mirror of
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32 lines
779 B
Dart
32 lines
779 B
Dart
// Copyright (c) 2017, 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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class A {
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void foo() {}
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}
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abstract class I {
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void foo([x]);
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}
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abstract class B extends A implements I {
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// If this class were concrete, there would be a problem, since `new
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// B().foo(42)` would be statically allowed, but would lead to invalid
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// arguments being passed to A.foo. But since the class is abstract, there is
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// no problem.
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}
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class /*@compile-error=unspecified*/ C extends B {
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// However, there is a problem here because this class is concrete and doesn't
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// override foo.
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}
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void f(B b) {
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b.foo();
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}
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main() {
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f(new C());
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}
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