Dmitry Stefantsov
11790fe024
Closes #40094. Bug: http://dartbug.com/40094 Change-Id: I3af5258bf0845257915eb090889fde0fdcb96bf9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134339 Commit-Queue: Dmitry Stefantsov <dmitryas@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
50 lines
1.4 KiB
Dart
50 lines
1.4 KiB
Dart
// Copyright (c) 2020, 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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// The test checks for compile-time warnings about expressions of strictly
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// non-nullable types being used in positions typically occupied by those of
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// nullable types, that is, in various null-aware expressions.
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extension E on String {
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int get foo => 42;
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void operator[]=(int index, int value) {}
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int operator[](int index) => 42;
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}
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class A {
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String operator[](int index) => "foo";
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void operator[]=(int index, String value) {}
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}
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class B extends A {
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void test() {
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super[42] ??= "bar"; // Warning.
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}
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}
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warning(String s, List<String> l, Map<String, int> m) {
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s?.length; // Warning.
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s?..length; // Warning.
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s ?? "foo"; // Warning.
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s ??= "foo"; // Warning.
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[...?l]; // Warning.
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var a = {...?l}; // Warning.
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<String>{...?l}; // Warning.
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var b = {...?m}; // Warning.
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<String, int>{...?m}; // Warning.
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s!; // Warning.
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s?.substring(0, 0); // Warning.
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l?.length = 42; // Warning.
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l?.length += 42; // Warning.
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l?.length ??= 42; // Warning.
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s?.foo; // Warning.
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E(s)[42] ??= 42; // Warning.
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l[42] ??= "foo"; // Warning.
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l.length ??= 42; // Warning.
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l?..length = 42; // Warning.
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l?..length ??= 42; // Warning.
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}
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main() {}
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