Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
36 lines
1.2 KiB
Dart
36 lines
1.2 KiB
Dart
// Copyright (c) 2015, 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 M<U extends V, V> {}
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class N<U, V extends U> {}
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class S<T> {}
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class MNA<U, V extends U, W> extends S<List<U>>
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with M<V, U>, N<List<W>, List<W>> {}
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class MNA2<U, V extends U, W> = S<List<U>> with M<V, U>, N<List<W>, List<W>>;
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main() {
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new MNA<num, int, bool>();
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new MNA2<num, int, bool>();
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// Type parameter U of M must extend type parameter V, but
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// type argument num is not a subtype of int.
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new MNA<int, num, bool>();
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// ^
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// [cfe] Type argument 'num' doesn't conform to the bound 'U' of the type variable 'V' on 'MNA'.
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// ^^^
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// [analyzer] COMPILE_TIME_ERROR.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS
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// Type parameter U of M must extend type parameter V, but
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// type argument num is not a subtype of int.
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new MNA2<int, num, bool>();
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// ^
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// [cfe] Type argument 'num' doesn't conform to the bound 'U' of the type variable 'V' on 'MNA2'.
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// ^^^
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// [analyzer] COMPILE_TIME_ERROR.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS
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}
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