| // Copyright (c) 2018, 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. |
| |
| // @dart = 2.9 |
| |
| import "package:expect/expect.dart"; |
| |
| class I<X> {} |
| |
| class C0<T> extends I<T> {} |
| class C1<T> implements I<T> {} |
| |
| mixin M0<T> on I<T> { |
| } |
| |
| mixin M1<T> on I<T> { |
| T Function(T) get value => null; |
| } |
| |
| mixin M2<T> implements I<T> {} |
| |
| mixin M3<T> on I<T> {} |
| |
| class J<X> {} |
| class C2 extends C1<int> implements J<double> {} |
| class C3 extends J<double> {} |
| |
| mixin M4<S, T> on I<S>, J<T> { |
| S Function(S) get value0 => null; |
| T Function(T) get value1 => null; |
| } |
| |
| // M4 is inferred as M4<int, double> |
| class A21 extends C3 with M2<int>, M4 { |
| void check() { |
| // Verify that M4.S is exactly int |
| int Function(int) f0 = this.value0; |
| // Verify that M4.T is exactly double |
| double Function(double) f1 = this.value1; |
| } |
| } |
| |
| void main() { |
| Expect.type<M4<int, double>>(new A21()..check()); |
| } |