mirror of
https://github.com/dart-lang/sdk
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05ca544f15
Change-Id: Iaa0ca2b4f2d1b15f79ddca37834d3ed2497bc068 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149242 Commit-Queue: Joshua Litt <joshualitt@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
79 lines
1.5 KiB
Dart
79 lines
1.5 KiB
Dart
// Copyright (c) 2012, 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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// @dart = 2.7
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import "package:expect/expect.dart";
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class A {
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List<int> list;
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A(int a, int b) : list = <int>[a, b];
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operator [](index) => list[index];
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operator []=(index, value) => list[index] = value;
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}
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class B {
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int value;
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List trace;
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B(this.trace) : value = 100;
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operator [](index) {
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trace.add(-3);
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trace.add(index);
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trace.add(this.value);
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this.value = this.value + 1;
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return this;
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}
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operator []=(index, value) {
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trace.add(-5);
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trace.add(index);
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trace.add(value.value);
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this.value = this.value + 1;
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}
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operator +(int value) {
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trace.add(-4);
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trace.add(this.value);
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trace.add(value);
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this.value = this.value + 1;
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return this;
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}
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}
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B getB(trace) {
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trace.add(-1);
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return new B(trace);
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}
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int getIndex(trace) {
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trace.add(-2);
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return 42;
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}
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main() {
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A a = new A(1, 2);
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Expect.equals(1, a[0]);
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Expect.equals(2, a[1]);
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Expect.equals(1, a[0]++);
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Expect.equals(2, a[0]);
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Expect.equals(2, a[0]--);
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Expect.equals(1, a[0]);
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Expect.equals(0, --a[0]);
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Expect.equals(0, a[0]);
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Expect.equals(1, ++a[0]);
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Expect.equals(1, a[0]);
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a[0] += 2;
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Expect.equals(3, a[0]);
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List trace = new List();
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getB(trace)[getIndex(trace)] += 37;
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Expect.listEquals([-1, -2, -3, 42, 100, -4, 101, 37, -5, 42, 102], trace);
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}
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