Robert Nystrom
48608ce9bc
Change-Id: I8e21f82dc241a63f78fb1f6a25669b1aa633788c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/152080 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Leaf Petersen <leafp@google.com>
85 lines
3.7 KiB
Dart
85 lines
3.7 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 erroneous variance usage multiple type parameters.
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// SharedOptions=--enable-experiment=variance
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typedef CovFunction<T> = T Function();
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typedef ContraFunction<T> = void Function(T);
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class Covariant<out T> {}
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class Contravariant<in T> {}
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class MultiTwo<in T, out U> {}
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class MultiThree<in T, out U, inout V> {}
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class A<in T, out U, inout V> extends Covariant<T> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'out' position in supertype 'Covariant'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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class B<in T> extends MultiThree<T, T, T> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'inout' position in supertype 'MultiThree'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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class C<in T, out U, inout V> extends MultiTwo<U, T> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'out' position in supertype 'MultiTwo'.
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// ^
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// [cfe] Can't use 'out' type variable 'U' in an 'in' position in supertype 'MultiTwo'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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class D<in T, out U, inout V> extends MultiThree<V, U, T> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'inout' position in supertype 'MultiThree'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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class E<in T, out U, inout V> extends MultiThree<Covariant<U>, Covariant<T>, Covariant<U>> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'out' position in supertype 'MultiThree'.
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// ^
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// [cfe] Can't use 'out' type variable 'U' in an 'inout' position in supertype 'MultiThree'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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class F<in T, out U, inout V> extends MultiTwo<Contravariant<T>, Contravariant<U>> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'out' position in supertype 'MultiTwo'.
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// ^
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// [cfe] Can't use 'out' type variable 'U' in an 'in' position in supertype 'MultiTwo'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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class G<in T, out U, inout V> extends MultiThree<CovFunction<U>, CovFunction<T>, CovFunction<U>> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'out' position in supertype 'MultiThree'.
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// ^
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// [cfe] Can't use 'out' type variable 'U' in an 'inout' position in supertype 'MultiThree'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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class H<in T, out U, inout V> extends MultiTwo<ContraFunction<T>, ContraFunction<U>> {}
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// ^
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// [cfe] Can't use 'in' type variable 'T' in an 'out' position in supertype 'MultiTwo'.
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// ^
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// [cfe] Can't use 'out' type variable 'U' in an 'in' position in supertype 'MultiTwo'.
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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// ^
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// [analyzer] COMPILE_TIME_ERROR.WRONG_EXPLICIT_TYPE_PARAMETER_VARIANCE_IN_SUPERINTERFACE
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