Konstantin Shcheglov
3e26a5d0dd
...but don't recommend to enabled any experiment. R=brianwilkerson@google.com, paulberry@google.com Bug: https://github.com/dart-lang/sdk/issues/40957 Change-Id: I556ce9952b28d0b079521ac46558f8e3adf352c5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/144982 Commit-Queue: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
77 lines
2.1 KiB
Dart
77 lines
2.1 KiB
Dart
// Copyright (c) 2019, 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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// Tests with `variance` flag disabled
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// Correct variance modifier usage will issue an error.
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import 'package:expect/expect.dart';
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abstract class A<in X> {
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// ^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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int foo(X bar);
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}
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class B<out X, in Y, inout Z> {}
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// ^^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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// ^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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class C<in T> extends A<T> {
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// ^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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@override
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int foo(T bar) {
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return 2;
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}
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}
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mixin D<out T> {}
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// ^^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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class E1 {}
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mixin E<in T extends E1> {}
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// ^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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class F<out T> = Object with D<T>;
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// ^^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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class G<out out> {}
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// ^^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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class H<out inout> {}
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// ^^^
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// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
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// [cfe] This requires the 'variance' language feature to be enabled.
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main() {
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B<int, String, bool> b = B();
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C<int> c = C();
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Expect.equals(2, c.foo(3));
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F<int> f = F();
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G<int> g = G();
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H<int> h = H();
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}
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