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// Copyright (c) 2019, 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.
// Tests subclass usage for the `inout` variance modifier.
// SharedOptions=--enable-experiment=variance
typedef CovFunction<T> = T Function();
typedef ContraFunction<T> = void Function(T);
typedef InvFunction<T> = T Function(T);
class LegacyCovariant<T> {}
class Invariant<inout T>{}
class Covariant<out T> {}
class Contravariant<in T> {}
mixin MLegacyCovariant<T> {}
mixin MContravariant<in T> {}
mixin MCovariant<out T> {}
mixin MInvariant<inout T> {}
class A<inout T> extends LegacyCovariant<T> {}
class B<inout T> extends Invariant<T> {}
class C<inout T> extends Covariant<T> {}
class D<inout T> extends Contravariant<T> {}
class E<inout T> implements LegacyCovariant<T> {}
class F<inout T> implements Invariant<T> {}
class G<inout T> implements Covariant<T> {}
class H<inout T> implements Contravariant<T> {}
class I<inout T> with MLegacyCovariant<T> {}
class J<inout T> with MInvariant<T> {}
class K<inout T> with MCovariant<T> {}
class L<inout T> with MContravariant<T> {}
class M<inout T> extends Covariant<Contravariant<T>> {}
class N<inout T> extends Contravariant<Covariant<T>> {}
class O<inout T> extends Covariant<ContraFunction<T>> {}
class P<inout T> extends Covariant<ContraFunction<CovFunction<T>>> {}
class Q<inout T> extends Covariant<CovFunction<ContraFunction<T>>> {}
class R<inout T> extends Covariant<ContraFunction<Covariant<T>>> {}
class S<inout T> extends Contravariant<Contravariant<Contravariant<T>>> {}
class T<inout X> extends Covariant<Covariant<X>> {}
class U<inout T> extends Contravariant<Contravariant<T>> {}
class V<inout T> extends Covariant<CovFunction<T>> {}
class W<inout T> extends Covariant<ContraFunction<ContraFunction<T>>> {}
class X<inout T> extends Contravariant<CovFunction<Contravariant<T>>> {}
class Y<inout T> extends Covariant<CovFunction<Covariant<T>>> {}
class Z<inout T> extends Covariant<Covariant<Covariant<T>>> {}
class AA<inout T> extends Covariant<InvFunction<T>> {}
class AB<inout T> = Invariant<T> with MInvariant<T>;
class AC<inout T> = Covariant<T> with MCovariant<T>;
class AD<inout T> = Contravariant<T> with MContravariant<T>;
main() {
A<num> a = A();
B<num> b = B();
C<num> c = C();
D<num> d = D();
E<num> e = E();
F<num> f = F();
G<num> g = G();
H<num> h = H();
I<num> i = I();
J<num> j = J();
K<num> k = K();
L<num> l = L();
M<num> m = M();
N<num> n = N();
O<num> o = O();
P<num> p = P();
Q<num> q = Q();
R<num> r = R();
S<num> s = S();
T<num> t = T();
U<num> u = U();
V<num> v = V();
W<num> w = W();
X<num> x = X();
Y<num> y = Y();
Z<num> z = Z();
AA<num> aa = AA();
AB<num> ab = AB();
AC<num> ac = AC();
AD<num> ad = AD();