Robert Nystrom
2658f495f2
Change-Id: Ic30aef0302e1d2a2812eeb81b414a69e7591f625 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149622 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com>
37 lines
890 B
Dart
37 lines
890 B
Dart
// Copyright (c) 2018, 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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// A mixin declaration introduces a static scope.
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// Instance members keep seeing this scope when mixed in.
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abstract class UnaryNum {
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num foo(num x);
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}
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mixin M1 on UnaryNum {
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static int counter = 0;
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static int next() => ++counter;
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int count() => foo(next()) as int;
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}
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class C1 implements UnaryNum {
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static int counter = 87;
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static int next() => 42;
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num foo(num x) => x * 10;
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}
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class A1 = C1 with M1;
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main() {
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Expect.equals(0, M1.counter);
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Expect.equals(1, M1.next());
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Expect.equals(2, M1.next());
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var a = A1();
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Expect.equals(30, a.count());
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Expect.equals(40, a.count());
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Expect.equals(5, M1.next());
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}
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