blob: fa50a7540b335812425e1d4e52ad8ecbabcd4168 [file] [log] [blame]
// Copyright (c) 2020, 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 flatten function is modified as follows:
///
/// [flatten(T)] is defined by cases on [T]:
///
/// if [T] is [S?] then [flatten(T) = flatten(S)?]
/// otherwise if [T] is [S*] then [flatten(T) = flatten(S)*]
/// otherwise if [T] is [FutureOr<S>] then [flatten(T) = 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]; then
/// [flatten(T) = S]
/// otherwise [flatten(T) = T]
///
/// @description Check that type of await expression match with expected
/// [Never] type dynamically and the expression cannot be non-null.
///
/// @author iarkh@unipro.ru
// Requirements=nnbd-strong
import "dart:async";
import "../../Utils/expect.dart";
dynamic getInt() => 1;
Future test() async {
Never i = await getInt();
return i;
}
main() {
asyncStart();
test().then((value) { Expect.fail("Should not reach here!"); },
onError:(e) => asyncEnd());
}