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/*
* 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.
*/
/**
* @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
*/
/**
* @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_A32.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 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;
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;
}