Konstantin Shcheglov
ba92b78acd
Bug: https://github.com/dart-lang/sdk/issues/42821 Change-Id: I153c48d7a2e4a02026928e6203aacf8f2dc029ba Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155849 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
53 lines
1.6 KiB
Dart
53 lines
1.6 KiB
Dart
// Copyright (c) 2012, 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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abstract class Interface {
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final x;
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Interface(this.x);
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}
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abstract class Abstract implements Interface {
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String toString() => x.toString();
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}
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// This class does not implement "x" either, but it is not marked
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// abstract.
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class SubAbstract1 extends Abstract {}
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// ^^^^^^^^^^^^
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// [analyzer] COMPILE_TIME_ERROR.NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER
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// [cfe] The non-abstract class 'SubAbstract1' is missing implementations for these members:
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// This class does not implement "x", but is itself abstract, so that's OK.
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abstract class SubAbstract2 extends Abstract {
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get x; // Abstract.
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}
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// This class does not implement "x" either, but it is not marked
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// abstract.
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class SubSubAbstract2 extends SubAbstract2 {}
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// ^^^^^^^^^^^^^^^
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// [analyzer] COMPILE_TIME_ERROR.NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER
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// [cfe] The non-abstract class 'SubSubAbstract2' is missing implementations for these members:
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class Concrete extends Abstract {
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get x => 7;
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}
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class SubConcrete extends Concrete {
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final x;
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SubConcrete(this.x);
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}
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void main() {
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new Abstract();
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// ^^^^^^^^
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// [analyzer] COMPILE_TIME_ERROR.INSTANTIATE_ABSTRACT_CLASS
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// [cfe] The class 'Abstract' is abstract and can't be instantiated.
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Expect.equals('7', new Concrete().toString());
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Expect.equals('42', new SubConcrete(42).toString());
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Expect.equals('7', new SubConcrete(new Concrete()).toString());
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}
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