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// 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.
/// @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
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;