// 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 C1<T> {}

main() {
  C1 c11 = C1();
  C1 c12 = C1<A>();
  C1 c13 = C1<B>();
  C1 c14 = C1<C>();
  C1 c15 = C1<Object>();
}