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>
56 lines
1.4 KiB
Dart
56 lines
1.4 KiB
Dart
// TODO(multitest): This was automatically migrated from a multitest and may
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// contain strange or dead code.
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// 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 is used to invoke a method.
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import "package:expect/expect.dart";
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import "conditional_access_helper.dart" as h;
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bad() {
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Expect.fail('Should not be executed');
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}
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class B {}
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class C extends B {
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f(callback()?) => callback!();
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int g(int callback()) => callback();
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static staticF(callback()) => callback();
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static int staticG(int callback()) => callback();
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}
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C? nullC() => null;
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main() {
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// o?.m(...) is equivalent to ((x) => x == null ? null : x.m(...))(o).
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Expect.equals(null, nullC()?.f(bad()));
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C? c = C() as dynamic;
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Expect.equals(1, c?.f(() => 1));
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// C?.m(...) is equivalent to C.m(...).
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Expect.equals(1, C?.staticF(() => 1));
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Expect.equals(1, h.C?.staticF(() => 1));
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// The static type of o?.m(...) is the same as the static type of
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// o.m(...).
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{
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int? i = nullC()?.g(bad());
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Expect.equals(null, i);
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}
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{
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int? i = c?.g(() => 1);
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Expect.equals(1, i);
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}
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{
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int? i = C?.staticG(() => 1);
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Expect.equals(1, i);
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}
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{
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int? i = h.C?.staticG(() => 1);
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Expect.equals(1, i);
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}
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}
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