John Messerly
30 lines
716 B
Dart
30 lines
716 B
Dart
// Copyright (c) 2014, 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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const factory A() = B;
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}
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class B implements A {
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const B();
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operator ==(o) => true; /// 00: compile-time error
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}
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confuse(x) {
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if (new DateTime.now() == 42) return confuse(2);
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return x;
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}
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main() {
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// It is a compile-time error if the key type overrides operator ==.
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var m = const { const A(): 42 };
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Expect.equals(42, m[confuse(const B())]);
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m = const { "foo": 99, const A(): 499 };
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Expect.equals(499, m[confuse(const B())]);
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}
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