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>
33 lines
903 B
Dart
33 lines
903 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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static const b = const 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;
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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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dynamic m = const {A.b: 42};
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// ^
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// [cfe] Constant evaluation error:
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// ^^^
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// [analyzer] COMPILE_TIME_ERROR.CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS
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Expect.equals(42, m[const B()]);
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m = const {"foo": 99, A.b: 499};
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// ^
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// [cfe] Constant evaluation error:
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// ^^^
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// [analyzer] COMPILE_TIME_ERROR.CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS
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Expect.equals(499, m[const B()]);
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}
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