tests/language/nonfunction_type_aliases/mixed/usage_object_error_test.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.
// @dart = 2.9
// Requirements=nnbd-weak


// Test that a type alias `T` denoting `Object`
// can give rise to the expected errors.

import 'usage_object_error_lib.dart';

// Use the aliased type.

abstract class C {
  T v10;
  final T v12;
  C() : v12 = T();
  C.name1(this.v10, this.v12);
  factory C.name2(T arg1, T arg2) = C1.name1;
}

class C1 implements C {
  C1.name1(T arg1, T arg2);
  noSuchMethod(Invocation invocation) => throw 0;
}

abstract class D2 extends C with T {}
//             ^
// [analyzer] unspecified
// [cfe] Can't use 'Object' as a mixin because it has constructors.

abstract class D3 implements T {}
//             ^
// [analyzer] unspecified
// [cfe] 'Object' can't be used in both 'extends' and 'implements' clauses.

abstract class D4 = C with T;
//             ^
// [analyzer] unspecified
// [cfe] Can't use 'Object' as a mixin because it has constructors.

main() {
  T.named();
//  ^^^^^
// [analyzer] unspecified
// [cfe] Member not found: 'Object.named'.

  T.staticMethod<T>();
//  ^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] A constructor invocation can't have type arguments after the constructor name.
// [cfe] Member not found: 'Object.staticMethod'.
}