Language/Statements/Return/type_t02.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 Let T be the static type of e and let f be the immediately
/// enclosing function.
///    It is a static type warning if the body of f is marked async and the type
/// Future<flatten(T)> may not be assigned to the declared return type of f.
/// Otherwise, it is a static type warning if T may not be assigned to the
/// declared return type of f.
///
/// @description Checks that no static warning occurs if the type of e may be
/// assigned to the declared return type of the immediately enclosing function.
///
/// @author rodionov


abstract class I {}
class S implements I {}
class C extends S {}

S foo() {  return new C(); }
I foo2() { return new C(); }
C bar() {  return new C(); }

main() {
  foo();
  foo2();
  bar();
}