| /* |
| * 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. |
| */ |
| /** |
| * @assertionA 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 when p == n and m == q |
| * @author sgrekhov@unipro.ru |
| */ |
| /** |
| * @description Check that if type T0 is a subtype of a type T1, then instance |
| * of T0 can be be used as a return value of type T1 |
| * @author sgrekhov@unipro.ru |
| */ |
| /* |
| * This test is generated from positional_function_types_A41.dart and |
| * return_value_x01.dart. |
| * Don't modify it. If you want to change this file, change one of the files |
| * above and then run generator.dart to regenerate the tests. |
| */ |
| |
| |
| |
| class A {} |
| |
| class C extends A {} |
| |
| class U<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> {} |
| |
| typedef T0 = U<C, List<String>, int> 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]); |
| typedef T1 = U<A, List, num> Function<X extends B0, Y extends B1>( |
| V0<C, List<String>, int> y0, V1<C, List<String>, int> y1, |
| [V2<C, List<String>, int> x2, V3<C, List<String>, int> x3]); |
| |
| U<C, List<String>, int> 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]) => |
| null; |
| U<A, List, num> t1Func<X extends B0, Y extends B1>( |
| V0<C, List<String>, int> y0, V1<C, List<String>, int> y1, |
| [V2<C, List<String>, int> x2, V3<C, List<String>, int> x3]) => |
| null; |
| |
| T0 t0Instance = t0Func; |
| T1 t1Instance = t1Func; |
| |
| |
| |
| T1 returnValueFunc() => t0Instance; |
| |
| class ReturnValueTest { |
| static T1 staticTestMethod() => t0Instance; |
| |
| T1 testMethod() => t0Instance; |
| |
| T1 get testGetter => t0Instance; |
| } |
| |
| main() { |
| T1 returnValueLocalFunc() => t0Instance; |
| |
| returnValueFunc(); |
| returnValueLocalFunc(); |
| |
| ReturnValueTest.staticTestMethod(); |
| |
| new ReturnValueTest().testMethod(); |
| new ReturnValueTest().testGetter; |
| |
| } |
| |