Language/Statements/Return/runtime_type_t04.dart

// Copyright (c) 2016, 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 S be the runtime type of o.
///    • If the body of f is marked async it is a compile type error if o is not
/// null and Future<S> is not a subtype of the actual return type of f.
///    • Otherwise, it is a compile type error if o is not null and the runtime
/// type of o is not a subtype of the actual return type of f.
///
/// @description Checks that compile error is raised if o is
/// not null and Future<S> is not a subtype of the actual return type of the
/// immediately enclosing async function.
///
/// @Issue 26133
/// @author a.semenov@unipro.ru

import 'dart:async';
import '../../../Utils/expect.dart';

var r = 'a';

Future<int> foo() async { return r; }
//                               ^
// [analyzer] unspecified
// [cfe] unspecified

main() {}