Robert Nystrom
f205141a42
Change-Id: Ib798b9573ee8ec924f87104684934785fadc8189 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141702 Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Leaf Petersen <leafp@google.com> Reviewed-by: Erik Ernst <eernst@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com>
32 lines
1.2 KiB
Dart
32 lines
1.2 KiB
Dart
// Copyright (c) 2017, 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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// Requirements=nnbd-weak
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import "package:expect/expect.dart";
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main() {
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// Pre-NNBD bottom type.
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int Function(Null) f = (x) => 1; // Runtime type is int Function(Object?)
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Expect.isTrue(f is int Function(Null));
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Expect.isTrue(f is int Function(Never));
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Expect.isTrue(f is int Function(String));
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Expect.isTrue(f is int Function(Object));
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Expect.isTrue(f is int Function(Object?));
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// NNBD bottom type.
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int Function(Never) g = (x) => 1; // Runtime type is int Function(Object?)
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Expect.isTrue(g is int Function(Null));
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Expect.isTrue(g is int Function(Never));
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Expect.isTrue(g is int Function(String));
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Expect.isTrue(g is int Function(Object));
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Expect.isTrue(g is int Function(Object?));
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int Function(String) h = (x) => 1; // Runtime type is int Function(String)
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Expect.isTrue(h is int Function(Null));
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Expect.isTrue(h is int Function(Never));
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Expect.isTrue(h is int Function(String));
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Expect.isFalse(h is int Function(Object));
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Expect.isFalse(h is int Function(Object?));
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}
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