// 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.

// @dart = 2.9

/// @assertion
///    typeParameter ::= metadata identifier (extends typeNotVoid)?
///    typeParameters ::= ‘<’ typeParameter (‘,’ typeParameter)* ‘>’
/// ...
/// If no extends clause is present, the upper bound is Object.
/// @description Checks that the upper bound is [Object] if [extends] clause is
/// absent.
/// @author iarkh@unipro.ru


class A {}
class B extends A {}
class C extends B {}

class D<T> {}

typedef Alias<T> = void Function(T);

main() {
  Alias a1;
  Alias<A> a2;
  Alias<B> a3;
  Alias<C> a4;
  Alias<Object> a5;
}