Johnni Winther
89967b83f5
Change-Id: I2c74003cf6bc9ca5dde7e982af053d6e9d54714d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134286 Reviewed-by: Dmitry Stefantsov <dmitryas@google.com> Commit-Queue: Johnni Winther <johnniwinther@google.com>
59 lines
1.2 KiB
Dart
59 lines
1.2 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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class Class {
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int field = 0;
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Class get next => this;
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int operator [](int key) => key;
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void operator []=(int key, int value) {}
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}
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main() {
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test(new Class());
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}
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test(Class? c) {
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c?.next.field; // ok
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throwsInStrong(() => c?.field + 2); // error
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++c?.field; // ok
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c?.field++; // ok
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throwsInStrong(() => (c?.next).field); // error
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throwsInStrong(() => -c?.field); // error
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c?.next[0].isEven; // ok
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throwsInStrong(() => c?.next[0] + 2); // error
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++c?.next[0]; // ok
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c?.next[0]++; // ok
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throwsInStrong(() => (c?.next[0]).isEven); // error
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throwsInStrong(() => -c?.next[0]); // error
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}
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final bool inStrongMode = _inStrongMode();
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bool _inStrongMode() {
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var f = (String? s) {
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s.length; // This will be an invalid expression in strong mode.
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};
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try {
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f("foo");
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} catch (e) {
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return true;
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}
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return false;
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}
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void throwsInStrong(void Function() f) {
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if (inStrongMode) {
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try {
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f();
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} catch (e) {
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print(e);
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return;
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}
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throw 'Expected exception.';
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} else {
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f();
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}
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}
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