Language/Generics/class_A01_t02.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 [m != l].
/// @description Checks that compile error is thrown for the case with one type
/// argument
/// @author iarkh@unipro.ru


class C1<T extends num?> {}

main() {
  C1? c1;

  C1<int>?  c2;
  C1<void>? c3;
  C1<Null>? c4;
  C1<int?>?  c5;

  C1<int, int>?                                                   c6;
//^^^^^^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.WRONG_NUMBER_OF_TYPE_ARGUMENTS
// [cfe] Expected 1 type arguments.
  C1<int, int, int>?                                              c7;
//^^^^^^^^^^^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.WRONG_NUMBER_OF_TYPE_ARGUMENTS
// [cfe] Expected 1 type arguments.
  C1<int, int, int, int, int>?                                    c8;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.WRONG_NUMBER_OF_TYPE_ARGUMENTS
// [cfe] Expected 1 type arguments.
  C1<int, int, int, int, int, int, int, int, int, int, int, int>? c9;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.WRONG_NUMBER_OF_TYPE_ARGUMENTS
// [cfe] Expected 1 type arguments.
  C1<List<num>>?                                                 c10;
  // ^^^^^^^^^
  // [analyzer] COMPILE_TIME_ERROR.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS
  //                                                             ^
  // [cfe] Type argument 'List<num>' doesn't conform to the bound 'num?' of the type variable 'T' on 'C1'.
  C1<C1>?                                                        c11;
  // ^^
  // [analyzer] COMPILE_TIME_ERROR.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS
  //                                                             ^
  // [cfe] Type argument 'C1<num?>' doesn't conform to the bound 'num?' of the type variable 'T' on 'C1'.
}