LanguageFeatures/nnbd/static_errors_A05_t19.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 It is an error if a class declaration declares an instance
/// variable with a potentially non-nullable type and no initializer expression,
/// and the class has a generative constructor where the variable is not
/// initialized via an initializing formal or an initializer list entry, unless
/// the variable is marked with a `late`, `abstract`, or `external` modifier.
///
/// @description Check that it is no error if an instance variable with a
/// potentially non-nullable type has no initializer expression but initialized
/// in a constructor via an initializing formal or an initializer list entry.
/// Test type `<T extends Object?>`.
/// @author sgrekhov@unipro.ru

class A {}

class C1<T extends Object?> {
  T t;
  C1(T t): this.t = t {}
}

class C2<T extends Object?> {
  T t;
  C2(this.t);
}

main() {
  new C1<A>(new A());
  new C2<A>(new A());

  new C1<String>("Show must go on");
  new C2<String>("Lily was here");
}