Language/Classes/Constructors/Factories/return_type_t07.dart

// Copyright (c) 2011, 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 The return type of a factory whose signature is of the
 * form factory M or the form factory M.id is M if M is not a generic type;
 * otherwise the return type is M <T1, …, Tn>, where T1, …, Tn are the type
 * parameters of the enclosing class.
 * @description Checks that assigning the result of invoking a factory
 * constructor to a variable whose type is not assignable to M<T1,...,Tn>
 * produces a compile error.
 * @compile-error
 * @author rodionov
 */

import "../../../../Utils/dynamic_check.dart";

class S1 {}
class S2 extends S1 {}
class S3 extends S2 {}

abstract class I<T, U, V> {
  factory I() {return new M<T, U, V>();}
}

class M<T, U, V> implements I<T, U, V> {
}

I<S3, int, int> m1;

main() {
  checkTypeError(() {
    m1 = new I<S2, num, Function>();
  });
}