Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
44 lines
1.1 KiB
Dart
44 lines
1.1 KiB
Dart
// Copyright (c) 2013, 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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import "package:expect/expect.dart";
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class A {
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var _x, _y;
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A(x, [y = 10])
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: _x = x++,
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_y = y++ {
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// Check that value of modified constructor parameters
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// is remembered in the constructor body.
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Expect.equals(x, _x + 1);
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Expect.equals(y, _y + 1);
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}
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}
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class B extends A {
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var _a, _b;
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// The super call in the middle of the initializer list conceptually
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// forces two super call chains, one for initializer list and a second
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// one for the constructor bodies.
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B(a, b)
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: _a = a++,
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_b = b++,
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super(a + b++) {
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Expect.equals(a, _a + 1);
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Expect.equals(b, _b + 2);
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Expect.equals(a + (b - 2), _x - 1);
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}
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}
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main() {
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dynamic o = new B(3, 5);
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Expect.equals(3, o._a);
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Expect.equals(5, o._b);
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Expect.equals(10, o._x);
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Expect.equals(10, o._y);
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o = new A(3);
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Expect.equals(3, o._x);
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Expect.equals(10, o._y);
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}
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