Lasse R.H. Nielsen
46b3b6352d
Change-Id: I0e932695b00dc8fab34fbbeada5777cb4534150e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/162510 Commit-Queue: Lasse R.H. Nielsen <lrn@google.com> Reviewed-by: Bob Nystrom <rnystrom@google.com>
53 lines
1.1 KiB
Dart
53 lines
1.1 KiB
Dart
// Copyright (c) 2015, 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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// Verify semantics of the ?. operator when it does not appear on the LHS of an
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// assignment.
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import "package:expect/expect.dart";
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import "conditional_access_helper.dart" as h;
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class B {}
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class C extends B {
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int? v;
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C(this.v);
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static int? staticInt;
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}
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C? nullC() => null;
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main() {
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// e1?.id is equivalent to ((x) => x == null ? null : x.id)(e1).
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Expect.equals(null, nullC()?.v);
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C? c = new C(1) as dynamic;
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Expect.equals(1, c?.v);
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// C?.id is equivalent to C.id.
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C.staticInt = 1;
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Expect.equals(1, C?.staticInt);
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h.C.staticInt = 1;
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Expect.equals(1, h.C?.staticInt);
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// The static type of e1?.id is the static type of e1.id.
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{
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int? i = c?.v;
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Expect.equals(1, i);
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}
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{
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C.staticInt = 1;
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int? i = C?.staticInt;
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Expect.equals(1, i);
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}
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{
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h.C.staticInt = 1;
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int? i = h.C?.staticInt;
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Expect.equals(1, i);
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}
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}
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