Language/Generics/class_A02_t01.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 A generic class declaration introduces a generic class into the 
 * enclosing library scope. A generic class is a mapping that accepts a list of
 * actual type arguments and maps them to a class. Consider a generic class
 * declaration [G] named [C] with formal type parameter declarations [X1 extends
 * B1,..., Xm extends Bm], and a parameterized type [T] of the form
 * [C<T1,..., Tl>].
 * ...
 * It is a compile-time error if T is not well-bounded.
 * @description Checks that compile error is thrown for the case with one type
 * argument
 * @author iarkh@unipro.ru
 */

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

main() {
  A<int>? a1;
  A<C>? a2;
  A a = A<C<Never>>();
  A<C<Never>>? a3;
  A<C<dynamic>>? a4;

  A<C<int>>? a5;
  //  ^^^
  // [analyzer] COMPILE_TIME_ERROR.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS
  //         ^
  // [cfe] Type argument 'int' doesn't conform to the bound 'C<T>' of the type variable 'T' on 'C'.
  A<C<C<int>>>? a6;
// [error line 35, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  A<C<C<C<C<C<C<int>>>>>>>? a7;
// [error line 39, column 0]
// [analyzer] unspecified
// [cfe] unspecified

  C<C<int>>? c1;
// [error line 44, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  C<C<C<int>>>? c2;
// [error line 48, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  C<C<C<C<C<C<C<int>>>>>>>? c3;
// [error line 52, column 0]
// [analyzer] unspecified
// [cfe] unspecified

}