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;
}