blob: f50cf49da00476d8f911b8d23d59afcbb37ffbfc [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 matches with expected
/// non-nullable [FutureOr] dynamically and the expression cannot be [null].
/// Check that compile error is not thrown if synchronous function with
/// [FutureOr<bool>] return value type returns a value of the type [dynamic].
/// @Issue
/// @Issue
/// @Issue 41266,41437,42236,42237
/// @author
// Requirements=nnbd-strong
import "dart:async";
import "../../Utils/expect.dart";
dynamic getNull() => null;
Future<FutureOr<bool>> test() async => await getNull();
main() {
test().then((value) {"Should not reach here!"); },
onError:(e) => asyncEnd());