// Copyright (c) 2015, 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 static type of a is flatten(T) (the flatten function is
/// defined in section 'Function Expressions' where T is the static type of e.
///
/// @assertion flatten(T) is defied as follows:
///    If T = Future<S> then flatten(T) = flatten(S).
///    Otherwise if T <: Future then let S be a type such that T << Future<S>
///  and for all R, if T << Future<R> then S << R.
///    This ensures that Future <S> is the most specific instantiation of
/// Future that is a super type of T.
///    Then flatten(T) = S.
///    In any other circumstance, flatten(T) = T.
///
/// @description Check that it is a compile error if static type of
/// await expression does no match with expected type.
/// @author a.semenov@unipro.ru


static_bool(bool x) => x;

main() {
    var f = () async => static_bool(await 1);
//                                  ^
// [analyzer] unspecified
// [cfe] unspecified
}