| // Copyright (c) 2017, 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. |
| |
| /*@testedFeatures=inference*/ |
| library test; |
| |
| abstract class C<E> { |
| void sort([int Function(E a, E b)? compare]) { |
| /*@typeArgs=C::E%*/ sort2(this, compare ?? _compareAny); |
| } |
| |
| static int _compareAny(a, b) { |
| throw 'unimplemented'; |
| } |
| |
| static void sort2<E>(C<E> a, int compare(E a, E b)) { |
| throw 'unimplemented'; |
| } |
| } |
| |
| main() {} |