blob: e830d15148a61ee05025ceb097c94a74955d7236 [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.9
import "package:expect/expect.dart";
abstract class Interface {
final x;
Interface(this.x);
}
abstract class Abstract implements Interface {
String toString() => x.toString();
}
// This class does not implement "x" either, but it is not marked
// abstract.
class SubAbstract1 extends Abstract {}
// ^^^^^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER
// [cfe] The non-abstract class 'SubAbstract1' is missing implementations for these members:
// This class does not implement "x", but is itself abstract, so that's OK.
abstract class SubAbstract2 extends Abstract {
get x; // Abstract.
}
// This class does not implement "x" either, but it is not marked
// abstract.
class SubSubAbstract2 extends SubAbstract2 {}
// ^^^^^^^^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER
// [cfe] The non-abstract class 'SubSubAbstract2' is missing implementations for these members:
class Concrete extends Abstract {
get x => 7;
}
class SubConcrete extends Concrete {
final x;
SubConcrete(this.x);
}
void main() {
new Abstract();
// ^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.INSTANTIATE_ABSTRACT_CLASS
// [cfe] The class 'Abstract' is abstract and can't be instantiated.
Expect.equals('7', new Concrete().toString());
Expect.equals('42', new SubConcrete(42).toString());
Expect.equals('7', new SubConcrete(new Concrete()).toString());
}