mirror of
https://github.com/dart-lang/sdk
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b101a7d002
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
116 lines
4.7 KiB
Dart
116 lines
4.7 KiB
Dart
// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.9
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// In strong mode, `FutureOr` should be equivalent to the union of `Future<T>`
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// and `T`.
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import 'dart:async';
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import 'package:expect/expect.dart';
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typedef void FunTakes<T>(T x);
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typedef T FunReturns<T>();
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main() {
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Expect.isTrue(499 is FutureOr); // Same as `is Object`.
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Expect.isTrue(499 is FutureOr<int>);
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Expect.isFalse(499 is FutureOr<String>);
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Expect.isTrue(new Future.value(499) is FutureOr); // Same as `is Object`.
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Expect.isTrue(new Future.value(499) is FutureOr<int>);
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Expect.isFalse(new Future.value(499) is FutureOr<String>);
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void foo(FutureOr x) {} // Equivalent to `void bar(Object x) {}`.
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// A function that takes Object takes everything.
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Expect.isTrue(foo is FunTakes<dynamic>);
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Expect.isTrue(foo is FunTakes<Object>);
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Expect.isTrue(foo is FunTakes<int>);
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Expect.isTrue(foo is FunTakes<String>);
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Expect.isTrue(foo is FunTakes<Future<int>>);
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Expect.isTrue(foo is FunTakes<Future<String>>);
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Expect.isTrue(foo is FunTakes<FutureOr<Object>>);
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Expect.isTrue(foo is FunTakes<FutureOr<int>>);
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Expect.isTrue(foo is FunTakes<FutureOr<String>>);
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Expect.isTrue(foo is FunTakes<FutureOr<FutureOr<Object>>>);
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Expect.isTrue(foo is FunTakes<FutureOr<FutureOr<int>>>);
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Expect.isTrue(foo is FunTakes<FutureOr<FutureOr<String>>>);
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FutureOr bar() => 499; // Equivalent to `Object foo() => 499`.
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Expect.isTrue(bar is FunReturns<dynamic>);
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Expect.isTrue(bar is FunReturns<Object>);
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Expect.isFalse(bar is FunReturns<int>);
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Expect.isFalse(bar is FunReturns<String>);
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Expect.isFalse(bar is FunReturns<Future<int>>);
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Expect.isFalse(bar is FunReturns<Future<String>>);
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Expect.isTrue(bar is FunReturns<FutureOr<Object>>);
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Expect.isFalse(bar is FunReturns<FutureOr<int>>);
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Expect.isFalse(bar is FunReturns<FutureOr<String>>);
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Expect.isTrue(bar is FunReturns<FutureOr<FutureOr<Object>>>);
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Expect.isFalse(bar is FunReturns<FutureOr<FutureOr<int>>>);
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Expect.isFalse(bar is FunReturns<FutureOr<FutureOr<String>>>);
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void foo2(FutureOr<String> x) {}
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Expect.isFalse(foo2 is FunTakes<dynamic>);
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Expect.isFalse(foo2 is FunTakes<Object>);
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Expect.isFalse(foo2 is FunTakes<int>);
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Expect.isTrue(foo2 is FunTakes<String>);
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Expect.isFalse(foo2 is FunTakes<Future<int>>);
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Expect.isTrue(foo2 is FunTakes<Future<String>>);
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Expect.isFalse(foo2 is FunTakes<FutureOr<Object>>);
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Expect.isFalse(foo2 is FunTakes<FutureOr<int>>);
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Expect.isTrue(foo2 is FunTakes<FutureOr<String>>);
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Expect.isFalse(foo2 is FunTakes<FutureOr<FutureOr<Object>>>);
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Expect.isFalse(foo2 is FunTakes<FutureOr<FutureOr<int>>>);
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Expect.isFalse(foo2 is FunTakes<FutureOr<FutureOr<String>>>);
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FutureOr<int> bar2() => 499;
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Expect.isTrue(bar2 is FunReturns<dynamic>);
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Expect.isTrue(bar2 is FunReturns<Object>);
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Expect.isFalse(bar2 is FunReturns<int>);
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Expect.isFalse(bar2 is FunReturns<String>);
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Expect.isFalse(bar2 is FunReturns<Future<int>>);
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Expect.isFalse(bar2 is FunReturns<Future<String>>);
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Expect.isTrue(bar2 is FunReturns<FutureOr<Object>>);
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Expect.isTrue(bar2 is FunReturns<FutureOr<int>>);
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Expect.isFalse(bar2 is FunReturns<FutureOr<String>>);
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Expect.isTrue(bar2 is FunReturns<FutureOr<FutureOr<Object>>>);
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Expect.isTrue(bar2 is FunReturns<FutureOr<FutureOr<int>>>);
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Expect.isFalse(bar2 is FunReturns<FutureOr<FutureOr<String>>>);
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void foo3(String x) {}
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Expect.isFalse(foo3 is FunTakes<dynamic>);
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Expect.isFalse(foo3 is FunTakes<Object>);
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Expect.isFalse(foo3 is FunTakes<int>);
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Expect.isTrue(foo3 is FunTakes<String>);
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Expect.isFalse(foo3 is FunTakes<Future<int>>);
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Expect.isFalse(foo3 is FunTakes<Future<String>>);
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Expect.isFalse(foo3 is FunTakes<FutureOr<Object>>);
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Expect.isFalse(foo3 is FunTakes<FutureOr<int>>);
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Expect.isFalse(foo3 is FunTakes<FutureOr<String>>);
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Expect.isFalse(foo3 is FunTakes<FutureOr<FutureOr<Object>>>);
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Expect.isFalse(foo3 is FunTakes<FutureOr<FutureOr<int>>>);
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Expect.isFalse(foo3 is FunTakes<FutureOr<FutureOr<String>>>);
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int bar3() => 499;
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Expect.isTrue(bar3 is FunReturns<dynamic>);
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Expect.isTrue(bar3 is FunReturns<Object>);
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Expect.isTrue(bar3 is FunReturns<int>);
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Expect.isFalse(bar3 is FunReturns<String>);
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Expect.isFalse(bar3 is FunReturns<Future<int>>);
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Expect.isFalse(bar3 is FunReturns<Future<String>>);
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Expect.isTrue(bar3 is FunReturns<FutureOr<Object>>);
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Expect.isTrue(bar3 is FunReturns<FutureOr<int>>);
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Expect.isFalse(bar3 is FunReturns<FutureOr<String>>);
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Expect.isTrue(bar3 is FunReturns<FutureOr<FutureOr<Object>>>);
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Expect.isTrue(bar3 is FunReturns<FutureOr<FutureOr<int>>>);
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Expect.isFalse(bar3 is FunReturns<FutureOr<FutureOr<String>>>);
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}
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