Language/Generics/Superbounded_types/class_A01_t06.dart

// 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 It is a compile-time error if a parameterized type [T] is
 * super-bounded when it is used in any of the following ways:
 *   [T] is an immediate subterm of a new expression (16.15.1) or a constant
 *   object expression
 * @description Checks that compile error is not thrown when well-bounded
 * parametrized type is used in the constant object expression with [as]
 * constructions.
 * @Issue 42415, 42429
 * @author iarkh@unipro.ru
 */

class A<T extends A<T>> {}

main() {
  var b1 = null as A?;

  var b2 = null as A<dynamic>?;
  var b3 = null as A<Object?>?;
  var b4 = null as A<Object>?;       //# 01: compile-time error
  var b5 = null as A<Never>?;
  var b6 = null as A<void>?;

  var b7  = null as A<A>?;
  var b8  = null as A<A<dynamic>>?;
  var b9  = null as A<A<Object?>>?;
  var b10 = null as A<A<Object>>?;   //# 02: compile-time error
  var b11 = null as A<A<Never>>?;
  var b12 = null as A<A<void>>?;
}