Paul Berry
8e85492162
In https://dart-review.googlesource.com/c/sdk/+/399480, a mechanism was introduced to `_fe_analyzer_shared` to support null-shorting. Sometime later, in https://dart-review.googlesource.com/c/sdk/+/427341, the CFE was changed to use this shared mechanism. This CL completes the arc of work by changing the analyzer to use the new shared mechanism. The public API class `NullShortableExpression`, which was part of the analyzer's old implementation of null shorting, is no longer used. It should never have been exposed through the analyzer public API in the first place, so it's been deprecated; I will update the pending changes for analyzer 9.0.0 to delete it. Change-Id: Ic711df6c537c454aa8a99861135e63c8dd277485 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/400021 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
42 lines
1.1 KiB
Dart
42 lines
1.1 KiB
Dart
// Copyright (c) 2025, 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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// Check null-shortening semantics of `?.` and `?[]` when they appear as the
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// target of a function invocation.
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import "package:expect/expect.dart";
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import "package:expect/static_type_helper.dart";
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Never get unreachable => Expect.fail("Unreachable") as Never;
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class A {
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int Function(Object?) getFn1() => (x) {
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Expect.fail('Should never be called');
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return 0;
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};
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int Function(Object?) Function() get getFn2 =>
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() => (x) {
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Expect.fail('Should never be called');
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return 0;
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};
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int Function(Object?) operator [](int i) => (x) {
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Expect.fail('Should never be called');
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return 0;
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};
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}
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main() {
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A? a = null;
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Expect.equals(
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(a?.getFn1()(unreachable))..expectStaticType<Exactly<int?>>(),
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null,
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);
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Expect.equals(
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(a?.getFn2()(unreachable))..expectStaticType<Exactly<int?>>(),
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null,
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);
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Expect.equals((a?[0](unreachable))..expectStaticType<Exactly<int?>>(), null);
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}
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