Language/Generics/typedef_A07_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 type alias is a declaration [D] of one of the following
/// forms:
///   m typedef id<X1 extends B1, . . . , Xs extends Bs> = T;
///   m typedef S? id<X1 extends B1, . . . , Xs extends Bs>(
///     T1 p1, . . . , Tn pn, [Tn+1 pn+1, . . . , Tn+k pn+k]);
///   m typedef S? id<X1 extends B1, . . . , Xs extends Bs>(
///     T1 p1, . . . , Tn pn, {Tn+1 pn+1, . . . , Tn+k pn+k});
/// where [m] is derived from metadata, [T] is a type, and [S?] is a type or the
/// empty string. Let [S0] be [S?] if it is a type, otherwise let [S0] be
/// [dynamic]. The associated type of [D], call it [F], is, respectively:
///   T
///   S0 Function(T1, . . . , Tn, [Tn+1, . . . , Tn+k])
///   S0 Function(T1, . . . , Tn, {Tn+1 xn+1, . . . , Tn+k xn+k})
/// ...
/// Moreover, let [T1], . . . , [Tl] be types and let [U] be the parameterized
/// type id<T1, . . . , Tl> in a location where [id] denotes [D]. It is a
/// compile-time error if [l] != [s].
/// @description Checks that compile error is thrown if parametrized type number
/// is incorrect for [typedef] which defines class.
/// @author iarkh@unipro.ru

class A<T> {}

class B<T1, T2> {}

class C<T1, T2, T3> {}

typedef AAlias<T> = A<T>;
typedef BAlias<T1, T2> = B<T1, T2>;
typedef CAlias<T1, T2, T3> = C<T1, T2, T3>;

main() {
  AAlias a1;
  AAlias<int> a2;
  AAlias<dynamic, dynamic>? a3;
//^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  AAlias<int, dynamic, String>? a4;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  AAlias<int, dynamic, String, dynamic>? a5;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  BAlias b1;
  BAlias<int>? b2;
//^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  BAlias<dynamic, dynamic> b3;
  BAlias<int, dynamic, String>? b4;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  BAlias<int, dynamic, String, dynamic>? b5;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  CAlias c1;
  CAlias<int>? c2;
//^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  CAlias<dynamic, dynamic>? c3;
//^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  CAlias<int, dynamic, String> c4;
  CAlias<int, dynamic, String, dynamic>? c5;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}