blob: 4c3d6f347e58902663fb02fa06b201c0bb701ab9 [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.7
import "package:expect/expect.dart";
class A {
List<int> list;
A(int a, int b) : list = <int>[a, b];
operator [](index) => list[index];
operator []=(index, value) => list[index] = value;
}
class B {
int value;
List trace;
B(this.trace) : value = 100;
operator [](index) {
trace.add(-3);
trace.add(index);
trace.add(this.value);
this.value = this.value + 1;
return this;
}
operator []=(index, value) {
trace.add(-5);
trace.add(index);
trace.add(value.value);
this.value = this.value + 1;
}
operator +(int value) {
trace.add(-4);
trace.add(this.value);
trace.add(value);
this.value = this.value + 1;
return this;
}
}
B getB(trace) {
trace.add(-1);
return new B(trace);
}
int getIndex(trace) {
trace.add(-2);
return 42;
}
main() {
A a = new A(1, 2);
Expect.equals(1, a[0]);
Expect.equals(2, a[1]);
Expect.equals(1, a[0]++);
Expect.equals(2, a[0]);
Expect.equals(2, a[0]--);
Expect.equals(1, a[0]);
Expect.equals(0, --a[0]);
Expect.equals(0, a[0]);
Expect.equals(1, ++a[0]);
Expect.equals(1, a[0]);
a[0] += 2;
Expect.equals(3, a[0]);
List trace = new List();
getB(trace)[getIndex(trace)] += 37;
Expect.listEquals([-1, -2, -3, 42, 100, -4, 101, 37, -5, 42, 102], trace);
}