Show must go on");
  a2 = null;

  var a3 = getLegacyNull();
  a3 = null;
}