tests/language_2/function_subtype_inline1_test.dart

// Copyright (c) 2013, 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 test program for constructors and initializers.

// Check function subtyping.

import 'package:expect/expect.dart';

class A {}

class B extends A {}

class C extends A {}

class Class<K, V> {
  void forEach(void f(K k, V v)) {}
}

main() {
  Class<B, C> c = new Class<B, C>();
  c.forEach((A a, A b) {});
  c.forEach((B a, C b) {});
  Expect.throwsTypeError(() => c.forEach((A a, B b) {} as dynamic));
}