pkg/front_end/testcases/inference/future_union_async_conditional_2.dart

// Copyright (c) 2017, 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.
// @dart=2.9
/*@testedFeatures=inference*/
library test;

import 'dart:async';

class MyFuture<T> implements Future<T> {
  MyFuture() {}
  MyFuture.value(x) {}
  dynamic noSuchMethod(invocation) => null;
  MyFuture<S> then<S>(FutureOr<S> f(T x), {Function onError}) => null;
}

Future<int> g1(bool x) async {
  return /*info:DOWN_CAST_COMPOSITE*/ x
      ? 42
      : new /*@ typeArgs=int* */ MyFuture.value(42);
}

Future<int> g2(bool x) async =>
    /*info:DOWN_CAST_COMPOSITE*/ x
        ? 42
        : new /*@ typeArgs=int* */ MyFuture.value(42);
Future<int> g3(bool x) async {
  var /*@ type=Object* */ y =
      x ? 42 : new /*@ typeArgs=dynamic */ MyFuture.value(42);
  return /*info:DOWN_CAST_COMPOSITE*/ y;
}

main() {}