| // 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 |
| |
| /// @assertion A type T0 is a subtype of a type T1 (written T0 <: T1) when: |
| /// Positional Function Types: T0 is U0 Function<X0 extends B00, ... , |
| /// Xk extends B0k>(V0 x0, ..., Vn xn, [Vn+1 xn+1, ..., Vm xm]) |
| /// |
| /// and T1 is U1 Function<Y0 extends B10, ..., Yk extends B1k>(S0 y0, ..., |
| /// Sp yp, [Sp+1 yp+1, ..., Sq yq]) |
| /// and p >= n |
| /// and m >= q |
| /// and Si[Z0/Y0, ..., Zk/Yk] <: Vi[Z0/X0, ..., Zk/Xk] for i in 0...q |
| /// and U0[Z0/X0, ..., Zk/Xk] <: U1[Z0/Y0, ..., Zk/Yk] |
| /// and B0i[Z0/X0, ..., Zk/Xk] === B1i[Z0/Y0, ..., Zk/Yk] for i in 0...k |
| /// where the Zi are fresh type variables with bounds B0i[Z0/X0, ..., Zk/Xk] |
| /// @description Check that if T0 and T1 satisfies the rules above, then T0 is |
| /// subtype of T1. Test generic types with Null type when p = n and m > q. |
| /// @author sgrekhov@unipro.ru |
| |
| |
| class A {} |
| |
| class C extends A {} |
| |
| class U0<X, Y, Z> extends U1<X, Y, Z> {} |
| |
| class U1<X, Y, Z> {} |
| |
| class B0<X, Y, Z> {} |
| |
| class B1<X, Y, Z> {} |
| |
| class V0<X, Y, Z> {} |
| |
| class V1<X, Y, Z> {} |
| |
| class V2<X, Y, Z> {} |
| |
| class V3<X, Y, Z> {} |
| |
| class V4<X, Y, Z> {} |
| |
| class S0<X, Y, Z> extends V0<X, Y, Z> {} |
| |
| class S1<X, Y, Z> extends V1<X, Y, Z> {} |
| |
| class S2<X, Y, Z> extends V2<X, Y, Z> {} |
| |
| class S3<X, Y, Z> extends V3<X, Y, Z> {} |
| |
| class X0<X, Y, Z> extends B0<X, Y, Z> {} |
| |
| class X1<X, Y, Z> extends B1<X, Y, Z> {} |
| |
| class Y0<X, Y, Z> extends B0<X, Y, Z> {} |
| |
| class Y1<X, Y, Z> extends B1<X, Y, Z> {} |
| |
| typedef T0 = U0<Null, Null, Null> Function<X extends B0, Y extends B1>( |
| V0<A, List, num> x0, V1<A, List, num> x1, |
| [V2<A, List, num> x2, V3<A, List, num> x3, V4<A, List, num> x4]); |
| typedef T1 = U1<A, List, num> Function<X extends B0, Y extends B1>( |
| S0<Null, Null, Null> y0, S1<Null, Null, Null> y1, |
| [S2<Null, Null, Null> x2, S3<Null, Null, Null> x3]); |
| |
| U0<Null, Null, Null> t0Func<X extends B0, Y extends B1>( |
| V0<A, List, num> x0, V1<A, List, num> x1, |
| [V2<A, List, num> x2, V3<A, List, num> x3, V4<A, List, num> x4]) => |
| null; |
| U1<A, List, num> t1Func<X extends B0, Y extends B1>( |
| S0<Null, Null, Null> y0, S1<Null, Null, Null> y1, |
| [S2<Null, Null, Null> x2, S3<Null, Null, Null> x3]) => |
| null; |
| |
| T0 t0Instance = t0Func; |
| T1 t1Instance = t1Func; |
| //# @T0 = T0 |
| //# @T1 = T1 |
| //# @GenericFunctionType |